CN218647146U

CN218647146U - Receiving-transmitting integrated microwave detection chip and microwave detection module

Info

Publication number: CN218647146U
Application number: CN202222200880.XU
Authority: CN
Inventors: 邹高迪; 邹明志; 邹新
Original assignee: Shenzhen Merrytek Technology Co Ltd
Current assignee: Shenzhen Merrytek Technology Co Ltd
Priority date: 2022-08-12
Filing date: 2022-08-19
Publication date: 2023-03-17
Anticipated expiration: 2032-08-19
Also published as: CN218158331U; CN218455793U; CN115598631A

Abstract

The utility model provides a receiving and dispatching microwave detection chip and microwave detection module of unification, wherein the receiving and dispatching microwave detection chip of unification has a radio frequency port that is used for providing excitation signal and receiving echo signal to in microwave detection based on the Doppler effect principle is used, through the radio frequency port is right with the feed connection of corresponding antenna realizes simultaneously the transmission feed and the receiving feed of antenna and form the antenna system of receiving and dispatching unification, avoided the use of external microstrip line electric bridge and schottky diode and can simplify the circuit layout of microwave detection module and be adapted to miniaturized trend, be favorable to the guarantee simultaneously the interference killing feature of microwave detection module and reduction the cost of microwave detection module.

Description

Transmit-receive integrated microwave detection chip and microwave detection module

Technical Field

The utility model relates to a microwave detection field, in particular to receiving and dispatching microwave detection chip and microwave detection module of unification.

Background

With the development of the internet of things technology, the requirements of artificial intelligence, smart home and intelligent security technology on environment detection, particularly on detection accuracy of human existence, movement and micro motion are higher and higher, and accurate judgment basis can be provided for intelligent terminal equipment only by acquiring a stable enough detection result. The microwave detection technology based on the Doppler effect principle is used as a person and an object, and an important junction connected between the object and the object has unique advantages in behavior detection and existence detection technology, can detect moving objects such as action characteristics, movement characteristics and micro-movement characteristics of the person and even heartbeat and respiration characteristic information of the person under the condition of not invading the privacy of the person, and has wide application prospect. Specifically, a microwave detector is fed by an excitation signal to emit a microwave beam with a frequency corresponding to the excitation signal to the target space, so as to form a detection region in the target space, and a reflected echo formed by the microwave beam reflected by a corresponding object in the detection region is received to transmit an echo signal corresponding to the frequency of the reflected echo to a mixer detection unit, wherein the mixer detection unit mixes the excitation signal and the echo signal to output a doppler intermediate frequency signal corresponding to a frequency/phase difference between the excitation signal and the echo signal, wherein based on the doppler effect principle, when the object reflecting the microwave beam is in a moving state, the echo signal and the excitation signal have a certain frequency/phase difference and the doppler intermediate frequency signal exhibits corresponding amplitude fluctuation to feed back human body activity.

In order to ensure the accuracy of the doppler intermediate frequency signal to improve the accuracy of the doppler intermediate frequency signal in feedback to human body activities, the isolation of the antenna system of the microwave detector must be ensured, wherein the isolation refers to the ratio of the power of a signal leaking from a transmitting feed end to a receiving feed end in one antenna system to the input power. That is, the less signals an antenna receives that antenna or the other antenna transmits, the better the isolation between the transmit and receive feeds of the antenna or between the two antennas, and the lower the degree of mutual interference. Generally, a transmit-receive separation mode is adopted to obtain a better isolation, for example, the feed ends of different antennas are respectively used as a transmit feed end and a receive feed end of an antenna system, or two feed ends in an orthogonal relation on the same antenna are respectively used as a transmit feed end and a receive feed end of the antenna system, so that transmit-receive separation is realized.

Specifically, as shown in fig. 1A to fig. 2, taking a planar patch antenna 10P commonly used in the microwave detection field as an example, the planar patch antenna 10P includes a ground reference 11P and a radiation source 12P spaced from the ground reference 11P, wherein a feeding end 121P of the planar patch antenna 10P is located at a position of the radiation source 12P deviated from a physical center point thereof.

When the feeding ends 121P of the two planar patch antennas 10P are respectively used as the transmitting feeding end and the receiving feeding end of the antenna system to realize the transceiving separation, the two planar patch antennas 10P are disposed in a manner of sharing the reference ground 11P, wherein the two radiation sources 12P have the arrangement modes respectively corresponding to the schematic arrangements shown in fig. 1A and 1B according to the parallel and orthogonal relations of the polarization directions of the two planar patch antennas 10P, wherein the polarization direction of the planar patch antenna 10P corresponds to the direction from the feeding end 121P of the radiation source 12P to the physical central point. In detail, when the polarization directions of the two planar patch antennas 10P are parallel to each other with respect to fig. 1A, in order to ensure the isolation between the two planar patch antennas 10P, the arrangement of the two radiation sources 12P needs to satisfy a longer distance. Thus, the requirement for the separation distance between the two radiation sources 12P is not favorable for the miniaturization of the antenna system; on the other hand, the requirement for the distance between the two radiation sources 12P may also increase the distance between the transmitting feed terminal and the receiving feed terminal of the antenna system, which may cause the extension of the high-frequency microstrip feed line on the circuit layout, thereby reducing the anti-interference capability of the antenna system. When the polarization directions of the two planar patch antennas 10P are orthogonal to each other as shown in fig. 1B, although the distance between the two radiation sources 12P can be reduced based on the orthogonal relationship between the polarization directions of the two planar patch antennas 10P, the arrangement of the two radiation sources 12P is required to satisfy the orthogonal relationship between the polarization directions of the two planar patch antennas 10P, which is not favorable for the miniaturization of the antenna system; on the other hand, the distance between the two feeding ends 121P of the two radiation sources 12P is limited by the arrangement of the two radiation sources 12P, and cannot be shortened, that is, a longer distance still exists between the transmitting feeding end and the receiving feeding end of the antenna system, and accordingly, the high-frequency microstrip feeding line cannot be shortened on the circuit layout, and the interference resistance of the antenna system is difficult to guarantee. That is to say, when the feeding ends 121P of the two planar patch antennas 10P are respectively used as the transmitting feeding end and the receiving feeding end of the antenna system to realize the transceiving separation, no matter the arrangement mode of the two radiation sources 12P satisfies that the polarization directions of the two planar patch antennas 10P are in parallel relation or the polarization directions of the two planar patch antennas 10P are in orthogonal relation, the corresponding antenna system is limited by the number and the arrangement mode of the radiation sources 12P to have larger sizes, and the sizes of the radiation sources 12P are inversely proportional to the operating frequency of the antenna system, which is particularly not favorable for the miniaturization of the antenna system operating in the ISM frequency band of 5.8 GHz; in addition, a longer distance exists between the transmitting feed end and the receiving feed end of the antenna system, and the high-frequency microstrip feed line cannot be shortened correspondingly in circuit layout, so that the anti-interference capability of the antenna system is difficult to guarantee.

