Inverted Dual-Feed Microwave Detection Module

Abstract

The present invention discloses an inverting dual-fed microwave detection module, wherein the inverting dual-fed microwave detection module includes a feed source, a reference ground, and at least one radiation element. The radiation element is spaced from the reference ground. The feed source is configured to be powered and output a first excitation signal with the positive pole or the ground pole of the corresponding power supply as the reference ground pole, and a second excitation signal that is in antiphase with the first excitation signal. Each of the radiation elements equivalently has two electrical feeding points, and the connection line of the two electrical feeding points of each radiation element passes through the physical center point of the radiation element. Each radiation element is configured to receive the first excitation signal at one of the electrical feeding points and receive the second excitation signal at the other electrical feeding point to form an inverting dual-feed for the radiation element.

Description

Technical Field

[0001] The present invention relates to the field of microwave detection, and in particular to an in-phase dual-feed microwave detection module for microwave detection based on the Doppler effect principle. Background Art

[0002] With the development of Internet of Things technology, the requirements for environmental detection in artificial intelligence, smart home, and intelligent security technologies, especially for the detection accuracy of the presence, movement, and micro-movement characteristics of people, are getting higher and higher. Only by obtaining sufficiently stable detection results can accurate judgment bases be provided for intelligent terminal devices. Among them, radio technologies, including microwave detection technologies based on the Doppler effect principle, have unique advantages in behavior detection and presence detection technologies as an important hub for connecting people and things, and things and things. They can detect moving objects, such as human motion characteristics, movement characteristics, and micro-movement characteristics, and even human heartbeat and breathing characteristic information without infringing on people's privacy, so they have broad application prospects.

[0003] Furthermore, in the ISM band defined by ITU-R (ITU Radiocommunication Sector) for unlicensed use by institutions such as industry, science, and medicine, the frequency bands applied to microwave detection mainly include limited frequency band resources such as 2.4 GHz, 5.8 GHz, 10.525 GHz, and 24.125 GHz. And the corresponding microwave detectors need to comply with a certain transmission power (generally the transmission power is below 1W) when using these frequency bands to reduce interference to other radio devices. Although the definition and permission of different frequency bands can standardize the used frequency bands of radio and reduce the probability of mutual interference between radio devices in different frequency bands, under the limited frequency band resource permission, with the rapid development of Internet of Things technology and the rapid increase in the radio usage coverage rate of adjacent or the same frequency bands, the problem of mutual interference between radios in adjacent or the same frequency bands is becoming increasingly serious. Moreover, with the people-oriented intelligent competition, the demand for accurate detection of human motion characteristics including breathing motion and even heartbeat motion has also increased rapidly. Therefore, anti-interference performance, as one of the influencing factors for measuring the accuracy of the corresponding microwave detection module, in the context of the increasingly serious problem of mutual interference between radios, it is difficult to maintain the accuracy of the existing microwave detection module, let alone improve it to meet the demand for accurate detection of human motion characteristics including breathing motion and even heartbeat motion.

[0004] Specifically, among existing microwave detection modules, microwave detection modules using patch antenna structure design are more delicate in feedback on human activities and are relatively popular. Among them, the corresponding feed design is divided into a transceiver-in-one design and a transceiver-separated design. Refer to Figure 1 as shownFigure 1 Fig. Figure 1 shows a structure of an existing microwave detection module adopting a transceiver integrated design. The existing microwave detection module adopting a transceiver integrated design includes a reference ground 10P and a radiation source 20P. The radiation source 20P includes at least one radiation element 21P. Each of the radiation elements 21P is spaced from the reference ground 10P in a state approaching parallelism. Each of the radiation elements 21P is provided with and only has one feeding point 211P. Each of the radiation elements 21P is fed at its feeding point 211P to emit a microwave beam corresponding to the frequency of the corresponding excitation signal and interact with the reference ground 10P, and receive a reflected echo formed by the reflection of the microwave beam by a corresponding object, and transmit an echo signal corresponding to the frequency of the reflected echo at the feeding point 211P, so as to generate a Doppler intermediate frequency signal corresponding to the frequency difference between the excitation signal and the echo signal by means of mixing and detection based on the Doppler effect principle in the subsequent stage. The Doppler intermediate frequency signal is a feedback on the activity of the corresponding object. Since the radiation element 21P is fed and transmits the echo signal at the same point, the number of the radiation elements 21P is allowed to correspond to Figure 1 one, in order to adapt to the current miniaturization trend. However, on the one hand, an additional phase shift circuit needs to be set up to meet the phase requirements for the mixing process of the excitation signal and the echo signal, which is likely to cause layout congestion of the existing microwave detection module adopting a transceiver integrated design and is not conducive to its anti-interference performance while increasing the cost. On the other hand, the influence between the excitation signal and the echo signal cannot be avoided, which is not conducive to the mixing process of the excitation signal and the echo signal, and correspondingly reduces the accuracy and stability of the existing microwave detection module adopting a transceiver integrated design.

[0005] In summary, it is difficult for the current microwave detection module to adapt to the current miniaturization trend while meeting the current detection accuracy requirements. Summary of the Invention

[0006] An object of the present invention is to provide an in-phase double-fed microwave detection module, wherein the in-phase double-fed microwave detection module includes at least one radiation element, each of the radiation elements equivalently having two electrical feeding points, and the connection line of the two electrical feeding points of the radiation element passes through the physical center point of the radiation element. By applying a first excitation signal and a second excitation signal that is in opposite phase to the first excitation signal to the two electrical feeding points of each radiation element respectively for in-phase double feeding of the radiation element, in the state where the radiation element is in-phase double-fed, a zero potential point of the radiation element is formed at the physical center point of the radiation element, thereby facilitating suppression of polarization balance mismatch caused by the shape design and processing error of the radiation element, and further improving the radiation efficiency of the in-phase double-fed microwave detection module in a manner of balancing and ensuring the potential distribution intensity of the radiation element in the fed state, and correspondingly improving the accuracy of the in-phase double-fed microwave detection module.

[0007] Another object of the present invention is to provide an in-phase double-fed microwave detection module, wherein in the state where the connection line of the two electrical feeding points of the radiation element passes through the physical center point of the radiation element, based on the design of the corresponding matching network electrically connected to the two electrical feeding points, a zero potential point of the radiation element can be formed at the physical center point of the radiation element in the state where the radiation element is in-phase double-fed. That is to say, the in-phase state of the first excitation signal and the second excitation signal corresponds to the distribution of the first excitation signal and the second excitation signal with the zero point of a cycle of the excitation signal as the boundary, without restricting that the absolute amplitudes of the first excitation signal and the second excitation signal are the same. That is, in the state where the connection line of the two electrical feeding points of the radiation element passes through the physical center point of the radiation element, the two electrical feeding points are not restricted to be symmetric with respect to the physical center point of the radiation element, and based on the design of the corresponding matching network, a zero potential point of the radiation element can be formed at the physical center point of the radiation element in the state where the radiation element is in-phase double-fed. Therefore, the circuit design of the corresponding in-phase double-fed microwave detection module is flexible and diverse and can adapt to different layout requirements.

[0008] Another object of the present invention is to provide an inverting dual-fed microwave detection module, wherein the midpoint of the connection line between the two electrical feeding points of the radiating element is located at the physical center point of the radiating element, that is, in a state where the connection line between the two electrical feeding points of the radiating element passes through the physical center point of the radiating element, the two electrical feeding points are symmetric with respect to the physical center point of the radiating element. In this way, it is beneficial to simplify the design of the corresponding matching network, and in the state where the radiating element is inverting dual-fed, ensure that the zero-potential point of the radiating element is formed at the physical center point of the radiating element, thereby being beneficial to further suppressing the polarization balance mismatch caused by the shape design and processing error of the radiating element, and further improving the radiation efficiency of the inverting dual-fed microwave detection module in a manner of balancing and ensuring the potential distribution intensity of the radiating element in the fed state, and correspondingly improving the accuracy of the inverting dual-fed microwave detection module.

[0009] Another object of the present invention is to provide an inverting dual-fed microwave detection module, wherein the radiating element is arranged symmetrically with respect to the connection line between the two electrical feeding points, so as to further suppress the polarization balance mismatch caused by the shape design of the radiating element in the state where the radiating element is inverting dual-fed, and further improve the radiation efficiency of the inverting dual-fed microwave detection module in a manner of balancing and ensuring the potential distribution intensity of the radiating element in the fed state, and correspondingly improving the accuracy of the inverting dual-fed microwave detection module.

[0010] Another object of the present invention is to provide an inverting dual-fed microwave detection module, wherein the inverting dual-fed microwave detection module includes a feed source, and the feed source is arranged to be powered and output the first excitation signal and the second excitation signal that is in opposite phase to the first excitation signal through the matching network with the positive electrode or the ground electrode of the corresponding power supply as the reference ground electrode. In the state where each radiating element is inverting dual-fed by accessing the first excitation signal at one of the electrical feeding points and accessing the second excitation signal at the other electrical feeding point, each radiating element is electrically connected to the reference ground electrode at the physical center point of the radiating element. In this way, a closed-loop circuit for the first excitation signal and the second excitation signal is formed between the two electrical feeding points of the radiating element and the physical center point of the radiating element respectively, thereby reducing the impedance of the inverting dual-fed microwave detection module at frequencies deviating from the resonant operating point, and correspondingly narrowing the bandwidth of the inverting dual-fed microwave detection module, which is beneficial to improving the anti-interference performance of the inverting dual-fed microwave detection module.

[0011] Another object of the present invention is to provide an in-phase double-fed microwave detection module. In the state where the radiation element is in-phase double-fed, based on the potential distribution relationship that the physical center point of the radiation element is the zero-potential point of the radiation element, by electrically connecting the physical center point of the radiation element to the reference ground electrode, the potential distribution of the radiation element can be maintained to maintain the radiation efficiency of the in-phase double-fed microwave detection module. That is, based on the structural design that the radiation element is symmetric about the connection line of the two electrical feeding points and the midpoint of the connection line of the two electrical feeding points is located at the physical center point of the radiation element, the electrical connection between the physical center point of the radiation element and the reference ground electrode can avoid energy loss caused by physical short-circuit and maintain the radiation efficiency of the in-phase double-fed microwave detection module, and at the same time improve the anti-interference performance of the in-phase double-fed microwave detection module.

[0012] Another object of the present invention is to provide an in-phase double-fed microwave detection module, wherein the feed source has a three-terminal transistor configured as a triode or a field effect transistor. In the state where the three-terminal transistor is configured as a triode, each radiation element is electrically coupled to the emitter of the triode at one of the electrical feeding points and electrically coupled to the collector of the triode at the other electrical feeding point. In the state where the three-terminal transistor is configured as a field effect transistor, each radiation element is electrically coupled to the source of the field effect transistor at one of the electrical feeding points and electrically coupled to the drain of the field effect transistor at the other electrical feeding point, so as to form an in-phase double-feed for the radiation element in the state where the feed source is powered.

[0013] Another object of the present invention is to provide an in-phase double-fed microwave detection module, wherein the in-phase double-fed microwave detection module includes a reference ground, and each radiation element is spaced from the reference ground. In the state where the radiation element is in-phase double-fed, the reference ground is connected to the reference ground electrode, and each radiation element is electrically connected to the reference ground through a metallized via structure at the physical center point of the radiation element, so as to form a relationship in which the physical center point of the radiation element is electrically connected to the reference ground electrode. Therefore, it is simple and easy to implement and will not cause congestion in the circuit layout, which is beneficial to improving the anti-interference performance of the in-phase double-fed microwave detection module and its adaptability to the current miniaturization trend.

[0014] Another object of the present invention is to provide an in-phase double-fed microwave detection module, wherein the in-phase double-fed microwave detection module further includes a microstrip mixer, and the radiation element is electrically coupled to the three-terminal transistor through the microstrip mixer at one of the electrical feeding points, so as to simultaneously receive the corresponding echo signal at this electrical feeding point to realize the transceiver integrated design of the in-phase double-fed microwave detection module, which is beneficial to improving the adaptability of the in-phase double-fed microwave detection module to the current miniaturization trend.

