Transmitting and receiving integrated microwave chip packaged with isolator and microwave detection module

Abstract

The utility model provides a receiving and transmitting integrated microwave chip packaged with an isolator and a microwave detection module, wherein the microwave chip adopts a receiving and transmitting integrated design and uses the same antenna port as a transmitting port for outputting an excitation signal and a receiving port for accessing a feedback signal at the same time; based on the isolator packaged in the antenna, receiving and transmitting are integrated under high isolation, so that the antenna can be matched with an antenna adopting a receiving and transmitting integrated design. The layout of a feed line between the antenna and the microwave chip which adopt a transmit-receive integrated design is simplified, so that the cost advantage of the corresponding microwave detection module is guaranteed, and the miniaturization trend of a product is complied with; and the stability and the detection precision of the microwave detection module are ensured based on the receiving and transmitting integration of the microwave chip under relatively high isolation.

Description

TECHNICAL FIELD

[0001] The utility model relates to the microwave doppler detection field more detailed and refers to a transceiving microwave chip and microwave detection module encapsulated with isolator. BACKGROUND

[0002] With the development of the internet of things technology, artificial intelligence, smart home and intelligent security technology have more and more requirements for environment 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 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 a wide application prospect. The existing microwave detection module mainly adopts a transceiving antenna structure design considering cost and size, that is, the antenna simultaneously serves as a transmitting feed port for accessing an excitation signal and a receiving feed port for outputting a feedback signal, and simultaneously serves as a transmitting antenna and a receiving antenna of the microwave detection module. This reduces the cost and size of the antenna and helps to ensure the cost advantage of the microwave detection module and adapt to the trend of product miniaturization. Moreover, with the rapid development of domestic chip industry and the continuous optimization of cost, the current microwave detection module generally tends to replace the discrete component form of radio frequency oscillation circuit and mixing processing circuit with a microwave chip. 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 the microwave chip relative to discrete components, and enriches the functional design of the microwave detection module. However, among the current microwave chips, the microwave chips that can maintain advantages in cost, stability and isolation mainly adopt a transceiving separation design, which corresponds to the microwave chip using different ports as a transmitting port for outputting an excitation signal and a receiving port for accessing a feedback signal.

[0003] To realize the transceiving separation of the antenna with a transceiving combination structure design and match the microwave chip with a transceiving separation design, the current microwave detection module mainly corresponds to Figure 1A using a 3dB bridge to realize the transceiving separation of the antenna, or using a ring bridge corresponding to Figure 1B to realize the transceiving separation of the antenna. As 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 and uses 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 so that the 3dB bridge 20P is 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 and uses different ports as the transmitting port 301P for outputting the excitation signal and the receiving port 302P for accessing the feedback signal, so that the corresponding impedance of the transmitting port 301P and the receiving port 302P is Z0, and the corresponding impedance of the input end 201P and the isolation end 204P is Z0 / √2. 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 corresponds to realizing the transceiver separation of the antenna 10P designed in a transceiver integrated structure and matching the microwave chip 30P designed in a 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 has reached 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 realizing 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 has reached 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 realizing 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 layout because the ring-shaped electric bridge is equivalent in structure 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 have strict parameter limitation requirements for the length and impedance of the microstrip connecting line between the ports. Therefore, the 3dB electric bridge 20P and the ring-shaped electric bridge are difficult to realize the packaging design in the microwave chip 30P in terms of volume, structural design and parameter limitation requirements. Utility model content

[0005] An object of the utility model is to provide a transceiver integrated microwave chip packaged with an isolator and a microwave detection module, wherein the microwave chip adopts a transceiver integrated design and uses the same antenna port as a transmitting port of an output excitation signal and a receiving port of an access feedback signal, thereby being matched with an antenna adopting a transceiver integrated design, which is conducive to simplifying the feed line layout between the antenna and the microwave chip and ensuring the cost advantage of the microwave detection module and the miniaturization trend of products.

[0006] Another object of the utility model is to provide a transceiver integrated microwave chip packaged with an isolator and a microwave detection module, wherein the microwave chip realizes transceiver integration at a higher isolation degree based on the isolator packaged therein, which ensures the stability and detection precision of the microwave detection module based on the transceiver integration of the microwave chip at a higher isolation degree.

[0007] Another object of the utility model is to provide a transceiver integrated microwave chip packaged with an isolator and a microwave detection module, wherein the isolator has a significantly shortened length of the strip-shaped connecting line relative to a 3dB electric bridge and a ring-shaped electric bridge, thereby being suitable for being packaged in the microwave chip in terms of volume relative to the 3dB electric bridge and the ring-shaped electric bridge.

