Microwave detection module for realizing receiving and transmitting separation by Wilkinson power divider

Abstract

The utility model provides a microwave detection module using a Wilkinson power divider to realize receiving and transmitting separation, and the application of the Wilkinson power divider in the microwave detection module jumps from the traditional application of the Wilkinson power divider as a bidirectional power divider. Correspondingly, in the microwave detection module, in a passive device form, the antenna is arranged between an antenna adopting a transceiving integrated structure design and a microwave chip adopting a transceiving separation design, and transceiving separation of the antenna under relatively high isolation can be realized, so that the antenna is matched with the microwave chip; therefore, the cost advantage of the microwave detection module and the miniaturization trend of a product can be guaranteed based on the matching between the antenna adopting a receiving and transmitting integrated structure design and the microwave chip adopting a receiving and transmitting separated design; and the stability and the detection precision of the microwave detection module are ensured based on receiving and transmitting separation of the antenna under relatively high isolation.

Description

TECHNICAL FIELD

[0001] The utility model relates to the microwave Doppler detection field, more detailed and it is related to a kind of microwave detection module with wilkinson power divider to realize transceiver separation. BACKGROUND

[0002] With the development of Internet of Things technology, artificial intelligence, smart home and intelligent security technology have more and more needs for environmental detection, especially for the detection of human presence, movement and micro-motion characteristics. Microwave detection technology based on the Doppler effect principle has unique advantages in behavior detection and presence detection technology as an important hub between people and things, and between things. It can detect the motion characteristics, movement characteristics and micro-motion characteristics of moving objects such as people without invading their privacy, even the heart rate and breathing characteristics of people, so it has wide application prospects. Existing microwave detection modules mainly use a transceiver antenna structure design based on cost and size considerations. The antenna uses the same feed port as the transmit feed port and the receive feed port for accessing the excitation signal, and simultaneously as the transmit antenna and receive antenna of the microwave detection module. This reduces the cost and size of the antenna, which helps to ensure the cost advantage of the microwave detection module and meet the trend of product miniaturization. In addition, with the rapid development of domestic chip industry and continuous optimization of cost, current microwave detection modules generally tend to replace discrete component form RF oscillator circuit and mixer processing circuit with microwave chips. This further reduces the size of the microwave detection module, simplifies the circuit design of the microwave detection module based on the high integration advantage of microwave chips over discrete components, and enriches the functional design of the microwave detection module. However, among current microwave chips, microwave chips that can maintain advantages in cost, stability and isolation mainly use transceiver separation design. The microwave chip uses different ports as the transmit port for outputting the excitation signal and the receive port for accessing the feedback signal.

[0003] To realize the transceiver separation of the antenna with a transceiver combination structure design and match the microwave chip with a transceiver separation design, current microwave detection modules mainly correspond to Figure 1A Use a 3dB bridge to realize the transceiver separation of the antenna, or use a ring bridge corresponding to Figure 1B To realize the transceiver separation of the antenna. For example Figure 1AAs shown, the microwave detection module comprises an antenna 10P, a 3dB bridge 20P and a microwave chip 30P, wherein the antenna 10P is designed in a transceiver integrated structure to use the same feeding port 101P as the transmitting feeding port for accessing the excitation signal and the receiving feeding port for outputting the feedback signal, wherein the 3dB bridge 20P has an input end 201P, a first output end 202P, a second output end 203P and an isolation end 204P connected in sequence by microstrip connection lines, and the input end 201P is connected to the isolation end 204P to make the 3dB bridge 20P in a ring-shaped four-port form, wherein the input end 201P, the first output end 202P, the second output end 203P and the isolation end 204P are designed with equal impedance, and the corresponding impedance is Z0, the microstrip connection line between the input end 201P and the isolation end 204P and the microstrip connection line between the first output end 202P and the second output end 203P are designed with impedance of Z0 and equal length design with quarter wavelength electrical length, and the microstrip connection line between the input end 201P and the first output end 202P and the microstrip connection line between the second output end 202P and the isolation end 204P are designed with impedance of Z0 / √2 and equal length design with quarter wavelength electrical length, wherein the microwave chip 30P is designed in a transceiver separated structure to use different ports as the transmitting port 301P for outputting the excitation signal and the receiving port 302P for accessing the feedback signal, so as to realize the transceiver separation of the antenna 10P designed in the transceiver integrated structure and match the microwave chip 30P designed in the transceiver separated structure. Figure 1A In the state that the input end 201P is connected to the transmitting port 301P, the isolation end 204P is connected to the receiving port 302P, and the first output end 201P is connected to the feeding port 101P of the antenna 10P, the excitation signal output from the transmitting port 301P can be transmitted to the feeding port 101P of the antenna 10P and cannot be transmitted to the receiving port 302P, while the feedback signal output from the feeding port 101P of the antenna 10P can be transmitted to the receiving port 302P, which realizes the transceiver separation of the antenna 10P designed in the transceiver integrated structure and matches the microwave chip 30P designed in the transceiver separated structure.

