CN212848797U

CN212848797U - Anti-interference microwave detection module

Info

Publication number: CN212848797U
Application number: CN202021708852.3U
Authority: CN
Inventors: 邹高迪; 邹新; 邹明志
Original assignee: Shenzhen Merrytek Technology Co Ltd
Current assignee: Shenzhen Merrytek Technology Co Ltd
Priority date: 2020-08-14
Filing date: 2020-08-14
Publication date: 2021-03-30
Anticipated expiration: 2030-08-14

Abstract

The utility model discloses an anti-interference microwave detection module, wherein the anti-interference microwave detection module comprises a feed source and an antenna body, wherein the feed source is arranged to be powered by a power supply source to generate a feed signal between the positive pole and the ground of the feed source, wherein the antenna body comprises a radiation source, a reference ground and an equivalent inductance, wherein the radiation source is spaced apart from the reference ground, wherein the radiation source is provided with a radiation source main body, two side feeder lines respectively close to two adjacent sides of the radiation source main body, and two feeding points arranged on the two side feeder lines, wherein the radiation source is one of the feeding points electrically connected to one of the positive pole and the ground pole of the feed source, and the other pole of the feed source is electrically connected with the feed point through the equivalent inductor, the equivalent inductance is a component or a circuit with inductance characteristic under the action of the feed signal.

Description

Anti-interference microwave detection module

Technical Field

The utility model relates to a microwave detection field, in particular to anti-interference microwave detection module.

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. Among them, the radio technology, including the microwave detection technology based on the doppler effect principle, is used as a person and an object, and the important junction between the objects has unique advantages in the behavior detection and the existence detection technology, and can detect the action characteristics, the movement characteristics and the micromotion characteristics of a moving object, such as a person, even the heartbeat and the respiration characteristic information of the person without invading the privacy of the person, thereby having wide application prospect.

In particular, in an unlicensed ISM band defined by ITU-R (ITU radio communication Sector) for use by organizations such as industry, science and medicine, frequency bands applied to microwave detection mainly include limited frequency band resources such as 2.4Ghz, 5.8Ghz, 10.525Ghz, 24.125Gh, etc., and a corresponding microwave detector needs to observe a certain transmission power (generally, the transmission power is lower than 1W) to reduce interference to other radio devices when using the frequency bands, although the definition and licensing of different frequency bands can specify the used frequency bands of radios to reduce the probability of mutual interference between radio devices of different frequency bands, under the limited frequency band resource licensing, as the radio use coverage rate of adjacent frequency bands or the same frequency band increases, the problem of mutual interference between radios of adjacent or the same frequency band becomes serious, particularly, with the development of 5G high-speed communication, the coverage of a high-frequency communication network and the popularity of corresponding communication devices are higher and higher, which inevitably leads to congestion of adjacent frequency bands of a 5.8Ghz frequency band, i.e. the microwave detector using 5.8Ghz, which is more popular at present, faces an increasingly complex electromagnetic environment and faces more serious electromagnetic radiation interference. However, on one hand, the method is limited to the dependency and cognition on the classical circuit principle and the structural design of the microwave detector, and the existing technical means for improving the anti-interference performance of the microwave detector is limited to the inherent technical thinking of shielding interference signals and signal processing (for example, the inherent technical thinking of shielding foreign wireless signals, and the inherent technical thinking of signal processing such as filtering processing, software algorithm processing and the like on doppler intermediate frequency signals acquired according to the circuit principle and the structural design of the classical microwave detector) and has certain bottleneck limitation; on the other hand, the filtering process and the software algorithm process for the doppler intermediate frequency signal may simultaneously destroy the integrity of the feedback of the doppler intermediate frequency signal to the human body activity, that is, the existing technical means for improving the anti-interference performance of the microwave detector may destroy the integrity of the feedback of the doppler intermediate frequency signal to the human body activity, so that the feedback of the existing microwave detector to the human body activity is not complete and accurate, and the existing technical means for improving the anti-interference performance of the microwave detector is difficult to adapt to the increasingly complex electromagnetic environment as the electromagnetic environment becomes increasingly complex.

As shown in fig. 1A and fig. 1B, the equivalent circuit principle and structure of an antenna body 10P of a conventional microwave detector are respectively illustrated, wherein the antenna body 10P includes a radiation source 11P and a reference ground 12P, wherein the radiation source 11P and the reference ground 12P are disposed at intervals to form a radiation gap 110P between the radiation source 11P and the reference ground 12P, wherein the radiation source 11P has a feeding point 111P, wherein the antenna body 10P is adapted to be electrically coupled to the positive pole of a corresponding feed source at the feeding point 111P of the radiation source 11P for feeding, wherein the reference ground 12P is adapted to be electrically connected to the ground pole of the feed source, so that under the action of a high-frequency feeding signal of the feed source, the antenna body 10P is equivalent to the circuit structure illustrated in fig. 1A. As shown in fig. 1A, the antenna body 10P is equivalent to an LC series resonant circuit formed by an equivalent inductor L0 and an equivalent capacitor C0 connected in series with each other under the action of the high frequency feed signal of the feed source, specifically, the equivalent inductor L0 is electrically coupled to the positive pole of the feed source at one end thereof and is electrically connected to the ground pole of the feed source at the other end thereof through the equivalent capacitor C0 connected in series, so that the antenna body 10P can emit a probe beam in a probe space under the excitation of the feed point signal and receive a return wave formed by the probe beam reflected by at least one object in the probe space to generate an return wave signal, generate the doppler signal corresponding to the frequency difference between the excitation signal and the return wave signal by means of frequency mixing detection based on the doppler effect principle, on the one hand, limited to the dependency and cognition on the structural design and classical feed line of the antenna body 10P, on the other hand, although the improvement of the quality factor (i.e. Q value) of the antenna body 10P can narrow the frequency bandwidth of the antenna body 10P and improve the selectivity of the antenna body 10P to the resonant operating frequency, thereby improving the anti-interference performance of the microwave probe in a manner of reducing the interference of the electromagnetic environment to the echo signal, the improvement of the quality factor of the antenna body 10P is lack of theoretical guidance under the limitation of the impedance matching requirement of the antenna body 10P, and specifically depends on the empirical design of the dimensional relationship of the antenna body 10P, and the improvement of the quality factor of the antenna body 10P reduces the radiation power of the antenna body 10P based on the empirical design, so the optimization means of the anti-interference performance of the antenna body 10P is limited to the technical thinking of shielding the interference signal and processing the doppler intermediate frequency signal and has a certain inherent bottleneck limit, and are difficult to adapt to increasingly complex electromagnetic environments.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an anti-interference microwave detection module, wherein through reducing the mode of anti-interference microwave detection module at the impedance of resonance frequency point, anti-interference microwave detection module is narrowed at the frequency bandwidth of resonance frequency point, in order to improve anti-interference microwave detection module is to resonance frequency's selectivity and improve maintain in the interference immunity ability of anti-interference microwave detection module the radiation impedance of anti-interference microwave detection module corresponds the maintenance the radiation power of anti-interference microwave detection module.

Another object of the present invention is to provide an anti-interference microwave detection module, wherein the anti-interference microwave detection module is narrowed at the frequency bandwidth of the resonance frequency point, so that the anti-interference microwave detection module can effectively prevent the electromagnetic wave signal received or generated from being interfered by the electromagnetic radiation of the adjacent frequency band, thereby improving the anti-interference performance and the applicability of the anti-interference microwave detection module.

Another object of the present invention is to provide an anti-interference microwave detection module, wherein the anti-interference microwave detection module includes an antenna body, wherein the antenna body includes an at least radiation source, wherein the radiation source has a feed point, wherein the radiation source is derived from feed point electric connection has an equivalent inductance, specifically, the radiation source is derived from the feed point by electric connection in a corresponding feed source one utmost point and in the feed point warp equivalent inductance is by electric connection in another utmost point of the feed source, so as the radiation source is derived from the feed point quilt during the feed source feed, by the equivalent inductance is right the closed loop connection of feed source, the impedance of anti-interference microwave detection module at its resonance frequency point can be reduced.