[0008] Another object of the utility model is to provide a transceiver integrated microwave chip packaged with an isolator and a microwave detection module, wherein the isolator adopts a three-port structure design and can simplify the impedance matching between the ports relative to a 3dB electric bridge and a ring-shaped electric bridge, and has more extensive parameter limitation requirements for the length and impedance of the strip-shaped connecting line between the ports, thereby being suitable for being packaged in the microwave chip in terms of structural design and parameter limitation requirements relative to the 3dB electric bridge and the ring-shaped electric bridge.

[0009] Another purpose of the utility model lies in providing a transceiving integrated microwave chip and microwave detection module encapsulated with an isolator, wherein the isolator has a first port, a second port and a third port, and comprises a first strip connection line connected between the first port and the second port, a second strip connection line connected between the first port and the third port, and a resistance connected between the second port and the third port, wherein the sum of the lengths of the first strip connection line and the second strip connection line approaches one-half wavelength electrical length, corresponding to the isolator having a structure design converging to a Wilkinson power divider but not having the restriction that the first strip connection line and the second strip connection line are designed to be equal length in the original structure range of the Wilkinson power divider, thus having a significantly shortened strip connection line length and more extensive parameter restriction requirement relative to a 3dB electrical bridge and a loop electrical bridge, so as to make the isolator suitable for being encapsulated in the microwave chip in terms of volume, structure design and parameter restriction requirement.

[0010] Another purpose of the utility model lies in providing a transceiving integrated microwave chip and microwave detection module encapsulated with an isolator, wherein the isolator is set in a structure design converging to a Wilkinson power divider, while breaking out of the traditional application thought that the Wilkinson power divider is used as a bidirectional power divider to divide one signal into two signals or combine two signals into one signal, the structure feature that the sum of the lengths of the first strip connection line and the second strip connection line of the Wilkinson power divider approaches one-half wavelength electrical length is utilized, so that an excitation signal transmitted from the second port to the third port through the first strip connection line and the second strip connection line can be opposite-phase cancelled with an excitation signal transmitted to the third port through the resistance, corresponding to the state that the second port of the isolator is electrically connected to an oscillator of the microwave chip, the third port is electrically connected to a mixing circuit of the microwave chip, and the first port is electrically connected to an antenna port, an excitation signal output from the oscillator can be output at the antenna port and isolated from the third port at a higher isolation degree, while a feedback signal accessed from the antenna port can be transmitted to the mixing circuit through the second microstrip line, so as to realize transceiving integration of the microwave chip at a higher isolation degree.

[0011] Another purpose of the utility model lies in providing a transceiving integrated microwave chip and microwave detection module encapsulated with an isolator, wherein the resistance of the isolator is set as the sum of the impedance of the second port and the impedance of the third port, so as to improve the aforementioned isolation degree and ensure the stability and detection precision of the microwave detection module.

[0012] Another purpose of the utility model lies in providing a transceiving integrated microwave chip and microwave detection module packaged with an isolator, wherein the microwave chip realizes transceiving integration under higher isolation based on the isolator packaged therein, wherein the isolator is designed in a structure converging to a Wilkinson power divider, and allows the first strip connection line and the second strip connection line to be designed equally long to be out of the limitation in the original structure range of the Wilkinson power divider, and the isolator has the advantages of low cost, small size, simple structure design and wide parameter limitation requirement, and is easy to package, so that the microwave chip can keep advantages in cost, stability and isolation over the microwave chip designed with transceiving separation, and based on matching with the antenna designed with transceiving integration, the feed line layout between the antenna and the microwave chip is simplified to ensure the cost advantage of the microwave detection module and the miniaturization trend of the product.

[0013] To achieve the above at least one purpose, the utility model provides a transceiving integrated microwave chip packaged with an isolator, the microwave chip has an antenna port and an output port, and is designed with transceiving integration to simultaneously serve as a transmission port of output excitation signal and a receiving port of access feedback signal with the same antenna port, wherein the microwave chip comprises:

[0014] An isolator, wherein the isolator has a first port, a second port and a third port, and comprises a first strip connection line connected between the first port and the second port, a second strip connection line connected between the first port and the third port, and a resistance connected between the second port and the third port, wherein the sum of the lengths of the first strip connection line and the second strip connection line approaches one-half wavelength electrical length within an error range of 20%, and wherein the isolator is electrically connected to the antenna port at the first port;

[0015] An oscillator, wherein the isolator is electrically connected to the oscillator at the second port; and

[0016] A mixing circuit, wherein the isolator is electrically connected to the mixing circuit at the third port, and wherein the mixing circuit is electrically connected to the oscillator and the output port to mix the excitation signal accessed from the oscillator and the feedback signal accessed from the third port, so that the microwave chip can output a signal associated with the mixed output signal of the mixing circuit at the output port.