[0004] Based on the above description, the total length of the microstrip connection lines connected only between the four ports of the 3dB bridge 20P is as long as one wavelength electrical length, which corresponds to a larger area occupied in the circuit board and is not conducive to the miniaturization of the microwave detection module. Compared with the realization of the transceiver separation of the antenna 10P by using the 3dB bridge 20P, when the transceiver separation of the antenna 10P is realized by using the 3dB bridge 20P, the total length of the microstrip connection lines connected only between the four ports of the 3dB bridge 20P is as long as one wavelength electrical length, which corresponds to a larger area occupied in the circuit board and is not conducive to the miniaturization of the microwave detection module. Compared with the realization of the transceiver separation of the antenna 10P by using the 3dB bridge 20P, when the transceiver separation of the antenna 10P is realized by using the 3dB bridge 20P, Figure 1BThe ring-shaped electric bridge occupies a larger area in circuit board layout because the ring-shaped electric bridge is structurally equivalent to extending the microstrip connecting line between the first output end 202P and the second output end 203P of the 3dB electric bridge 20P from a quarter-wavelength electric length to three-quarter-wavelength electric length. In addition, the 3dB electric bridge 20P and the ring-shaped electric bridge are both ring-shaped four-port forms, and the impedance matching between the ports is complicatedly affected by the precision of the corresponding microstrip connecting line, so it is difficult to guarantee the isolation between the input end and the isolation end, and thus self-mixing phenomenon caused by local oscillator leakage and DC deviation is easily generated in actual application, thereby deteriorating the signal-to-noise ratio. Practical new type content

[0005] The microwave detection module with the Wilkinson power divider to realize the transmission-reception separation can realize the transmission-reception separation of the antenna with the transmission-reception combination structure design at a higher isolation degree, so as to match the microwave chip with the transmission-reception separation design, thereby guaranteeing the cost advantage of the microwave detection module and the miniaturization trend of the product, and guaranteeing the stability and detection precision of the microwave detection module based on the transmission-reception separation of the antenna at a higher isolation degree.

[0006] The microwave detection module with the Wilkinson power divider to realize the transmission-reception separation can realize the transmission-reception separation of the antenna with the transmission-reception combination structure design at a higher isolation degree, so as to match the microwave chip with the transmission-reception separation design, thereby guaranteeing the cost advantage of the microwave detection module and the miniaturization trend of the product, and guaranteeing the stability and detection precision of the microwave detection module based on the transmission-reception separation of the antenna at a higher isolation degree.

[0007] The microwave detection module with the Wilkinson power divider to realize the transmission-reception separation can realize the transmission-reception separation of the antenna with the transmission-reception combination structure design at a higher isolation degree, so as to match the microwave chip with the transmission-reception separation design, thereby guaranteeing the cost advantage of the microwave detection module and the miniaturization trend of the product, and guaranteeing the stability and detection precision of the microwave detection module based on the transmission-reception separation of the antenna at a higher isolation degree.

[0008] Another purpose of the utility model lies in providing a microwave detection module which realizes the separation of receiving and transmitting by Wilkinson power divider, wherein the Wilkinson power divider is used to realize the separation of receiving and transmitting of the antenna designed by the structure of receiving and transmitting integration under higher isolation, and simultaneously, the traditional application thought that one-way signal is divided into two-way signal or two-way signal is synthesized into one-way signal by the Wilkinson power divider as bidirectional power divider is broken, the Wilkinson power divider is simplified in impedance matching and the area of circuit board is reduced by the structure characteristics that the Wilkinson power divider has three-port structure design and the microstrip connecting line length is obviously shortened relative to 3dB electric bridge and ring electric bridge.

[0009] Another purpose of the utility model lies in providing a microwave detection module which realizes the separation of receiving and transmitting by Wilkinson power divider, wherein the Wilkinson power divider is set between the antenna and the microwave chip in passive device form, and the Wilkinson power divider is connected with the antenna and the microwave chip based on corresponding circuit connection structure or circuit coupling structure, and no additional power supply is needed based on external electrical connection, so as to simplify the circuit layout of the microwave detection module.