Another object of the present invention is to provide an anti-interference microwave detection module, wherein the feed source is connected to the feed point electrically connected to the equivalent inductance's circuit structure state, the equivalent inductance both ends are respectively electrically connected to the different poles of the feed source and not restricted by specific polarity, namely the equivalent inductance connect in the feed point one end by electrically connected in during the positive pole of the feed source, the equivalent inductance's the other end by electrically connected in the ground of the feed source, or the equivalent inductance connect in the feed point one end by electrically connected in during the ground of the feed source, the equivalent inductance's the other end by electrically connected in the positive pole of the feed source, so that it is right that the feed line design of the radiation source can break away from the classical circuit structure design and have diversified circuit structure and layout design, thereby it is favorable to improve the anti-interference microwave detection module is to different structural designs and circuit layout demands And (4) adaptability.

Another object of the present invention is to provide an anti-interference microwave detection module, wherein on the structure basis of the conventional microwave detector, through will the radiation comes from the feed point warp the further electric connection of equivalent inductance in the mode of the ground pole of the feed source, form the feed source in the feed point quilt the circuit structure state of equivalent inductance closed loop connection, therefore the anti-interference microwave detection module can be implemented easily, simply and easily based on the structure of the conventional microwave detector, and low cost.

Another object of the present invention is to provide an anti-interference microwave detection module, wherein the radiation source is derived from the feed point is coupled to the ground of the corresponding feed source and the feed point is passed through the equivalent inductance is electrically connected to the positive pole of the feed source, so as to make the feed source produce the exciting current of the feed signal can in the feed point collects and is favorable to improving the integrality of the feed signal, the correspondence is strengthened the feed signal is right the control of the radiation source is favorable to improving the stability of the anti-interference microwave detection module.

Another object of the present invention is to provide an anti-interference microwave detection module, wherein the radiation source is derived from the feed point is electrically coupled to the ground of the corresponding feed source and the feed point is passed through the equivalent inductance is electrically connected to the positive circuit structure state of the feed source, the feed source generates the exciting current of the feed signal can be collected by the feed point and improved under the limitation of the corresponding transmitting power the radiation power of the anti-interference microwave detection module.

Another object of the present invention is to provide an anti-jamming microwave detection module, wherein the radiation source is derived from the feed point is electrically coupled to the ground of the corresponding feed source and the feed point is passed through the equivalent inductance is electrically connected to the positive circuit structure state of the feed source, in the feed source the transmission path of the feed signal allows avoiding adopting the capacitive coupling and ensuring for the traditional feed path the integrity of the feed signal is reduced the component cost of the feed source can be improved the transmission efficiency of the anti-jamming microwave detection module.

Another object of the present invention is to provide an anti-interference microwave detection module, wherein the radiation is derived from the feed point is coupled to the ground of the corresponding feed source and in the feed point is passed through equivalent inductance is electrically connected to the positive circuit structure state of the feed source, when the feed source is designed with the integrated circuit form and includes a microwave chip, based on the equivalent inductance is right the closed loop connection of the feed source, the transmitting terminal of the microwave chip is passed through the equivalent inductance is electrically connected to the positive of the feed source, so as to allow to avoid for traditional microwave chip the transmitting terminal of the microwave chip sets up extra inductance and reduces the component cost of the feed source, and further improve the anti-interference performance of the anti-interference microwave detection module in the way of feed signal's frequency width with narrowing.

Another object of the present invention is to provide an anti-interference microwave detection module, wherein the antenna body further includes a reference ground, wherein the radiation source is derived from the feed point is by the circuit structure state that the equivalent inductance closed loop is connected, the reference ground is electrically connected in right one of them utmost point of the power supply of feed power supply and not restricted by specific polarity, so as to make the circuit design of the anti-interference microwave detection module can break away from classical circuit structure design and have diversified circuit structure and layout design, thereby being favorable to improving the adaptability of the anti-interference microwave detection module to different structure designs and circuit layout demands.

Another object of the present invention is to provide an anti-interference microwave detection module, wherein the radiation is derived from the feed point is coupled to the ground of the corresponding feed source and the feed point is passed through the equivalent inductance is electrically connected to the positive circuit structure state of the feed source, and the reference ground is connected to the ground of the feed source and electrically connected to the ground of the power supply source of the feed source, the positive of the feed source further forms corresponding distributed capacitance with the reference and has a decoupling effect on the power supply source of the feed source, thereby being favorable to improving the circuit stability of the feed source.

Another object of the present invention is to provide an anti-interference microwave detection module, wherein the equivalent inductance is in the feed signal effect of the feed source has the components and parts or the circuit of inductance characteristic, such as one or more combinations in inductance element, resistance element and microstrip circuit, so as to make the equivalent inductance has diversified structure and form design, thereby being favorable to improving the adaptability of the anti-interference microwave detection module to different structural design and circuit layout demand.

Another objective of the present invention is to provide an anti-interference microwave detecting module, wherein the antenna body is configured as a planar antenna and has a radiation source in a planar state, wherein the feeding point is located on the radiation source and deviates from the position of the physical central point of the radiation source, the direction of the connection line from the feeding point to the physical central point of the radiation source is the polarization direction of the radiation source, and the line passing through the physical central point of the radiation source and perpendicular to the polarization direction of the radiation source is the zero potential line of the radiation source, wherein any point on the radiation source located on the zero potential line is a reference level point, wherein the radiation source is electrically connected to the feeding point and at least one of the reference level point is electrically connected to the other pole of the feed source, therefore, the equivalent inductance is formed between the feeding point of the radiation source and the reference level point by virtue of the high-frequency characteristic of the feeding signal of the feed source, so that the circuit structure of the anti-interference microwave detection module is favorably simplified.

Another object of the utility model is to provide an anti-interference microwave detection module, wherein based on the radiation source is in the charge distribution form under the fed state, the reference level point does zero potential point on the radiation source, so with the feed in the feed point with the reference level point by electric connection in the not homopolar state of feed forms right in the time of the reduction effect of the loss impedance of the antenna body, the guarantee the radiation impedance of the antenna body is not reduced to at the constriction the antenna body improves in the frequency bandwidth of resonance frequency point the mode of the selectivity of the antenna body to resonance frequency improves in the anti-interference performance of anti-interference microwave detection module, maintains the radiation power of the antenna body.

According to an aspect of the utility model, the utility model provides an anti-interference microwave detection module, wherein anti-interference microwave detection module includes:

a feed source, wherein the feed source is arranged to allow power to be supplied by a power supply source to generate a feed signal between the positive pole and the ground pole of the feed source; and

an antenna body, wherein the antenna body comprises a radiation source, a ground reference and an equivalent inductance, wherein the antenna body is configured as a flat antenna and has the radiation source and the ground reference in a planar state, wherein the radiation source and the ground reference are spaced in a parallel state, wherein the radiation source has a radiation source main body and two side feeding lines respectively close to two adjacent sides of the radiation source main body, and two feeding points disposed on the two side feeding lines, wherein a connection line of one of the feeding points of the radiation source and a physical central point of the radiation source main body is perpendicular to a connection line of the other of the feeding points of the radiation source and the physical central point of the radiation source main body, wherein the radiation is originated from one of the feeding points which is electrically connected to one of a positive pole and a ground pole of the feed source, and is electrically connected to the other pole of the feed source through the equivalent inductance at the feeding point, so as to form a circuit connection relation that the equivalent inductance closed loop is connected between the anode and the ground of the feed source, wherein the equivalent inductance is a component or a circuit with inductance characteristic under the action of the feed signal.

In an embodiment, the radiation source is one of the feeding points electrically connected to the ground of the feed source and the feeding point electrically connected to the positive electrode of the feed source through the equivalent inductor, that is, one end of the equivalent inductor electrically connected to the feeding point is electrically connected to the ground of the feed source, and the other end of the equivalent inductor is electrically connected to the positive electrode of the feed source.

In an embodiment, one end of the equivalent inductor connected to the positive electrode of the feed source is further electrically connected to a physical center point of the radiation source body.

In an embodiment, the feed source is provided in the form of a discrete device and has a MOS transistor, wherein one end of the equivalent inductor electrically connected to the feed point is electrically connected to a drain of the MOS transistor and electrically connected to a ground of the feed source.

