CN219349116U

CN219349116U - Feed circuit with adjustable excitation signal amplitude and microwave chip

Info

Publication number: CN219349116U
Application number: CN202223096227.XU
Authority: CN
Inventors: 邹高迪; 邹明志; 邹新; 邹亮
Original assignee: Shenzhen Merrytek Technology Co Ltd
Current assignee: Shenzhen Merrytek Technology Co Ltd
Priority date: 2021-11-19
Filing date: 2022-11-19
Publication date: 2023-07-14
Anticipated expiration: 2032-11-19
Also published as: CN115754916A; WO2023088451A1; CN219039354U; CN219039355U; CN115825970A; CN219302675U

Abstract

The utility model provides a feed circuit with adjustable excitation signal amplitude and a microwave chip, wherein the feed circuit with adjustable excitation signal amplitude comprises a digital logic control unit, a voltage-controlled oscillation unit and an excitation signal amplitude adjusting unit, wherein the voltage-controlled oscillation unit is electrically connected with the digital logic control unit so as to be controlled by the digital logic control unit to output an excitation signal with corresponding frequency, the excitation signal amplitude adjusting unit is electrically connected with the digital logic control unit and the voltage-controlled oscillation unit, and the digital logic control unit is capable of accessing corresponding grading control signals and controlling the excitation signal amplitude adjusting unit to adjust the effective amplitude of the excitation signal according to the accessed grading control signals, so that the effective amplitude of the excitation signal processed by the excitation signal amplitude adjusting unit can meet the setting of the grading control signals.

Description

Feed circuit with adjustable excitation signal amplitude and microwave chip

Technical Field

The utility model relates to the field of Doppler microwave detection, in particular to a feed circuit with an adjustable excitation signal amplitude and a microwave chip.

Background

With the development of the internet of things technology, the requirements of artificial intelligence, intelligent home and intelligent security technology on environment detection, especially on detection accuracy of motion characteristics of existence, movement and inching of people, are higher and higher, and accurate judgment basis can be provided for intelligent terminal equipment only by acquiring enough stable detection results. The radio technology, including the existing microwave detection technology based on the Doppler effect principle, has unique advantages in the technology of behavior detection and existence detection, and can emit a microwave beam at a fixed frequency and receive a reflected echo formed by the reflection of the microwave beam by the corresponding object under the condition of not invading the privacy of the human, and then generate a Doppler intermediate frequency signal corresponding to the frequency difference between the microwave beam and the reflected echo in a frequency mixing detection mode, so that the amplitude fluctuation of the Doppler intermediate frequency signal corresponds to the Doppler effect generated by the motion of the corresponding object, thus representing the motion of the corresponding object based on the Doppler intermediate frequency signal, and realizing intelligent interconnection between the human and the object with the response of the corresponding electrical equipment to the human activity when applied to the detection of the human activity, thereby having wide application prospect, on the one hand, the boundary of the corresponding microwave beam is a gradient boundary with radiation energy attenuated to a certain degree, on the other hand, due to the lack of effective control means of electromagnetic radiation, namely the shaping means of the corresponding microwave beam boundary, the main gradient means is used for the electromagnetic radiation boundary, the electromagnetic interference detection means is difficult to cause the interference to the fact that the electromagnetic interference is actually carried out on the main gradient boundary of the microwave beam, the detection means is not matched with the actual condition of the actual condition, and the detection space is not matched with the actual condition of the actual condition, and the actual condition is present, and the space is not available, and the condition is not is set, and the space is not matched with the actual condition of the detection space, the problems of poor precision and/or poor anti-interference performance of the existing microwave detection technology based on the Doppler effect principle are caused, namely, the boundary of the microwave beam is a gradient boundary where radiation energy is attenuated to a certain degree, and meanwhile, a shaping means for the gradient boundary of the microwave beam is lacked, so that the actual detection space of the existing microwave detection module is difficult to match with the corresponding target detection space in actual application, and the defect that the adaptability of the existing microwave detection module in different application scenes in actual application is limited and the detection stability is poor is caused.