[0017] In an embodiment, wherein the first strip connection line and the second strip connection line are designed equally long.

[0018] In an embodiment, the first strip line and the second strip line are designed with equal impedance.

[0019] In an embodiment, the resistance is set to the sum of the impedance of the second port and the impedance of the third port.

[0020] In an embodiment, the impedance of the first port, the second port and the third port are all designed as 50Ω, and the resistance is set to 100Ω.

[0021] In an embodiment, the first strip line and the second strip line are designed with different impedance.

[0022] In an embodiment, the first strip line and the second strip line are designed with different length.

[0023] In an embodiment, the microwave chip further comprises at least one power amplifier arranged between the second port and the oscillator, and the second port is electrically connected to the oscillator through the power amplifier.

[0024] In an embodiment, the microwave chip further comprises at least one low noise amplifier arranged between the third port and the mixing circuit, and the third port is electrically connected to the mixing circuit through the low noise amplifier.

[0025] In an embodiment, the microwave chip further comprises at least one functional circuit module arranged between the mixing circuit and the output port, and the mixing circuit is electrically connected to the output port through the functional circuit module, wherein the functional circuit module is arranged as a circuit module with at least one signal processing function of signal amplification, signal conversion and signal analysis, so that the signal output by the mixing circuit can be processed by the functional circuit module and then output at the output port.

[0026] According to another aspect of the present application, the present application further provides a microwave detection module, which comprises:

[0027] The microwave chip as described above; and

[0028] at least one antenna, wherein the antenna is designed as a transceiver structure with the same feeding port serving as both a transmitting feeding port for inputting an excitation signal and a receiving feeding port for outputting a feedback signal, and the antenna is electrically connected to the antenna port of the microwave chip at the feeding port. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1A The structural schematic diagram of a microwave detection module adopting a 3dB bridge to realize the transmit-receive separation of an antenna.

[0030] Figure 1B The structural schematic diagram of a microwave detection module adopting a 3dB bridge to realize the transmit-receive separation of an antenna.

[0031] Figure 2A The structural schematic diagram of a microwave detection module adopting a 3dB bridge to realize the transmit-receive separation of an antenna.

[0032] Figure 2B The structural schematic diagram of a microwave detection module adopting a 3dB bridge to realize the transmit-receive separation of an antenna.

[0033] Figure 2C The structural schematic diagram of a microwave detection module adopting a 3dB bridge to realize the transmit-receive separation of an antenna.

[0034] Figure 3A The structural schematic diagram of a microwave detection module adopting a 3dB bridge to realize the transmit-receive separation of an antenna.

[0035] Figure 3B The structural schematic diagram of a microwave detection module adopting a 3dB bridge to realize the transmit-receive separation of an antenna.

[0036] Figure 4A The structural schematic diagram of a microwave detection module adopting a 3dB bridge to realize the transmit-receive separation of an antenna.

[0037] Figure 4B The structural schematic diagram of a microwave detection module adopting a 3dB bridge to realize the transmit-receive separation of an antenna.

[0038] Figure 5 The structural schematic diagram of a microwave detection module adopting a 3dB bridge to realize the transmit-receive separation of an antenna.

[0039] Figure 6A The structural schematic diagram of a microwave detection module adopting a 3dB bridge to realize the transmit-receive separation of an antenna.

[0040] Figure 6B The structural schematic diagram of a microwave detection module adopting a 3dB bridge to realize the transmit-receive separation of an antenna. DETAILED DESCRIPTION

[0041] The following description is provided to enable any person skilled in the art to practice the present application. The preferred embodiments described below are only examples of the present application and other obvious variants can be thought of by those skilled in the art. The basic principles of the present application defined in the following description can be applied to other embodiments, variants, improvements, equivalents and other technical solutions without departing from the spirit and scope of the present application.

[0042] 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 device or element referred to 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.

[0043] 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.

[0044] The utility model provides a kind of transceiver integration microwave chip and microwave detection module packaged with isolator, wherein the microwave chip adopts transceiver integration design and simultaneously as the transmission port of output excitation signal and the receiving port of access feedback signal with same antenna port, and realizes transceiver integration under higher isolation based on isolator packaged in it, so it can be matched with antenna using transceiver integration design, which is conducive to simplifying the layout of feed line between the antenna using transceiver integration design and the microwave chip, and guaranteeing the cost advantage of corresponding microwave detection module and conforming to the miniaturization trend of product, and the stability and detection precision of microwave detection module are guaranteed based on the transceiver integration of microwave chip under higher isolation.