In an embodiment, the feed source is provided in the form of a discrete component and has a triode, wherein one end of the equivalent inductor electrically connected to the feed point is electrically connected to a collector of the triode and to a ground of the feed source.

In an embodiment, the feed source is designed in an integrated circuit form and includes a microwave chip, wherein the microwave chip includes a transmitting end and a receiving end, wherein one end of the equivalent inductor electrically connected to the feeding point is electrically connected to the ground of the feed source in a manner of being electrically connected to the transmitting end, that is, the radiation source is electrically connected to the ground of the feed source in a state of being electrically connected to the transmitting end of the microwave chip from one of the feeding points, and the radiation source is electrically connected to the receiving end through at least one inductor from the other feeding point.

In an embodiment, the antenna body further includes a radiation source substrate and a reference ground substrate, wherein the reference ground is fixed between the radiation source substrate and the reference ground substrate, wherein the radiation source and the reference ground are separated by the radiation source substrate and spaced apart in a parallel state, and a connection direction of one of the feeding points of the radiation source and a physical center point of the radiation source body and a connection direction of the other of the feeding points of the radiation source and the physical center point of the radiation source body have the same size.

In an embodiment, the reference ground is arranged at the positive pole of the power supply source which supplies power to the feed source when the feed source is supplied with power.

In one embodiment, the reference ground is electrically connected to the anode of the feed source and is electrically connected to the anode of the power supply source supplying power to the feed source when the feed source is powered.

In an embodiment, the radiation source is electrically connected to the positive electrode of the feed source in a state where the radiation source is connected to the reference ground through a metallized via structure, so as to correspond to a state where one end of the radiation source forming the equivalent inductance connected to the positive electrode of the feed source is further electrically connected to the physical central point of the radiation source body.

Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.

Drawings

Fig. 1A is a schematic diagram of an equivalent circuit of an antenna body of a conventional microwave detector under the action of a high-frequency feed signal.

Fig. 1B is a schematic structural diagram of the antenna body of the conventional microwave detector.

Fig. 2A is a schematic diagram of a block diagram of an anti-interference microwave detection module according to an embodiment of the present invention.

Fig. 2B is an equivalent circuit schematic diagram of the anti-interference microwave detection module according to the above embodiments of the present invention.

Fig. 3A is an equivalent circuit schematic diagram of the anti-interference microwave detection module according to an optimized embodiment of the present invention.

Fig. 3B is an implementation schematic diagram of the anti-interference microwave detection module according to the above-mentioned preferred embodiment of the present invention.

Fig. 4A is a schematic diagram of an equivalent circuit of the anti-interference microwave detection module according to another preferred embodiment of the above embodiments of the present invention.

Fig. 4B is an equivalent circuit schematic diagram of the anti-interference microwave detection module according to a variant of the above-described preferred embodiment of the present invention.

Fig. 5A and 5B are schematic diagrams of an implementation structure of the anti-interference microwave detection module according to the above-mentioned preferred embodiment and modified embodiment of the present invention.

Fig. 6A is an implementation structural diagram of the anti-interference microwave detection module according to the above modified embodiment of the present invention.

Fig. 6B is an implementation structural diagram of the anti-interference microwave detection module according to the above modified embodiment of the present invention.

Fig. 7A is an implementation structural diagram of the anti-interference microwave detection module according to the above modified embodiment of the present invention.

Fig. 7B is an implementation structural diagram of the anti-interference microwave detection module according to the above modified embodiment of the present invention.

Fig. 8A and 8B are schematic diagrams of an implementation structure of the anti-interference microwave detection module according to the above modified embodiment of the present invention.

Fig. 9A is a schematic diagram of an implementation structure of the anti-interference microwave detection module according to the above modified embodiment of the present invention.

Fig. 9B is an implementation structural diagram of the anti-interference microwave detection module according to the above modified embodiment of the present invention.

Fig. 10 is a schematic structural diagram of an implementation of the anti-interference microwave detection module according to the above modified embodiment of the present invention.

Fig. 11 is a schematic structural diagram of another implementation of the anti-interference microwave detection module according to the above-described preferred and modified embodiments of the present invention.

Fig. 12 is a schematic structural diagram of another implementation of the anti-interference microwave detection module according to the above-described preferred and modified embodiments of the present invention.

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 basic 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," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purposes of limitation.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

Referring to fig. 2A and 2B of the drawings of the specification of the present invention, a structural block diagram and an equivalent circuit principle of an anti-jamming microwave detecting module according to an embodiment of the present invention are respectively illustrated, wherein the anti-jamming microwave detecting module includes an antenna body 10 and a feed source 20, wherein the antenna body 10 includes a radiation source 11, a reference ground 12 and an equivalent inductor 13, wherein the radiation source 11 has a feeding point 111, wherein the equivalent inductor 13 is electrically connected to the radiation source 11 at the feeding point 111, wherein the radiation source 11 is electrically connected to one pole of the feed source 20 at the feeding point 111 and is electrically connected to the other pole of the feed source 20 at the feeding point 111 through the equivalent inductor 13, that is, one end of the equivalent inductor 13 is electrically connected to the feeding point 111 of the radiation source 11, and two ends of the equivalent inductor 13 are electrically connected to different poles of the feed source 20 respectively, so as to form a circuit connection state that the equivalent inductor 13 is electrically connected between the two poles of the feed source 20, wherein the reference ground 12 and the radiation source 11 are arranged at a distance from each other, and the reference ground 12 is electrically connected to one pole of a power supply source for supplying power to the feed source 20, wherein the feed 20 is arranged to be allowed to be powered to generate a feed signal between its positive pole and ground, the antenna body 10 can transmit a microwave beam corresponding to the frequency of the feeding signal under the action of the feeding signal generated by the feeding source 20 equivalent to the circuit structure principle illustrated in fig. 2B, and receiving a reflected echo formed by the microwave beam reflected by the corresponding object to feed back an echo signal corresponding to the frequency of the reflected echo.

Referring to the drawings in the specification of the present invention, fig. 2B illustrates, wherein the feed source 20 generates the feed signal, the antenna body 10 is equivalent to an inductance L0 and a capacitance C0 that are connected in series with each other and in the feed point 111 electric connection between the two poles of the feed source 20, the equivalent inductance 13 is so that the radiation source 11 is in the feed point 111 is generated by the feed source 20 during the feed signal feed, the impedance of the antenna body 10 at the resonant working frequency point thereof can be reduced, and the bandwidth of the antenna body 10 at the resonant working frequency point thereof is correspondingly narrowed, so as to improve the interference of the electromagnetic environment to the echo signal in a mode of the selectivity of the antenna body 10 to the resonant working frequency, and correspondingly improve the anti-interference performance of the anti-interference microwave detection module.

Further, the equivalent inductor 13 is a component or a circuit having an inductance characteristic under the action of the feeding signal of the feed source 20, such as one or more combinations of an inductive element, a resistive element, and a microstrip line, that is, the equivalent inductor 13 may be set to one or more combinations of three categories of an inductive element, a resistive element, and a microstrip line, and the number of any category is not limited, so that the equivalent inductor 13 has diversified structural and morphological designs, thereby being beneficial to improving the adaptability of the anti-interference microwave detection module to different structural designs and circuit layout requirements.

It should be noted that in a state where the equivalent inductor 13 is electrically connected between two poles of the feed source 20, the impedance of the antenna body 10 at the resonant working frequency point thereof can be reduced, and mainly corresponds to the reduction of the loss impedance of the antenna body 10, that is, although the quality factor (i.e. Q value) of the antenna body 10 can be improved by reducing the impedance of the antenna body 10 at the resonant working frequency point thereof through the electrical connection between the two poles of the feed source 20 by the equivalent inductor 13, so as to narrow the bandwidth of the antenna body 10 at the resonant working frequency point thereof, the reduction of the impedance of the antenna body 10 at the resonant working frequency point thereof is mainly embodied as the reduction of the loss impedance of the antenna body 10 by the closed-loop connection of the equivalent inductor 13 to the feed source 20, that is, in a state where the equivalent inductor 13 is electrically connected between two poles of the feed source 20, since the radiation impedance of the antenna body 10 can be maintained and the radiation power corresponding to the antenna body 10 can be maintained, the radiation power of the antenna body 10 can be maintained while the anti-interference performance of the anti-interference microwave detection module is improved by improving the selectivity of the antenna body 10 to the resonant operating frequency in a manner of improving the quality factor of the antenna body 10 based on the technical means of the closed-loop connection of the equivalent inductor 13 to the feed source 20 at the feed point 111.