Corresponding to fig. 2, when the two feeding ends 121P in the orthogonal relationship on the same planar patch antenna 10P are respectively used as the transmitting feeding end and the receiving feeding end of the antenna system to realize the transceiving separation, the connection lines between the two feeding ends 121P in the orthogonal relationship on the planar patch antenna 10P and the physical central point of the radiation source 12P are perpendicular to each other, so that the two feeding ends 121P of the planar patch antenna 10P still have a longer distance around the radiation source 12P, and accordingly, the high-frequency microstrip feeding line cannot be shortened on the circuit layout, and the anti-interference capability of the antenna system is difficult to guarantee. In addition, when the two feeding ends 121P in an orthogonal relationship on the same planar patch antenna 10P are respectively used as a transmitting feeding end and a receiving feeding end of an antenna system to realize transmit-receive separation, although the isolation between the transmitting feeding end and the receiving feeding end of the antenna system can be ensured based on the orthogonal relationship between the two feeding ends 121P, the strength of the echo signal output by the receiving feeding end of the antenna system is also limited by the fact that the orthogonal relationship between the two feeding ends 121P is reduced, and therefore the accuracy of feedback of the corresponding doppler intermediate frequency signal to the weak movement of the human body is not favorable.

In view of this, in the trend of miniaturization, the antenna system corresponding to the transceiving of fig. 3 is more likely to be adopted, and the same feeding end on the same antenna is used as the transmitting feeding end and the receiving feeding end of the antenna system at the same time. On this basis, in order to ensure the isolation of the antenna system, a microstrip bridge 141P, such as a 3dB bridge or a ring bridge, is usually disposed in the mixer-detector unit 14P, so as to generate a mixing output between two ports of such microstrip bridge 141P having isolation characteristics based on the nonlinear characteristics of the mixing diode 142P, wherein the microstrip bridge 141P cannot be designed in an integrated circuit form due to the structural characteristics of the microstrip bridge 141P. Therefore, in the trend of integration, the present microwave chip 13P is configured in a dual rf port form with separate transmitting and receiving ports corresponding to fig. 1A to 2 for providing the excitation signal and receiving the echo signal, or in a single transmitting port (TX) form corresponding to fig. 3 for outputting the doppler intermediate frequency signal based on the external arrangement of the mixer-detector unit provided with the microstrip line bridge. However, on the one hand, due to the structural characteristics of the microstrip line bridge 141P of the external mixing detector unit 14P, the volume of the mixing detector unit 14P is large, which is not favorable for the miniaturization of the antenna system; on the other hand, the microstrip bridge 141P is used as a microstrip carrier for transmitting the high-frequency excitation signal and the high-frequency echo signal, which is easy to generate electromagnetic radiation interference and receive external electromagnetic radiation interference, so that it is difficult to ensure the anti-interference capability of the antenna system, and accordingly, the mixing detection unit 14P generally needs to be disposed on a different side of the reference ground from the radiation source to form a state where the microstrip bridge 141P and the radiation source are shielded by the reference ground at intervals, so as to reduce the interference of the microstrip bridge to the radiation source, but this kind of layout manner undoubtedly increases the wiring difficulty, and needs additional shielding measures to ensure the electromagnetic shielding effect between the microstrip bridge and other circuits and external electromagnetic radiation, so that the structure is complex, and meanwhile, the connection between the radiation source and the microstrip bridge also damages the integrity of the reference ground, which is detrimental to the stability and the anti-interference capability of the antenna system; in addition, the mixer diode of the external mixer-detector unit usually uses a schottky diode and has a high cost.

In summary, under the trend of miniaturization and integration, the development of the integrated transceiver microwave detection chip is significant for the miniaturization of the corresponding microwave detection module, the use of the microstrip line bridge can be avoided, the circuit layout of the microwave detection module can be simplified, the anti-interference capability of the microwave detection module can be guaranteed, meanwhile, in the state that the microwave chip adopts the integrated transceiver port design, the integrated transceiver microwave detection chip and the corresponding radiation source can be in feed connection in the same side of the reference ground in the form of sharing the reference ground to form the integrated transceiver antenna system, and the high-frequency microstrip feed line between the corresponding radiation source and the integrated transceiver microwave detection chip can be shortened to the greatest extent to guarantee the anti-interference capability of the antenna system.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a receiving and dispatching microwave detection chip and microwave detection module of unification, wherein receiving and dispatching microwave detection chip of unification has a radio frequency port that is used for providing excitation signal and receives echo signal to in microwave detection based on the doppler effect principle is used, through the radio frequency port is realized right with the feed connection of corresponding antenna simultaneously the transmission feed and the receipt feed of antenna form the antenna system of receiving and dispatching unification.

An object of the utility model is to provide a receiving and dispatching microwave detection chip and microwave detection module of unification, wherein the receiving and dispatching microwave detection chip of unification is arranged in microwave detection based on the doppler effect principle is used, through the radio frequency port is right with the feed connection of corresponding antenna realizes simultaneously the transmission feed and the receiving feed of antenna and form the antenna system of receiving and dispatching unification, has avoided the use of external microstrip line electric bridge and schottky diode and can simplify the circuit layout of microwave detection module and be adapted to miniaturized trend, is favorable to the guarantee simultaneously the interference killing feature of microwave detection module and reduction the cost of microwave detection module.

An object of the utility model is to provide a receiving and dispatching microwave detection chip and microwave detection module of unification, wherein the receiving and dispatching microwave detection chip of unification can be with the radiation source of corresponding antenna in the same one side with the sharing of referring to ground the form feed connection and the realization simultaneously of referring to ground are right the transmission feed and the receipt feed of antenna, therefore can simplify the circuit layout of microwave detection module, and shorten the receiving and dispatching microwave detection chip of unification with high frequency microstrip feed circuit between the radiation source and guarantee the interference killing feature of microwave detection module.

An object of the utility model is to provide a receiving and dispatching microwave detection chip and microwave detection module of unification, wherein the receiving and dispatching microwave detection chip of unification can be with the radiation source of corresponding antenna in the same one side with the sharing of referring to ground form feed connection and realization simultaneously right the transmission feed and the receipt feed of antenna, then the microwave detection module can bear with the two-sided circuit board of individual layer the antenna with receiving and dispatching microwave detection chip and corresponding circuit of unification are favorable to reducing the cost of microwave detection module.

An object of the utility model is to provide a receiving and dispatching microwave detection chip and microwave detection module of unification, wherein the receiving and dispatching microwave detection chip of unification can be with the radiation source of corresponding antenna in the same one side with the sharing of referring to the ground form feed connection and realization simultaneously right the transmission feed and the receipt feed of antenna, then the antenna the radiation source is in the perpendicular to the projection of referring to the ground direction corresponds the regional integrality of referring to the ground can be ensured and be favorable to the guarantee the interference killing feature and the stability of microwave detection module.

An object of the utility model is to provide a receiving and dispatching microwave detection chip and microwave detection module of unification, wherein receiving and dispatching microwave detection chip of unification and the radiation source of corresponding antenna are in the same one side with the sharing of referring to the ground the form feed connection's of referring to the ground state, receiving and dispatching microwave detection chip of unification with high frequency microstrip feeder circuit between the radiation source can be shortened with the reduction interference between high frequency microstrip feeder circuit and other circuits, so that other circuits of microwave detection module can with the radiation source with receiving and dispatching microwave detection chip of unification is set up in referring to ground same one side, therefore simplifying in the line layout of microwave detection module, can ensure whole integrality of referring to the ground and guarantee the ability and the stability of microwave detection module are anti-interference.