[0045] For example, referring to the drawings of the specification of the utility model Figure 2A And Figure 2BAs shown, a structure block diagram of a microwave chip and a structure principle diagram of an isolator packaged therein according to an embodiment of the present application are shown respectively, wherein the microwave chip 10 has an antenna port 101 and an output port 102, and comprises an isolator 11, a mixing circuit 12 and an oscillator 13, wherein the microwave chip 10 adopts a transceiver integrated design to simultaneously use the same antenna port 101 as a transmitting port of an output excitation signal and a receiving port of an access feedback signal; wherein the isolator 11 has a first port 1101, a second port 1102 and a third port 1103, and comprises a first strip connection line 111 connected between the first port 1101 and the second port 1102, a second strip connection line 112 connected between the first port 1101 and the third port 1103, and a resistance 113 connected between the second port 1102 and the third port 1103, wherein the sum of the line lengths of the first strip connection line 111 and the second strip connection line 112 approaches one-half wavelength electrical length, corresponding to the isolator 11 having a structure design approaching a Wilkinson power divider to be a three-port structure, but not having the restriction that the first strip connection line 111 and the second strip connection line 112 are designed to be equal length in the original structure range of the Wilkinson power divider, thus having a significantly shortened strip connection line length and a more extensive parameter limitation requirement relative to a 3dB electrical bridge and a ring electrical bridge, so that the isolator 11 is suitable to be packaged in the microwave chip 10 in terms of volume, structure design and parameter limitation requirement; wherein the isolator 11 is electrically connected to the antenna port 101 at the first port 1101, to the oscillator 13 at the second port 1102, and to the mixing circuit 12 at the third port 1103, so that the excitation signal output from the oscillator 13 and sequentially transmitted to the third port 1103 from the second port 1102 through the first strip connection line 111 and the second strip connection line 112 can be opposite-phase cancelled with the excitation signal output from the oscillator 13 and transmitted to the third port 1103 through the resistance 113, corresponding to the excitation signal output from the oscillator 13 being able to be output at the antenna port 101 and isolated from the third port 1103 at a higher isolation degree, while the feedback signal accessed from the antenna port 101 being able to be transmitted to the third port 1103 through the second strip connection line 112, thereby realizing the transceiver integration of the microwave chip 10 at a higher isolation degree.The mixing circuit 12 is further electrically connected to the oscillator 13 and the output port 102, so as to mix the excitation signal accessed from the oscillator 13 and the feedback signal accessed from the third port 1103, and enable the microwave chip 10 to output, at the output port 102, a signal associated with the mixed output signal of the mixing circuit 12.

[0046] Specifically, in this embodiment of the present application, the isolator 11 is provided in the form of a Wilkinson power divider, and the first and second strip connection lines 111 and 112 are provided in equal length.

[0047] It is worth mentioning that, in the conventional application of the Wilkinson power divider, the Wilkinson power divider is used as a bidirectional power divider to input one signal from the first port 1101 and divide the signal into two signals to be output at the second and third ports 1102 and 1103 respectively, or to input two signals from the second and third ports 1102 and 1103 respectively and combine the two signals into one signal to be output at the first port 1101. The particularity lies in the resistor 113 connected between the second and third ports 1102 and 1103, which is used to suppress the imbalance between the output signals caused by the unbalanced state of the first and second strip connection lines 111 and 112.

[0048] That is to say, the application of the Wilkinson power divider in the microwave chip 10 in this embodiment of the utility model breaks the traditional application thought of the Wilkinson power divider as a bidirectional power divider. Specifically in this embodiment of the utility model, the excitation signal output from the oscillator 13 is input to the second port 1102 of the Wilkinson power divider, so that the antenna port 101 electrically connected to the first port 1101 can serve as a transmitting port of the output excitation signal, and the sum of the lengths of the first strip connection line 111 and the second strip connection line 112 of the Wilkinson power divider approaches one-half wavelength electrical length, so that the excitation signal output from the oscillator 13 and transmitted to the third port 1103 through the first strip connection line 111 and the second strip connection line 112 from the second port 1102 can be cancelled with the excitation signal output from the oscillator 13 and transmitted to the third port 1103 through the resistor 113, so that the excitation signal output from the oscillator 13 can be output at the antenna port 101 and isolated from the third port 1103 at a higher isolation degree, while the feedback signal accessed through the antenna port 101 as a receiving port can be transmitted to the third port 1103 through the second microstrip line 112, so that the microwave chip 10 realizes transceiver integration at a higher isolation degree.