That is, compared to the conventional technical means of improving the quality factor of the antenna body 10 by empirical design of the shape, size and mutual position relationship of the radiation source 11 and the reference ground 12 of the antenna body 10, the technical means of the present invention based on the closed-loop connection of the equivalent inductor 13 to the feed source 20 at the feed point 111 can maintain the radiation power of the antenna body 10 while improving the quality factor of the antenna body 10.

In particular, in this embodiment of the present invention, in the circuit structure state that the feed source 20 is connected to the feed point 111 in a closed loop by the equivalent inductor 13, two ends of the equivalent inductor 13 are electrically connected to different poles of the feed source 20 respectively and are not limited by specific polarities, that is, when one end of the equivalent inductor 13 connected to the feed point 111 is electrically connected to the positive pole of the feed source 20, the other end of the equivalent inductor 13 is electrically connected to the ground pole of the feed source 20, or when one end of the equivalent inductor 13 connected to the feed point 111 is electrically connected to the ground pole of the feed source 20, the other end of the equivalent inductor 13 is electrically connected to the positive pole of the feed source 20, so that the feed line design of the radiation source 11 can be separated from the classical circuit structure design and have diversified circuit structure and layout design, therefore, the adaptability of the anti-interference microwave detection module to different structural designs and circuit layout requirements is improved.

Further, in this embodiment of the present invention, the reference ground 12 is electrically connected to the one of the poles of the power supply source for supplying power to the feed source 20 and is not limited by specific polarity, so as to make the circuit design of the anti-interference microwave detection module capable of being separated from the classical circuit structure design and further having diversified circuit structure and layout design, thereby being beneficial to improving the adaptability of the anti-interference microwave detection module to different structure designs and circuit layout requirements.

Specifically, the feed source 20 is a three-port functional circuit unit, in which in a state where one end of the equivalent inductor 13 connected to the feed point 111 is electrically connected to a positive electrode of the feed source 20, and the other end of the equivalent inductor 13 is electrically connected to a ground electrode of the feed source 20, the ground electrode of the feed source 20 is electrically connected to a ground electrode of a power supply source supplying power to the feed source 20, and in a state where one end of the equivalent inductor 13 connected to the feed point 111 is electrically connected to a ground electrode of the feed source 20, and the other end of the equivalent inductor 13 is electrically connected to a positive electrode of the feed source 20, the positive electrode of the feed source 20 is electrically connected to a positive electrode of the power supply source supplying power to the feed source, that is, in a state where the feed source 20 is supplied with power by the power supply source, one of the positive electrode and the ground electrodes of the feed source 20 is electrically connected to the corresponding electrodes of the power supply source, the feed 20 is thus a functional circuit unit with three ports in an independent state.

Therefore, when one end of the equivalent inductor 13 connected to the feeding point 111 is electrically connected to the positive electrode of the feeding source 20, the other end of the equivalent inductor 13 is electrically connected to the ground electrode of the feeding source 20, and the reference ground 12 is electrically connected to the ground of the feed 20 and to the ground of the power supply supplying the feed 20, the anti-interference microwave detection module corresponds to the structure of the traditional microwave detector, by electrically connecting the radiation source 11 to the ground of the feed source 20 at the feeding point 111 via the equivalent inductor 13, a circuit structure state of the feed source 20 at the feeding point 111 and connected by the equivalent inductor 13 in a closed loop is formed, therefore, the anti-interference microwave detection module can be easily implemented based on the structure of the traditional microwave detector, is simple and feasible and has low cost.

Further, owing to by equivalent inductance 13 is in feed point 111 is right feed source 20 closed loop connection's technical means is right antenna body 10 mainly embodies at the impedance reduction of its resonance working frequency point antenna body 10's loss impedance's reduction, and it has improved to correspond antenna body 10's initial polarization is right feed signal's intensity requirement, on this basis, the utility model discloses it is further right feed source 20 carries out optimal design in order to improve anti-interference microwave detection module's stability.

Specifically, referring to fig. 3A and 4A of the drawings of the present invention, in a state where the feed source 20 is designed in a discrete component form, and connected according to different polarities of the feed point 111, the equivalent circuit principle of the anti-interference microwave detection module according to two preferred embodiments of the present invention is respectively illustrated, wherein the feed source 20 is designed in an oscillation circuit form and has a three-stage circuit processor 21, wherein corresponding to fig. 3A, in a state where one end of the equivalent inductor 13 electrically connected to the feed point 111 is electrically connected to the positive electrode of the feed source 20, one end of the equivalent inductor 13 electrically connected to the feed point 111 is electrically coupled to the bus terminal 211 of the three-stage circuit processor 21 in a capacitive coupling manner and electrically connected to the positive electrode of the feed source 20, the bus terminal 211 is a port where the current of the three-stage circuit processor 21 is collected and flowed out, when the tertiary circuit processor 21 is configured as a MOS transistor, the junction 211 is a source of the MOS transistor, and when the tertiary circuit processor 21 is configured as a triode, the junction 211 is an emitter of the triode, so as to facilitate increasing the current strength of the feeding signal for feeding the antenna body 10 and ensure the strength requirement of the initial polarization of the antenna body 10 on the feeding signal.

Illustratively, referring to fig. 3B of the drawings accompanying the present invention, an implementation structure of the anti-interference microwave detection module corresponding to the above-mentioned optimized embodiment illustrated in fig. 3A is illustrated, wherein in this exemplary structure of the present invention, the reference ground 12 is electrically connected to the ground of the feed source 20 and is electrically connected to the ground of the power supply source supplying power to the feed source 20, so that in a state where the one end of the equivalent inductor 13 electrically connected to the feed point 111 is electrically connected to the positive pole of the feed source 20, the other end of the equivalent inductor 13 is electrically connected to the reference ground 12 and is electrically connected to the ground of the feed source 20.

Specifically, in this exemplary structure of the present invention, the antenna body 10 is configured as a planar antenna and has the radiation source 11 and the reference ground 12 in a planar state, wherein the radiation source 11 and the reference ground 12 are spaced apart in a nearly parallel state, wherein the radiation source 11 is electrically connected to the positive electrode of the feed source 20 at the feeding point 111 and is electrically connected to the reference ground 12 through the equivalent inductor 13, so as to form a circuit connection relationship in which the equivalent inductor 13 is connected to two electrodes of the feed source 20 in a closed loop in a state in which the reference ground 12 is electrically connected to the ground electrode of the feed source 20.

Further, in this exemplary structure of the present invention, the feeding point 111 is located at a position deviated from the physical center point of the radiation source 11, wherein a connection direction of the feeding point 111 to the physical center point of the radiation source 11 is a polarization direction of the radiation source, and a straight line passing through the physical center point of the radiation source and perpendicular to the polarization direction of the radiation source 11 on the radiation source 11 is a zero potential line of the radiation source 11, wherein any point located on the zero potential line on the radiation source 11 is a reference level point 112, wherein the radiation source 11 is electrically connected to the positive pole of the feed source at the feeding point 111 and is electrically connected to the ground pole of the feed source 20 at least one reference level point 112, so as to form the equivalent inductance 13 between the feeding point 111 and the reference level point 112 of the radiation source 11 by the high frequency characteristic of the feeding signal of the feed source 20, thereby being beneficial to simplifying the circuit structure of the anti-interference microwave detection module.

That is to say, in this example structure of the present invention, the anti-interference microwave detection module is corresponding to the circuit structure state of the feed source 20 connected to the feed point 111 by the equivalent inductor 13 in a closed loop manner in a manner that the radiation source 11 is electrically connected to the reference level point 112 and the reference ground 12 on the basis of the structure of the conventional microwave detector, so that the anti-interference microwave detection module can be easily implemented based on the structure of the conventional microwave detector, and is simple and easy to implement, and the cost is low.