An object of the utility model is to provide a receiving and dispatching microwave detection chip and microwave detection module of unification, wherein be in other circuits of microwave detection module with the radiation source with receiving and dispatching microwave detection chip of unification set up in refer to ground with the state of one side, the microwave detection module is suitable for being installed in order to reduce with the mode of subsides dress the mounting height of microwave detection module and further be adapted to miniaturized trend, is favorable to simplifying simultaneously the installation of microwave detection module.

An object of the utility model is to provide a receiving and dispatching microwave detection chip and microwave detection module of unification, wherein the receiving and dispatching microwave detection chip of unification is with one the radio frequency port provides excitation signal and receipt echo signal simultaneously, therefore is favorable to reducing the port pin number of the receiving and dispatching microwave detection chip of unification is simplifying can improve in the structural design of the receiving and dispatching microwave detection chip of unification the integrated level of the receiving and dispatching microwave detection chip of unification.

For realizing above at least an objective, according to the utility model discloses an aspect, the utility model provides a microwave detection chip of receiving and dispatching unification, the microwave detection chip of receiving and dispatching unification has a power port, an output port and be used for providing excitation signal and receiving echo signal's a radio frequency port to in microwave detection based on the doppler effect principle is used, lie in the state that power port is supplied power, through feed connection between radio frequency port and the corresponding antenna realizes simultaneously with the mode of receiving and dispatching unification that the transmission of antenna is presented and is received the feed, and in output port output corresponding doppler intermediate frequency signal or based on the control signal that doppler intermediate frequency signal formed, wherein the microwave detection chip of receiving and dispatching unification includes:

the oscillator is provided with an excitation signal output end, a local oscillation signal output end and a power supply end electrically connected with the power supply port, and is arranged in a state that the power supply end is powered through the power supply port, and the excitation signal and the local oscillation signal with the same frequency are respectively output from the excitation signal output end and the local oscillation signal output end;

a mixer, wherein the mixer has an echo signal input terminal, a local oscillator signal input terminal, and a doppler intermediate frequency signal output terminal electrically connected to the output port, and is configured to output the doppler intermediate frequency signal corresponding to a frequency/phase difference between the echo signal input terminal and the local oscillator signal at the echo signal input terminal and at the local oscillator signal input terminal, wherein the local oscillator signal input terminal is electrically connected to the local oscillator signal output terminal of the oscillator, so as to form a transmission channel capable of transmitting an electrical signal between the local oscillator signal output terminal and the local oscillator signal input terminal, and to access the local oscillator signal output from the local oscillator signal output terminal at the local oscillator signal input terminal;

a phase shifter, wherein the rf port is electrically connected to the excitation signal output terminal of the oscillator and the echo signal input terminal of the mixer respectively, so as to form transmission channels capable of transmitting electrical signals between the rf port and the excitation signal output terminal and the echo signal input terminal respectively, wherein at least one of the transmission channels between the rf port and the excitation signal output terminal and the echo signal input terminal and the transmission channels between the lo signal output terminal and the lo signal input terminal is provided with the phase shifter, so as to form an intrinsic phase difference between an echo signal accessed by the echo signal input terminal and an lo signal accessed by the lo signal input terminal and an intrinsic phase difference between an echo signal accessed by the echo signal input terminal and an excitation signal output by the excitation signal output terminal in a state where the rf port is fed to the antenna to access the echo signal; and

an amplifier, wherein the amplifier is disposed in the transmission channel between the radio frequency port and the excitation signal output.

In an embodiment, the phase shifter is an on-chip microstrip inductor disposed in a staggered/spiral-wound microstrip coil configuration.

In an embodiment, the phase shifter is implemented as a microstrip coupled line and has a first microstrip coil, a second microstrip coil and a three-port impedance matching circuit, wherein the first microstrip coil is disposed in the transmission channel between the rf port and the excitation signal output terminal, the second microstrip coil is disposed between an input terminal and a ground terminal of the three-port impedance matching circuit in a state of being electrically coupled to the first microstrip coil, an output terminal of the three-port impedance matching circuit is electrically connected to the echo signal input terminal of the mixer, wherein the three-port impedance matching circuit includes a resistor and a capacitor having one end electrically connected to the resistor, wherein the three-port impedance matching circuit has two ends of the resistor as the input terminal and the output terminal, and the other end of the capacitor as the ground terminal.

In one embodiment, the phase shifter is implemented as a microstrip coupled line having a first microstrip coil disposed in the transmission channel between the rf port and the echo signal input terminal, a second microstrip coil disposed between the output terminal and the ground terminal of the three-port impedance matching circuit in an electrically coupled state with the first microstrip coil, and a three-port impedance matching circuit having a resistor and a capacitor electrically connected to the resistor at one end, wherein the three-port impedance matching circuit has two ends of the resistor as the input terminal and the output terminal, and the other end of the capacitor as the ground terminal.

In an embodiment, the transceiver-microwave probe chip further includes an intermediate frequency signal amplifier disposed between the doppler intermediate frequency signal output terminal and the output port, and the doppler intermediate frequency signal output terminal is electrically connected to the output port through the intermediate frequency signal amplifier, so as to output an amplified doppler intermediate frequency signal at the output port based on the amplification processing of the doppler intermediate frequency signal output from the doppler intermediate frequency signal output terminal by the intermediate frequency signal amplifier.

In an embodiment, the transceiver-microwave probe chip further includes a processor disposed between the if amplifier and the output port, so as to output a control signal formed based on the doppler if signal at the output port based on the analysis processing of the doppler if signal by the processor according to the corresponding logic.

According to the utility model discloses a further aspect, the utility model discloses still provide a microwave detection module, wherein the microwave detection module includes an antenna and aforementioned arbitrary receiving and dispatching microwave detection chip of unification, wherein receiving and dispatching microwave detection chip of unification in its radio frequency port with the antenna feed links to each other to in microwave detection based on the Doppler effect principle is used, through the radio frequency port with feed connection between the antenna realizes simultaneously with receiving and dispatching unification mode right the transmission feed and the receipt feed of antenna.

In one embodiment, the antenna is a planar patch antenna configured in a single-layer double-sided circuit board form and includes a reference ground and a radiation source carried on two opposite sides of the single-layer double-sided circuit board, wherein the receiving and transmitting integrated microwave detection chip and the radiation source are connected to each other by feeding on the same side of the single-layer double-sided circuit board.

In an embodiment, the receiving and transmitting integrated microwave detection chip and the radiation source are on the same side of the single-layer double-sided circuit board and are connected to a high-frequency microstrip feed line between the radio frequency port and the radiation source through direct feed connection.

In one embodiment, the radiation source is provided with an edge feeder line, wherein the transmitting-receiving integrated microwave detection chip and the radiation source are on the same side of the single-layer double-sided circuit board and connected with a high-frequency microstrip feeder line between the radio frequency port and the edge feeder line.

In an embodiment, said radiation originates from a physical central point thereof and is grounded in electrical connection with said reference ground.

Drawings

Fig. 1A is a schematic structural diagram of a conventional microwave detector that uses a microwave detection chip to implement a transmit-receive separation mode with dual antennas.