[0015] Another object of the present invention is to provide an in-phase double-fed microwave detection module, wherein the radiation efficiency and anti-interference performance of the in-phase double-fed microwave detection module are simultaneously improved, and the detection accuracy corresponding to the in-phase double-fed microwave detection module is improved, which is beneficial to improving the accuracy of detecting weak movements by the in-phase double-fed microwave detection module, so that the in-phase double-fed microwave detection module is applicable to the detection of weak movements such as human body movement, micro-movement, breathing and heartbeat and is applied to human presence detection.

[0016] Another object of the present invention is to provide an in-phase double-fed microwave detection module, wherein in the state where the radiation element is in-phase double-fed, based on the potential distribution relationship that the physical center point of the radiation element is the zero potential point of the radiation element, by electrically connecting the physical center point of the radiation element to the reference ground electrode, the excitation electric field generated by the radiation element presents a symmetric and balanced distribution state, so that the back lobe and side lobe formed by the polarization balance mismatch of the radiation element in the corresponding microwave beam can be suppressed, thereby being beneficial to optimizing the front-to-back ratio of the in-phase double-fed microwave detection module and improving the anti-interference ability of the in-phase double-fed microwave detection module in the backward and lateral directions while increasing the gain of the in-phase double-fed microwave detection module.

[0017] Another object of the present invention is to provide an in-phase double-fed microwave detection module, wherein in the state where the radiation element is in-phase double-fed, based on the potential distribution relationship that the physical center point of the radiation element is the zero potential point of the radiation element, by electrically connecting the physical center point of the radiation element to the reference ground electrode, the excitation electric field generated by the radiation element presents a symmetric and balanced distribution state, which is beneficial to reducing the insertion loss of the in-phase double-fed microwave detection module and increasing the gain of the in-phase double-fed microwave detection module, corresponding to reducing the size requirement for the reference ground, that is, under the same gain performance requirement for the in-phase double-fed microwave detection module, the size of the reference ground can be reduced while ensuring the gain of the in-phase double-fed microwave detection module, thus being beneficial to the miniaturization design of the in-phase double-fed microwave detection module.

[0018] Another object of the present invention is to provide an inverting dual-fed microwave detection module, wherein the description of the position of the electrical feeding point defines the electrical equivalent feeding position of the radiating element. The physical feeding implementation structures of the electrical feeding points are diverse, and the physical feeding structures corresponding to the two electrical feeding points of the same radiating element are not restricted to be the same. Therefore, the circuit design of the corresponding inverting dual-fed microwave detection module is flexible and diverse and can adapt to different layout requirements.

[0019] Another object of the present invention is to provide an inverting dual-fed microwave detection module. Based on the structural design that the radiating element is symmetric about the connection line of the two electrical feeding points and the midpoint of the connection line of the two electrical feeding points is located at the physical center point of the radiating element, the electrical connection relationship between the two electrical feeding points and the three-terminal transistor can be interchanged. Taking the electrical feeding point for accessing the first excitation signal as an example, in the state of the point feeding (probe feeding) structure corresponding to this electrical feeding point, when the radiating element is implemented with a feeding connection point deviating from the physical center point of the radiating element on the radiating element to access the first excitation signal, the electrical feeding point takes the feeding connection point. When the radiating element is implemented with two feeding connection points deviating from the physical center point of the radiating element on the radiating element to access the first excitation signal, the electrical equivalent feeding point of the radiating element is located at the midpoint of the connection line of the two feeding connection points, that is, the electrical feeding point takes the midpoint of the connection line of the two feeding connection points, and the positional relationship between the two feeding connection points is set to satisfy that the midline of the connection line of the two feeding connection points passes through the physical center point of the radiating element. That is, in the state of the point feeding (probe feeding) structure corresponding to the electrical feeding point, the description of the electrical connection relationship and position of the electrical feeding point defines the electrical connection relationship of the physical feeding connection point and the electrical equivalent feeding position of the radiating element. The specific number and position of the feeding connection points are flexible and variable. Accordingly, the circuit design of the inverting dual-fed microwave detection module is flexible and diverse and can adapt to different layout requirements.

[0020] Another object of the present invention is to provide an inverting dual-feed microwave detection module. In a state where the electrical feeding point corresponds to a microstrip feeding structure, the radiating element is connected to the first excitation signal or the second excitation signal through a microstrip feeding line. The electrical feeding point is electrically equivalent to the point on the radiating element that is electrically connected to the microstrip feeding line. That is, the description of the electrical connection relationship and position of the electrical feeding point corresponds to the electrical connection relationship and position definition of the point on the radiating element that is electrically connected to the microstrip feeding line. The physical feeding structures corresponding to the electrical feeding points are diverse, and the physical feeding structures corresponding to the two electrical feeding points of the same radiating element are not restricted to be the same. Therefore, the circuit design of the corresponding inverting dual-feed microwave detection module is flexible and diverse and can adapt to different layout requirements.

[0021] Another object of the present invention is to provide an inverting dual-feed microwave detection module. In a state where the electrical feeding point corresponds to an edge feeding structure, the radiating element is connected to the first excitation signal or the second excitation signal through an edge feeder. The edge feeder is a microstrip line adjacent to and parallel to the straight edge of the radiating element. The electrically equivalent feeding point of the radiating element is electrically equivalent to the midpoint of the edge feeder that is set as a microstrip line. That is, the description of the electrical connection relationship and position of the electrical feeding point is the definition of the electrical connection relationship of the physical edge feeder and the midpoint position of the edge feeder. The specific position where the edge feeder is connected to the first excitation signal or the second excitation signal is not limited and does not affect the definition of the position of the electrical feeding point. Therefore, the circuit design of the corresponding inverting dual-feed microwave detection module is flexible and diverse and can adapt to different layout requirements.

[0022] According to one aspect of the present invention, the present invention provides an inverting dual-feed microwave detection module, wherein the inverting dual-feed microwave detection module includes:

[0023] A feed source, wherein the feed source is configured to be powered and output a first excitation signal and a second excitation signal that is opposite in phase to the first excitation signal with the positive pole or the ground pole of the corresponding power supply as the reference ground pole;

[0024] A reference ground, wherein the reference ground is configured as a sheet-shaped conductive layer; and

[0025] At least one radiation element, wherein each of the radiation elements is arranged as a sheet-shaped conductive layer and is spaced from the reference ground in a state where the planes of the two sheet-shaped conductive layers tend to be parallel, wherein each of the radiation elements equivalently has two electrical feeding points, wherein the connection line of the two electrical feeding points of each of the radiation elements passes through the physical center point of the radiation element, and wherein each of the radiation elements is arranged such that the first excitation signal is connected to one of the electrical feeding points and the second excitation signal is connected to the other electrical feeding point, so as to form an in-phase dual feeding for the radiation element.

[0026] In one embodiment, the feed source has a three-terminal transistor arranged as a triode or a field effect transistor. In the state where the three-terminal transistor is arranged as a triode, each of the radiation elements is electrically coupled to the emitter or base of the triode at one of the electrical feeding points, and is electrically coupled to the collector of the triode at the other electrical feeding point. In the state where the three-terminal transistor is arranged as a field effect transistor, each of the radiation elements is electrically coupled to the source or gate of the field effect transistor at one of the electrical feeding points, and is electrically coupled to the drain of the field effect transistor at the other electrical feeding point. Thus, in the state where the feed source is powered, an in-phase dual feeding for the radiation element is formed.

[0027] In one embodiment, the feed source is implemented as an oscillation circuit having the three-terminal transistor in the form of an analog circuit.

[0028] In one embodiment, the three-terminal transistor is arranged as a triode. One of the electrical feeding points of the radiation element is electrically coupled to the collector of the triode through an equivalent capacitor, and the other electrical feeding point is electrically coupled to the emitter of the triode through another equivalent capacitor. The equivalent capacitor is a circuit or electronic component having capacitance characteristics under an electrical signal at the frequency corresponding to the first excitation signal and the second excitation signal.

[0029] In one embodiment, at least one of the equivalent capacitors is implemented as a capacitor element.

[0030] In one embodiment, at least one of the equivalent capacitors is implemented as a microstrip distributed capacitor.

[0031] In one embodiment, the in-phase dual feeding type microwave detection module further includes a microstrip mixer, and each of the radiation elements is electrically coupled to the three-terminal transistor through the microstrip mixer at one of the electrical feeding points of the radiation element.

[0032] In one embodiment, the feed is designed in the form of an integrated circuit and is arranged as a microwave chip integrated with the three-terminal transistor. The microwave chip has two emission terminals. When the three-terminal transistor is arranged in the state of a triode, the two emission terminals of the microwave chip are electrically coupled to the collector and the emitter of the triode respectively. When the three-terminal transistor is arranged in the state of a field-effect transistor, the two emission terminals of the microwave chip are electrically coupled to the source and the drain of the field-effect transistor respectively, so as to output the first excitation signal at one of the emission terminals and output the second excitation signal that is opposite in phase to the first excitation signal at the other emission terminal.

[0033] In one embodiment, the feed is designed in the form of a semi-integrated circuit and is arranged as a microwave chip externally connected with the three-terminal transistor. The microwave chip has an emission terminal for correspondingly outputting the first excitation signal. When the three-terminal transistor is arranged in the state of a triode, the emission terminal of the microwave chip is electrically coupled to the base or the emitter of the triode, so as to output the first excitation signal at the emission terminal and output the second excitation signal at the collector of the triode. When the three-terminal transistor is arranged in the state of a field-effect transistor, the emission terminal of the microwave chip is electrically coupled to the gate or the source of the field-effect transistor, so as to output the first excitation signal at the emission terminal and output the second excitation signal at the drain of the field-effect transistor.

[0034] In one embodiment, the feed is arranged as a microwave chip having two emission terminals, and the microwave chip is arranged to output the first excitation signal at one of the emission terminals and output the second excitation signal that is opposite in phase to the first excitation signal at the other emission terminal.

[0035] In one embodiment, when the feed is powered, each radiation element is electrically connected to the reference ground electrode at the physical center point of the radiation element.

[0036] In one embodiment, the midpoint of the connection line between the two electrical feeding points of the radiation element is located at the physical center point of the radiation element, that is, the two electrical feeding points of the radiation element are symmetric with respect to the physical center point of the radiation element.

[0037] In one embodiment, the radiation element is arranged to be symmetric with respect to the connection line between the two electrical feeding points of the radiation element.

[0038] In one embodiment, when the feed is powered, the reference ground is electrically connected to the reference ground electrode, and each radiation element is electrically connected to the reference ground electrode in a state of being electrically connected to the reference ground at the physical center point of the radiation element.

[0039] In one embodiment, each of the radiating elements is electrically connected to the reference ground through a metallized via structure at the physical center point of the radiating element.

[0040] In one embodiment, the number of the radiating elements is one.

[0041] In one embodiment, the two electrical feeding points of the radiating element are respectively set as one feeding connection point through a point feeding structure, that is, the radiating element is arranged such that the first excitation signal is accessed at one of the feeding connection points, and the second excitation signal is accessed at the other feeding connection point. Corresponding to the two electrical feeding points, they are respectively equivalent to being located at the two feeding connection points. Then, the radiating element is symmetric about the line connecting the two feeding connection points, and the midpoint of the line connecting the two feeding connection points is located at the physical center point of the radiating element.

[0042] In one embodiment, the radiating element is set as a rectangular sheet-shaped conductive layer, and the line connecting the two feeding connection points is perpendicular to two opposite sides of the radiating element.

[0043] In one embodiment, the radiating element is set as a circular sheet-shaped conductive layer.

[0044] In one embodiment, a straight line passing through the physical center point of the radiating element and perpendicular to the line connecting the two electrical feeding points on the radiating element is defined as the zero potential line of the radiating element. The two sides of the radiating element located on the zero potential line are concavely arranged in the direction towards the physical center point of the radiating element.

[0045] In one embodiment, the electrical feeding point of the radiating element corresponding to accessing the first excitation signal is set as two feeding connection points through a point feeding structure, that is, the radiating element is arranged such that the first excitation signal is accessed at the two feeding connection points simultaneously. The midline of the line connecting the two feeding connection points passes through the physical center point of the radiating element, and the corresponding electrical feeding point is equivalent to being located at the midpoint of the line connecting the two feeding connection points.