It is worth mentioning that, based on the charge distribution form of the radiation source 11 in the fed state, the reference level point 112 is a zero potential point on the radiation source 11, so that when the feed source 20 is in a state where the feed point 111 and the reference level point 112 are connected by the equivalent inductor 13 in a closed loop, a reduction effect on the loss impedance of the antenna body 10 is formed, and at the same time, the radiation impedance of the antenna body 10 is further ensured not to be reduced, thereby reducing the frequency bandwidth of the antenna body 10 at the resonant working frequency point to improve the anti-interference performance of the anti-interference microwave detection module in a manner of improving the selectivity of the antenna body 10 on the resonant working frequency, and maintaining the radiation power of the antenna body 10.

Corresponding to fig. 4A, in a state that one end of the equivalent inductor 13 electrically connected to the feeding point 111 is electrically connected to the ground of the feed source 20, when the tertiary circuit processor 21 is configured as a MOS transistor, one end of the equivalent inductor 13 electrically connected to the feeding point 111 is electrically connected to the drain of the MOS transistor and electrically connected to the ground of the feed source 20, and when the tertiary circuit processor 21 is configured as a triode, one end of the equivalent inductor 13 electrically connected to the feeding point 111 is electrically connected to the collector of the triode and electrically connected to the ground of the feed source 20, wherein the other end of the equivalent inductor 13 is electrically connected to the positive of the feed source 20, so as to facilitate current convergence of the feeding point in a closed-loop connection state of the equivalent inductor 13 to the feed source 20 at the feeding point 111 and correspondingly improve current convergence of the feed signal fed to the antenna body 10 in a state that the equivalent inductor 13 is electrically connected to the ground of the feed point 111 The current strength, and thus the strength requirement of the initial polarization of the antenna body 10 on the feed signal, is guaranteed.

It is worth mentioning that, by means of the closed-loop connection of the equivalent inductor 13 to the feed source 20 at the feed point 111, in a state that one end of the equivalent inductor 13 electrically connected to the feed point 111 is electrically connected to the ground of the feed source 20, and the other end of the equivalent inductor 13 is electrically connected to the positive pole of the feed source 20, the current strength of the feed signal for feeding the antenna body 10 is more favorable for the current convergence of the feed point 111 and the integrity of the feed signal than the conventional feed line illustrated in fig. 1A, the control of the radiation source 11 by the feed signal is correspondingly enhanced, the stability of the microwave detection module against interference is favorably improved, and the strength requirement of the initial polarization of the antenna body 10 on the feed signal can be ensured due to the correspondingly enhanced current strength of the feed signal for feeding the antenna body 10, and increasing the radiation power of the anti-interference microwave detection module under the corresponding emission power limit.

Furthermore, it is worth mentioning that in the circuit structure state where the radiation source 11 is electrically coupled to the ground of the feed source 20 at the feeding point 111 and is electrically connected to the positive electrode of the feed source 20 at the feeding point 111 via the equivalent inductor 13, the transmission path of the feed signal in the feed source 20 allows to avoid using capacitive coupling with respect to the conventional feed path and the feed path illustrated in fig. 3A, thereby reducing the component cost of the feed source 20 and improving the transmission efficiency of the anti-jamming microwave detection module.

Furthermore, the present invention improves the antenna body 10 by electrically connecting one end of the equivalent inductor 13 to the feeding point 111 of the radiation source 11, so that when the antenna body 10 is electrically connected to different poles of the feed source 20 at two ends of the equivalent inductor 13, respectively, the impedance of the antenna body 10 at the resonant working frequency point is reduced by the closed-loop connection of the equivalent inductor 13 to the feed source 20, and the impedance of the antenna body 10 at the resonant working frequency point is mainly reduced by reducing the loss impedance of the antenna body 10, so as to maintain the radiation power of the antenna body 10 while improving the anti-interference performance of the anti-interference microwave detection module by narrowing the frequency bandwidth of the antenna body 10 at the resonant working frequency point and improving the selectivity of the antenna body 10 to the resonant working frequency, the two ends of the equivalent inductor 13 of the anti-interference microwave detection module are electrically connected to different poles of the feed source 20 respectively and are not limited by specific polarities, and the feed source 20 is not limited by specific types.

Exemplarily, referring to fig. 4B of the drawings of the present invention, the anti-interference microwave detection module corresponding to a modified embodiment of the above-mentioned optimized embodiment illustrated in fig. 4A is illustrated, wherein a state that one end of the equivalent inductor 13 corresponding to fig. 4A electrically connected to the feeding point 111 is electrically connected to the ground of the feed source 20, and the other end of the equivalent inductor 13 is electrically connected to the positive electrode of the feed source 20, in this modified embodiment of the present invention, the feed source 20 is designed in an integrated circuit form to include a microwave chip 21, wherein both ends of the equivalent inductor 13 are respectively electrically connected to different poles of the feed source 20 and are not limited by specific polarities, and particularly, in this modified embodiment of the present invention, one end of the equivalent inductor 13 electrically connected to the feeding point 111 is electrically connected to the ground of the feed source 20, and the other end of the equivalent inductor 13 is electrically connected to the positive electrode of the feed source 20, so as to facilitate the current convergence of the feed point 111 and correspondingly improve the current strength of the feed signal for feeding the antenna body 10, thereby ensuring the strength requirement of the initial polarization of the antenna body 10 on the feed signal, and improving the radiation power of the anti-interference microwave detection module under the corresponding emission power limitation.

Specifically, the microwave chip 21 has a transmitting end 211 and a receiving end 212, wherein in a state that one end of the equivalent inductor 13 electrically connected to the feeding point 111 is electrically connected to the ground of the feeding source 20, the microwave chip 21 is electrically connected to the feeding point 111 of the radiation source 11 at the transmitting end 211 to feed the radiation source 11 with the feeding signal, and the microwave chip 21 is electrically coupled to the feeding point 111 of the radiation source 11 at the receiving end 212 through at least one capacitor to receive the echo signal.

It is worth mentioning that, based on the closed-loop connection of the equivalent inductor 13 to the feed source 20, the transmitting terminal 211 of the microwave chip 21 is electrically connected to the anode of the feed source 20 through the equivalent inductor 13, so as to allow avoiding an additional inductor at the transmitting terminal 211 of the microwave chip 21 and reduce the component cost of the feed source 20 compared with a conventional microwave chip, and further improve the anti-interference performance of the anti-interference microwave detection module in a manner of narrowing the bandwidth of the feed signal.

In particular, in this variant embodiment of the present invention, in a state where the reference ground 12 is electrically connected to a ground of a power supply source supplying power to the feed source 20, the positive electrode of the feed source 20 further forms a corresponding distributed capacitance with the reference ground 12 to have a decoupling effect on the power supply source supplying power to the feed source 20, thereby facilitating to improve the circuit stability of the feed source 20.

With further reference to fig. 5A and 5B of the drawings of the present application, corresponding to the states of fig. 4A and 4B where one end of the equivalent inductor 13 electrically connected to the feeding point 111 is electrically connected to the ground of the feeding source 20 and the other end of the equivalent inductor 13 is electrically connected to the positive pole of the feeding source 20, an implementation structure of the anti-interference microwave detection module of the above embodiment is illustrated, wherein in this implementation structure of the present application, the antenna body 10 is configured as a planar antenna and has the radiation source 11 and the reference ground 12 in a planar state, wherein the radiation source 11 is spaced from the reference ground 12 in a state of approaching to parallel, wherein the feeding point 111 is located on the radiation source 11 at a position deviating from the physical center point of the radiation source, wherein the direction of the connection line of the feeding point 111 of the radiation source 11 to the physical center point thereof is the polarization direction of the radiation source 11 And a line passing through a physical center point of the radiation source 11 and perpendicular to a polarization direction of the radiation source 11 on the radiation source 11 is a zero potential line of the radiation source 11, wherein any point on the radiation source 11 located on the zero potential line is a reference level point 112, wherein the radiation source 11 is electrically connected to a ground of the feed source 20 at the feeding point 111 and is electrically connected to an anode of the feed source 20 at least at one of the reference level points 112, so as to form the equivalent inductor 13 between the feeding point 111 and the reference level point 112 of the radiation source 11 by a high frequency characteristic of a feeding signal of the feed source 20, thereby facilitating to simplify a circuit structure of the anti-interference microwave detection module.