[0049] In addition, it is worth mentioning that the isolator 11 can realize the transceiver integration of the microwave chip 10 at a higher isolation degree with the antenna port 101 serving as a transmitting port of the output excitation signal and a receiving port of the accessed feedback signal at the same time by being electrically connected to the antenna port 101 at the first port 1101, to the oscillator 13 at the second port 1102, and to the mixing circuit 12 at the third port 1103. That is to say, in order to make the excitation signal output from the oscillator 13 be output at the antenna port 101 and isolated from the third port 1103 at a higher isolation degree, the isolator 11 needs to establish the above-mentioned electrical connection relationship with the antenna port 101, the mixing circuit 12, and the oscillator 13 based on the corresponding circuit connection structure or circuit coupling structure, and does not need to achieve this purpose based on additional electrical connection relationship. Thus, the packaging of the isolator 11 in the microwave chip 10 is easy to realize, and the microwave chip 10 can maintain advantages in cost, stability, and isolation degree compared with microwave chips adopting transceiver separation design, and based on matching with antennas adopting transceiver integration design, the layout of the feed line between the antenna and the microwave chip is simplified to ensure the cost advantage of the microwave detection module and adapt to the miniaturization trend of products.

[0050] Those skilled in the art can understand that the mixing circuit 12 accesses the excitation signal from the oscillator 13 and the feedback signal from the third port 1103 at different ports respectively, so it is necessary to ensure that the port accessing the feedback signal is isolated from the excitation signal, and the excitation signal output from the oscillator 13 to the second port 1102 and the mixing circuit 12 can be output from the same port of the oscillator 13 and transmitted to the second port 1102 and the mixing circuit 12 respectively in two ways, or can be transmitted to the second port 1102 and the mixing circuit 12 respectively from different ports of the oscillator 13. Wherein the excitation signal output from the oscillator 13 to the mixing circuit 12 is usually called local oscillator signal, that is, those skilled in the art usually distinguish the transmission object of the signal output from the oscillator 13 based on the different names of excitation signal and local oscillator signal, and in the description of the utility model, the naming of the excitation signal does not have the limiting meaning of its transmission object.

[0051] It is worth mentioning that the first strip connection line 111 and the second strip connection line 112 are strip conductors packaged in the microwave chip 10, wherein the specific form of the first strip connection line 111 and the second strip connection line 112 in the form of strip conductor is various based on different packaging layouts, and the utility model does not limit this. For example, based on the purpose of reducing the packaging volume of the isolator 11, the first strip connection line 111 and the second strip connection line 112 can be designed in the form of spiral structure, S-shaped structure, Z-shaped structure and the like, and the packaging volume of the isolator 11 can be further reduced based on the structure design of staggered layering, for example, the first strip connection line 111 and the second strip connection line 112 are designed in the form of staggered layering in spiral structure, as long as the sum of the lengths of the first strip connection line 111 and the second strip connection line 112 tends to one-half wavelength electrical length. Wherein the identification of the sum of the lengths of the first strip connection line 111 and the second strip connection line 112 is affected by the material carrying the first strip connection line 111 and the second strip connection line 112, which allows an error range of 20%, and the sum of the lengths of the first strip connection line 111 and the second strip connection line 112 tends to one-half wavelength electrical length within the error range of 20%.

[0052] Specifically, the traditional wavelength λ satisfies c = λf, where c is the speed of light, and the wavelength electrical length is the ratio of the actual physical length of the stripline and the wavelength of the signal transmitted on the stripline, which is affected by the electrical properties of the stripline itself and the environmental medium (such as the material carrying the stripline) and is distinguished from the traditional wavelength λ. In the microwave chip 10 of the present application, when the actual physical length of the first stripline 111 and the second stripline 112 and the wavelength electrical length are converted, the frequency f of the transmitted signal, the actual physical length L of the microstrip, the dielectric constant ε of the substrate material of the stripline, and the speed of light c are substituted into the formula r to calculate the wavelength electrical length of the stripline.

[0053] Further, in this embodiment of the present application, the first stripline 111 and the second stripline 112 are designed with equal impedance, and the first stripline 111 and the second stripline 112 corresponding to the stripline have the same line width, which is advantageous to simplify the structure design of the isolator 11 and the impedance matching design between the first port 1101 and the antenna port 101, between the second port 1102 and the oscillator 13, and between the third port 1103 and the mixing circuit 12 of the isolator 11.

[0054] In particular, the isolator 11 preferably corresponds to the original structure of the Wilkinson power divider, and the resistance value of the resistor 113 is set to the sum of the impedance of the second port 1102 and the impedance of the third port 1103. Corresponding to the state that the first stripline 111 and the second stripline 112 are designed with equal impedance, to further simplify the impedance matching design of the isolator 11, in this embodiment of the present application, the second port 1102 and the third port 1103 are also designed with equal impedance.