[0010] Another purpose of the utility model lies in providing a microwave detection module which realizes the separation of receiving and transmitting by Wilkinson power divider, wherein the Wilkinson power divider has an input port, a first output port and a second output port, and includes a first microstrip connecting line connected between the input port and the first output port, a second microstrip connecting line connected between the input port and the second output port, and a resistor connected between the first output port and the second output port, wherein the Wilkinson power divider is set between the antenna and the microwave chip in passive device form, and the first output port is electrically connected to the transmitting port of the microwave chip, the input port is electrically connected to the feeding port of the antenna, and the second output port is electrically connected to the receiving port of the microwave chip, so that the excitation signal output from the transmitting port of the microwave chip can be transmitted to the feeding port of the antenna and isolated from the receiving port under higher isolation, and the feedback signal output from the feeding port of the antenna can be transmitted to the receiving port of the microwave chip, so that the feedback signal received by the receiving port can be isolated from the excitation signal under higher isolation, and the separation of receiving and transmitting of the antenna designed by the structure of receiving and transmitting integration is realized and matched with the microwave chip designed by the structure of separation of receiving and transmitting.

[0011] Another purpose of the utility model discloses a kind of microwave detection module for separating receiving and transmitting with wilkinson power divider, wherein the resistance of the wilkinson power divider The resistance of the first output port and the impedance of the second output port is set to the sum of impedance, so as to improve the isolation of the former and protect the stability and detection accuracy of the microwave detection module.

[0012] To achieve the above at least one purpose, the utility model provides a kind of microwave detection module for separating receiving and transmitting with wilkinson power divider, the microwave detection module includes:

[0013] An antenna, wherein the antenna adopts the structure design of receiving and transmitting integration and simultaneously as the transmission feed port of access excitation signal and the receiving feed port of output feedback signal with same feed port;

[0014] A wilkinson power divider, corresponding the wilkinson power divider has an input port, a first output port and a second output port, and includes a first microstrip connecting line connected between the input port and the first output port, a second microstrip connecting line connected between the input port and the second output port, and a resistance connected between the first output port and the second output port, wherein the first microstrip connecting line and the second microstrip connecting line are set to be equal length;And

[0015] A microwave chip, wherein the microwave chip adopts receiving and transmitting separation design and different ports are respectively used as transmission port of output excitation signal and receiving port of access feedback signal, wherein the wilkinson power divider is set between the antenna and the microwave chip in passive device form, and the first output port is electrically connected to the transmission port of the microwave chip, and the input port is electrically connected to the feed port of the antenna, and the second output port is electrically connected to the receiving port of the microwave chip.

[0016] In an embodiment, wherein the first microstrip connecting line and the second microstrip connecting line are designed with equal impedance.

[0017] In an embodiment, wherein the resistance is set to 100Ω.

[0018] In an embodiment, wherein the first microstrip connecting line and the second microstrip connecting line are designed with different impedance.

[0019] In an embodiment, wherein the impedance of the first microstrip connecting line is greater than the impedance of the second microstrip connecting line.

[0020] In an embodiment, wherein the first microstrip connecting line and the second microstrip connecting line are strip conductors carried on a circuit board, wherein the first microstrip connecting line and the second microstrip connecting line in strip conductors respectively extend from the input port to define an isolation region on the circuit board with a gap between the first output port and the second output port as an opening, wherein the resistor is connected between the first output port and the second output port at the opening of the isolation region.

[0021] In an embodiment, wherein the antenna is designed as an array antenna composed of a plurality of antenna elements, each of the antenna elements employs a transceiver structure design to simultaneously serve as a transmission feed port accessing an excitation signal and a reception feed port outputting a feedback signal with a same feed port, wherein the feed ports of each of the antenna elements are collectively electrically connected to the input port.

[0022] In an embodiment, wherein the Wilkinson power divider extends a feed section from the input port to form an electrical connection relationship between the input port and the feed ports of the antenna based on an electrical connection relationship between the feed section and the feed ports of the antenna, wherein the feed section is within the isolation region.

[0023] In an embodiment, wherein the Wilkinson power divider is provided with at least one metal sheet in the isolation region.

[0024] In an embodiment, wherein the Wilkinson power divider is packaged in a form of a separate component. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1A A structural schematic diagram of a microwave detection module employing a 3dB bridge to achieve a separation of transmission and reception of an antenna.

[0026] Figure 1B A structural schematic diagram of a ring-shaped bridge.

[0027] Figure 2 A structural schematic diagram of a microwave detection module according to an embodiment of the present application.