Specifically, in this exemplary structure of the present invention, the reference ground 12 is electrically connected to the positive pole of the feed source 20 and is electrically connected to the positive pole of the power supply source supplying power to the feed source 20 when the feed source 20 is powered, in detail, the radiation source 11 is electrically connected to the positive pole of the feed source 20 at the reference level point 112 in a state of being connected to the reference ground 12 and is electrically connected to the ground of the feed source 20 at the feeding point 111 in a state of being isolated from the reference ground 12 and penetrating through the reference ground 12, in particular, a structure and a process of a metalized via hole form a state of being isolated from the reference ground 12 and penetrating through the reference ground 12 at the feeding point 111 and form a state of being connected to the reference ground 12 at the reference level point 112.

It is worth mentioning that, in other exemplary structures of the present invention, the reference ground 12 is electrically connected to the ground pole of the feed source 20, which is not limited by the present invention.

With further reference to fig. 6A and 6B of the drawings of the present application, based on the implementation structure of the antenna body 10 illustrated in fig. 5A and 5B, two implementation structures of the anti-interference microwave detection module corresponding to the above-mentioned modified embodiment of fig. 4B are further illustrated, and similarly, in these two implementation structures of the present invention, the antenna body 10 is configured as a planar antenna and has the radiation source 11 and the reference ground 12 in a planar state, wherein the radiation source 11 and the reference ground 12 are spaced in a parallel state, wherein the feeding point 111 is located on the radiation source 11 at a position deviating from a physical central point of the radiation source, wherein a connection line direction of the feeding point 111 of the radiation source 11 to the physical central point thereof is a polarization direction of the radiation source 11, and a straight line on the radiation source 11 is perpendicular to the polarization direction of the radiation source 11 through the physical central point of the radiation source The line is a zero potential line of the radiation source 11, wherein any point on the radiation source 11 located on the zero potential line is a reference level point 112, wherein the radiation source 11 is electrically connected to the ground of the feed source at the feeding point 111 and is electrically connected to the anode of the feed source 20 at least at one of the reference level points 112, so as to form the equivalent inductor 13 between the feeding point 111 and the reference level point 112 of the radiation source 11 by the high frequency characteristic of the feeding signal of the feed source 20, thereby facilitating to simplify the circuit structure of the anti-interference microwave detection module.

In particular, in both exemplary configurations of the present invention, the feed 20 is designed in the form of an integrated circuit comprising a microwave chip 21, wherein one end of the equivalent inductor 13 electrically connected to the feeding point 111 is electrically connected to the ground of the feeding source 20, and the other end of the equivalent inductor 13 is electrically connected to the positive electrode of the feeding source 20, wherein the microwave chip 21 has a transmitting end 211 and a receiving end 212, wherein in the state that one end of the equivalent inductor 13 electrically connected to the feeding point 111 is electrically connected to the ground of the feeding source 20, the microwave chip 21 is electrically connected to the feeding point 111 of the radiation source 11 at the transmitting end 211 to feed the radiation source 11 with the feeding signal, the microwave chip 21 is electrically coupled to the feeding point 111 of the radiation source 11 at the receiving end 212 through a capacitor to receive the echo signal.

In particular, with respect to the tamper resistant microwave detection module illustrated in FIG. 6A, in the tamper resistant microwave detection module illustrated in FIG. 6B, the radiation source 11 of the antenna body 10 is disposed concavely in the direction of the zero potential line, specifically, the edge of the radiation source 11 in the direction of the zero potential line is concavely arranged in a direction towards the physical center point of the radiation source 11, this is done to enable a reduction in the size of the radiation source 11 while maintaining the circumference of the radiation source 11, thereby being beneficial to reducing the size of the anti-interference microwave detection module while maintaining the radiation power of the anti-interference microwave detection module, and to improve the balance of stray near field radiation of the antenna body 10 in a manner that enhances the self-coupling of the radiation source 11, further, the generation of the secondary lobe of the antenna body 10 is suppressed, and the anti-interference performance of the anti-interference microwave detection module is further improved.

In particular, referring to fig. 7A and 7B of the drawings of the present disclosure, two other implementation structures of the anti-interference microwave detection module corresponding to the implementation structures of the anti-interference microwave detection module illustrated in fig. 6A and 6B are further illustrated based on the deformation of the feed source 20, wherein the two implementation structures of the anti-interference microwave detection module are different from the implementation structures of the anti-interference microwave detection module illustrated in fig. 6A and 6B, in the two exemplary structures of the present disclosure, the radiation source 11 is electrically connected to the positive electrode of the feed source 20 through an additional inductor or resistor at least one of the reference level points 112, so as to form the state that the transmitting terminal 211 of the microwave chip 21 is electrically connected to the positive electrode of the feed source 20 through the equivalent inductor 13 and the additional inductor or resistor connected in series with the equivalent inductor 13, thereby further improving the interference resistance of the anti-interference microwave detection module in a manner of narrowing the bandwidth of the feed signal The performance of the interference.

It is worth mentioning that, based on the closed-loop connection of the equivalent inductor 13 to the feed source 20, the transmitting terminal 211 of the microwave chip 21 is electrically connected to the positive electrode of the feed source 20 through the equivalent inductor 13, so that the design based on the corresponding parameters of the equivalent inductor 13 can also further improve the anti-interference performance of the anti-interference microwave detection module in a manner of narrowing the bandwidth of the feed signal, that is, in the two exemplary structures of the present invention, the inductor or the resistor connected in series between the equivalent inductor 13 and the positive electrode of the feed source 20 also has an inductive characteristic and is equivalent to the inductor under the effect of the feed signal, so that under the design based on the corresponding parameters of the equivalent inductor 13, corresponding to the implementation structure of the anti-interference microwave detection module illustrated in fig. 6A and 6B, the inductor or the resistor connected in series between the equivalent inductor 13 and the positive electrode of the feed source 20 can be reduced without being set The component cost of the feed 20.

With further reference to fig. 8A and 8B of the drawings of the present application, another implementation structure of the anti-jamming microwave detection module corresponding to the implementation structure of the anti-jamming microwave detection module illustrated in fig. 6A and 6B is further illustrated based on the deformation of the antenna body 10, and likewise, in this implementation structure of the present invention, the antenna body 10 is configured as a planar antenna and has the radiation source 11 and the reference ground 12 in a planar state, wherein the radiation source 11 and the reference ground 12 are spaced in a state of tending to be parallel, wherein the feeding point 111 is located on the radiation source 11 at a position deviating from a physical central point of the radiation source, wherein a connection direction of the feeding point 111 of the radiation source 11 to the physical central point thereof is a polarization direction of the radiation source 11, and a polarization direction on the radiation source 11 passing through the physical central point of the radiation source and perpendicular to the polarization direction of the radiation source 11 The straight line in the direction is a zero potential line of the radiation source 11, wherein any point of the radiation source 11 located on the zero potential line is a reference level point 112, wherein the radiation source 11 is electrically connected to the ground of the feed source at the feeding point 111 and is electrically connected to the positive electrode of the feed source 20 at least at one of the reference level points 112, so as to form the equivalent inductor 13 between the feeding point 111 and the reference level point 112 of the radiation source 11 by the high frequency characteristic of the feeding signal of the feed source 20, thereby facilitating to simplify the circuit structure of the anti-interference microwave detection module.

In particular, in this exemplary structure of the present invention, the antenna body 10 further includes a radiation source substrate 14 and a ground reference substrate 15, wherein the ground reference 12 is fixed between the radiation source substrate 14 and the ground reference substrate 15, and wherein the radiation source 11 and the ground reference 12 are separated by the radiation source substrate 14 and spaced apart in a parallel state.