[0046] In one embodiment, the electrical feeding point of the radiating element corresponding to accessing the second excitation signal is set as one feeding connection point through a point feeding structure, that is, the radiating element is arranged such that the second excitation signal is accessed at this one feeding connection point, and the corresponding electrical feeding point is equivalent to being located at this one feeding connection point.

[0047] In one embodiment, the electrical feeding point of the radiation element corresponding to the second excitation signal is set as two feeding connection points in a point feeding structure, that is, the radiation element is arranged such that the second excitation signal is simultaneously accessed at these two feeding connection points. The midline of the connection line of these two feeding connection points passes through the physical center point of the radiation element, and correspondingly, the electrical feeding point is equivalently located at the midpoint of the connection line of these two feeding connection points.

[0048] In one embodiment, the electrical feeding point of the radiation element corresponding to the first excitation signal is set in a microstrip feeding structure. The radiation element is connected to the first excitation signal through a microstrip feeding line electrically connected to the radiation element, that is, the electrical feeding point of the radiation element corresponding to the first excitation signal is equivalently located at the point on the radiation element electrically connected to the microstrip feeding line.

[0049] In one embodiment, the electrical feeding point of the radiation element corresponding to the second excitation signal is set in a microstrip feeding structure. The radiation element is connected to the second excitation signal through another microstrip feeding line electrically connected to the radiation element, that is, the electrical feeding point of the radiation element corresponding to the second excitation signal is equivalently located at the point on the radiation element electrically connected to this microstrip feeding line.

[0050] In one embodiment, the radiation element is hollowed out along the microstrip feeding line to form an adjustment of the position of the corresponding electrical feeding point in the direction towards the physical center point of the radiation element.

[0051] In one embodiment, the electrical feeding point of the radiation element corresponding to the second excitation signal is set as one feeding connection point in a point feeding structure, that is, the radiation element is arranged to access the second excitation signal at the feeding connection point, and correspondingly, the electrical feeding point is equivalently located at the feeding connection point.

[0052] In one embodiment, the electrical feeding point of the radiation element corresponding to the second excitation signal is set in an edge feeding structure. The radiation element is connected to the second excitation signal through an edge feeder, where the edge feeder is a microstrip line adjacent to and parallel to the straight edge of the radiation element, and correspondingly, the electrical feeding point is equivalently located at the midpoint of the edge feeder.

[0053] In one embodiment, the electrical feeding point of the radiation element corresponding to the first excitation signal is set in an edge feeding structure. The radiation element is connected to the first excitation signal through an edge feeder, where the edge feeder is a microstrip line adjacent to and parallel to the straight edge of the radiation element, and correspondingly, the electrical feeding point is equivalently located at the midpoint of the edge feeder.

[0054] In one embodiment, the number of the radiating elements is at least two. A straight line passing through the physical center point of the radiating element and perpendicular to the connection line of the two electrical feeding points on the radiating element is defined as the zero potential line of the radiating element, and each of the radiating elements is adjacently arranged in a state where the zero potential lines coincide.

[0055] In one embodiment, for two adjacent radiating elements, the direction from the electrical feeding point corresponding to the first excitation signal access to the electrical feeding point corresponding to the second excitation signal access is opposite.

[0056] In one embodiment, for each of the radiating elements, the direction from the electrical feeding point corresponding to the first excitation signal access to the electrical feeding point corresponding to the second excitation signal access is the same.

[0057] In one embodiment, each of the radiating elements is arranged on the same side of the zero potential line and is respectively connected to the first excitation signal through a microstrip feeding line, and on the other side of the zero potential line and is respectively connected to the second excitation signal through another microstrip feeding line. The microstrip feeding lines corresponding to the first excitation signal access of each of the radiating elements are electrically connected and arranged with equal lengths, and the microstrip feeding lines corresponding to the second excitation signal access of each of the radiating elements are electrically connected and arranged with equal lengths.

[0058] In one embodiment, the number of the radiating elements is two, and the two radiating elements are arranged in a state where the connection line of the two electrical feeding points of the radiating elements is perpendicular to each other.

[0059] In one embodiment, the number of the radiating elements is at least two, and the radiating elements are adjacently arranged in a state where the connection lines of the two electrical feeding points of each of the radiating elements coincide, that is, each of the radiating elements is adjacently arranged in a state where the electrical feeding points are located on the same straight line.

[0060] In one embodiment, for each of the radiating elements, the direction from the electrical feeding point corresponding to the first excitation signal access to the electrical feeding point corresponding to the second excitation signal access is the same, and each of the radiating elements has the same polarization direction.

[0061] In one embodiment, two electrical feeding points located on different radiating elements and adjacent to each other among two adjacent radiating elements are electrically connected. In this way, when the first excitation signal and the second excitation signal are respectively accessed at the two electrical feeding points at both ends of the connection line of each of the electrical feeding points, a state where each of the radiating elements has the same polarization direction can be formed.

[0062] In one embodiment, two electrical feeding points that are located on different radiating elements and are adjacent to each other among two adjacent radiating elements are arranged and electrically connected in a microstrip feeding structure. Correspondingly, two adjacent radiating elements are electrically connected by a microstrip feeding line, and the points electrically connected to the microstrip feeding line on the two adjacent radiating elements respectively equivalently form the electrical feeding points, so as to form a state where two electrical feeding points that are located on different radiating elements and are adjacent to each other among two adjacent radiating elements are electrically connected.

[0063] In one embodiment, two electrical feeding points of each radiating element are arranged in a microstrip feeding structure. Correspondingly, each radiating element is respectively connected to the first excitation signal through a microstrip feeding line electrically connected to the radiating element, and is connected to the second excitation signal through another microstrip feeding line electrically connected to the radiating element. The two electrical feeding points of the corresponding radiating element are equivalently located at the points on the radiating element that are electrically connected to the two microstrip feeding lines. Among them, the microstrip feeding lines corresponding to each radiating element for accessing the first excitation signal are electrically connected and arranged with equal length, and the microstrip feeding lines corresponding to each radiating element for accessing the second excitation signal are electrically connected and arranged with equal length. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 It is a schematic structural diagram of an existing microwave detection module adopting a transceiver integrated design.

[0065] Figure 2 It is a schematic circuit principle diagram of an inverting dual-fed microwave detection module according to an embodiment of the present invention.

[0066] Figure 3 It is a schematic structural diagram of the inverting dual-fed microwave detection module according to the above embodiment of the present invention.

[0067] Figure 4 It is a schematic structural diagram of the inverting dual-fed microwave detection module according to a variant embodiment of the above embodiment of the present invention.

[0068] Figure 5 It is a schematic structural diagram of the inverting dual-fed microwave detection module according to another variant embodiment of the above embodiment of the present invention.

[0069] Figure 6 It is a schematic structural diagram of the inverting dual-fed microwave detection module according to another variant embodiment of the above embodiment of the present invention.

[0070] Figure 7 It is a schematic structural diagram of the inverting dual-fed microwave detection module according to another variant embodiment of the above embodiment of the present invention.

[0071] Figure 8Schematic diagram of the inverting dual-feed microwave detection module according to another variant embodiment of the above-described embodiment of the present invention.

[0072] Figure 9 Schematic diagram of the inverting dual-feed microwave detection module according to another variant embodiment of the above-described embodiment of the present invention.

[0073] Figure 10 Schematic diagram of the inverting dual-feed microwave detection module according to another variant embodiment of the above-described embodiment of the present invention.

[0074] Figure 11 Schematic diagram of the inverting dual-feed microwave detection module according to another variant embodiment of the above-described embodiment of the present invention.

[0075] Figure 12A Schematic diagram of the inverting dual-feed microwave detection module according to another variant embodiment of the above-described embodiment of the present invention.

[0076] Figure 12B Schematic diagram of the inverting dual-feed microwave detection module according to another variant embodiment of the above-described embodiment of the present invention.

[0077] Figure 12C Schematic diagram of the inverting dual-feed microwave detection module according to another variant embodiment of the above-described embodiment of the present invention.

[0078] Figure 13 Schematic diagram of the inverting dual-feed microwave detection module according to another variant embodiment of the above-described embodiment of the present invention.

[0079] Figure 14A Schematic diagram of the inverting dual-feed microwave detection module according to another variant embodiment of the above-described embodiment of the present invention.

[0080] Figure 14B Schematic diagram of the inverting dual-feed microwave detection module according to another variant embodiment of the above-described embodiment of the present invention.

[0081] Figure 14C Schematic diagram of the inverting dual-feed microwave detection module according to another variant embodiment of the above-described embodiment of the present invention.

[0082] Figure 15A Schematic diagram of the inverting dual-feed microwave detection module according to another variant embodiment of the above-described embodiment of the present invention.

[0083] Figure 15B Schematic diagram of the inverting dual-feed microwave detection module according to another variant embodiment of the above-described embodiment of the present invention.

[0084] Figure 15C It is a schematic structural diagram of the inverting dual-feed microwave detection module according to another variant embodiment of the above embodiment of the present invention.

[0085] Figure 15D It is a schematic structural diagram of the inverting dual-feed microwave detection module according to another variant embodiment of the above embodiment of the present invention.

[0086] Figure 16A It is a schematic structural diagram of the inverting dual-feed microwave detection module according to another variant embodiment of the above embodiment of the present invention.

[0087] Figure 16B It is a schematic structural diagram of the inverting dual-feed microwave detection module according to another variant embodiment of the above embodiment of the present invention.

[0088] Figure 16C It is a schematic structural diagram of the inverting dual-feed microwave detection module according to another variant embodiment of the above embodiment of the present invention. Detailed implementation manners

[0089] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variants. The basic principles defined in the following description can be applied to other implementation manners, variant schemes, improvement schemes, equivalent schemes, and other technical schemes that do not deviate from the spirit and scope of the present invention.

[0090] Those skilled in the art should understand that in the disclosure of the present invention, the orientation or positional relationships indicated by the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on the present invention.

[0091] It can be understood that the term "one" should be construed as "at least one" or "one or more". That is, in one embodiment, the number of one element can be one, while in other embodiments, the number of this element can be multiple. The term "one" should not be construed as a limitation on the number.

[0092] Referring to the accompanying drawings of the specification of the present invention Figure 2As shown, an inverting dual-fed microwave detection module according to an embodiment of the present invention is schematically shown, wherein the inverting dual-fed microwave detection module includes a radiation source 20 and a reference ground 10 arranged as a sheet-shaped conductive layer, wherein the radiation source 20 includes at least one radiation element 21 also arranged as a sheet-shaped conductive layer, wherein each of the radiation elements 21 is spaced apart from the reference ground 10 in a state where the planes of the two sheet-shaped conductive layers tend to be parallel, so that in a state where the radiation element 21 is excited and fed by a corresponding excitation signal, the radiation element 21 can interact with the reference ground 10 to emit a microwave beam corresponding to the frequency of the excitation signal, and / or receive a reflected echo formed by reflection of the microwave beam by a corresponding object and output an echo signal corresponding to the frequency of the reflected echo, so as to generate a Doppler intermediate frequency signal corresponding to the frequency / phase difference between the excitation signal and the echo signal by means of mixing and detection based on the Doppler effect principle in the subsequent stage, and the Doppler intermediate frequency signal is a feedback on the activity of the corresponding object, wherein based on the physical feeding structure of the radiation element 21 in the fed state, each of the radiation elements 21 is equivalently provided with two electrical feeding points 211, wherein the connection line of the two electrical feeding points 211 of the radiation element 21 passes through the physical center point of the radiation element 21, and wherein the radiation element 21 is inverting dual-fed by applying a first excitation signal and a second excitation signal opposite in phase to the first excitation signal to the two electrical feeding points 211 of each of the radiation elements 21 respectively, so that in a state where the radiation element 21 is inverting dual-fed, a zero potential point of the radiation element 21 is formed at the physical center point of the radiation element 21, thereby facilitating suppression of polarization balance mismatch caused by the shape design and processing error of the radiation element 21, and further improving the radiation efficiency of the inverting dual-fed microwave detection module in a manner of balancing and ensuring the potential distribution intensity of the radiation element 21 in the fed state, and correspondingly improving the accuracy of the inverting dual-fed microwave detection module.