Fig. 1B is another schematic structural diagram of a conventional microwave detector that uses a microwave detection chip and dual antennas to implement a transmit-receive separation mode.

Fig. 2 is a schematic structural diagram of a conventional microwave detector that uses a microwave detection chip and a single antenna to implement a transmit-receive separation mode.

Fig. 3 is a schematic structural diagram of a conventional microwave detector that uses a microwave detection chip to implement a transmit-receive integrated mode with a single antenna.

Fig. 4A is a schematic diagram of a structure block diagram of a transmitting-receiving integrated microwave detection chip according to an embodiment of the present invention.

Fig. 4B is a schematic diagram of a structure of a transmitting-receiving integrated microwave detection chip according to another embodiment of the present invention.

Fig. 4C is a schematic diagram of a structure of a transmitting-receiving integrated microwave detection chip according to another embodiment of the present invention.

Fig. 4D is a schematic block diagram of a transmitting-receiving integrated microwave detection chip according to another embodiment of the present invention.

Fig. 5A is a schematic diagram of a structure of a transmitting-receiving integrated microwave detection chip according to another embodiment of the present invention.

Fig. 5B is a schematic structural diagram of the phase shifter of the microwave detection chip for receiving and transmitting signals according to the above embodiment of the present invention.

Fig. 5C is another schematic structural diagram of the phase shifter of the integrated transceiver chip according to the above embodiment of the present invention.

Fig. 5D is another schematic structural diagram of the phase shifter of the transceiver-microwave probe chip according to the above embodiment of the invention.

Fig. 6 is a block diagram of a transmitting-receiving integrated microwave detection chip according to another embodiment of the present invention.

Fig. 7 is a block diagram of a transmitting-receiving integrated microwave detection chip according to another embodiment of the present invention.

Fig. 8 is a block diagram of a transmitting/receiving integrated microwave detection chip according to another embodiment of the present invention.

Fig. 9 is a block diagram illustrating a transmitting-receiving integrated microwave detection chip according to another embodiment of the present invention.

Fig. 10 is a schematic structural block diagram of the microwave detection module according to the present invention, in which the receiving and transmitting integrated microwave detection chip uses a single antenna to implement a receiving and transmitting integrated mode.

Fig. 11A is a schematic structural diagram of a microwave detection module according to the present invention, which employs the above-mentioned receiving and transmitting integrated microwave detection chip to implement a receiving and transmitting integrated mode with a single antenna.

Fig. 11B is another schematic structural diagram of the microwave detection module according to the present invention, which employs the transceiving-integrated microwave detection chip of any of the above embodiments to implement a transceiving-integrated mode with a single antenna.

Fig. 11C is another schematic structural diagram of the microwave detection module according to the present invention, which employs the receiving-transmitting integrated microwave detection chip to implement the receiving-transmitting integrated mode with a single antenna.

Fig. 12 is an application schematic diagram of the microwave detection module according to the present invention, which uses the integrated transceiving microwave detection chip of any of the above embodiments to implement the transceiving integration mode by using a single antenna.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The underlying principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships that are based on those shown in the drawings, which are merely for convenience in describing the present disclosure and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus the terms are not to be construed as limiting the invention.

It is understood that the terms "a" and "an" should be interpreted as meaning "at least one" or "one or more," i.e., that a quantity of one element may be one in one embodiment, while a quantity of another element may be plural in other embodiments, and the terms "a" and "an" should not be interpreted as limiting the quantity.

The utility model provides a microwave of receiving and dispatching unification surveys chip and microwave and surveys module, wherein the microwave of receiving and dispatching unification surveys the chip and has a power port, an output port and is used for providing excitation signal and receiving echo signal's a radio frequency port to in the microwave based on the Doppler effect principle surveys and uses, lie in the state that power port is supplied power, through feed connection between radio frequency port and the corresponding antenna realizes simultaneously right the transmission feed and the receipt feed of antenna, and in output port output corresponding Doppler intermediate frequency signal or based on the control signal that Doppler intermediate frequency signal formed and form the antenna system of receiving and dispatching unification, wherein the microwave of receiving and dispatching unification surveys the chip with one the radio frequency port provides excitation signal and receiving echo signal simultaneously, therefore is favorable to reducing the port pin number of the microwave of receiving and dispatching unification surveys the chip, is simplifying can improve in the structural design of the microwave of receiving and dispatching unification surveys the integrated level of chip.

Specifically, referring to fig. 4A to 4D of the drawings of the present application, a block diagram of a receiving-transmitting integrated microwave probe chip according to various embodiments of the present invention is illustrated, wherein in the embodiments of the present invention, the receiving-transmitting integrated microwave probe chip has the power port (VCC) 10, the radio frequency port (RX/TX) 20 and the output port 30, and includes an oscillator 40, a Mixer (Mixer) 50 and at least one phase shifter 60, wherein the oscillator 40 has an excitation signal output 41, a local oscillator signal output 42 and a power supply terminal 43 electrically connected to the power port 10, and is configured to output excitation signals and local oscillator signals of the same frequency respectively at the excitation signal output 41 and the local oscillator signal output 42 in a state where the power supply terminal 43 is powered through the power port 10, wherein the Mixer 50 has an echo signal input 51, a local oscillator signal input 52 and an intermediate frequency signal output 53 electrically connected to the output port 30, and is configured to be connected to the local oscillator signal output terminal 52 and the local oscillator signal output terminal 42, and is configured to be connected to the intermediate frequency signal input 51 and the local oscillator signal output terminal 52 and to the local oscillator signal output terminal 42, wherein the doppler signal output terminal 52 is configured to form an intermediate frequency difference between the doppler signal output 52 and the local oscillator signal output terminal 40, and the doppler signal output terminal 52, and the doppler signal output terminal is configured to control the doppler signal output terminal 52, and the doppler signal output terminal 40, so as to form a transmission channel capable of transmitting electrical signals between the local oscillator signal output terminal 42 and the local oscillator signal input terminal 52 and to access the local oscillator signal output from the local oscillator signal output terminal 42 of the oscillator 40 at the local oscillator signal input terminal 52, wherein the rf port 20 of the transceiver-in-one microwave probing chip is electrically connected to the excitation signal output terminal 41 of the oscillator 40 and the echo signal input terminal 51 of the mixer 50, respectively, so as to form a transmission channel capable of transmitting electrical signals between the rf port 20 and the excitation signal output terminal 41 and the echo signal input terminal 51, respectively, and the electrical connection relationship between the rf port 20 and the excitation signal output terminal 41 and the echo signal input terminal 51 includes but is not limited to forming the transmission channel in a physically connected electrical connection form, and forming the transmission channels in a physically disconnected electrical connection form based on electromagnetic coupling characteristics of components such as capacitors, transformers, and coupling lines, wherein the phase shifter 60 is disposed in at least one of the two transmission channels between the rf port 20 and the excitation signal output terminal 41 and the echo signal input terminal 51, and the transmission channel between the local oscillation signal output terminal 42 and the local oscillation signal input terminal 52, so that in a state where the rf port 20 of the transceiver-in-one microwave detection chip is fed and connected to the antenna to access the echo signal, an intrinsic phase difference between the echo signal accessed by the echo signal input terminal 51 and the local oscillation signal accessed by the local oscillation signal input terminal 52 is formed, corresponding to a state where there is no moving object in a corresponding detection area, outputting the doppler intermediate frequency signal having a natural strength and being in a form of a direct current signal at the doppler intermediate frequency signal output end 53 based on a natural phase difference between the echo signal input by the echo signal input end 51 and the local oscillation signal input by the local oscillation signal input end 52; and in the state that there is the activity object in the detection area, on the basis of the inherent intensity of the Doppler intermediate frequency signal, ensure the intensity change of the Doppler intermediate frequency signal to the echo signal based on the accuracy of the feedback of the frequency/phase change formed by the Doppler effect principle, so as to ensure the accuracy of the feedback of the Doppler intermediate frequency signal to the object activity.