Further, the radiation source 11, the radiation source base plate 14, the reference ground 12 and the reference ground base plate 15 are fixed with a laminated plate structure and a process, and a specific structural form shows that the radiation source base plate 14 and the reference ground base plate 15 are in the polarization direction and the zero potential line direction have the same size, wherein based on different lamination processes, the specific structure of the antenna body 10 is various, and on the basis of the structure that the radiation source base plate 14 and the reference ground base plate 15 have the same size in the polarization direction and the zero potential line direction, the utility model discloses do not further limit to the specific structure of the antenna body 10 that adopts laminated plate structure and process.

It is worth mentioning that, based on the structure and process of the laminated board, the distance between the radiation source 11 and the reference ground 12 has good consistency, so that on the basis that the impedance of the antenna body 10 at the resonant working frequency point is reduced due to the closed-loop connection between the equivalent inductor 13 and the two poles of the feed source 20, based on the structure and process of the laminated board, the consistency of the impedance of the antenna body 10 at the resonant working frequency point can be ensured to improve the stability of the anti-interference microwave detection module. That is, based on the closed-loop connection between the equivalent inductor 13 and the two poles of the feed source 20, the impedance of the antenna body 10 at the resonant operating frequency point thereof is lowered, and the uniformity difference of the quality factor of the antenna body 10 is amplified, so that the antenna body 10 is preferably manufactured in a laminated board structure and process, corresponding to a structural form in which the radiation source substrate 14 and the reference ground substrate 15 have the same size in the polarization direction and the zero potential line direction.

Also, in this exemplary structure of the present invention, the feed source 20 is designed in an integrated circuit form to include a microwave chip 21, wherein one end of the equivalent inductor 13 electrically connected to the feed point 111 is electrically connected to the ground of the feed source 20, and the other end of the equivalent inductor 13 is electrically connected to the positive electrode of the feed source 20, that is, the radiation source 11 is electrically connected to the ground of the feed source 20 at the feed point 111 and is electrically connected to the positive electrode of the feed source 20 at least one of the reference level points 112, so as to form the equivalent inductor 13 between the feed point 111 and the reference level point 112 of the radiation source 11, wherein the microwave chip 21 has a transmitting end 211 and a receiving end 212, wherein in a state where one end of the equivalent inductor 13 electrically connected to the feed point 111 is electrically connected to the ground of the feed source 20, the microwave chip 21 is electrically connected to the feeding point 111 of the radiation source 11 at the transmitting end 211 to feed the radiation source 11 with the feeding signal, and the microwave chip 21 is electrically coupled to the feeding point 111 of the radiation source 11 at the receiving end 212 via a capacitor to receive the echo signal.

Further, in this exemplary structure of the present invention, the reference ground 12 is electrically connected to the positive pole of the feed source 20 and is electrically connected to the positive pole of the power supply source supplying power to the feed source 20 when the feed source 20 is supplied with power, in detail, the radiation source 11 is electrically connected to the positive pole of the feed source 20 at the reference level point 112 in a state of being connected to the reference ground 12 and is electrically connected to the ground of the feed source 20 at the feeding point 111 in a state of being isolated from the reference ground 12 and penetrating through the reference ground 12, in particular, a structure and a process of a metalized via hole form a state of being isolated from the reference ground 12 and penetrating through the reference ground 12 at the feeding point 111 and form a state of being connected to the reference ground 12 at the reference level point 112.

It is worth mentioning that, in other example structures of the utility model, the reference ground 12 is electrically connected in the ground pole of the feed source 20, so as to be based on the positive pole of the feed source 20 with the distributed capacitance that the reference ground 12 formed is right the decoupling effect of the power supply source of the feed source 20 power supply improves the circuit stability of the feed source 20, the utility model discloses do not limit to this.

With further reference to fig. 9A and 9B of the drawings of the present application, two other implementation structures of the anti-jamming microwave detection module corresponding to the implementation structures of the anti-jamming microwave detection module illustrated in fig. 8A and 8B are further illustrated based on the deformation of the antenna body 10, specifically, in the two example structures of the present invention, the radiation source 11 has two feeding points 111 in an orthogonal state, that is, a connection line of one of the feeding points 111 of the radiation source 11 and the physical central point of the radiation source 11 is perpendicular to a connection line of the other feeding point 111 of the radiation source 11 and the physical central point of the radiation source 11, so as to distinguish from the feeding and receiving of the echo signal to the radiation source 11 by the same feeding point 111 illustrated in fig. 8A and 8B, where the radiation source 11 is fed by the feeding signal and is connected to the other feeding point 111 When receiving the echo signal, the interference of the microwave beam emitted by the antenna body 10 to the echo signal can be reduced, so as to improve the anti-interference performance of the anti-interference microwave detection module.

Further, in the two exemplary structures of the present invention, the feed source 20 is designed in an integrated circuit form and includes a microwave chip 21, wherein the microwave chip 21 has a transmitting end 211 and a receiving end 212, wherein the radiation source 11 is electrically connected to the ground of the feed source 20 at one of the feeding points 111 electrically connected to the transmitting end 211 of the microwave chip 21, and is further electrically connected to the positive electrode of the feed source 20 at the feeding point 111 via the equivalent inductor 13.

In particular, in the two exemplary structures of the present invention, one of the feeding points 111 of the radiation source 11 is disposed in a side feeding manner, and is provided with a radiation source main body 113 and a side feeding line 114 close to one of the sides of the radiation source main body 113 corresponding to the radiation source 11, wherein the two feeding points 111 of the radiation source 11 are respectively disposed on the radiation source main body 113 and the side feeding line 114 in an orthogonal state, based on the two feeding points 111 being in the orthogonal state and the side feeding setting of the radiation source 11, the reference level point 112 is located at a physical center point of the radiation source main body 113, that is, the physical center point of the radiation source main body 113 is a zero potential point on the radiation source 11.

Further, in the two exemplary structures of the present invention, the radiation source 11 is electrically connected to the ground of the feed source 20 at the feeding point 111 of the radiation source main body 113 and is electrically connected to the emitting end 211 of the microwave chip 21, and is electrically connected to the positive of the feed source 20 at the reference level point 112, that is, the equivalent inductor 13 is formed between the feeding point 111 of the radiation source main body 113 and the reference level point 112, wherein the microwave chip 21 is electrically connected to the feeding point 111 of the radiation source main body 113 at the emitting end 211 to feed the radiation source main body 113 with the feeding signal, the microwave chip 21 is electrically connected to the feeding point 111 of the edge feeder 114 at the receiving end 212 to generate the capacitance characteristic based on the approach of the edge feeder 114 and the radiation source main body 113, the microwave chip 21 is formed at the receiving end 212 and electrically coupled to the equivalent circuit connection of the radiation source main body 113 through a capacitor to receive the echo signal.

In particular, with respect to fig. 9B, in the exemplary structure corresponding to fig. 9A, the radiation source 11 is electrically connected to the positive electrode of the feeding source 20 through an additional inductor or resistor at the reference level point 112, so as to form a state that the transmitting end 211 of the microwave chip 21 is electrically connected to the positive electrode of the feeding source 20 through the equivalent inductor 13 and the additional inductor or resistor connected in series with the equivalent inductor 13, thereby further improving the anti-interference performance of the anti-interference microwave detection module in a manner of narrowing the bandwidth of the feeding signal.

It is worth mentioning that, based on the closed-loop connection of the equivalent inductor 13 to the feed source 20, the transmitting terminal 211 of the microwave chip 21 is electrically connected to the positive electrode of the feed source 20 through the equivalent inductor 13, so that the corresponding parameter design based on the equivalent inductor 13 can also further improve the anti-interference performance of the anti-interference microwave detection module in a manner of narrowing the bandwidth of the feed signal, that is, in the two exemplary structures of the present invention, the inductor or resistor connected in series between the equivalent inductor 13 and the positive electrode of the feed source 20 also has an inductive characteristic and is equivalent to an inductor under the action of the feed signal, so that under the corresponding parameter design of the equivalent inductor 13, corresponding to the implementation structure of the anti-interference microwave detection module illustrated in fig. 9B, the inductor or resistor connected in series between the equivalent inductor 13 and the positive electrode of the feed source 20 can be reduced without being set 20 component cost.