[0093] It is worth mentioning that in the state where the connection line of the two electrical feeding points 211 of the radiation element 21 passes through the physical center point of the radiation element 21, based on the design of the corresponding matching network electrically connected to the two electrical feeding points 211, a zero-potential point of the radiation element 21 can be formed at the physical center point of the radiation element 21 in the state where the radiation element 21 is fed with opposite-phase dual feeds. That is to say, the opposite-phase state of the first excitation signal and the second excitation signal corresponds to the distribution of the first excitation signal and the second excitation signal bounded by the zero point of a cycle of the excitation signal, without restricting the absolute amplitudes of the first excitation signal and the second excitation signal to be the same. That is, in the state where the connection line of the two electrical feeding points 211 of the radiation element 21 passes through the physical center point of the radiation element 21, the two electrical feeding points 211 are not restricted to be symmetric about the physical center point of the radiation element 21, and based on the design of the corresponding matching network, a zero-potential point of the radiation element 21 can be formed at the physical center point of the radiation element 21 in the state where the radiation element 21 is fed with opposite-phase dual feeds. Therefore, the circuit design of the corresponding opposite-phase dual-feed microwave detection module is flexible and diverse and can adapt to different layout requirements.

[0094] Particularly, due to the shape design and processing error of the radiation element 21, in the description of the present invention, the understanding that the connection line of the two electrical feeding points 211 of the radiation element 21 passes through the physical center point of the radiation element 21 should be interpreted as the connection line sequentially connecting one of the electrical feeding points 211, the physical center point of the radiation element 21, and the other electrical feeding point 211 tending to be a straight line with an included angle greater than or equal to 170 degrees at the physical center point of the radiation element 21.

[0095] Furthermore, in the state where the connection line of the two electrical feeding points 211 of the radiation element 21 passes through the physical center point of the radiation element 21, preferably, the midpoint of the connection line of the two electrical feeding points 211 is located at the physical center point of the radiation element 21. That is, in the state where the connection line of the two electrical feeding points 211 of the radiation element 21 passes through the physical center point of the radiation element 21, the two electrical feeding points 211 are symmetric about the physical center point of the radiation element 21. This is beneficial to simplify the design of the corresponding matching network and ensure that the zero-potential point of the radiation element 21 is formed at the physical center point of the radiation element 21 in the state where the radiation element 21 is fed with opposite-phase dual feeds, thereby being beneficial to further suppressing the polarization balance mismatch caused by the shape design and processing error of the radiation element 21, and further improving the radiation efficiency of the opposite-phase dual-feed microwave detection module in a way of balancing and ensuring the potential distribution intensity of the radiation element 21 in the fed state, and correspondingly improving the accuracy of the opposite-phase dual-feed microwave detection module.

[0096] Preferably, the radiation element 21 is further arranged to be symmetric about the line connecting the two electrical feeding points 211, so as to further suppress the polarization balance mismatch caused by the shape design of the radiation element 21 in the state where the radiation element 21 is fed with reverse-phase dual feeding, and further improve the radiation efficiency of the reverse-phase dual-fed microwave detection module in a manner of balancing and ensuring the potential distribution intensity of the radiation element 21 in the fed state, and correspondingly improve the accuracy of the reverse-phase dual-fed microwave detection module.

[0097] Furthermore, the reverse-phase dual-fed microwave detection module includes a feed source 30, wherein the feed source 30 is arranged as a signal source that allows power supply and outputs the first excitation signal and the second excitation signal that is opposite in phase to the first excitation signal with the positive pole or the ground pole of the corresponding power supply as the reference ground pole.

[0098] It can be understood that the feed source 30 outputs the first excitation signal and the second excitation signal to the two electrical feeding points 211 of the radiation element 21 through a corresponding matching network. The design of the matching network has diverse structures and parameter designs to meet the corresponding impedance matching in the actual circuit, including but not limited to the matching network composed of at least one of microstrip lines, inductors, and capacitors. Moreover, the influence of the matching network on the phases of the first excitation signal and the second excitation signal does not change the reverse-phase state of the first excitation signal and the second excitation signal, that is, it does not change the distribution state of the first excitation signal and the second excitation signal with the zero point of a periodic excitation signal in time as the boundary. Therefore, the introduction of the matching circuit is only used to explain the access of the first excitation signal to the radiation element 21 at one of the electrical feeding points 211 and the access of the second excitation signal to the radiation element 21 at the other electrical feeding point 211 in the actual circuit. The corresponding electrical connection relationship between the radiation element 21 at the two electrical feeding points 211 and the feed source 30 in the actual circuit includes the electrical connection between the radiation element 21 at the two electrical feeding points 211 and the feed source 30 through a corresponding microstrip circuit and / or electronic components, without restricting the description and schematic diagram of the principle electrical connection relationship that the radiation element 21 accesses the first excitation signal at one of the electrical feeding points 211 and accesses the second excitation signal that is opposite in phase to the first excitation signal at the other electrical feeding point 211. The specific structure and parameter design of the matching network do not constitute a limitation to the present invention.

[0099] In particular, in this embodiment of the present invention, in a state where each of the radiating elements 21 is connected to the first excitation signal at one of the electrical feeding points 211 and to the second excitation signal at the other electrical feeding point 211 and is fed in a reverse-phase dual-feed manner, at least one of the radiating elements 21 is electrically connected to the reference ground electrode at the physical center point of the radiating element 21. Preferably, each of the radiating elements 21 is electrically connected to the reference ground electrode at the physical center point of the radiating element 21, so that a closed-loop circuit for the first excitation signal and the second excitation signal is formed between the two electrical feeding points 211 of the corresponding radiating element 21 and the physical center point of the radiating element 21, thereby reducing the impedance of the reverse-phase dual-feed microwave detection module at frequencies deviating from the resonant operating point, correspondingly narrowing the bandwidth of the reverse-phase dual-feed microwave detection module and being beneficial to improving the anti-interference performance of the reverse-phase dual-feed microwave detection module.

[0100] That is to say, in the state where the radiating element 21 is fed in a reverse-phase dual-feed manner, based on the potential distribution relationship that the physical center point of the radiating element 21 is the zero-potential point of the radiating element 21, by connecting the physical center point of the radiating element 21 to the reference ground electrode, the potential distribution of the radiating element 21 can be maintained and the radiation efficiency of the reverse-phase dual-feed microwave detection module can be maintained. That is, based on the structural design that the radiating element 21 is symmetric about the line connecting the two electrical feeding points 211 and the midpoint of the line connecting the two electrical feeding points 211 is located at the physical center point of the radiating element 21, the electrical connection between the physical center point of the radiating element 21 and the reference ground electrode can avoid energy loss caused by physical short-circuit and maintain the radiation efficiency of the reverse-phase dual-feed microwave detection module, and at the same time improve the anti-interference performance of the reverse-phase dual-feed microwave detection module.

[0101] Further, the feed source 30 has a three-terminal transistor 31 configured as a triode or a field-effect transistor. In a state where the three-terminal transistor 31 is configured as a triode, each of the radiating elements 21 is electrically coupled to the emitter or base of the triode at one of the electrical feeding points 211, and is electrically coupled to the collector of the triode at the other electrical feeding point 211. In a state where the three-terminal transistor 31 is configured as a field-effect transistor, each of the radiating elements 21 is electrically coupled to the source or gate of the field-effect transistor at one of the electrical feeding points 211, and is electrically coupled to the drain of the field-effect transistor at the other electrical feeding point 211. Thus, in a state where the feed source 30 is powered, a principle electrical connection relationship is formed in which the radiating element 21 accesses the first excitation signal at one of the electrical feeding points 211 and accesses the second excitation signal that is in antiphase with the first excitation signal at the other electrical feeding point 211, thereby realizing antiphase dual feeding of the radiating element 21.

[0102] Specifically, in this embodiment of the present invention, the three-terminal transistor 31 is configured as a triode. Each of the radiating elements 21 is electrically coupled to the collector of the triode through an equivalent capacitor C1 at one of the electrical feeding points 211, and is electrically coupled to the emitter of the triode through another equivalent capacitor C2 at the other electrical feeding point 211. It can be understood that the equivalent capacitor C1 and the equivalent capacitor C2 are circuits or electronic components having capacitance characteristics under the first excitation signal and the second excitation signal at corresponding frequencies, including but not limited to microstrip distributed capacitance and capacitor elements, and the present invention is not limited thereto.

[0103] It is worth mentioning that, in this embodiment of the present invention, to fully demonstrate the present invention, a circuit principle of the feed source 30 is partially schematically shown in the form of an analog circuit. The feed source 30 partially schematically shown in the form of an analog circuit is only for schematically showing the circuit principle of the feed source 30 and does not constitute a limitation on the circuit form of the feed source 30. In some embodiments of the present invention, the feed source 30 is implemented as an oscillation circuit having the three-terminal transistor 31 in the form of an analog circuit. In other embodiments of the present invention, the feed source 30 is allowed to be arranged in the form of an integrated circuit or a semi-integrated circuit, and the present invention is not limited thereto.

[0104] Exemplarily, in some embodiments of the present invention, the feed source 30 is designed in the form of an integrated circuit and is provided as a microwave chip integrated with the three-terminal transistor 31, where the microwave chip has two emission terminals. When the three-terminal transistor 31 is configured as a triode, the two emission terminals of the microwave chip are electrically coupled to the collector and emitter of the triode respectively. When the three-terminal transistor 31 is configured as a field-effect transistor, the two emission terminals of the microwave chip are electrically coupled to the source and drain of the field-effect transistor respectively, so as to output the first excitation signal at one of the emission terminals and output the second excitation signal that is opposite in phase to the first excitation signal at the other emission terminal.

[0105] In some other embodiments of the present invention, the feed source 30 is designed in the form of a semi-integrated circuit and is provided as a microwave chip externally connected with the three-terminal transistor 31, where the microwave chip has an emission terminal corresponding to output the first excitation signal. When the three-terminal transistor 31 is configured as a triode, the emission terminal of the microwave chip is electrically coupled to the base or emitter of the triode, so as to output the first excitation signal at the emission terminal and output the second excitation signal at the collector of the triode. When the three-terminal transistor 31 is configured as a field-effect transistor, the emission terminal of the microwave chip is electrically coupled to the gate or source of the field-effect transistor, so as to output the first excitation signal at the emission terminal and output the second excitation signal at the drain of the field-effect transistor.

[0106] It can be understood that the feed source 30 is provided to be powered and output the first excitation signal and the second excitation signal that is opposite in phase to the first excitation signal with the positive electrode or the ground electrode of the corresponding power supply as the reference ground electrode. The feed source 30 has various implementation manners based on different circuit principles and circuit forms, and the present invention does not limit this. In some embodiments of the present invention, the feed source 30 is provided as a microwave chip having two emission terminals, where the microwave chip is provided to output the first excitation signal at one of the emission terminals and output the second excitation signal at the other emission terminal, and the circuit principle of the corresponding microwave chip is diverse, and is not limited to the circuit principle that the two emission terminals are respectively electrically coupled to the collector and emitter of the triode.

[0107] Furthermore, in this embodiment of the present invention, in the state where the radiation element 21 is fed in a reverse-phase dual-feed manner, the reference ground 10 is electrically connected to the reference ground electrode, and each of the radiation elements 21 is electrically connected to the reference ground 10 through a metallized via structure at the physical center point of the radiation element 21, so as to form a relationship in which the radiation element 21 is electrically connected to the reference ground electrode at the physical center point. Therefore, it is simple and easy to implement and will not cause congestion in the circuit layout, which is beneficial to improving the anti-interference performance of the reverse-phase dual-feed microwave detection module and its adaptability to the current miniaturization trend.