In order to solve the above-mentioned defect of the existing microwave detection module, the present method mainly selects the microwave detection module with the actual detection space larger than the corresponding target detection space, and sets and reduces the sensitivity of the microwave detection module according to the corresponding threshold value of the doppler intermediate frequency signal in amplitude, so as to eliminate the environmental interference and the action interference of the actual detection space outside the target detection space based on the reduction of the sensitivity. However, since the amplitude of the doppler intermediate frequency signal is related to the energy of the reflected echo and is also related to the area of the reflecting surface in the environment, the size of the reflecting surface and the moving speed of the moving object and the distance from the microwave detection module, environmental interference and motion interference of the actual detection space outside the target detection space cannot be accurately excluded based on the reduction of the sensitivity of the microwave detection module, so that the detection of the target detection space is not stable and accurate, for example, different moving objects with the same distance as the microwave detection module have different amplitude feedback in the doppler intermediate frequency signal due to different reflecting surface sizes and/or moving speeds, and moving objects with a longer distance as the microwave detection module may have higher amplitude feedback in the doppler intermediate frequency signal due to larger reflecting surface and/or moving speed, that is, the reduction of the sensitivity of the microwave detection module cannot accurately exclude the environmental interference and motion interference of the actual detection space outside the target detection space, so that the microwave detection module is not stable and accurate in the actual detection space.

In addition, the reduction of the sensitivity of the microwave detection module does not affect the actual detection space of the microwave detection module, so when the actual detection space of the microwave detection module is larger than the corresponding target detection space, the reduction of the sensitivity of the microwave detection module does not correspondingly reduce the power consumption of the microwave detection module on one hand, correspondingly causes radiation loss outside the target detection space, and on the other hand, self-excitation interference of the target detection space is easy to form, particularly, a state that a high-reflection object exists in the target detection space and a state that the target detection space is not an open space exist, such as a state that the target detection space is a scene of a room and a state that a wall surface and a ground are not an open space exist.

That is, the existing microwave detection module with the actual detection space larger than the corresponding target detection space is selected, and the doppler intermediate frequency signal generated by the environmental interference and the action interference of the actual detection space outside the target detection space is removed in a manner of reducing the sensitivity of the microwave detection module, so that on one hand, the environmental interference and the action interference of the actual detection space outside the target detection space cannot be accurately removed, and the detection of the target detection space is not stable and accurate; on the other hand, the self-excitation interference of the target detection space is easy to form, so that the work of the microwave detection module is unstable, and particularly, a high-reflection object exists in the target detection space and a non-open space with wall surfaces and ground exists in the target detection space; and radiation loss outside the target detection space is not caused by correspondingly reducing the power consumption of the microwave detection module.

Disclosure of Invention

An object of the present utility model is to provide a feeding circuit and a microwave chip with adjustable excitation signal amplitude, wherein the feeding circuit with adjustable excitation signal amplitude is configured to generate an excitation signal in a powered state and to adjust an effective amplitude of the excitation signal, and the feeding circuit with adjustable excitation signal amplitude feeds a corresponding antenna in a corresponding microwave detection device with the excitation signal, and simultaneously adjusts a gradient boundary of a microwave beam in a manner of adjusting the effective amplitude of the excitation signal based on a correlation between the excitation signal amplitude and an energy density distribution of the microwave beam emitted by the corresponding microwave detection device, thereby adjusting an actual detection space of the corresponding microwave detection device, and correspondingly guaranteeing stability of the corresponding microwave detection device in practical application.

An object of the present utility model is to provide a feeding circuit and a microwave chip with an adjustable excitation signal amplitude, wherein the feeding circuit with the adjustable excitation signal amplitude comprises a voltage-controlled oscillation unit, a digital logic control unit and an excitation signal amplitude adjusting unit, wherein the voltage-controlled oscillation unit is electrically connected to the digital logic control unit and the excitation signal amplitude adjusting unit, so as to be controlled by the digital logic control unit to output an excitation signal with a corresponding frequency to the excitation signal amplitude adjusting unit, wherein the digital logic control unit is electrically connected to the excitation signal amplitude adjusting unit, and is configured to be capable of accessing a corresponding hierarchical control signal and controlling the excitation signal amplitude adjusting unit to adjust an effective amplitude of the excitation signal according to the accessed hierarchical control signal, so that the effective amplitude of the excitation signal processed by the excitation signal amplitude adjusting unit can meet the setting of the hierarchical control signal.