[0055] Further, to ensure the compatibility of the microwave chip 10, in this embodiment of the present application, the impedance of the first port 1101, the second port 1102 and the third port 1103 is designed as 50Ω, and the resistance value of the resistor 113 is set to 100Ω.

[0056] Further, referring to the drawings of the present application Figure 2C Further, to further demonstrate the high isolation advantage of the microwave chip 10 of the present application, corresponding to Figure 2B ​The S-parameter curve between the second port 1102 and the third port 1103 of the isolator 11 is simulated, corresponding to the S-parameter associated with the energy proportion of the excitation signal output by the third port 1103 at the frequency point of 5.8 GHz being as low as-30 dB or below under the simulation condition that the second port 1102 accesses the excitation signal, corresponding to the state that the isolator 11 is in that the first port 1101 is electrically connected to the antenna port 101, the second port 1102 is electrically connected to the oscillator 13, and the third port 1103 is electrically connected to the mixing circuit 12, the excitation signal output by the oscillator 13 can be output at the antenna port 101 and isolated from the third port 1103 at a higher isolation degree, and the feedback signal accessed by the antenna port 101 as a receiving port at the same time can be transmitted to the third port 1103 through the second microstrip line 112, thereby realizing the transceiver integration of the microwave chip 10 at a higher isolation degree.

[0057] It is worth mentioning that the structure feature that the first strip connection line 111 and the second strip connection line 112 are designed with equal impedance is neither a limitation of the original structure range of the Wilkinson power divider nor a structural limitation of the isolator 11 in the microwave chip 10 of the utility model, and in other embodiments of the utility model, the first strip connection line 111 and the second strip connection line 112 can also be designed with different impedances to have more flexible impedance matching structures and more extensive parameter limitation requirements relative to 3 dB bridges and loop bridges, which is conducive to guaranteeing the flexibility of the structural design of the isolator 11 and being applicable to different structural and functional design requirements.

[0058] For example, referring to the structure of the isolator 11 in which the first strip connection line 111 and the second strip connection line 112 are designed with different impedances, the S-parameter curve between the second port 1102 and the third port 1103 of the isolator 11 corresponding to the structure is illustrated. Figure 3A and Figure 3B For example, referring to the structure of the isolator 11 in which the first strip connection line 111 and the second strip connection line 112 are designed with different impedances, the S-parameter curve between the second port 1102 and the third port 1103 of the isolator 11 corresponding to the structure is illustrated.

[0059] Specifically, corresponding to the structure of the isolator 11 in which the first strip connection line 111 and the second strip connection line 112 are designed with different impedances, the S-parameter curve between the second port 1102 and the third port 1103 of the isolator 11 corresponding to the structure is illustrated. Figure 3AIn the isolator 11, the impedance of the first strip connection line 111 is greater than the impedance of the second strip connection line 112, and the line width of the first strip connection line 111 is narrower than the line width of the second strip connection line 112. In this way, when the first port 1101 of the isolator 11 is electrically connected to the antenna port 101, the second port 1102 is electrically connected to the oscillator 13, and the third port 1103 is electrically connected to the mixing circuit 12, the feedback signal accessed through the antenna port 101 as a receiving port can be transmitted to the mixing circuit 12 through the second strip connection line 112 with a larger power division ratio, thereby improving the detection accuracy of the microwave chip 10 when applied to the corresponding microwave detection module.

[0060] In the state where the impedance of the first strip connection line 111 is greater than the impedance of the second strip connection line 112, the S-parameter curve between the second port 1102 and the third port 1103 of the isolator 11 is as shown in Figure 3B In the state where the impedance of the first strip connection line 111 is greater than the impedance of the second strip connection line 112, the S-parameter curve between the second port 1102 and the third port 1103 of the isolator 11 is as shown in

[0061] It is worth mentioning that, when the isolator 11 is configured as a Wilkinson power divider, the first stripline connecting line 111 and the second stripline connecting line 112 of the isolator 11 are set to the same length corresponding to the original structural range of the Wilkinson power divider. The structural feature of the first stripline connecting line 111 and the second stripline connecting line 112 being designed to the same length is a limiting feature based on the original structural range of the Wilkinson power divider, but it does not constitute a limitation on the isolator 11 in the microwave chip 10 of this invention. That is, the isolator 11 in the microwave chip 10 of this invention, as described above, has a structural design similar to that of a Wilkinson power divider and is a three-port structure, but it does not have the limitation of the first stripline connecting line 111 and the second stripline connecting line 112 being designed to the same length in the original structural range of the Wilkinson power divider. Corresponding to some embodiments of this invention, the first stripline connecting line 111 and the second stripline connecting line 112 of the isolator 11 may optionally correspond to... Figure 4A Designed with different lengths, the S-parameter curves between the second port 1102 and the third port 1103 of the isolator 11 are as follows: Figure 4B As shown, under the simulation condition where the excitation signal is connected to the second port 1102, the S-parameter associated with the energy ratio of the excitation signal output by the third port 1103 at the 5.8GHz frequency point is as low as -26dB.