In particular, in the embodiments of the present invention, a separate Voltage Controlled Oscillator (VCO) is taken as the oscillator 40 only as an example and does not constitute a limitation to the present invention. That is, the type of the oscillator 40 does not constitute a limitation of the present invention, in some embodiments of the present invention, the oscillator 40 may be implemented as a frequency divider, a self-oscillation circuit, a function generator, a phase-locked loop (PLL), a frequency synthesizer, a clock generator, and the like for providing an output signal whose frequency may vary with a voltage amplitude of an input signal within a reasonable range.

In addition, in the embodiments of the present invention, the type of the mixer 50 is not limited, for example, the mixer 50 may adopt an active mixer or a passive mixer; the circuit form of the phase shifter 60 is not limited, and the phase shifter 60 may be any one of an integrating circuit, a differentiating circuit, and a logic gate circuit formed by transistors.

It should be noted that the phase shifter 60 is preferably arranged in the corresponding transmission channel such that the inherent phase difference between the echo signal accessed by the echo signal input terminal 51 and the local oscillator signal accessed by the local oscillator signal input terminal 52 is in a phase difference range of greater than or equal to 45 ° and less than or equal to 135 ° to ensure the inherent strength of the doppler intermediate frequency signal, and such that the inherent phase difference between the echo signal accessed by the echo signal input terminal 51 and the excitation signal output by the excitation signal output terminal 41 is greater than or equal to 45 ° and less than or equal to 135 °, so as to ensure the isolation between the excitation signal output terminal 41 of the oscillator 40 and the echo signal input terminal 51 of the mixer 50 to further ensure the accuracy of the feedback of the strength variation of the doppler intermediate frequency signal to the frequency/phase variation of the echo signal formed based on the doppler effect principle.

It should be understood that, corresponding to the definition of the electrical connection relationship between the rf port 20 and the excitation signal output terminal 41 and the echo signal input terminal 51 in the above description, the connection relationship defined by the description of electrical connection/electrical connection means that a transmission channel capable of transmitting electrical signals is formed, for example, the transmission channel is formed in the electrically connected form of physical connection, or the transmission channel is formed in the electrically connected form of physical disconnection based on the electromagnetic coupling characteristics of components such as capacitors, transformers, and coupling lines, and the present invention is not limited thereto.

Correspondingly, in the embodiments of the present invention, the transmission channel between the rf port 20 and the excitation signal output terminal 41 is optionally provided with at least one blocking capacitor 70 corresponding to fig. 4A to 4C, that is, the rf port 20 is optionally electrically connected to the excitation signal output terminal 41 through the blocking capacitor 70 based on the electromagnetic coupling characteristic of the blocking capacitor 70, so as to isolate the output of the dc component in the excitation signal output from the excitation signal output terminal 41 of the oscillator 40 to the rf port 20 based on the arrangement of the transmission channel between the rf port 20 and the excitation signal output terminal 41 of the blocking capacitor 70, thereby ensuring the operation stability of the antenna connected to the rf port 20.

It should be noted that, in any embodiment corresponding to fig. 4A to 4C, the dc blocking capacitor 70 is optionally replaced by a microstrip transformer 70' corresponding to fig. 4D, and the rf port 20 is electrically connected to the excitation signal output terminal 41 through the microstrip transformer 70', so as to isolate the output of the dc component in the excitation signal output from the excitation signal output terminal 41 of the oscillator 40 from the rf port 20 based on the isolation coupling characteristic of the microstrip transformer 70', thereby ensuring the operation stability of the antenna fed to the rf port 20.

Further, in the embodiments of the present invention, the rf port 20 and the two transmission channels between the excitation signal output terminal 41 and the echo signal input terminal 51 have a common channel. That is, the rf port 20 is electrically connected to the excitation signal output terminal 41 and the echo signal input terminal 51 through the same path point/segment, so as to form the common channel between the rf port 20 and the path point/segment. At least one of the phase shifters 60 is disposed on the common channel of both transmission channels corresponding to the state where the phase shifter 60 is disposed on at least one of the transmission channels between the rf port 20 and the excitation signal output terminal 41 and the echo signal input terminal 51, or at least one of the phase shifters 60 is disposed on the non-common channel portion of one of the transmission channels corresponding to fig. 4A or fig. 4B to 4D.

Specifically, corresponding to fig. 4A, when the phase shifter 60 is disposed in the common channel, when the rf port 20 of the transceiver-integrated microwave probe chip is connected to the antenna by feeding, the excitation signal output from the excitation signal output terminal 41 of the oscillator 40 is phase-shifted by the phase shifter 60 and then feeds to the antenna, and the echo signal, which is received from the rf port 20 and corresponds to the phase of the phase-shifted excitation signal, is phase-shifted by the phase shifter 60 and transmitted to the echo signal input terminal 51 of the mixer 50, so as to form an intrinsic phase difference between the echo signal received by the echo signal input terminal 51 and the excitation signal output by the excitation signal output terminal 41, thereby ensuring the isolation between the excitation signal output terminal 41 of the oscillator 40 and the echo signal input terminal 51 of the mixer 50, and further ensuring the accuracy of the feedback of the intensity variation of the echo signal on the frequency/phase variation formed by the doppler effect principle, and forming an intrinsic phase difference between the echo signal received by the echo signal input terminal 51 and the echo signal input terminal 52 of the doppler effect, thereby facilitating the formation of the doppler effect on the local oscillation frequency variation of the echo signal.

Corresponding to fig. 4B, in a state where the phase shifter 60 is disposed in the unshared channel portion of the transmission channel between the rf port 20 and the excitation signal output terminal 41, when the rf port 20 of the transceiver-integrated microwave probe chip is fed and connected to the antenna, the excitation signal output from the excitation signal output terminal 41 of the oscillator 40 is phase-shifted by the phase shifter 60 to feed the antenna, and the echo signal, which is received from the rf port 20 and corresponds to the phase of the phase-shifted excitation signal, is transmitted to the echo signal input terminal 51 through the transmission channel between the rf port 20 and the echo signal input terminal 51, so as to form an intrinsic phase difference between the echo signal received at the echo signal input terminal 51 and the excitation signal output at the excitation signal output terminal 41, thereby ensuring an isolation between the excitation signal output terminal 41 of the oscillator 40 and the echo signal input terminal 51 of the mixer 50, and further ensuring an accuracy of a feedback of a frequency/phase change of the echo signal formed by a change of the intensity change of the doppler signal on the basis of the echo signal, and further ensuring an accuracy of an intensity change of the echo signal received at the echo input terminal 51 and local oscillation input of the echo signal input terminal 52 on the basis of the doppler effect.