[0108] Particularly, in this embodiment of the present invention, the reverse-phase dual-feed microwave detection module is designed for integrated transceiver and further includes a microstrip mixer 40. Among them, the radiation element 21 is electrically coupled to the three-terminal transistor 31 through the microstrip mixer 40 at one of the electrical feeding points 211, so as to realize the reception of the corresponding echo signal at this electrical feeding point 211 and achieve the integrated transceiver design of the reverse-phase dual-feed microwave detection module, which is beneficial to improving the adaptability of the reverse-phase dual-feed microwave detection module to the current miniaturization trend.

[0109] It is worth mentioning that in the above description of the present invention, the description of the position of the electrical feeding point 211 is a limitation on the electrical equivalent feeding position of the radiation element 21. The physical feeding implementation structures of the electrical feeding points 211 are diverse, and the physical feeding structures corresponding to the two electrical feeding points 211 of the same radiation element 21 are not restricted to be the same. Therefore, the circuit design of the corresponding reverse-phase dual-feed microwave detection module is flexible and diverse and can adapt to different layout requirements.

[0110] Specifically, referring to the accompanying drawings of the specification of the present invention Figures 3 to 16C, the inverted dual-fed microwave detection module according to different embodiments of the present invention is schematically shown, wherein the electrical connection relationship between the two electrical feeding points 211 and the three-terminal transistor 31 can be interchanged. Taking the electrical feeding point 211 accessing the first excitation signal as an example, in the state of the point feeding (probe feeding) structure corresponding to this electrical feeding point 211, when the radiation element 21 is implemented with a feeding connection point 2111 deviating from the physical center point of the radiation element 21 on the radiation element 21 accessing the first excitation signal, this electrical feeding point 211 takes the feeding connection point 2111. And when the radiation element 21 is implemented with two feeding connection points 2111 deviating from the physical center point of the radiation element 21 on the radiation element 21 accessing the first excitation signal, the electrical equivalent feeding point of the radiation element 21 is located at the midpoint of the connection line of the two feeding connection points 2111, and the positional relationship between the two feeding connection points 2111 should be set to satisfy that the midline of the connection line of the two feeding connection points 2111 passes through the physical center point of the radiation element 21, that is, this electrical feeding point 211 takes the midpoint of the connection line of the two feeding connection points 2111; in the state of the microstrip feeding structure corresponding to this electrical feeding point 211, the radiation element 21 accesses the first excitation signal through a microstrip feeding line 212, wherein this electrical feeding point 211 of the radiation element 21 is electrically equivalent to the point electrically connected to the microstrip feeding line 212 on the radiation element 21; in the state of the edge feeding structure corresponding to this electrical feeding point 211, the radiation element 21 accesses the first excitation signal through an edge feeding line 213, wherein the edge feeding line 213 is a microstrip line adjacent to and parallel to the straight edge of the radiation element 21, and this electrical feeding point 211 of the radiation element 21 is electrically equivalent to the midpoint of the edge feeding line 213 set as a microstrip line, that is, the description of the electrical connection relationship and position of this electrical feeding point 211 is a limitation on the electrical connection relationship of the physical edge feeding line 213 and the midpoint position of the edge feeding line 213, and the specific position where the edge feeding line 213 accesses the first excitation signal is not limited and does not affect the definition of the position of this electrical feeding point 211.

[0111] That is to say, the radiation element 21 equivalently has one electrical feeding point 211 corresponding to accessing the first excitation signal and another electrical feeding point 211 corresponding to accessing the second excitation signal, wherein the two electrical feeding points 211 can be interchanged. Therefore, the physical feeding structures corresponding to the electrical feeding point 211 are diverse, and the physical feeding structures corresponding to the two electrical feeding points 211 of the same radiation element 21 are not restricted to be the same. At the same time, the quantity and shape of the radiation element 21 are set flexibly and diversely. Therefore, the circuit design of the inverted dual-fed microwave detection module is flexible and diverse and can adapt to different layout requirements.

[0112] Exemplarily, referring to the accompanying drawings of the specification of the present invention Figure 3 as shown, in the state where the corresponding point feeding (probe feeding) structure is at the electrical feeding point 211 and the number of the radiation elements 21 is one, corresponding to Figure 2 as shown in the schematic embodiment, the structure of the in-phase double-fed microwave detection module is schematically shown. In this embodiment of the present invention, the radiation element 21 is arranged as a rectangular sheet-shaped conductive layer, where the radiation element 21 is symmetric about the connection line of the two electrical feeding points 211, and on the basis that the midpoint of the connection line of the two electrical feeding points 211 is located at the physical center point of the radiation element 21, the radiation element 21 is further arranged to satisfy that the connection line of the two electrical feeding points 211 is perpendicular to the two opposite sides of the radiation element 21.

[0113] Specifically, in this embodiment of the present invention, the number of the radiation elements 21 of the in-phase double-fed microwave detection module is one, where the radiation element 21 is implemented by accessing the first excitation signal at one feeding connection point 2111 deviating from the physical center point of the radiation element 21 on the radiation element 21 and accessing the second excitation signal at another feeding connection point 2111. That is, taking the two feeding connection points 2111 as the corresponding two electrical feeding points 211, based on the description of the positional relationship of the two electrical feeding points 211 of the aforementioned radiation element 21, the radiation element 21 is symmetric about the connection line of the two feeding connection points 2111, and the midpoint of the connection line of the two feeding connection points 2111 is located at the physical center point of the radiation element 21, and the connection line of the two feeding connection points 2111 is perpendicular to the two opposite sides of the radiation element 21.

[0114] It is worth mentioning that corresponding to Figure 3 the in-phase double-fed microwave detection module shown in the schematic, in the structural state where the radiation element 21 is implemented by accessing the first excitation signal at one feeding connection point 2111 deviating from the physical center point of the radiation element 21 on the radiation element 21 and accessing the second excitation signal at another feeding connection point 2111, taking the straight line passing through the physical center point of the radiation element 21 and perpendicular to the connection line of the two feeding connection points 2111 on the radiation element 21 as the zero potential line of the radiation element 21, where on the connection line of the two feeding connection points 211, one or more additional feeding connection points 2111 provided are structurally corresponding to the further design based on the structure of the in-phase double-fed microwave detection module shown in Figure 3 the schematic and belong to the present invention, and in principle, based on the corresponding impedance matching and the feeding connection points 2111 on the same side of the zero potential line equivalently forming an electrical feeding point 211 on this connection line, also belong to the present invention.

[0115] That is to say, on the same side of the zero potential line of the radiation element 21, multiple feeding connection points 2111 located on the connection line between the two electrical feeding points 211 and / or the feeding connection points 2111 symmetrically distributed with respect to the connection line between the two electrical feeding points 211 can be equivalent to the corresponding electrical feeding points 211 based on corresponding impedance matching, and the present invention does not limit this.

[0116] Further referring to FIGS. Figure 4 and Figure 5 shown in the specification drawings of the present invention, in the state of the point feeding (probe feeding) structure corresponding to the electrical feeding point 211, based on the number setting of the feeding connection points 2111, two modified embodiments of the in-phase dual-feed microwave detection module corresponding to the embodiment shown in Figure 3 are respectively schematically shown.

[0117] Corresponding to Figure 4 the in-phase dual-feed microwave detection module shown in the figure, the radiation element 21 is implemented such that two feeding connection points 2111 deviating from the physical center point of the radiation element 21 on the radiation element 21 are simultaneously connected to the first excitation signal, and another feeding connection point 2111 deviating from the physical center point of the radiation element 21 on the radiation element 21 is connected to the second excitation signal, wherein the positional relationship between the two feeding connection points 2111 corresponding to the connection of the first excitation signal is set such that the midline of the connection line between the two feeding connection points 2111 passes through the physical center point of the radiation element 21. Then, for the electrical feeding point 211 corresponding to the connection of the first excitation signal, the midpoint of the connection line between the two feeding connection points 2111 connected to the first excitation signal is taken, and for the electrical feeding point 211 corresponding to the connection of the second excitation signal, the other feeding connection point 2111 connected to the second excitation signal is taken, and the positional relationship among the three feeding connection points 2111 satisfies: the radiation element 21 is symmetric with respect to the connection line between the two electrical feeding points 211, and the midpoint of the connection line between the two electrical feeding points 211 is located at the physical center point of the radiation element 21.

[0118] It is worth mentioning that based on the reciprocity of the two electrical feeding points 211, the electrical feeding point 211 corresponding to the connection of the first excitation signal and the electrical feeding point 211 corresponding to the connection of the second excitation signal can be reciprocal, that is to say, corresponding to Figure 4In the illustrated in-phase dual-feed microwave detection module, the electrical connection relationship between the two feed connection points 2111 for accessing the first excitation signal and the other feed connection point 2111 for accessing the second excitation signal can be interchanged. Correspondingly, the two feed connection points 2111 originally used to access the first excitation signal are used to access the second excitation signal, and the other feed connection point 2111 originally used to access the second excitation signal is used to access the first excitation signal.

[0119] Corresponding to Figure 5 In the illustrated in-phase dual-feed microwave detection module, the two feed connection points 2111 on the radiating element 21 that deviate from the physical center point of the radiating element 21 are simultaneously connected to the first excitation signal, and the other two feed connection points 2111 on the radiating element 21 that deviate from the physical center point of the radiating element 21 are simultaneously connected to the second excitation signal. The positional relationship of the two feed connection points 2111 for accessing the first excitation signal is set such that the midline of the line connecting the two feed connection points 2111 passes through the physical center point of the radiating element 21. Then, the electrical feed point 211 corresponding to the access of the first excitation signal is taken as the midpoint of the line connecting the two feed connection points 2111 for accessing the first excitation signal. The positional relationship of the other two feed connection points 2111 for accessing the second excitation signal is set such that the midline of the line connecting the two feed connection points 2111 passes through the physical center point of the radiating element 21. Then, the electrical feed point 211 corresponding to the access of the second excitation signal is taken as the midpoint of the line connecting the two feed connection points 2111 for accessing the second excitation signal. Moreover, the positional relationship of the four feed connection points 2111 satisfies that the radiating element 21 is symmetric about the line connecting the two electrical feed points 211, and the midpoint of the line connecting the two electrical feed points 211 is located at the physical center point of the radiating element 21.

[0120] Further referring to FIGS. Figure 6 and 7 shown, in the state of the point feed (probe feed) structure corresponding to the electrical feed point 211, based on the shape setting of the radiating element 21, corresponding to Figure 3 the in-phase dual-feed microwave detection modules of two modified embodiments corresponding to the illustrated embodiment are respectively shown.

[0121] Corresponding to Figure 6 , in this modified embodiment of the present invention, the radiating element 21 is set as a circular sheet-shaped conductive layer, then the physical center point of the radiating element 21 is located at the center of the circular sheet-shaped conductive layer. Corresponding to Figure 7, taking the straight line passing through the physical center point of the radiating element 21 and perpendicular to the connection line of the two electrical feeding points 211 on the radiating element 21 as the zero potential line of the radiating element 21. In this variant embodiment of the present invention, the two sides of the radiating element 21 located on the zero potential line are concavely arranged in the direction towards the physical center point of the radiating element 21, so as to maintain an appropriate perimeter of the radiating element 21 while ensuring the gain of the in-phase dual-feed microwave detection module, and it is beneficial to reduce the size of the in-phase dual-feed microwave detection module by reducing the size of the radiating element 21 to adapt to the current miniaturization trend.

[0122] It can be understood that, in some embodiments of the present invention, the radiating element 21 can also be implemented as a sheet-shaped conductive layer in other symmetric forms, such as an ellipse, or a shape with chamfers at the four corners of a rectangle on the basis of a rectangle. The present invention does not limit this.

[0123] Further referring to the accompanying drawings of the specification of the present invention Figures 8 to 11 as shown, on the basis that the number of the radiating elements 21 is one, based on the entity physical feeding structure corresponding to the electrical feeding points 211, the in-phase dual-feed microwave detection modules corresponding to different variant embodiments of the embodiment shown Figure 3 are respectively illustrated.