[0028] Figure 3 An S-parameter curve between the first output port and the second output port of the microwave detection module according to the above embodiment of the present application.

[0029] Figure 4 A structural schematic diagram of a microwave detection module according to another embodiment of the present application.

[0030] Figure 5The S parameter curve between the first output port and the second output port of the microwave detection module according to the above embodiment of the utility model.

[0031] Figure 6 The structure principle diagram of a microwave detection module according to another embodiment of the utility model.

[0032] Figure 7 The further deformation structure schematic diagram of the Wilkinson power divider of a microwave detection module according to another embodiment of the utility model. DETAILED DESCRIPTION

[0033] The following description is provided to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments in the following description are only as examples, and other obvious modifications can be thought of by those skilled in the art. The basic principles of the utility model defined in the following description can be applied to other implementation schemes, deformation schemes, improvement schemes, equivalent schemes and other technical schemes without departing from the spirit and scope of the utility model.

[0034] Those skilled in the art should understand that in the disclosure of the utility model, the orientation or position relationship indicated by the terms 'longitudinal', 'transverse', 'upper', 'lower', 'front','rear', 'left', 'right','vertical', 'horizontal', 'top', 'bottom', 'inner', 'outer' and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation on the utility model.

[0035] It can be understood that the term 'one' should be understood as 'at least one' or 'one or more', that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term 'one' cannot be understood as a limitation on the number.

[0036] The utility model provides a kind of microwave detection module for realizing transceiver separation with Wilkinson power divider, wherein the Wilkinson power divider can realize the transceiver separation of antenna with transceiver integration structure design under higher isolation degree, so as to be matched with microwave chip with transceiver separation design, so as to be based on the matching between the antenna with transceiver integration structure design and the microwave chip with transceiver separation design, guarantee the cost advantage and the miniaturization trend of corresponding microwave detection module, and based on the transceiver separation of the antenna under higher isolation degree, guarantee the stability and detection precision of the microwave detection module.

[0037] For example, referring to the drawings of the specification of the utility model Figure 2As shown, a structure principle of a microwave detection module realized by a Wilkinson power divider is shown according to an embodiment of the utility model, wherein the microwave detection module comprises an antenna 10, a Wilkinson power divider 20 and a microwave chip 30, wherein the antenna 10 adopts a structure design of transceiver integration to simultaneously serve as a transmitting feed port of access excitation signal and a receiving feed port of output feedback signal by the same feed port 101, wherein the Wilkinson power divider 20 has an input port 201, a first output port 202 and a second output port 203, and comprises a first microstrip connecting line 21 connected between the input port 201 and the first output port 202, a second microstrip connecting line 22 connected between the input port 201 and the second output port 203, and a resistance 23 connected between the first output port 202 and the second output port 203, wherein the microwave chip 30 adopts a transceiver separation design to serve as a transmitting port 301 of output excitation signal and a receiving port 302 of access feedback signal by different ports, wherein the Wilkinson power divider 20 is arranged in a passive device form between the antenna 10 and the microwave chip 30, and is electrically connected to the transmitting port 301 of the microwave chip 30 at the first output port 202, to the feed port 101 of the antenna 10 at the input port 201, and to the receiving port 302 of the microwave chip 30 at the second output port 203, so that the excitation signal output from the transmitting port 301 of the microwave chip 30 can be transmitted to the feed port 101 of the antenna 10 and isolated from the receiving port 302 of the microwave chip 30 at a higher isolation degree, while the feedback signal output from the feed port 101 of the antenna 10 can be transmitted to the receiving port 302 of the microwave chip 30, which corresponds to the feedback signal received by the receiving port 302 of the microwave chip 30 being isolated from the excitation signal at a higher isolation degree, so as to realize the transceiver separation of the antenna 10 adopting the transceiver integration structure design at a higher isolation degree and match the microwave chip 30 adopting the transceiver separation design.

[0038] It is worth mentioning that, in the traditional application of Wilkinson power divider 20, the Wilkinson power divider 20 is used as a bidirectional power divider to input a signal from the input port 201 and divide the signal into two signals to be output from the first output port 202 and the second output port 203 respectively, or to input a signal from the first output port 202 and the second output port 203 respectively and combine the two signals into a signal to be output from the input port 201. The difference lies in the resistance 23 connected between the first output port 202 and the second output port 203, which is used to suppress the imbalance between the output signals caused by the unbalanced state of the first microstrip connection line 21 and the second microstrip connection line 22.