Corresponding to fig. 4C and 4D, in a state where the phase shifter 60 is disposed in the unshared channel portion of the transmission channel between the rf port 20 and the echo signal input terminal 51, when the rf port 20 of the transceiver-in-one microwave detection chip is fed and connected to the antenna, the excitation signal output from the excitation signal output terminal 41 of the oscillator 40 is fed to the antenna through the transmission channel between the rf port 20 and the excitation signal output terminal 41, and the echo signal, which is received from the rf port 20 and corresponds to the phase of the excitation signal, is phase-shifted and transmitted to the echo signal input terminal 51 through the phase shifter 60, so as to form an intrinsic phase difference between the echo signal received at the echo signal input terminal 51 and the excitation signal output at the excitation signal output terminal 41, thereby ensuring the isolation between the excitation signal output terminal 41 of the oscillator 40 and the echo signal input terminal 51 of the mixer 50, and further ensuring the accuracy of the feedback of the intensity change of the echo signal to the echo signal based on the doppler effect, and further ensuring the intrinsic phase change of the echo signal received at the echo signal input terminal 52 based on the doppler effect principle of the doppler effect.

In particular, in the embodiments of the present invention, the non-shared channel portion of the transmission channel between the rf port 20 and the excitation signal output terminal 41 is further provided with an amplifier 80 to buffer/isolate interference signals from entering the oscillator 40, and the strength of the excitation signal output from the rf port 20 of the transceiver-in-one microwave detection chip can be ensured based on the amplification processing of the excitation signal output from the excitation signal output terminal 41 of the oscillator 40 by the amplifier 80, so as to ensure the feeding stability of the rf port 20 to the antenna connected to the antenna.

It is understood that in these embodiments of the present invention, the phase shifter 60 is illustrated as one of the two transmission channels disposed between the rf port 20 and the excitation signal output terminal 41 and the echo signal input terminal 51, and in other embodiments of the present invention, the phase shifter 60 is disposed in the transmission channel between the local oscillator signal output terminal 42 and the local oscillator signal input terminal 52. That is to say, in the two transmission channels between the radio frequency port 20 and the excitation signal output end 41 and the echo signal input end 51, and in the transmission channel between the local oscillation signal output end 42 and the local oscillation signal input end 52, at least one of the transmission channels is provided with at least one of the phase shifters 60, which is not limited by the present invention. For example, both of the transmission channels between the radio frequency port 20 and the excitation signal output 41 and the echo signal input 51 may be provided with the phase shifter 60, or both of the common channel and the unshared channel portions of one of the transmission channels may be provided with the phase shifter 60.

Further, in the embodiments of the present invention, the phase shifter 60 can be implemented as an integrated in the microstrip line structure on the chip of the microwave detection chip integrated with transceiver, such as microstrip resistance, microstrip inductance, etc. having phase shift function, such as microstrip transformer, microstrip coupling line, etc. having phase shift function based on electromagnetic coupling characteristic, and can be implemented based on the electromagnetic coupling characteristic of this kind of microstrip line structure on the chip the oscillator 40 the excitation signal output 41 with the mixer 50 the electric isolation between the echo signal input 51 and further ensure the excitation signal output 41 with the isolation between the echo signal input 51, the present invention is not limited thereto.

For example, referring to fig. 5A to 5D of the drawings attached to the present disclosure, based on the structure of the transmitting and receiving integrated microwave detecting chip illustrated in fig. 4B, the structure in which the phase shifter 60 is implemented as an on-chip microstrip line is illustrated. Specifically, in this embodiment of the present invention, the phase shifter 60 is configured in an on-chip microstrip inductance form and may be implemented as a microstrip coil corresponding to any one of the staggered surrounding shown in fig. 5B and 5D, or as a microstrip coil spirally surrounding shown in fig. 5C, so as to reduce the volume of the phase shifter 60 configured in an on-chip microstrip inductance form under the requirement of the length of the on-chip microstrip line of the on-chip microstrip inductance form by the parameter limitation of the phase shifter 60.

It is understood that, in the case where the phase shifter 60 is implemented as an on-chip microstrip inductor and presents a state of a microstrip coil in a staggered surrounding manner corresponding to fig. 5B, the phase shifter 60 may be disposed in a non-common channel portion of one of the transmission channels corresponding to fig. 4B to 4D, or may be disposed in the common channel of two transmission channels corresponding to fig. 4A, which is not limited by the present invention.

For example, referring to fig. 6 of the drawings attached to the present disclosure, a structure in which the phase shifter 60 is implemented as an on-chip microstrip line is illustrated based on the structure of the transmitting/receiving integrated microwave detecting chip illustrated in fig. 4C. Specifically, in this embodiment of the present invention, the phase shifter 60 is implemented as a microstrip coupling line and has a first microstrip coil 61, a second microstrip coil 62 and a three-port impedance matching circuit 63 corresponding to fig. 6, wherein the first microstrip coil 61 is disposed in the transmission channel between the rf port 20 and the excitation signal output terminal 41, the second microstrip coil 62 is disposed between the input terminal and the ground terminal of the three-port impedance matching circuit 63 in a state of being electrically coupled with the first microstrip coil 61, the output terminal of the three-port impedance matching circuit 63 is electrically connected to the echo signal input terminal 51 of the mixer 50, wherein the three-port impedance matching circuit 63 includes a resistor 631 and a capacitor 632 having one end electrically connected to the resistor 631, wherein the three-port impedance matching circuit 63 has the two ends of the resistor 631 as the input terminal and the output terminal and the other end of the capacitor 632 as the ground terminal to match the two ends of the second microstrip coil 62 and the capacitor 632 based on the respective parameter settings of the resistor 631 and the capacitor 632, thereby matching the impedance characteristics of the second microstrip coupling coil 62 and the impedance matching circuit 50 to transmit the echo signal between the echo signal input terminal 51 and the echo signal input terminal 51.

It is also understood that, in a state where the phase shifter 60 is implemented as a microstrip coupled line, the phase shifter 60 may correspond to the transmission channel disposed between the radio frequency port 20 and the echo signal input terminal 51 in fig. 6, the transmission channel disposed between the local oscillator signal output terminal 42 and the local oscillator signal input terminal 52, or the transmission channel disposed between the radio frequency port 20 and the excitation signal output terminal 41, the second microstrip coil 62 is disposed between the output terminal and the ground terminal of the three-port impedance matching circuit 63 in a state of being electrically coupled to the first microstrip coil 61, and the input terminal of the three-port impedance matching circuit 63 is electrically connected to the excitation signal output terminal 41 of the oscillator 40, which is not limited by the present invention.

It should be noted that, in the embodiments of the present invention, the receiving and transmitting integrated microwave detection chip further includes an intermediate frequency signal amplifier corresponding to fig. 4A to fig. 6 and arranged between the doppler intermediate frequency signal output end 53 and the output port 30, so as to output the amplified doppler intermediate frequency signal from the output port 30 based on the intermediate frequency signal amplifier amplifying the doppler intermediate frequency signal output from the doppler intermediate frequency signal output end 53.