[0124] Corresponding to Figure 8 , in this variant embodiment of the present invention, the radiating element 21 is arranged to access the first excitation signal and the second excitation signal with a microstrip feeding structure. Specifically, the radiating element 21 accesses the first excitation signal through a microstrip feeding line 212 and accesses the second excitation signal through another microstrip feeding line 212. The points on the radiating element 21 electrically connected to the microstrip feeding lines 212 are taken as the corresponding electrical feeding points 211. Then, based on the symmetry of the radiating element 21 with respect to the connection line of the two electrical feeding points 211 and the position relationship that the midpoint of the connection line of the two electrical feeding points 211 is located at the physical center point of the radiating element 21, the radiating element 21 and the two microstrip feeding lines 212 are arranged to satisfy: the radiating element 21 is symmetric with respect to the connection line of the two points on the radiating element 21 electrically connected to the two microstrip feeding lines 212, and the midpoint of the connection line of the two points on the radiating element 21 electrically connected to the two microstrip feeding lines 212 is located at the physical center point of the radiating element 21.

[0125] It is worth mentioning that, in order to adjust the position of the corresponding electrical feeding point 211 to meet the corresponding impedance matching requirements, the radiating element 21 allows to be hollowed out along the microstrip feeding line 212 and the position of the corresponding electrical feeding point 211 is adjusted by extending the microstrip feeding line 212 in the direction towards the physical center point of the radiating element 21.

[0126] corresponding to Figure 9 In this variant embodiment of the present invention, the radiation element 21 is combined and connected to the first excitation signal and the second excitation signal in a point feeding (probe feeding) structure and a microstrip feeding structure respectively. For example, in the point feeding (probe feeding) structure, the first excitation signal is connected to one of the feeding connection points 2111, and in the microstrip feeding structure, the second excitation signal is connected through one of the microstrip feeding lines 212; or in the microstrip feeding structure, the first excitation signal is connected through one of the microstrip feeding lines 212, and in the point feeding (probe feeding) structure, the second excitation signal is connected to one of the feeding connection points 2111. The present invention does not limit this.

[0127] corresponding to Figure 10 In this variant embodiment of the present invention, the radiation element 21 is arranged to access the first excitation signal and the second excitation signal in an edge feeding structure. Specifically, the radiation element 21 accesses the first excitation signal through one of the edge feeding lines 213 and accesses the second excitation signal through another edge feeding line 213. The edge feeding line 213 is a microstrip line adjacent to and parallel to the straight edge of the radiation element 21. That is to say, when the radiation element 21 is arranged to access the first excitation signal and the second excitation signal in the edge feeding structure, the corresponding edge of the radiation element 21 is limited to a straight edge. Taking the midpoint of the edge feeding line 213, which is set as a microstrip line, as the corresponding electrical feeding point 211, based on the symmetry of the radiation element 21 with respect to the connection line of the two electrical feeding points 211 and the positional relationship that the midpoint of the connection line of the two electrical feeding points 211 is located at the physical center point of the radiation element 21, the radiation element 21 and the two edge feeding lines 213 are arranged to satisfy: the radiation element 21 is symmetric with respect to the connection line of the midpoints of the two edge feeding lines 213, and the midpoint of the connection line of the midpoints of the two edge feeding lines 213 is located at the physical center point of the radiation element 21.

[0128] It is worth mentioning that in the state where the radiation element 21 is arranged to access the first excitation signal and the second excitation signal in the edge feeding structure, the electrical equivalent feeding point of the radiation element 21 is electrically equivalent to the midpoint of the edge feeding line 213, which is set as a microstrip line. That is, the electrical connection relationship and position description of the electrical feeding point 211 are the limitations of the electrical connection relationship and the midpoint position of the entity edge feeding line 213. The specific positions where the edge feeding line 213 accesses the first excitation signal and the second excitation signal are not limited and do not affect the limitation of the position of the electrical feeding point 211. Therefore, the circuit design of the corresponding in-phase double-feed microwave detection module is flexible and diverse and can adapt to different layout requirements.

[0129] corresponding to Figure 11, in this variant embodiment of the present invention, the radiation elements 21 are combined and connected to the first excitation signal and the second excitation signal in a point feeding (probe feeding) structure and an edge feeding structure respectively. For example, the first excitation signal is connected through a point feeding (probe feeding) structure at a feeding connection point 2111, and the second excitation signal is connected through an edge feeding structure via an edge feeder 213; or the first excitation signal is connected through an edge feeding structure via an edge feeder 213, and the second excitation signal is connected through a point feeding (probe feeding) structure at a feeding connection point 2111. The present invention does not limit this.

[0130] It can be understood that in some embodiments of the present invention, the radiation elements 21 are combined and connected to the first excitation signal and the second excitation signal in a microstrip feeding structure and an edge feeding structure respectively. For example, the first excitation signal is connected through a microstrip feeder 212 in a microstrip feeding structure, and the second excitation signal is connected through an edge feeder 213 in an edge feeding structure; or the first excitation signal is connected through an edge feeder 213 in an edge feeding structure, and the second excitation signal is connected through a microstrip feeder 212 in a microstrip feeding structure. The present invention does not limit this.

[0131] Further referring to the Figures 12A to 16C shown in the accompanying drawings of the specification of the present invention, the in-phase dual-feed microwave detection modules of different variant embodiments are respectively illustrated based on the feeding structure corresponding to the electrical feeding point 211 and the number setting of the radiation elements 21.

[0132] Specifically, corresponding to Figures 12A to 13 , where the number of the radiation elements 21 of the in-phase dual-feed microwave detection module is at least two, and each of the radiation elements 21 is adjacently arranged in a state where the zero potential lines coincide.

[0133] Corresponding to Figures 12A to 12C , the number of the radiation elements 21 is two. In a state where the two radiation elements 21 are adjacently arranged in a state where the zero potential lines coincide, the two radiation elements 21 are connected to the first excitation signal at the electrical feeding point 211 on the same side of the zero potential line, and are connected to the second excitation signal at the electrical feeding point 211 on the other side of the zero potential line. That is, the direction from the electrical feeding point 211 corresponding to the first excitation signal access of each radiation element 21 to the electrical feeding point 211 corresponding to the second excitation signal access is the same, and each radiation element 21 has the same polarization direction, so as to improve its gain while maintaining the planar beam angle of the in-phase dual-feed microwave detection module in the polarization direction.

[0134] It is worth mentioning that when the two radiation elements 21 are adjacently arranged in a state where the zero potential lines coincide, when the two radiation elements 21 have opposite polarization directions, that is, when the direction from the electrical feeding point 211 corresponding to the first excitation signal to the electrical feeding point 211 corresponding to the second excitation signal of each radiation element 21 is reversed, the planar beam angle of the in-phase dual-feed microwave detection module in the polarization direction can be expanded to adapt to the corresponding detection requirements. That is, when the two radiation elements 21 are adjacently arranged in a state where the zero potential lines coincide and the polarization directions are opposite, the planar beam angle of the in-phase dual-feed microwave detection module in the polarization direction can be expanded.

[0135] Further, in Figure 12A the in-phase dual-feed microwave detection module of the illustrated embodiment, the electrical feeding point 211 is arranged in a point feeding structure. Specifically, each radiation element 21 is connected to the first excitation signal through one feeding connection point 2111 and to the second excitation signal through another feeding connection point 2111.

[0136] Corresponding to Figure 12B and Figure 12C , the electrical feeding points 211 of each radiation element 21 on the same side of the zero potential line are electrically connected. That is, the direction from the electrical feeding point 211 corresponding to the first excitation signal to the electrical feeding point 211 corresponding to the second excitation signal of each radiation element 21 is the same, and each radiation element 21 has the same polarization direction. That is to say, each radiation element 21 is adjacently arranged in a state where the zero potential lines coincide in the same polarization direction, so as to improve its gain while maintaining the planar beam angle of the in-phase dual-feed microwave detection module in the polarization direction, thereby being beneficial to improving the detection sensitivity of the in-phase dual-feed microwave detection module.

[0137] Further, in Figure 12B the in-phase dual-feed microwave detection module of the illustrated embodiment, each radiation element 21 is arranged to access the first excitation signal and the second excitation signal with a microstrip feeding structure. Specifically, each radiation element 21 accesses the first excitation signal through a microstrip feeding line 212 on the same side of the zero potential line and accesses the second excitation signal through another microstrip feeding line 212 on the other side of the zero potential line. And the microstrip feeding lines 212 corresponding to the first excitation signal of each radiation element 21 are electrically connected, and the microstrip feeding lines 212 corresponding to the second excitation signal of each radiation element 21 are electrically connected. Corresponding to each radiation element 21 is adjacently arranged in a state where the zero potential lines coincide in the same polarization direction.

[0138] In Figure 12C In the inverting dual-fed microwave detection module of the illustrated embodiment, each of the radiating elements 21 is arranged to access the first excitation signal and the second excitation signal in an edge-fed structure. Specifically, each of the radiating elements 21 is respectively connected to the first excitation signal through an edge feeder 213 on the same side of the zero-potential line, and to the second excitation signal through another edge feeder 213 on the other side of the zero-potential line. And the edge feeders 213 corresponding to each of the radiating elements 21 for accessing the first excitation signal are electrically connected, and the edge feeders 213 corresponding to each of the radiating elements 21 for accessing the second excitation signal are electrically connected. The corresponding radiating elements 21 are adjacently arranged in a state where the zero-potential lines coincide in the same polarization direction.

[0139] Corresponding to Figure 13 , the number of the radiating elements 21 is five. Each of the radiating elements 21 is arranged to access the first excitation signal and the second excitation signal in a microstrip-fed structure. Specifically, each of the radiating elements 21 is respectively connected to the first excitation signal through a microstrip feeder 212 on the same side of the zero-potential line, and to the second excitation signal through another microstrip feeder 212 on the other side of the zero-potential line. And the microstrip feeders 212 corresponding to each of the radiating elements 21 for accessing the first excitation signal are electrically connected, and the microstrip feeders 212 corresponding to each of the radiating elements 21 for accessing the second excitation signal are electrically connected. This is beneficial to simplify the feeder line design of the radiation source 20, and in a state where the zero-potential lines of the two radiating elements 21 coincide, a state is formed where the two radiating elements 21 are adjacently arranged in the same polarization direction.

[0140] It is worth mentioning that in a state where the microstrip feeders 212 corresponding to each of the radiating elements 21 for accessing the first excitation signal are electrically connected, and the microstrip feeders 212 corresponding to each of the radiating elements 21 for accessing the second excitation signal are electrically connected, the microstrip feeders 212 corresponding to each of the radiating elements 21 for accessing the first excitation signal are preferably arranged to be of equal length, and the microstrip feeders 212 corresponding to each of the radiating elements 21 for accessing the second excitation signal are preferably arranged to be of equal length. This is beneficial to realize that the first excitation signal is in-phase accessed by each of the radiating elements 21, and the second excitation signal that is in-phase accessed and in antiphase with the first excitation signal, thereby ensuring the stability of the inverting dual-fed microwave detection module and improving the accuracy of the inverting dual-fed microwave detection module.

[0141] Corresponding to Figures 14A to 14C, wherein the number of the radiating elements 21 of the in-phase dual-feed microwave detection module is two, and the two radiating elements 21 are adjacently arranged in a state where the two zero-potential lines are perpendicular to each other. The connection lines of the two electrical feeding points 211 corresponding to each radiating element 21 are perpendicular to each other, that is, the two radiating elements 21 have a polarization relationship in an orthogonal state, so as to be conducive to improving the anti-interference performance of the in-phase dual-feed microwave detection module.

[0142] Corresponding to Figure 14A , each radiating element 21 is arranged to access the first excitation signal and the second excitation signal with a microstrip feeding structure. Specifically, each radiating element 21 is respectively connected to the first excitation signal through a microstrip feeding line 212 and connected to the second excitation signal through another microstrip feeding line 212, and the microstrip feeding lines 212 corresponding to each radiating element 21 for accessing the first excitation signal are electrically connected, and the microstrip feeding lines 212 corresponding to each radiating element 21 for accessing the second excitation signal are electrically connected, so as to be conducive to simplifying the feeding line design of the radiation source 20.