[0039] That is, the application of the Wilkinson power divider 20 in the microwave detection module of the utility model breaks through the traditional application of the Wilkinson power divider 20 as a bidirectional power divider. Specifically, in this embodiment of the utility model, the microwave detection module inputs an excitation signal from the first output port 202 of the Wilkinson power divider 20 so that the antenna 10 connected to the input port 201 can be fed and transmitted, and the sum of the lengths of the first microstrip connection line 21 and the second microstrip connection line 22 of the Wilkinson power divider 20 tends to be close to one-half wavelength electrical length, so that the excitation signal transmitted to the second output port 203 through the first microstrip connection line 21 and the second microstrip connection line 22 in sequence can be opposite to the excitation signal transmitted to the second output port 203 through the resistance 23, which corresponds to the excitation signal output from the transmission port 301 of the microwave chip 30 being isolated from the receiving port 302 of the microwave chip 30 at a higher isolation degree. However, the feedback signal output from the feed port 101 of the antenna 10 can be transmitted to the transmission port 301 and the receiving port 302 of the microwave chip 30 through the first microstrip line 21 and the second microstrip line 22 respectively. Therefore, the feedback signal received by the receiving port 302 of the microwave chip 30 can be isolated from the excitation signal at a higher isolation degree, so as to realize the separation of transmission and reception of the antenna 10 designed with a combined structure at a higher isolation degree, and match the microwave chip 30 designed with a separated structure.

[0040] It is worth mentioning that the sum of the lengths of the first microstrip connection line 21 and the second microstrip connection line 22 of the Wilkinson power divider 20 tends to be close to one-half wavelength electrical length, which has a significantly shortened microstrip connection line length compared with 3dB bridge and ring bridge, thus being beneficial to reducing the circuit board area of the microwave detection module, which corresponds to further miniaturization design of the microwave detection module.

[0041] In addition, the Wilkinson power divider 20 is in a three-port structure, which can reduce the complexity of the impedance matching between the ports affected by the precision of the corresponding microstrip connecting lines relative to the 3dB electrical bridge and the loop electrical bridge, correspondingly simplifies the impedance matching between the ports and reduces the precision requirement of the impedance matching between the ports on the corresponding microstrip connecting lines, thereby being beneficial to guarantee the stability of the aforementioned isolation, correspondingly guaranteeing the consistency and stability of the microwave detection module.

[0042] Those skilled in the art should understand that the Wilkinson power divider 20 is arranged between the antenna 10 and the microwave chip 30 in a passive device form, which means that the Wilkinson power divider 20 does not need to add a power supply based on an additional electrical connection relationship in addition to the electrical connection relationship established between the antenna 10 and the microwave chip 30 based on the corresponding circuit connection structure or circuit coupling structure, thereby being beneficial to simplify the circuit layout of the Wilkinson power divider 20 in the state that the Wilkinson power divider 20 is the Wilkinson power divider 20.

[0043] That is, the Wilkinson power divider 20 is electrically connected to the transmitting port 301 of the microwave chip 30 at the first output port 202, and is electrically connected to the feeding port 101 of the antenna 10 at the input port 201, and is electrically connected to the receiving port 302 of the microwave chip 30 at the second output port 203. Under the above electrical connection relationship, the description that the Wilkinson power divider 20 is arranged between the antenna 10 and the microwave chip 30 in a passive device form is a limitation that the Wilkinson power divider 20 will not add a power supply based on an additional electrical connection relationship.

[0044] Therefore, the microwave detection module of the utility model breaks out of the traditional application thinking that the Wilkinson power divider 20 is used as a bidirectional power divider, and the Wilkinson power divider 20 is used to replace the 3dB electrical bridge and the loop electrical bridge to realize the application of the antenna 10 designed in a transceiver integrated structure under a higher isolation, which does not need to make any change to the original structure design of the Wilkinson power divider 20 out of the original structure range of the Wilkinson power divider 20, and does not need to add any active circuit based on an additional electrical connection relationship between the Wilkinson power divider 20 and the antenna 10 and the microwave chip 30, thereby being beneficial to simplify the circuit layout of the Wilkinson power divider 20.

[0045] In this embodiment of the utility model, the first microstrip connecting line 21 and the second microstrip connecting line 22 are strip conductors carried on the circuit board, wherein the first microstrip connecting line 21 and the second microstrip connecting line 22 in the form of strip conductors extend from the input port 201 to define an isolation area 200 with a gap between the first output port 202 and the second output port 203 as an opening on the circuit board, wherein the resistor 23 is connected between the first output port 202 and the second output port 203 at the opening of the isolation area 200, and the specific form of the first microstrip connecting line 21 and the second microstrip connecting line 22 in the form of strip conductors does not constitute a limitation on the utility model, and the form of the corresponding defined isolation area 200 can be any form such as a triangle, a rectangle, a rhombus, a trapezoid and a circle.