An object of the present utility model is to provide a feeding circuit and a microwave chip with adjustable excitation signal amplitude, wherein the effective amplitude adjustment of the excitation signal output by the voltage-controlled oscillation unit based on the excitation signal amplitude adjustment unit does not change the frequency of the excitation signal output by the voltage-controlled oscillation unit, nor affect the impedance matching between the feeding circuit with adjustable excitation signal amplitude and the corresponding antenna unit, thus being suitable for microwave detection based on the doppler effect principle.

An object of the present utility model is to provide a feeding circuit and a microwave chip with an adjustable excitation signal amplitude, wherein a connection relationship between the excitation signal amplitude adjusting unit and the voltage-controlled oscillating unit can maintain independence of an operating frequency of the voltage-controlled oscillating unit, so that an output efficiency of the excitation signal output by the voltage-controlled oscillating unit is not changed by effective amplitude adjustment of the excitation signal, so that radiation power consumption of a corresponding microwave detection device can be adjusted with the same output efficiency based on grading selection of the effective amplitude of the excitation signal by the excitation signal amplitude adjusting unit, and thus, overall power consumption of the corresponding microwave detection device is reduced in a state that the actual detection space of the corresponding microwave detection device is matched with a target detection space based on a condition of the effective amplitude of the excitation signal.

An object of the present utility model is to provide a feeding circuit and a microwave chip with adjustable excitation signal amplitude, wherein the feeding circuit with adjustable excitation signal amplitude is configured as the microwave chip with adjustable excitation signal amplitude in an integrated circuit form, so as to facilitate improving the circuit integration level of the corresponding microwave detection device.

An object of the present utility model is to provide a feeding circuit and a microwave chip with adjustable amplitude of an excitation signal, wherein the microwave chip with adjustable amplitude of the excitation signal is further integrated with an intermediate frequency amplifying unit, wherein in a state that the microwave chip with adjustable amplitude of the excitation signal is applied to a corresponding microwave detecting device, the excitation signal amplitude adjusting unit is electrically connected to the corresponding mixing unit and is fed to the corresponding antenna unit to output the excitation signal to the mixing unit and feed the antenna unit with the excitation signal, wherein the antenna unit emits a microwave beam corresponding to a frequency of the excitation signal in the fed state to form the actual detecting space, and receives a reflected echo formed by reflection of the microwave beam by a corresponding object in the actual detecting space to transmit an echo signal corresponding to the reflected echo to the mixing unit, the mixing unit outputs a doppler intermediate frequency signal corresponding to a frequency/phase between the excitation signal and the echo signal, wherein the doppler amplifying unit is electrically connected to the intermediate frequency amplifying unit to the doppler intermediate frequency to process the doppler intermediate frequency signal, the integrated microwave amplifying unit is amplified with the microwave beam corresponding to thereby enhance the microwave amplitude of the excitation signal, and the microwave chip is adjustable in the integrated with adjustable amplitude.

An object of the present utility model is to provide a feeding circuit and a microwave chip with an adjustable excitation signal amplitude, wherein the mixing unit is integrated with the microwave chip with the adjustable excitation signal amplitude, so as to enrich the functions of the microwave chip with the adjustable excitation signal amplitude, and improve the circuit integration level of the microwave detection device.

An object of the present utility model is to provide a feeding circuit and a microwave chip with adjustable excitation signal amplitude, wherein the microwave chip with adjustable excitation signal amplitude is further integrated with a signal processing unit, wherein the signal processing unit is electrically connected to the intermediate frequency amplifying unit and the digital logic control unit and is configured to be capable of extracting the effective characteristics of the doppler intermediate frequency signal, wherein the digital logic control unit generates control instructions for corresponding electrical devices based on the effective characteristics of the doppler intermediate frequency signal, thereby enriching the functions of the microwave chip with adjustable excitation signal amplitude.