Further, on the basis of any one of the structures of the integrated microwave probe chip illustrated in fig. 4A to 6, the integrated microwave probe chip optionally includes a processor (MCU) disposed between the intermediate frequency signal amplifier and the output port 30 corresponding to fig. 7, so as to analyze and process the doppler intermediate frequency signal according to corresponding logic based on the processor, and output a control signal formed based on the doppler intermediate frequency signal at the output port 30, so as to control corresponding electrical equipment based on the control signal, so as to implement intelligent response of the controlled electrical equipment to the doppler intermediate frequency signal and respond to human body activity in a corresponding probe area.

In particular, on the basis of any one of the structures of the transceiver-integrated microwave detection chip illustrated in fig. 4A to 7, the transceiver-integrated microwave detection chip optionally further includes an equivalent inductor disposed between the excitation signal output terminal 41 and the power supply terminal 43 of the oscillator 40, so as to reduce the attenuation of the echo signal in the transmission channel between the radio frequency port 20 and the echo signal input terminal 51 based on the equivalent inductor, and further improve the accuracy of the feedback of the intensity change of the doppler intermediate frequency signal to the frequency/phase change of the echo signal formed based on the doppler effect principle.

Further, on the basis of any one of the structures of the transceiver-in-one microwave detection chip illustrated in fig. 4A to 8, the transceiver-in-one microwave detection chip optionally further includes a pair of ground inductors electrically connected to the radio frequency port 20 corresponding to fig. 9, so as to form a corresponding filter network at the radio frequency port 20 based on the pair of ground inductors, so as to suppress interference signals from entering two transmission channels between the radio frequency port 20 and the excitation signal output terminal 41 and the echo signal input terminal 51, thereby improving the accuracy of the feedback of the intensity change of the doppler intermediate frequency signal to the frequency/phase change of the echo signal formed based on the doppler effect principle.

It is worth mentioning that in these embodiments of the utility model, the microwave detection chip of receiving and dispatching unification can be based on radio frequency port 20 with the feed connection of antenna realizes simultaneously right the transmission feed and the receipt feed of antenna and form the receiving and dispatching unification the microwave detection module has avoided external microstrip line bridge and schottky diode's use and can have simplified the line layout of microwave detection module with be adapted to miniaturized trend, be favorable to the guarantee simultaneously the interference killing feature of microwave detection module with reduce the cost of microwave detection module.

It should be further noted that, on the basis of any one of the structures of the transmit-receive integrated microwave detection chip illustrated in fig. 4A to 9, the microwave detection module formed by simultaneously implementing transmit feeding and receive feeding of the antenna based on the feed connection of the rf port 20 and the radiation source of the antenna optionally corresponds to fig. 10 and further includes an external ground inductor electrically connected to the rf port 20 outside the transmit-receive integrated microwave detection chip, so as to form a corresponding filter network based on the setting of the external ground inductor to suppress interference signals from entering the two transmission channels between the rf port 20 and the excitation signal output terminal 41 and the echo signal input terminal 51, and correspondingly improve the anti-interference capability of the microwave detection module to improve the accuracy of the feedback of the intensity change of the doppler intermediate frequency signals to the frequency/phase change of the echo signals formed based on the doppler effect principle.

Accordingly, the connection manner of the external ground-to-ground inductor in the actual circuit structure of the microwave detection module and the rf port 20 does not limit the present invention, for example, the external ground-to-ground inductor may be disposed outside the transceiver microwave detection chip and directly connected to the rf port 20, or may be disposed to be electrically connected to a high-frequency microstrip feeding line connected between the rf port 20 and the antenna and electrically connected to the rf port 20, or may be disposed to be electrically connected to the radiation source of the antenna and electrically connected to the rf port 20 based on the feeding connection relationship between the radiation source of the antenna and the rf port 20, which is not limited by the present invention.

It should be understood that the ground inductor and the external ground inductor are components having inductance characteristics in terms of electrical characteristics without limitation to the structural configuration thereof, and the present invention is not limited thereto, for example, the ground inductor and the external ground inductor may be implemented as an inductance element or a resistance element having inductance characteristics under the action of a high-frequency electrical signal.

Further exemplarily, referring to fig. 11A and 11B of the drawings of the present disclosure, a planar patch antenna 100 commonly used in the microwave detection field is taken as an example, wherein the planar patch antenna 100 includes a reference ground 101 and a radiation source 102 spaced from the reference ground 101, and the transmitting-receiving integrated microwave detection chip and the radiation source 102 can share the form feed connection of the reference ground 101 at the same side of the reference ground 101 to simultaneously implement the transmitting feed and the receiving feed of the planar patch antenna 100, thereby simplifying the circuit layout of the microwave detection module and shortening the high-frequency microstrip feed line between the transmitting-receiving integrated microwave detection chip and the radiation source 102 to ensure the capability of the microwave detection module.

That is to say, in a state where the rf port 20 of the integrated microwave detection chip can provide an excitation signal and receive an echo signal at the same time, the integrated microwave detection chip can be directly connected to the high-frequency microstrip feeding line between the rf port 20 and the radiation source 102 by feeding with the radiation source 102 on the same side of the reference ground 101, corresponding to fig. 11A, or connected to the rf port 20 and the side feeding line by feeding with the high-frequency microstrip feeding line in a state where the radiation source 102 is provided with a side feeding line corresponding to fig. 11B, on one hand, the integrated microwave detection module can be made to carry the radiation source 102, the reference ground 101, the integrated microwave detection chip and the corresponding circuits with the single-layer double-sided circuit board 103 corresponding to fig. 11A and 11B, which is beneficial to reducing the cost of the microwave detection module; on the other hand, since the feed connection between the rf port 20 and the radiation source 102 can avoid the use of a metalized via, the integrity of the region of the reference ground 101 corresponding to the projection of the radiation source 102 of the planar patch antenna 100 in the direction perpendicular to the reference ground direction 101 can be guaranteed, which is beneficial to guaranteeing the anti-interference capability and stability of the microwave detection module.

In addition, in a state that the integrated transceiver microwave detection chip and the radiation source 102 of the planar patch antenna 100 are in feed connection in a manner of sharing the reference ground 101 on the same side of the reference ground 101, the high-frequency microstrip feed line between the integrated transceiver microwave detection chip and the radiation source 102 can be shortened to reduce interference between the high-frequency microstrip feed line and other circuits, so that other circuits of the microwave detection module can be disposed on the same side of the reference ground 101 as the radiation source 102 and the integrated transceiver microwave detection chip, thereby simplifying the circuit layout of the microwave detection module, and ensuring the overall integrity of the reference ground and the anti-interference capability and stability of the microwave detection module.

It should be noted that, when the other circuits of the microwave detection module, the radiation source 102 and the transceiver microwave detection chip are disposed on the same side of the reference ground 101, the microwave detection module is suitable for being mounted in a mounting manner to reduce the mounting height of the microwave detection module and further adapt to the miniaturization trend.