[0046] Specifically in this embodiment of the utility model, the first microstrip connecting line 21 and the second microstrip connecting line 22 extend from the input port 201 in the opposite, same and opposite directions in turn, and the form of the corresponding defined isolation area 200 is a rectangle.

[0047] It is worth mentioning that since the sum of the lengths of the first microstrip connecting line 21 and the second microstrip connecting line 22 of the Wilkinson power divider 20 tends to be close to one-half wavelength electrical length, the lengths of the microstrip connecting lines are obviously shortened relative to the 3dB electrical bridge and the loop electrical bridge, in some embodiments of the utility model, the Wilkinson power divider 20 can also be designed in the form of an independent component, and also helps to reduce the circuit board area of the microwave detection module.

[0048] Further, in this embodiment of the utility model, the first microstrip connecting line 21 and the second microstrip connecting line 22 are designed with equal impedance, and the first microstrip connecting line 21 and the second microstrip connecting line 22 in the form of strip conductors have the same line width, which is beneficial to simplify the impedance matching design between the Wilkinson power divider 20 and the antenna 10 and the microwave chip 30.

[0049] Particularly, in the original structure range of the Wilkinson power divider 20, the resistance value of the resistor 23 is set to the sum of the impedance of the first output port 202 and the impedance of the second output port 203. In order to further simplify the impedance matching design between the Wilkinson power divider 20 and the microwave chip 30, in this embodiment of the utility model, the first output port 202 and the second output port 203 are designed with equal impedance.

[0050] Corresponding to the compatibility of the microwave detection module, in this embodiment of the utility model, the impedance of the input port 201, the first output port 202 and the second output port 203 is designed as 50Ω, and the resistance value of the resistance 23 is set as 100Ω.

[0051] Further referring to the drawings of the utility model Figure 3 The S parameter curve between the first output port 202 and the second output port 203 of the Wilkinson power divider 20 in this embodiment of the utility model is shown, and under the simulation condition that the first output port 202 accesses the excitation signal, the S parameter associated with the energy proportion of the excitation signal output by the second output port 203 at the 5.8GHz frequency point is as low as-30dB or below, corresponding to the state that the first output port 202 of the Wilkinson power divider 20 is electrically connected to the transmitting port 301 of the microwave chip 30, and the second output port 203 is electrically connected to the receiving port 302 of the microwave chip 30, the excitation signal output from the transmitting port 301 of the microwave chip 30 can be isolated from the receiving port 302 of the microwave chip 30 at a higher isolation degree, so that under the state that the Wilkinson power divider 20 is further electrically connected to the feed port 101 of the antenna 10 at the input port 201, the feedback signal received by the receiving port 302 of the microwave chip 30 can be isolated from the excitation signal at a higher isolation degree, corresponding to realizing the transmission-reception separation of the antenna 10 with the transmission-reception integrated structure design at a higher isolation degree and matching with the microwave chip 30 with the transmission-reception separated design.

[0052] It is worth mentioning that the structure feature that the first microstrip connection line 21 and the second microstrip connection line 22 are designed with equal impedance is not limited to the original structure range of the Wilkinson power divider 20, and thus does not constitute a structure limitation of the Wilkinson power divider 20 in the microwave detection module of the utility model, in other embodiments of the utility model, the first microstrip connection line 21 and the second microstrip connection line 22 can also be designed with different impedances to have a more flexible impedance matching structure relative to the 3dB bridge and the loop bridge, corresponding to being conducive to guaranteeing the flexibility of the circuit layout of the Wilkinson power divider 20 to adapt to different structure and function design requirements.

[0053] Exemplarily, referring to the drawings of the utility model Figure 4As shown, the structure principle of the microwave detection module according to another embodiment of the utility model is shown, wherein different from the microwave detection module of the last embodiment, in this embodiment of the utility model, the first microstrip connection line 21 and the second microstrip connection line 22 of the Wilkinson power divider 20 are designed with different impedances.

[0054] Specifically in this embodiment of the utility model, the impedance of the first microstrip connection line 21 is greater than the impedance of the second microstrip connection line 22, and the line width of the first microstrip connection line 21 corresponding to the strip conductor is narrower than the second microstrip connection line 22, so that in the state that the first output port 202 of the Wilkinson power divider 20 is electrically connected to the transmitting port 301 of the microwave chip 30, and the input port 201 is electrically connected to the feed port 101 of the antenna 10, and the second output port 203 is electrically connected to the receiving port 302 of the microwave chip 30, the feedback signal output from the feed port 101 of the antenna 10 can be transmitted to the receiving port 302 of the microwave chip 30 with a larger power division ratio, thereby improving the detection accuracy of the microwave detection module.