An object of the present utility model is to provide a feeding circuit and a microwave chip with adjustable excitation signal amplitude, wherein the microwave chip with adjustable excitation signal amplitude is further integrated with an intermediate frequency signal adjusting unit, wherein the intermediate frequency signal adjusting unit is electrically connected to the digital logic control unit and the intermediate frequency amplifying unit, so that the digital logic control unit adjusts the amplitude of the doppler intermediate frequency signal according to the hierarchical control signal, thereby forming a sensitivity setting for a corresponding microwave detection device, and further enriching the functions of the microwave chip with adjustable excitation signal amplitude.

According to one aspect of the present utility model, there is provided a feeding circuit with an adjustable excitation signal amplitude, wherein the feeding circuit with an adjustable excitation signal amplitude comprises:

a digital logic control unit;

the voltage-controlled oscillation unit is electrically connected to the digital logic control unit and used for outputting an excitation signal with corresponding frequency under the control of the digital logic control unit; and

and the excitation signal amplitude adjusting unit is electrically connected with the digital logic control unit and the voltage-controlled oscillation unit, and the digital logic control unit is capable of receiving corresponding grading control signals and controlling the excitation signal amplitude adjusting unit to adjust the effective amplitude of the excitation signal according to the received grading control signals.

In an embodiment of the present utility model, the excitation signal amplitude adjusting unit includes at least two branch adjusting circuits, where each branch adjusting circuit includes a first MOS transistor and a second MOS transistor, where sources of the first MOS transistors of the same branch adjusting circuit are electrically connected to drains of the second MOS transistors, where gates of the second MOS transistors of each branch adjusting circuit are electrically connected to the voltage-controlled oscillating unit, sources of the second MOS transistors of each branch adjusting circuit are grounded, drains of the first MOS transistors of each branch adjusting circuit are connected to a power supply positive electrode via a resistor/inductor, gates of the first MOS transistors of each branch adjusting circuit are electrically connected to the digital logic control unit, respectively, where the digital logic control unit controls on and off of the first MOS transistors of the corresponding branch adjusting circuit according to the classification control signal, and an output end of the excitation signal amplitude adjusting unit is led out from the drains of the first MOS transistors of each branch adjusting circuit.

In an embodiment of the present utility model, the excitation signal amplitude adjusting unit includes at least two branch adjusting circuits, wherein each branch adjusting circuit includes a branch resistor/inductor and a branch MOS transistor, wherein one end of the branch resistor/inductor of the same branch adjusting circuit is electrically connected to a drain of the branch MOS transistor, wherein another end of the branch resistor/inductor of each branch adjusting circuit is electrically connected to the voltage-controlled oscillating unit and is connected to a power supply positive electrode via a resistor/inductor, a source electrode of the branch MOS transistor of each branch adjusting circuit is grounded, and a gate electrode of the branch MOS transistor of each branch adjusting circuit is electrically connected to the digital logic control unit, respectively, wherein the digital logic control unit controls on and off of the branch MOS transistor of the corresponding branch adjusting circuit according to the hierarchical control signal, and wherein an output end of the excitation signal amplitude adjusting unit is led out from another end of the branch resistor/inductor of each branch adjusting circuit.

In an embodiment of the present utility model, the excitation signal amplitude adjusting unit includes at least two branch adjusting circuits, wherein each branch adjusting circuit includes a branch resistor/inductor, a first MOS transistor and a second MOS transistor, wherein sources of the first MOS transistors of the same branch adjusting circuit are electrically connected to drains of the second MOS transistors, drains of the first MOS transistors of the same branch adjusting circuit are connected to a power supply positive electrode through the branch resistor/inductor, gates of the second MOS transistors of each branch adjusting circuit are electrically connected to the voltage-controlled oscillating unit, sources of the second MOS transistors of each branch adjusting circuit are grounded through a resistor/inductor, gates of the first MOS transistors of each branch adjusting circuit are electrically connected to the digital logic control unit, and the digital logic control unit controls on and off of the first MOS transistors of the corresponding branch adjusting circuit according to the classification control signal, wherein an output end of the excitation signal amplitude adjusting unit is led out from the sources of the second MOS transistors of each branch adjusting circuit.