[0143] Corresponding to Figure 14B , each radiating element 21 is arranged to access the first excitation signal and the second excitation signal with an edge feeding structure. Specifically, each radiating element 21 is respectively connected to the first excitation signal through an edge feeding line 213 and connected to the second excitation signal through another edge feeding line 213, and the edge feeding lines 213 corresponding to each radiating element 21 for accessing the first excitation signal are electrically connected, and the edge feeding lines 213 corresponding to each radiating element 21 for accessing the second excitation signal are electrically connected, so as to be conducive to simplifying the feeding line design of the radiation source 20.

[0144] Corresponding to Figure 14C , each radiating element 21 is arranged to access the first excitation signal and the second excitation signal with a point feeding structure. Specifically, each radiating element 21 is respectively connected to the first excitation signal through a feeding connection point 2111 and connected to the second excitation signal through another electrical feeding point 2111.

[0145] It is worth mentioning that in Figures 14A to 14C the in-phase dual-feed microwave detection module of the corresponding embodiment, on the basis of the structure in which the two radiating elements 21 are adjacently arranged in a state where the two zero-potential lines are perpendicular to each other, the polarization relationship in an orthogonal state of the two radiating elements 21 has been formed. The electrical connection relationship between the two electrical feeding points 211 of the same radiating element 21 and the three-terminal transistor 31 can be interchanged without changing the polarization relationship in an orthogonal state of the two radiating elements 21, and the physical feeding structures corresponding to the electrical feeding points 211 are diverse, and the present invention does not limit this.

[0146] corresponding to Figures 15A to 16C wherein the number of the radiating elements 21 of the in-phase dual-fed microwave detection module is at least two, and each of the radiating elements 21 is adjacently arranged in a state where the connection lines of the two electrical feeding points 211 of each of the radiating elements 21 coincide, that is, each of the radiating elements 21 is adjacently arranged in a state where the electrical feeding points 211 are located on the same straight line.

[0147] Furthermore, the directions from the electrical feeding points 211 corresponding to each of the radiating elements 21 accessing the first excitation signal to the electrical feeding points 211 corresponding to accessing the second excitation signal are the same, and each of the radiating elements 21 has the same polarization direction, that is, each of the radiating elements 21 is adjacently arranged in a state where the electrical feeding points 211 are located on the same straight line, and each of the radiating elements 21 has the same polarization direction. In this way, the planar beam angle of the in-phase dual-fed microwave detection module in the direction of the connection lines of the electrical feeding points 211 can be reduced to adapt to the corresponding detection requirements, and at the same time, the gain of the in-phase dual-fed microwave detection module is improved.

[0148] corresponding to Figures 15A to 15D wherein the number of the radiating elements 21 is two, and in the Figure 15A in-phase dual-fed microwave detection module of the illustrated embodiment, the electrical feeding points 211 are arranged in a point feeding structure. Specifically, each of the radiating elements 21 is respectively connected to the first excitation signal through one feeding connection point 2111 and connected to the second excitation signal through one feeding connection point 2111, and the directions from the electrical feeding points 211 corresponding to each of the radiating elements 21 accessing the first excitation signal to the electrical feeding points 211 corresponding to accessing the second excitation signal are the same.

[0149] It is worth mentioning that when the two radiating elements 21 are adjacently arranged in a state where the connection lines of the electrical feeding points 211 coincide, when the two radiating elements 21 are arranged with opposite polarization directions, that is, when the directions from the electrical feeding points 211 corresponding to each of the radiating elements 21 accessing the first excitation signal to the electrical feeding points 211 corresponding to accessing the second excitation signal are opposite, the planar beam angle of the corresponding in-phase dual-fed microwave detection module in the direction of the connection lines of the electrical feeding points 211 can be expanded to adapt to the corresponding detection requirements.

[0150] corresponding to Figures 15B to 16B, in a state where the connection lines of the two electrical feeding points 211 of each of the radiation elements 21 coincide, two adjacent electrical feeding points 211 that are adjacent to each other on two adjacent radiation elements 21 are electrically connected, that is, two adjacent electrical feeding points 211 that are located on different radiation elements 21 and are adjacent to each other are electrically connected. In this way, when the first excitation signal and the second excitation signal are respectively connected to the two electrical feeding points 211 at both ends of the connection line of each of the electrical feeding points 211, a state can be formed in which each of the radiation elements 21 has the same polarization direction, and it is beneficial to simplify the feeding line design of the radiation source 20.

[0151] Specifically, in a state where the connection lines of the two electrical feeding points 211 of each of the radiation elements 21 coincide, two adjacent electrical feeding points 211 that are adjacent to each other on two adjacent radiation elements 21 are arranged and electrically connected in a microstrip feeding structure, that is, two adjacent radiation elements 21 are electrically connected by a microstrip feeding line 212, and the points on the two adjacent radiation elements 21 that are electrically connected to the microstrip feeding line 212 are respectively equivalently formed as the electrical feeding points 211. In this way, in a state where the connection lines of the two electrical feeding points 211 of each of the radiation elements 21 coincide, when the physical feeding structures corresponding to the two electrical feeding points 211 at both ends of the connection line of each of the electrical feeding points 211 are respectively connected to the first excitation signal and the second excitation signal, the electrical feeding points 211 on the same side of each of the radiation elements 21 are respectively connected to the first excitation signal and the second excitation signal, thereby forming a state in which each of the radiation elements 21 has the same polarization direction.

[0152] That is to say, in a state where two adjacent radiation elements 21 are electrically connected by a microstrip feeding line 212, the microstrip feeding line 212 mixes and transmits the first excitation signal and the second excitation signal.

[0153] Furthermore, corresponding to Figure 15B , the two electrical feeding points 211 at both ends of the connection line of each of the electrical feeding points 211 are implemented in a point feeding structure, specifically implemented as a feeding connection point 2111; corresponding to Figure 15C , the two electrical feeding points 211 at both ends of the connection line of each of the electrical feeding points 211 are implemented in an edge feeding structure and are respectively connected to the first excitation signal and the second excitation signal by an edge feeding line 213 that is adjacent to and parallel to the straight edge of the corresponding radiation element 21; corresponding to Figure 15D , the two electrical feeding points 211 at both ends of the connection line of each of the electrical feeding points 211 are implemented in a microstrip feeding structure and are respectively connected to the first excitation signal and the second excitation signal by a microstrip feeding line 212 that is electrically connected to the corresponding radiation element 21.

[0154] Corresponding toFigure 16A and Figure 16B , the number of the radiation elements 21 of the inverting dual-feed microwave detection module is four, and corresponding to Figure 16A , at both ends of the connection line of each of the electrical feeding points 211, the two electrical feeding points 211 are implemented with a microstrip feeding structure and are respectively connected to the first excitation signal and the second excitation signal by a microstrip feeding line 212 electrically connected to the corresponding radiation element 21; corresponding to Figure 16B , at both ends of the connection line of each of the electrical feeding points 211, the two electrical feeding points 211 are implemented with an edge feeding structure and are respectively connected to the first excitation signal and the second excitation signal by an edge feeding line 213 adjacent to and parallel to the straight edge of the corresponding radiation element 21.

[0155] Corresponding to Figure 16C , in a state where the connection lines of the two electrical feeding points 211 of each of the radiation elements 21 coincide, the two electrical feeding points 211 of each of the radiation elements 21 are implemented with a microstrip feeding structure and are respectively connected to the first excitation signal and the second excitation signal by a microstrip feeding line 212 electrically connected to the radiation element 21. Among them, in the direction of the connection line of the two electrical feeding points 211 of each of the radiation elements 21, the electrical feeding points 211 on the same side of each of the radiation elements 21 are electrically connected. Specifically, the microstrip feeding lines 212 corresponding to the first excitation signal of each of the radiation elements 21 are electrically connected, and the microstrip feeding lines 212 corresponding to the second excitation signal of each of the radiation elements 21 are electrically connected. Thus, while forming each of the radiation elements 21 to be adjacently arranged in the same polarization direction with the electrical feeding points 211 located on the same straight line, because the connection structure in which the two electrically adjacent electrical feeding points 211 on the adjacent two radiation elements 21 are electrically connected is avoided, the mixed transmission of the first excitation signal and the second excitation signal on the microstrip feeding line 212 can be avoided, which is beneficial to further improving the anti-interference performance of the inverting dual-feed microwave detection module.

[0156] Particularly, in a state where the microstrip feed lines 212 corresponding to the respective radiation elements 21 for accessing the first excitation signal are electrically connected, and the microstrip feed lines 212 corresponding to the respective radiation elements 21 for accessing the second excitation signal are electrically connected, the microstrip feed lines 212 corresponding to the respective radiation elements 21 for accessing the first excitation signal are preferably set to be of equal length, and the microstrip feed lines 212 corresponding to the respective radiation elements 21 for accessing the second excitation signal are preferably set to be of equal length. Thus, it is beneficial to realize that the first excitation signal is in-phase accessed by the respective radiation elements 21, and the second excitation signal that is in-phase accessed and is opposite in phase to the first excitation signal, thereby ensuring the stability of the in-phase dual-feed microwave detection module and improving the accuracy of the in-phase dual-feed microwave detection module.

[0157] It is worth mentioning that to adapt to the detection requirements in different environments, the shapes, quantities, and arrangement manners of the radiation elements 21 are diverse. In the above embodiments of the present invention, the descriptions of the corresponding shapes, quantities, and arrangement manners of the radiation elements 21 of the in-phase dual-feed microwave detection module are only for illustration and do not limit the present invention. Based on the in-phase dual-feed setting of the radiation elements 21 formed by accessing the first excitation signal and the second excitation signal that is opposite in phase to the first excitation signal, the object of the present invention has been completely and effectively achieved. Without departing from the principle, the embodiments of the present invention can have any deformation or modification.

[0158] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples.

[0159] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the drawings are only for illustration and do not limit the present invention. The object of the present invention has been completely and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the principle, the embodiments of the present invention can have any deformation or modification.

Claims

1. An inverting dual-feed microwave detection module, characterized in that Comprising: A feed source, wherein the feed source is arranged to be powered and output a first excitation signal and a second excitation signal that is in antiphase with the first excitation signal with the positive electrode or the ground electrode of the corresponding power supply as the reference ground electrode; A reference ground, wherein the reference ground is arranged as a sheet-shaped conductive layer; And At least one radiation element, wherein each of the radiation elements is arranged as a sheet-shaped conductive layer and is spaced from the reference ground in a state where the planes of the two sheet-shaped conductive layers tend to be parallel. Each of the radiation elements equivalently has two electrical feeding points, and the connection line of the two electrical feeding points of each of the radiation elements passes through the physical center point of the radiation element. Each of the radiation elements is arranged such that the first excitation signal is connected to one of the electrical feeding points and the second excitation signal is connected to the other electrical feeding point to form an antiphase double feeding for the radiation element. The feed source has a three-terminal transistor arranged as a triode or a field effect transistor. When the three-terminal transistor is arranged as a triode, each of the radiation elements is electrically coupled to the emitter or the base of the triode at one of the electrical feeding points and is electrically coupled to the collector of the triode at the other electrical feeding point. When the three-terminal transistor is arranged as a field effect transistor, each of the radiation elements is electrically coupled to the source or the gate of the field effect transistor at one of the electrical feeding points and is electrically coupled to the drain of the field effect transistor at the other electrical feeding point. Thus, in the state where the feed source is powered, an antiphase double feeding for the radiation element is formed.

2. The antiphase double-fed microwave detection module according to claim 1, wherein the feed source is implemented in the form of an analog circuit as an oscillation circuit having the three-terminal transistor.

3. The antiphase double-fed microwave detection module according to claim 2, wherein the three-terminal transistor is arranged as a triode, and each of the radiation elements is electrically coupled to the collector of the triode through an equivalent capacitor at one of the electrical feeding points and is electrically coupled to the emitter of the triode through another equivalent capacitor at the other electrical feeding point. The equivalent capacitor is a circuit or an electronic component having a capacitance characteristic under an electrical signal corresponding to the frequencies of the first excitation signal and the second excitation signal.

4. The antiphase double-fed microwave detection module according to claim 3, wherein at least one of the equivalent capacitors is implemented as a capacitor component.