[0055] It is worth mentioning that in the state that the impedance of the first microstrip connection line 21 is greater than the impedance of the second microstrip connection line 22, the S parameter curve between the first output port 202 and the second output port 203 of the Wilkinson power divider 20 corresponds to as Figure 5 As shown, under the simulation condition that the first output port 202 accesses the excitation signal, the energy proportion of the excitation signal output by the second output port 203 at the frequency point of 5.8GHz is still associated with an S parameter as low as-30dB or below, which is further reduced to-33dB or below compared with the last embodiment, corresponding to the state that the first output port 202 of the Wilkinson power divider 20 is electrically connected to the transmitting port 301 of the microwave chip 30, and the second output port 203 is electrically connected to the receiving port 302 of the microwave chip 30, the excitation signal output from the transmitting port 301 of the microwave chip 30 can be isolated from the receiving port 302 of the microwave chip 30 at a higher isolation degree, so that in the state that the Wilkinson power divider 20 is further electrically connected to the feed port 101 of the antenna 10 at the input port 201, the feedback signal received by the receiving port 302 of the microwave chip 30 can be isolated from the excitation signal at a higher isolation degree, corresponding to realizing the transmission-reception separation of the antenna 10 adopting the transmission-reception integrated structure design at a higher isolation degree and matching with the microwave chip 30 adopting the transmission-reception separated design.

[0056] It can be understood that in the above embodiments of the utility model, in the state that the antenna 10 adopts the structure design of transceiving integration and simultaneously serves as the transmitting feeding port of access excitation signal and the receiving feeding port of output feedback signal, the specific type and structure of the antenna 10 (including the number of feeding ports and the structure of feeding ports corresponding to different feeding modes) do not constitute the limitation to the utility model.

[0057] For example, in the state that the antenna 10 is provided as a microstrip antenna (also called flat plate antenna), the antenna 10 has one or more feeding ports, and simultaneously serves as the transmitting feeding port of access excitation signal and the receiving feeding port of output feedback signal at the same feeding port 101.

[0058] That is to say, the specific type and structure of the antenna 10 do not constitute the limitation to the microwave detection module of the utility model, and in the microwave detection module of the utility model, the antenna 10 can be one of a microstrip antenna, a columnar antenna, a dipole antenna, an inverted F antenna, an inverted L antenna, a spiral antenna and a half-wave folded antenna and numerous existing antennas, as long as the antenna 10 adopts the structure design of transceiving integration and simultaneously serves as the transmitting feeding port of access excitation signal and the receiving feeding port of output feedback signal at the same feeding port 101.

[0059] In addition, in the state that the antenna 10 adopts the structure design of transceiving integration and simultaneously serves as the transmitting feeding port of access excitation signal and the receiving feeding port of output feedback signal at the same feeding port 101, the antenna 10 can also correspond to Figure 6 be designed as an array antenna composed of multiple same type or different type antenna units, correspondingly adopt the structure design of transceiving integration and simultaneously serve as the transmitting feeding port of access excitation signal and the receiving feeding port of output feedback signal at the same feeding port 101, wherein the feeding port 101 of each antenna unit is connected to the input port 201 of the Wilkinson power divider 20 in a concentrated manner, and the antenna 10 still conforms to the description of "adopting the structure design of transceiving integration and simultaneously serving as the transmitting feeding port of access excitation signal and the receiving feeding port of output feedback signal at the same feeding port 101".

[0060] It is worth mentioning that, in the embodiments of the utility model, the wilkinson power divider 20 extends a feeding section 2011 from the input port 201, to form the electrical connection relationship between the input port 201 and the feeding port 101 of the antenna 10 based on the electrical connection relationship between the feeding section 2011 and the feeding port 101 of the antenna 10, and the impedance of the input port 201 can be designed differently based on the impedance of the first microstrip connecting line 21 or the impedance of the second microstrip connecting line 22 relative to the leading-out of the feeding section 2011, wherein the length of the feeding section 2011 is not included in the length of the first microstrip connecting line 21 or the second microstrip connecting line 22.

[0061] In particular, with reference to the drawings of the utility model Figure 7 Further deformation structure of the wilkinson power divider 20 is shown, wherein the feeding section 2011 is in the isolation area 200, thus further reducing the circuit board area of the microwave detection module, which is conducive to further miniaturization design of the microwave detection module.