[0062] In particular, refer to the accompanying drawings in the specification of this utility model. Figure 5 As shown, a further structural block diagram of the microwave chip 10 according to the above embodiment of the present invention is illustrated. The microwave chip 10 further includes at least one power amplifier 14 disposed between the second port 1102 and the oscillator 13. The second port 1102 is electrically connected to the oscillator 13 via the power amplifier 14, so that the excitation signal output from the oscillator 13 can be amplified by the power amplifier 14 and transmitted to the second port 1102 of the isolator 11.

[0063] Furthermore, the microwave chip 10 corresponds to Figure 5 It also includes at least one low-noise amplifier 15 disposed between the third port 1103 and the mixer circuit 12, with the third port 1103 electrically connected to the mixer circuit 12 via the low-noise amplifier 15, so that the feedback signal received from the antenna port 101 can be transmitted to the third port 1103 via the second microstrip line 112 and then amplified by the low-noise amplifier 15 before being transmitted to the mixer circuit 12.

[0064] It is worth mentioning that the microwave chip 10 corresponds to Figure 5 Further comprising at least one function circuit module 16 arranged between the mixing circuit 12 and the output port 102, corresponding to the mixing circuit 12 being electrically connected to the output port 102 through the function circuit module 16, wherein the function circuit module 16 is arranged as a circuit module with at least one signal processing function of signal amplification, signal filtering, signal conversion and signal analysis, so that the mixed output signal of the mixing circuit 12 can be output at the output port 102 after corresponding signal processing by the function circuit module 16, and the signal associated with the mixed output signal of the mixing circuit 12.

[0065] For example, the function circuit module 16 can be arranged as one of an amplification circuit with signal amplification processing function, a filtering circuit with signal filtering processing function, an ADC conversion circuit with signal conversion processing function, and an MCU module with signal analysis processing function, and the present application does not limit this.

[0066] That is, in the description of the present application, the signal output at the output port 102 of the microwave chip 10 can be an intermediate frequency signal mixed and output, or a signal processed by at least one of filtering, amplification and analog-to-digital conversion, or a signal / data output after the intermediate frequency signal is analyzed and processed by a processor with signal analysis processing function, and thus is associated with the mixed output signal of the mixing circuit 12.

[0067] Further referring to the structural block diagram of the microwave chip 10 when applied to the corresponding microwave detection module shown in the accompanying drawings of the present application Figure 6A and Figure 6B The microwave chip 10 is shown in the structural block diagram when applied to the corresponding microwave detection module, wherein the microwave detection module comprises the microwave chip 10 and at least one antenna 20 fed to the antenna port 101 of the microwave chip 10, wherein the antenna 20 adopts a transceiver integrated structure design to simultaneously serve as a transmission feeding port for accessing an excitation signal and a receiving feeding port for outputting a feedback signal with the same feeding port 201, corresponding to the antenna 20 being fed to the antenna port 101 of the microwave chip 10 at the feeding port 201.

[0068] It is worth mentioning that in the state that the antenna 20 adopts a transceiver integrated structure design to simultaneously serve as a transmission feeding port for accessing an excitation signal and a receiving feeding port for outputting a feedback signal with the same feeding port 201, the specific type and structure of the antenna 20 (including the number of feeding ports and the structure of the feeding ports corresponding to different feeding modes) do not constitute a limitation on the present application.

[0069] For example, in the state that the antenna 20 is provided as a microstrip antenna (also known as a flat antenna), the antenna 20 has one or more feed ports, and the same feed port 201 is connected to the antenna port 101 of the microwave chip 10 as a transmitting feed port for accessing an excitation signal and a receiving feed port for outputting a feedback signal.

[0070] That is, the specific type and structure of the antenna 20 do not constitute a limitation on the microwave detection module of the present application. In the microwave detection module of the present application, the antenna 20 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, as long as the antenna 20 adopts a transceiver integrated structure design to use the same feed port 201 as a transmitting feed port for accessing an excitation signal and a receiving feed port for outputting a feedback signal.