5. The antiphase double-fed microwave detection module according to claim 3, wherein at least one of the equivalent capacitors is implemented as a microstrip distributed capacitance.

6. The antiphase double-fed microwave detection module according to claim 3, wherein the antiphase double-fed microwave detection module further comprises a microstrip mixer, and each of the radiation elements is electrically coupled to the three-terminal transistor through the microstrip mixer at one of the electrical feeding points of the radiation element.

7. The inverting dual-fed microwave detection module according to claim 1, wherein the feed source is designed in the form of an integrated circuit and is arranged as a microwave chip integrated with the three-terminal transistor. The microwave chip has two emission terminals. When the three-terminal transistor is arranged as a triode, the two emission terminals of the microwave chip are electrically coupled to the collector and the emitter of the triode respectively. When the three-terminal transistor is arranged as a field-effect transistor, the two emission terminals of the microwave chip are electrically coupled to the source and the drain of the field-effect transistor respectively, so as to output the first excitation signal at one of the emission terminals and output the second excitation signal that is in opposite phase to the first excitation signal at the other emission terminal.

8. The inverting dual-fed microwave detection module according to claim 1, wherein the feed source is designed in the form of a semi-integrated circuit and is arranged as a microwave chip externally connected with the three-terminal transistor. The microwave chip has an emission terminal for correspondingly outputting the first excitation signal. When the three-terminal transistor is arranged as a triode, the emission terminal of the microwave chip is electrically coupled to the base or the emitter of the triode, so as to output the first excitation signal at the emission terminal and output the second excitation signal at the collector of the triode. When the three-terminal transistor is arranged as a field-effect transistor, the emission terminal of the microwave chip is electrically coupled to the gate or the source of the field-effect transistor, so as to output the first excitation signal at the emission terminal and output the second excitation signal at the source-drain of the field-effect transistor.

9. The inverting dual-fed microwave detection module according to any one of claims 1 to 8, wherein when the feed source is powered, each of the radiation elements is electrically connected to the reference ground electrode at the physical center point of the radiation element.

10. The inverting dual-fed microwave detection module according to claim 9, wherein the midpoint of the connection line between the two electrical feeding points of the radiation element is located at the physical center point of the radiation element, that is, the two electrical feeding points of the radiation element are symmetric with respect to the physical center point of the radiation element.

11. The inverting dual-fed microwave detection module according to claim 10, wherein the radiation element is arranged symmetrically with respect to the connection line between the two electrical feeding points of the radiation element.

12. The inverting dual-fed microwave detection module according to claim 10, wherein when the feed source is powered, the reference ground is electrically connected to the reference ground electrode, and each of the radiation elements is electrically connected to the reference ground electrode in a state of being electrically connected to the reference ground at the physical center point of the radiation element.

13. The inverting dual-fed microwave detection module according to claim 12, wherein each of the radiation elements is electrically connected to the reference ground through a metallized via structure at the physical center point of the radiation element.

14. The inverting dual-fed microwave detection module according to claim 13, wherein the number of the radiation elements is one.

15. The inverting dual-feed microwave detection module according to claim 14, wherein the two electrical feeding points of the radiating element are respectively arranged as a feeding connection point in a point feeding structure, that is, the radiating element is arranged such that the first excitation signal is accessed at one of the feeding connection points and the second excitation signal is accessed at the other feeding connection point. Corresponding to the two electrical feeding points, they are respectively equivalent to being located at the two feeding connection points. Then, the radiating element is symmetric about the line connecting the two feeding connection points, and the midpoint of the line connecting the two feeding connection points is located at the physical center point of the radiating element.

16. The inverting dual-feed microwave detection module according to claim 15, wherein the radiating element is arranged as a rectangular sheet-shaped conductive layer, and the line connecting the two feeding connection points is perpendicular to two opposite sides of the radiating element.

17. The inverting dual-feed microwave detection module according to claim 15, wherein the radiating element is arranged as a circular sheet-shaped conductive layer.

18. The inverting dual-feed microwave detection module according to claim 15, wherein the straight line passing through the physical center point of the radiating element and perpendicular to the line connecting the two electrical feeding points on the radiating element is the zero potential line of the radiating element. The two sides of the radiating element located on the zero potential line are recessed in the direction towards the physical center point of the radiating element.

19. The inverting dual-feed microwave detection module according to claim 18, wherein the electrical feeding point corresponding to the first excitation signal access of the radiating element is arranged as two feeding connection points in a point feeding structure, that is, the radiating element is arranged such that the first excitation signal is simultaneously accessed at the two feeding connection points. The midline of the line connecting the two feeding connection points passes through the physical center point of the radiating element, and the corresponding electrical feeding point is equivalent to being located at the midpoint of the line connecting the two feeding connection points.

20. The inverting dual-feed microwave detection module according to claim 19, wherein the electrical feeding point corresponding to the second excitation signal access of the radiating element is arranged as a feeding connection point in a point feeding structure, that is, the radiating element is arranged such that the second excitation signal is accessed at this feeding connection point, and the corresponding electrical feeding point is equivalent to being located at this feeding connection point.

21. The inverting dual-feed microwave detection module according to claim 19, wherein the electrical feeding point corresponding to the second excitation signal access of the radiating element is arranged as two feeding connection points in a point feeding structure, that is, the radiating element is arranged such that the second excitation signal is simultaneously accessed at the two feeding connection points. The midline of the line connecting the two feeding connection points passes through the physical center point of the radiating element, and the corresponding electrical feeding point is equivalent to being located at the midpoint of the line connecting the two feeding connection points.

22. The inverting dual-fed microwave detection module according to claim 14, wherein the electrical feeding point of the radiating element corresponding to the access of the first excitation signal is arranged in a microstrip feeding structure, and the radiating element is connected to the first excitation signal through a microstrip feeding line electrically connected to the radiating element, that is, the electrical feeding point of the radiating element corresponding to the access of the first excitation signal is equivalently located at the point on the radiating element electrically connected to the microstrip feeding line.

23. The inverting dual-fed microwave detection module according to claim 22, wherein the electrical feeding point of the radiating element corresponding to the access of the second excitation signal is arranged in a microstrip feeding structure, and the radiating element is connected to the second excitation signal through another microstrip feeding line electrically connected to the radiating element, that is, the electrical feeding point of the radiating element corresponding to the access of the second excitation signal is equivalently located at the point on the radiating element electrically connected to this microstrip feeding line.

24. The inverting dual-fed microwave detection module according to claim 23, wherein the radiating element is hollowed out along the microstrip feeding line to form an adjustment of the position of the corresponding electrical feeding point in the direction of the physical center point of the radiating element on the radiating element.

25. The inverting dual-fed microwave detection module according to claim 22, wherein the electrical feeding point of the radiating element corresponding to the access of the second excitation signal is arranged in a point feeding structure as a feeding connection point, that is, the radiating element is arranged to access the second excitation signal at the feeding connection point, and the corresponding electrical feeding point is equivalently located at the feeding connection point.

26. The inverting dual-fed microwave detection module according to claim 22, wherein the electrical feeding point of the radiating element corresponding to the access of the second excitation signal is arranged in an edge feeding structure, and the radiating element is connected to the second excitation signal through an edge feeder, wherein the edge feeder is a microstrip line adjacent to and parallel to the straight edge of the radiating element, and the corresponding electrical feeding point is equivalently located at the midpoint of the edge feeder.

27. The inverting dual-fed microwave detection module according to claim 14, wherein the electrical feeding point of the radiating element corresponding to the access of the first excitation signal is arranged in an edge feeding structure, and the radiating element is connected to the first excitation signal through an edge feeder, wherein the edge feeder is a microstrip line adjacent to and parallel to the straight edge of the radiating element, and the corresponding electrical feeding point is equivalently located at the midpoint of the edge feeder.

28. The inverting dual-fed microwave detection module according to claim 27, wherein the electrical feeding point of the radiating element corresponding to the access of the second excitation signal is arranged in an edge feeding structure, and the radiating element is connected to the second excitation signal through another edge feeder, wherein the edge feeder is a microstrip line adjacent to and parallel to the straight edge of the radiating element, and the corresponding electrical feeding point is equivalently located at the midpoint of this edge feeder.

29. The inverting dual-fed microwave detection module according to claim 27, wherein the electrical feeding point of the radiation element corresponding to the second excitation signal is set as a feeding connection point in a point feeding structure, that is, the radiation element is arranged to access the second excitation signal at the feeding connection point, and correspondingly, the electrical feeding point is equivalently located at the feeding connection point.

30. The inverting dual-fed microwave detection module according to claim 13, wherein the number of the radiation elements is at least two, and a straight line passing through the physical center point of the radiation element and perpendicular to the connection line of the two electrical feeding points on the radiation element is defined as the zero potential line of the radiation element, and each of the radiation elements is adjacently arranged in a state where the zero potential lines coincide.

31. The inverting dual-fed microwave detection module according to claim 30, wherein the directions from the electrical feeding points of the adjacent two radiation elements corresponding to the first excitation signal to the electrical feeding points corresponding to the second excitation signal are opposite.

32. The inverting dual-fed microwave detection module according to claim 30, wherein the directions from the electrical feeding points of each of the radiation elements corresponding to the first excitation signal to the electrical feeding points corresponding to the second excitation signal are the same.

33. The inverting dual-fed microwave detection module according to claim 32, wherein each of the radiation elements is arranged on the same side of the zero potential line and accesses the first excitation signal through a microstrip feeding line respectively, and on the other side of the zero potential line and accesses the second excitation signal through another microstrip feeding line respectively, wherein the microstrip feeding lines of each of the radiation elements corresponding to the first excitation signal are electrically connected and arranged to be of equal length, and the microstrip feeding lines of each of the radiation elements corresponding to the second excitation signal are electrically connected and arranged to be of equal length.

34. The inverting dual-fed microwave detection module according to claim 13, wherein the number of the radiation elements is two, and the two radiation elements are arranged in a state where the connection line of the two electrical feeding points of the radiation elements is perpendicular to each other.

35. The inverting dual-fed microwave detection module according to claim 13, wherein the number of the radiation elements is at least two, and the radiation elements are adjacently arranged in a state where the connection lines of the two electrical feeding points of each of the radiation elements coincide, that is, each of the radiation elements is adjacently arranged in a state where the electrical feeding points are located on the same straight line.

36. The inverting dual-fed microwave detection module according to claim 35, wherein the directions from the electrical feeding points of each of the radiation elements corresponding to the first excitation signal to the electrical feeding points corresponding to the second excitation signal are the same, and each of the radiation elements has the same polarization direction.

37. The inverting dual-fed microwave detection module according to claim 36, wherein two electrical feeding points that are located on different radiating elements and are adjacent to each other among two adjacent radiating elements are electrically connected, so that when the first excitation signal and the second excitation signal are respectively applied to the two electrical feeding points at both ends of the connection line of each electrical feeding point, a state can be formed in which each radiating element has the same polarization direction.

38. The inverting dual-fed microwave detection module according to claim 37, wherein two electrical feeding points that are located on different radiating elements and are adjacent to each other among two adjacent radiating elements are arranged and electrically connected in a microstrip feeding structure, and two adjacent radiating elements are electrically connected by a microstrip feeding line, and the points electrically connected to the microstrip feeding line on the two adjacent radiating elements respectively equivalently form the electrical feeding points, so as to form a state in which two electrical feeding points that are located on different radiating elements and are adjacent to each other among two adjacent radiating elements are electrically connected.

39. The inverting dual-fed microwave detection module according to claim 36, wherein two electrical feeding points of each radiating element are arranged in a microstrip feeding structure, and each radiating element is respectively connected to the first excitation signal through a microstrip feeding line electrically connected to the radiating element, and is connected to the second excitation signal through another microstrip feeding line electrically connected to the radiating element. The two electrical feeding points of the corresponding radiating element are equivalently located at the points on the radiating element that are electrically connected to the two microstrip feeding lines. The microstrip feeding lines corresponding to each radiating element for accessing the first excitation signal are electrically connected and arranged with equal lengths, and the microstrip feeding lines corresponding to each radiating element for accessing the second excitation signal are electrically connected and arranged with equal lengths.

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