Similarly, with respect to fig. 9B, in the exemplary structure corresponding to fig. 9A, the receiving end 212 of the microwave chip 21 is electrically connected to the feeding point 111 of the edge feeding line 114 through an additional inductor or resistor, so as to form an equivalent circuit connection relationship that the receiving end 212 of the microwave chip 21 is electrically coupled to the radiation source main body 113 through a capacitor and the additional inductor or resistor connected in series with the capacitor, thereby further improving the anti-jamming performance of the anti-jamming microwave detection module in a manner of frequency-selecting the echo signal.

With further reference to fig. 10 of the drawings of the present specification, the implementation structure of the anti-interference microwave detection module corresponding to the schematic diagrams of fig. 9A and 9B is based on the deformation of the antenna body 10, another implementation of the tamper-resistant microwave detection module is further illustrated, differing from the implementation of the tamper-resistant microwave detection module illustrated in fig. 9A and 9B, in this exemplary structure of the present invention, the two feeding points 111 of the radiation source 11 are arranged in a side feeding manner, the radiation source 11 has a radiation source body 113 and two side feeding lines 114 respectively adjacent to two adjacent sides of the radiation source body 113, wherein two of said feeding points 111 of said radiation source 11 are respectively arranged to two of said feeder lines 114, the reference level point 112 is also located at the physical center point of the radiation source body 113.

Further, based on the spacing state where the edge feed line 114 is close to the radiation source main body 113, in this exemplary structure of the present invention, one end of the equivalent inductor 13 is electrically connected to the feeding point 111 of the radiation source 11, which is electrically connected to the transmitting end 211 of the microwave chip 21, and is electrically connected to the ground of the feed source 20, the other end of the equivalent inductor 13 is electrically connected to the positive electrode of the feed source 20, namely, the radiation source 11 is electrically connected to the ground of the feed source 20 at one of the feeding points 111 and the transmitting end 211 of the microwave chip 21, and is further electrically connected with the positive electrode of the feed source 20 at the feeding point 111 through the equivalent inductor 13, thus, the structure of the equivalent inductor 13 is formed between the feeding point 111 and the reference level point 112 of the radiation source body 113 in a point feeding manner in fig. 9A and 9B.

In particular, in this exemplary structure of the present invention, one end of the equivalent inductor 13 electrically connected to the positive electrode of the feeding source 20 is further electrically connected to the reference level point 112 of the radiation source 11, so as to obtain a charge distribution pattern based on the radiation source 11 in the fed state, in the state that one end of the equivalent inductor 13 electrically connected to the positive electrode of the feed source 20 is electrically connected to the reference level point 112 of the radiation source 11, it is ensured that the radiation impedance of the antenna body 10 is not lowered, therefore, the frequency bandwidth of the antenna body 10 at the resonant working frequency point is narrowed based on the closed-loop connection of the equivalent inductor 13 to the feed source 20, so that the anti-interference performance of the anti-interference microwave detection module is improved in a mode of improving the selectivity of the antenna body 10 to the resonant working frequency, and meanwhile, the radiation power of the antenna body 10 is maintained.

Likewise, in this exemplary structure of the present invention, the receiving end 212 of the microwave chip 21 is electrically connected to another feeding point 111 through an additional inductor or resistor, so as to form an equivalent circuit connection relationship that the receiving end 212 of the microwave chip 21 is electrically coupled to the radiation source main body 113 through a capacitor and the additional inductor or resistor connected in series with the capacitor, thereby further improving the anti-interference performance of the anti-interference microwave detection module in a frequency-selective manner for the echo signal.

With further reference to fig. 11 and 12 of the drawings accompanying the present specification, the end of the equivalent inductor 13 electrically connected to the feeding point 111 corresponding to fig. 4A and 4B is electrically connected to the ground of the feeding source 20, and the other end of the equivalent inductor 13 is electrically connected to the positive electrode of the feed source 20, depending on the different types of the antenna body 10, the other two implementation structures of the anti-interference microwave detection module of the above embodiments are exemplified, wherein, corresponding to fig. 11, in this exemplary structure of the present invention, the antenna body 10 is configured as a cylindrical antenna having the radiation source 11 in a cylindrical shape and the reference ground 12 in a planar state, wherein the radiation source 11 is isolated from the reference ground 12 in a state perpendicular to the reference ground 12, wherein the feeding point 111 is located at an end of the radiation source 11 close to the reference ground 12.

Corresponding to fig. 12, in this example structure of the present invention, the antenna body 10 is configured as a dual-coupled pole antenna having a symmetrical shape and position arrangement of the radiation source 11 and the ground reference 12, wherein the radiation source 11 is electrically connected to the ground reference 12 through the equivalent inductor 13 at the feeding point 111, so as to form a state where the radiation source 11 is electrically connected to one pole of the feed source 20 and to the other pole of the feed source 20 through the equivalent inductor 13 when both ends of the equivalent inductor 13 are electrically connected to different poles of the feed source 20, specifically, in this example structure of the present invention, the radiation source 11 is electrically connected to the ground pole of the feed source 20 at the feeding point 111 and to the positive pole of the feed source 20 through the equivalent inductor 13, and the state that the reference ground 12 is electrically connected to the positive pole of the feed source 20 is formed by the state that the radiation source 11 is electrically connected to the reference ground 12 through the equivalent inductor 13 at the feed point 111.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

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. An anti-jamming microwave detection module, comprising:

2. The antijam microwave probe module of claim 1, wherein the radiation source is one of the feed points electrically connected to the ground of the feed source and the positive electrode of the feed source via the equivalent inductor, that is, one end of the equivalent inductor electrically connected to the feed point is electrically connected to the ground of the feed source, and the other end of the equivalent inductor is electrically connected to the positive electrode of the feed source.

3. The antijam microwave detection module of claim 2 wherein the equivalent inductor has one end connected to the positive terminal of the feed source and is further electrically connected to a physical center point of the radiation source body.

4. The antijam microwave probe module of claim 3 wherein the feed source is configured as a discrete component having a MOS transistor, wherein one end of the equivalent inductor electrically connected to the feed point is electrically connected to the drain of the MOS transistor and to the ground of the feed source.

5. The antijam microwave probe module of claim 3 wherein the feed source is provided in the form of a discrete component having a triode, wherein one end of the equivalent inductor electrically connected to the feed point is electrically connected to the collector of the triode and to the ground of the feed source.

6. The microwave tamper resistant detection module of claim 3 wherein the feed source is configured as an integrated circuit and comprises a microwave chip, wherein the microwave chip comprises a transmitting end and a receiving end, wherein one end of the equivalent inductor electrically connected to the feeding point is electrically connected to the ground of the feed source in such a way that the end of the equivalent inductor is electrically connected to the transmitting end, that is, the radiation source is electrically connected to the ground of the feed source at one of the feeding points in such a way that the equivalent inductor is electrically connected to the transmitting end of the microwave chip, and wherein the radiation source is electrically connected to the receiving end through at least one inductor at the other of the feeding points.

7. The tamper resistant microwave detection module of claim 6 wherein the antenna body further includes a radiation source substrate and a ground reference substrate, wherein the ground reference is secured between the radiation source substrate and the ground reference substrate, wherein the radiation source and the ground reference are separated by the radiation source substrate and spaced apart in a parallel state, wherein the radiation source substrate and the ground reference substrate have the same dimension in a direction connecting one of the feed points of the radiation source and the physical center point of the radiation source body and in a direction connecting the other of the feed points of the radiation source and the physical center point of the radiation source body.

8. The tamper resistant microwave detection module of any of claims 2 to 7 wherein the reference ground is provided electrically connected to the positive pole of the power supply supplying power to the feed when the feed is powered.

9. The antijam microwave detection module of claim 8 wherein the reference ground is electrically connected to the positive pole of the feed and when the feed is powered is electrically connected to the positive pole of the power supply that powers the feed.

10. The antijam microwave detection module of claim 9 wherein the radiation source is electrically connected to the positive terminal of the feed source from a physical center point of the radiation source body in a state of being connected to the reference ground in a metallized via structure, corresponding to a state in which an end of the equivalent inductance connected to the positive terminal of the feed source is further electrically connected to the physical center point of the radiation source body.