In particular, corresponding to fig. 11A and 11B, in a state where the antenna is set as the planar patch antenna 100, the radiation source 102 of the planar patch antenna 100 is optionally grounded to equivalently form the external ground-to-ground inductance in the radiation source 102 under the action of a high-frequency excitation signal based on the feeding connection relationship between the radiation source 102 and the rf port 20, so as to improve the interference immunity of the microwave detection module, wherein the radiation source 102 is further optionally electrically connected to the ground reference 101 to be grounded, so as to simplify the grounding structure of the radiation source 102, and preferably, the physical central point of the radiation source 102 is grounded in an electrically connected state to the ground reference 101, so as to reduce the ground impedance of the planar patch antenna 100 at an off-resonant frequency and narrow the frequency bandwidth of the planar patch antenna 100 based on the zero-potential characteristic of the physical central point of the radiation source 102 at a normal resonant state while the radiation source 102 equivalently forms the external ground-to-ground inductance, so as to improve the interference immunity of the planar patch antenna 100 to electromagnetic crosstalk and interference of the planar patch antenna 100.

It should be noted that, corresponding to fig. 11C, the high-frequency microstrip feed line, in which the radiation source 102 is connected between the radio frequency port 20 and the radiation source 102, is grounded in a state of being electrically connected to the reference ground 101 through a pair of ground microstrip lines, where the pair of ground microstrip lines are bent lines with a certain width, so as to correspondingly improve the interference rejection capability of the planar patch antenna 100.

Exemplarily, referring to fig. 12, the microwave detection module is applied to a lamp 200, where the lamp 200 includes a lamp panel 210, and the lamp bead 211 is supported on the front surface of the lamp panel 210, where the microwave detection module is mounted on the front surface of the lamp panel 210 in a mounting manner, so as to reduce the height of the microwave detection module on the front surface of the lamp panel 210, thereby avoiding the microwave detection module from being mounted in an erection manner or in a manner of forming a through hole in the lamp panel 210, so as to avoid shielding the lamp bead 211, and avoiding the microwave detection module from forming a through hole in the lamp panel 210 to avoid damaging the integrity of the lamp panel 210, thereby ensuring the lighting effect of the lamp 200.

It can be understood that in this embodiment of the present invention, the microwave detection module is only used as an example and does not form a limitation to the present invention, in some embodiments of the present invention, as long as the antenna is set up with the form of receiving and sending unification and has a single feeding end, the receiving and sending unified microwave detection chip can be based on the radio frequency port 20 and the feeding connection of the feeding end of the antenna realize simultaneously that the transmission feeding and the reception feeding of the antenna form the receiving and sending unification the microwave detection module, correspondingly the microwave detection module also has the above advantages when the antenna is set as the planar patch antenna 100.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the terminology used in the description above is not necessarily meant to be the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.

Claims

1. A receiving-transmitting integrated microwave detection chip, wherein the receiving-transmitting integrated microwave detection chip has a power port, an output port and a radio frequency port for providing an excitation signal and receiving an echo signal, so that in a microwave detection application based on the doppler effect principle, in a state where the power port is powered, a transmitting feed and a receiving feed to the antenna are simultaneously realized in a receiving-transmitting integrated manner through a feed connection between the radio frequency port and a corresponding antenna, and a corresponding doppler intermediate frequency signal or a control signal formed based on the doppler intermediate frequency signal is output at the output port, wherein the receiving-transmitting integrated microwave detection chip includes:

an amplifier, wherein the amplifier is disposed in the transmission channel between the RF port and the excitation signal output.

2. The transceiver-in-one microwave probe chip as claimed in claim 1, wherein the phase shifter is an on-chip microstrip inductor configured in a staggered/spiral-wound microstrip coil configuration.

3. The transceiver-in-one microwave probe chip as claimed in claim 1, wherein the phase shifter is implemented as a microstrip coupled line having a first microstrip coil disposed in the transmission channel between the rf port and the excitation signal output terminal, a second microstrip coil disposed between an input terminal and a ground terminal of the three-port impedance matching circuit in a state of being electrically coupled to the first microstrip coil, an output terminal of the three-port impedance matching circuit being electrically connected to the echo signal input terminal of the mixer, wherein the three-port impedance matching circuit includes a resistor and a capacitor having one terminal electrically connected to the resistor, wherein the three-port impedance matching circuit has two terminals of the resistor as the input terminal and the output terminal, and the other terminal of the capacitor as the ground terminal.

4. The transceiver-in-one microwave probe chip as claimed in claim 1, wherein the phase shifter is implemented as a microstrip coupled line having a first microstrip coil disposed in the transmission channel between the rf port and the echo signal input terminal, a second microstrip coil disposed between an output terminal and a ground terminal of the three-port impedance matching circuit in a state electrically coupled to the first microstrip coil, the input terminal of the three-port impedance matching circuit being electrically connected to the excitation signal output terminal of the oscillator, wherein the three-port impedance matching circuit includes a resistor and a capacitor having one terminal electrically connected to the resistor, wherein the three-port impedance matching circuit has two terminals of the resistor as the input terminal and the output terminal, and the other terminal of the capacitor as the ground terminal.

5. The transceiver-in-one microwave probe chip according to any one of claims 1 to 4, wherein the transceiver-in-one microwave probe chip further comprises an intermediate frequency signal amplifier disposed between the Doppler intermediate frequency signal output terminal and the output port, and the Doppler intermediate frequency signal output terminal is electrically connected to the output port through the intermediate frequency signal amplifier, so as to output an amplified Doppler intermediate frequency signal at the output port based on the amplification processing of the Doppler intermediate frequency signal output from the Doppler intermediate frequency signal output terminal by the intermediate frequency signal amplifier.

6. The transceiver-in-one microwave probe chip as claimed in claim 5, wherein the transceiver-in-one microwave probe chip further comprises a processor disposed between the intermediate frequency signal amplifier and the output port, so as to output a control signal formed based on the doppler intermediate frequency signal at the output port based on the analysis processing of the doppler intermediate frequency signal by the processor according to the corresponding logic.

7. The microwave detection module, characterized in that, the microwave detection module includes an antenna and the integrated transceiver microwave detection chip of any one of claims 1 to 6, wherein the integrated transceiver microwave detection chip is connected to the antenna feed at its rf port, so that in the doppler-effect-based microwave detection application, the transmit feed and the receive feed of the antenna are simultaneously realized in an integrated transceiver mode through the feed connection between the rf port and the antenna.

8. The microwave detection module of claim 7, wherein the antenna is a planar patch antenna configured as a single-layer double-sided circuit board and includes a ground reference and a radiation source carried on two opposite sides of the single-layer double-sided circuit board, and wherein the transceiver-receiver microwave detection chip and the radiation source are connected to a same side of the single-layer double-sided circuit board for feeding.

9. The microwave detection module of claim 8, wherein the transceiver-and-transceiver microwave detection chip and the radiation source are directly feed-connected on the same side of the single-layer double-sided circuit board by a high-frequency microstrip feed line connected between the radio frequency port and the radiation source.

10. The microwave detection module of claim 8, wherein the radiation source is configured with an edge feed line, and wherein the transceiver-integrated microwave detection chip and the radiation source are on the same side of the single-layer double-sided circuit board to be connected to a high-frequency microstrip feed line feed connection between the rf port and the edge feed line.

11. A microwave detection module according to claim 8, wherein the radiation originates from a physically central point thereof and is grounded in electrical connection with the reference ground.