In an embodiment of the present utility model, the excitation signal amplitude adjusting unit includes at least two branch adjusting circuits, where each branch adjusting circuit includes a branch resistor/inductor, a first MOS tube and at least two second MOS tubes, where each second MOS tube of the same branch adjusting circuit is disposed in parallel, a source electrode of the first MOS tube of the same branch adjusting circuit is electrically connected to a drain electrode of the second MOS tube, a drain electrode of the first MOS tube of the same branch adjusting circuit is connected to a power supply positive electrode through the branch resistor/inductor, a gate electrode of the second MOS tube of each branch adjusting circuit is electrically connected to the voltage-controlled oscillating unit, a source electrode of the second MOS tube of each branch adjusting circuit is grounded, a gate electrode of the first MOS tube of each branch adjusting circuit is electrically connected to the digital logic control unit, and the digital logic control unit controls on and off of the first MOS tube of the corresponding branch adjusting circuit according to the classification control signal, where the excitation signal is led out from the drain electrode of the branch adjusting circuit.

In an embodiment of the present utility model, the excitation signal amplitude adjusting unit includes at least two branch adjusting circuits and an output circuit, where each branch adjusting circuit includes a first MOS transistor, a second MOS transistor, and an inductor, where a drain of the first MOS transistor of the same branch adjusting circuit is connected to a power supply positive electrode through the inductor, a source of the first MOS transistor of the same branch adjusting circuit is electrically connected to a drain of the second MOS transistor, a gate of the second MOS transistor of each branch adjusting circuit is electrically connected to the voltage-controlled oscillating unit, a source of the second MOS transistor of each branch adjusting circuit is grounded, a gate of the first MOS transistor of each branch adjusting circuit is electrically connected to the digital logic control unit, and the digital logic control unit controls on and off of the first MOS transistor of the corresponding branch adjusting circuit according to the hierarchical control signal, where the output circuit includes a first inductor, a second inductor, and a third inductor, where the first inductor is coupled to the voltage-controlled oscillating unit, the second inductor is connected to the second inductor, and the third inductor is coupled to the other, and the first inductor is connected to the other end of the digital logic control unit.

In an embodiment of the present utility model, at least one MOS transistor in the excitation signal amplitude adjusting unit is replaced with a triode in a state that a drain, a gate, and a source of the MOS transistor are in one-to-one correspondence with a collector, a base, and an emitter of the triode.

According to another aspect of the present utility model, there is provided a microwave chip with an adjustable excitation signal amplitude, wherein the microwave chip with the adjustable excitation signal amplitude includes a feeding circuit with the adjustable excitation signal amplitude arranged in the form of an integrated circuit.

In an embodiment of the utility model, the microwave chip with adjustable excitation signal amplitude is further integrated with an intermediate frequency amplifying unit, wherein the intermediate frequency amplifying unit is configured to amplify a doppler intermediate frequency signal generated according to a frequency/phase difference between the excitation signal and the corresponding echo signal.

In an embodiment of the utility model, the digital logic control unit is electrically connected to the intermediate frequency amplifying unit, and controls the amplification factor of the intermediate frequency amplifying unit according to the received hierarchical control signal.

In an embodiment of the present utility model, the intermediate frequency amplifying unit includes an amplifier, an input resistor, a feedback resistor, a blocking capacitor, at least one branch input circuit connected in parallel to the input resistor and at least one branch feedback circuit connected in parallel to the feedback resistor, wherein one end of the input resistor is electrically connected to a negative input terminal of the amplifier, the other end of the input resistor is grounded via the blocking capacitor, one end of the feedback resistor is electrically connected to an output terminal of the amplifier, the other end of the feedback resistor is electrically connected to a negative input terminal of the amplifier, wherein each branch input circuit includes a branch input switching tube and a branch input resistor connected in series with the branch input switching tube, each branch feedback circuit includes a branch feedback switching tube and a branch feedback resistor connected in series with the branch feedback switching tube, wherein the branch input switching tube and the branch feedback switching tube are controlled by the digital logic control unit to be electrically connected to the digital logic control unit, wherein the digital logic control unit controls the corresponding branch switching tube and/or the feedback switching tube to turn-off/on/off the amplifier according to the corresponding branch switching control signal.