[0071] In addition, in the state that the antenna 20 adopts a transceiver integrated structure design to use the same feed port 201 as a transmitting feed port for accessing an excitation signal and a receiving feed port for outputting a feedback signal, the antenna 20 can also correspond to Figure 6B be designed as an array antenna composed of multiple antenna units of the same type or different types, and each antenna unit adopts a transceiver integrated structure design to use the same feed port 201 as a transmitting feed port for accessing an excitation signal and a receiving feed port for outputting a feedback signal, wherein the feed port 201 of each antenna unit is connected to the antenna port 101 of the microwave chip 10 in a concentrated manner, and the antenna 20 still meets the description of "adopting a transceiver integrated structure design to use the same feed port 201 as a transmitting feed port for accessing an excitation signal and a receiving feed port for outputting a feedback signal".

[0072] Those skilled in the art can understand that the above embodiments are only examples, and 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 present application but are not explicitly indicated in the drawings.

[0073] Those skilled in the art should understand that the embodiments of the present application shown in the above description and drawings are only examples and do not limit the present application. The purpose of the present application has been completely and effectively achieved. The function and structural principle of the present application have been shown and described in the embodiments, and the embodiments of the present application can be any modification or modification without departing from the principle.

Claims

1. A transceiver microwave chip packaged with an isolator, characterized in that, The microwave chip has an antenna port and an output port, and adopts a transceiver integrated design to use the same antenna port as a transmission port for outputting an excitation signal and a reception port for accessing a feedback signal, wherein the microwave chip comprises: an isolator, wherein the isolator has a first port, a second port and a third port, and comprises a first strip line connected between the first port and the second port, a second strip line connected between the first port and the third port, and a resistor connected between the second port and the third port, wherein the sum of the lengths of the first strip line and the second strip line approaches one-half of the electrical wavelength within an error range of 20%, and wherein the isolator is electrically connected to the antenna port at the first port; an oscillator, wherein the isolator is electrically connected to the oscillator at the second port; and a mixer circuit, wherein the isolator is electrically connected to the mixer circuit at the third port, and wherein the mixer circuit is electrically connected to the oscillator and the output port to mix the excitation signal accessed from the oscillator and the feedback signal accessed from the third port, so that the microwave chip can output a signal associated with the mixed output of the mixer circuit at the output port.

2. The transceiver integrated microwave chip packaged with an isolator according to claim 1, wherein the first strip line and the second strip line are designed to be equal in length.

3. The transceiver integrated microwave chip packaged with an isolator according to claim 2, wherein the first strip line and the second strip line are designed to be equal in impedance.

4. The transceiver integrated microwave chip packaged with an isolator according to claim 3, wherein the resistance of the resistor is set to be the sum of the impedance of the second port and the impedance of the third port.

5. The transceiver integrated microwave chip packaged with an isolator according to claim 4, wherein the impedance of the first port, the second port and the third port are all designed to be 50Ω, and the resistance of the resistor is set to be 100Ω.

6. The transceiver integrated microwave chip packaged with an isolator according to claim 2, wherein the first strip line and the second strip line are designed to be different in impedance.

7. The transceiver integrated microwave chip packaged with an isolator according to claim 1, wherein the first strip line and the second strip line are designed to be different in length.

8. The transceiver integrated microwave chip packaged with an isolator according to any one of claims 1 to 7, wherein the microwave chip further comprises at least one power amplifier arranged between the second port and the oscillator, and the second port is electrically connected to the oscillator via the power amplifier.

9. The isolator-packaged transceiver microwave chip of claim 8, wherein the microwave chip further comprises at least one low noise amplifier disposed between the third port and the mixing circuit, and the third port is electrically connected to the mixing circuit via the low noise amplifier.

10. The isolator-packaged transceiver microwave chip of claim 9, wherein the microwave chip further comprises at least one functional circuit module disposed between the mixing circuit and the output port, and the mixing circuit is electrically connected to the output port via the functional circuit module, wherein the functional circuit module is configured to have at least one of signal amplification, signal conversion, and signal analysis functions, so that the signal outputted from the mixing circuit can be processed by the functional circuit module and then outputted from the output port as a signal associated with the signal outputted from the mixing circuit.

11. A microwave probe module characterized by, including: the isolator-packaged transceiver microwave chip of any one of claims 1 to 10; and at least one antenna, wherein the antenna is designed in a transceiver structure to have the same feeding port as a transmitting feeding port for accessing an excitation signal and a receiving feeding port for outputting a feedback signal, and the antenna is fedly connected to the antenna port of the microwave chip at the feeding port. ​

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