[0062] In addition, the wilkinson power divider 20 can be optionally Figure 7 Further, at least one metal sheet 24 is arranged in the isolation area 200 to further improve the isolation degree based on the arrangement of the metal sheet 24. The metal sheet 24 can be optionally further arranged to be grounded.

[0063] In particular, in the above embodiments of the utility model, the first microstrip connecting line 21 and the second microstrip connecting line 22 are designed to be equal in length corresponding to the original structure of the wilkinson power divider 20, and the sum of the lengths of the first microstrip connecting line 21 and the second microstrip connecting line 22 approaches half of the wavelength electrical length, and the lengths of the first microstrip connecting line 21 and the second microstrip connecting line 22 both approach a quarter of the wavelength electrical length.

[0064] Those skilled in the art can understand that the above embodiments are only examples, and the features of different embodiments can be combined with each other to obtain embodiments that can be easily thought of according to the disclosure of the utility model but are not explicitly indicated in the drawings.

[0065] Those skilled in the art should understand that the above description and the embodiments of the utility model shown in the drawings are only examples and do not limit the utility model. The purpose of the utility model has been completely and effectively realized. The function and structural principle of the utility model have been shown and explained in the embodiments, and the embodiments of the utility model can be any deformation or modification without departing from the principle.

Claims

1. A microwave detection module for implementing transceiver separation with a Wilkinson power divider, characterized in that, Comprising: an antenna, wherein the antenna is designed with a transceiver-integrated structure to have a same feeding port as a transmitting feeding port for accessing an excitation signal and a receiving feeding port for outputting a feedback signal; a Wilkinson power divider, corresponding to the Wilkinson power divider having an input port, a first output port and a second output port, and comprising a first microstrip connecting line connected between the input port and the first output port, a second microstrip connecting line connected between the input port and the second output port, and a resistor connected between the first output port and the second output port, wherein the first microstrip connecting line and the second microstrip connecting line are designed with equal length; and a microwave chip, wherein the microwave chip is designed with a transceiver-separated structure to have different ports as a transmitting port for outputting an excitation signal and a receiving port for accessing a feedback signal, wherein the Wilkinson power divider is disposed between the antenna and the microwave chip in a passive device form, and is electrically connected to the transmitting port of the microwave chip at the first output port, to the feeding port of the antenna at the input port, and to the receiving port of the microwave chip at the second output port. 2.The microwave detection module with transceiver separation realized by Wilkinson power divider according to claim 1, wherein the first microstrip connecting line and the second microstrip connecting line are designed with equal impedance. 3.The microwave detection module with transceiver separation realized by Wilkinson power divider according to claim 2, wherein the resistor is designed with a resistance of 100Ω. 4.The microwave detection module with transceiver separation realized by Wilkinson power divider according to claim 1, wherein the first microstrip connecting line and the second microstrip connecting line are designed with different impedance. 5.The microwave detection module with transceiver separation realized by Wilkinson power divider according to claim 4, wherein the first microstrip connecting line is designed with a larger impedance than the second microstrip connecting line. 6.The microwave detection module with transceiver separation realized by Wilkinson power divider according to any one of claims 1 to 5, wherein the first microstrip connecting line and the second microstrip connecting line are strip conductors carried on a circuit board, wherein the first microstrip connecting line and the second microstrip connecting line are respectively extended from the input port to define an isolation region with a gap between the first output port and the second output port as an opening on the circuit board, and the resistor is connected between the first output port and the second output port at the opening of the isolation region. 7.The microwave detection module with transceiver separation realized by Wilkinson power divider according to claim 6, wherein the antenna is designed as an array antenna composed of a plurality of antenna units, and each of the antenna units is designed with a transceiver-integrated structure to have a same feeding port as a transmitting feeding port for accessing an excitation signal and a receiving feeding port for outputting a feedback signal, wherein the feeding ports of each of the antenna units are collectively electrically connected to the input port. ​ 8. The microwave detection module of claim 6, wherein the Wilkinson power divider has a feeding section extending from the input port to form an electrical connection between the input port and the feeding port of the antenna based on an electrical connection relationship between the feeding section and the feeding port of the antenna, and wherein the feeding section is within the isolation region.

9. The microwave detection module of claim 6, wherein the Wilkinson power divider is provided with at least one metal sheet within the isolation region.

10. The microwave detection module of any one of claims 1 to 5, wherein the Wilkinson power divider is designed in a package form of a standalone component.

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