In an embodiment of the present utility model, the intermediate frequency amplifying unit includes an amplifier, an input resistor, a feedback resistor, a blocking capacitor, at least one branch input circuit connected in parallel to the input resistor and at least one branch feedback circuit connected in parallel to the feedback resistor, wherein one end of the input resistor is electrically connected to a negative input end of the amplifier, the other end of the input resistor is electrically connected to one end of the blocking capacitor, the other end of the blocking capacitor is connected to the doppler intermediate frequency signal, wherein a positive input end of the amplifier is connected to a reference voltage, one end of the feedback resistor is electrically connected to an output end of the amplifier, the other end of the feedback resistor is electrically connected to a negative input end of the amplifier, each branch input circuit includes a branch input switching tube and a branch feedback resistor connected in series with the branch input switching tube, wherein each branch feedback circuit includes a branch feedback switching tube and a branch feedback resistor connected in series with the branch feedback switching tube, wherein the branch switching tube and the branch switching tube are electrically connected to the corresponding digital control unit and the digital control amplifier, the feedback switching unit is electrically connected to the digital control unit and the digital control amplifier, the digital control unit is turned on/off, and the digital control unit is connected to the digital control amplifier.

In an embodiment of the present utility model, any one of the branch input switching transistor and the branch feedback switching transistor is configured as one of a MOS transistor and a triode.

In an embodiment of the present utility model, the microwave chip with adjustable excitation signal amplitude is further integrated with a mixing unit, where the mixing unit is electrically connected to the voltage-controlled oscillating unit and the intermediate frequency amplifying unit, so as to output the doppler intermediate frequency signal corresponding to the frequency/phase difference between the excitation signal and the corresponding echo signal based on frequency mixing detection.

In an embodiment of the utility model, the microwave chip with adjustable excitation signal amplitude is further integrated with an intermediate frequency signal adjusting unit, wherein the intermediate frequency signal adjusting unit is electrically connected to an input end of the intermediate frequency amplifying unit and is controlled by the digital logic control unit to be electrically connected to the digital logic control unit, and the digital logic control unit controls the transmission efficiency of the intermediate frequency signal adjusting unit when the doppler intermediate frequency signal is transmitted to the intermediate frequency amplifying unit according to the grading control signal.

In an embodiment of the utility model, the microwave chip with adjustable excitation signal amplitude is further integrated with an intermediate frequency signal adjusting unit, wherein the intermediate frequency signal adjusting unit is electrically connected to an output end of the intermediate frequency amplifying unit and is controlled by the digital logic control unit to be electrically connected to the digital logic control unit, and the digital logic control unit controls the intermediate frequency signal adjusting unit to transmit the transmission efficiency of the doppler intermediate frequency signal from the intermediate frequency amplifying unit according to the hierarchical control signal.

In an embodiment of the utility model, the microwave chip with adjustable excitation signal amplitude is further integrated with a signal processing unit, wherein the signal processing unit is electrically connected to the intermediate frequency amplifying unit and the digital logic control unit and is configured to extract the effective characteristics of the doppler intermediate frequency signal, wherein the digital logic control unit generates the control command for the corresponding electrical device based on the effective characteristics of the doppler intermediate frequency signal.

In an embodiment of the utility model, the microwave chip with adjustable excitation signal amplitude is further integrated with a radio frequency low noise adjustable amplifier, wherein the radio frequency low noise adjustable amplifier is disposed at an input end of the mixing unit and is electrically connected to the digital logic control unit under control of the digital logic control unit, and the digital logic control unit controls the amplification factor of the radio frequency low noise adjustable amplifier on the echo signal according to the hierarchical control signal.

In an embodiment of the present utility model, the microwave chip with adjustable excitation signal amplitude is integrated with a communication unit, wherein the communication unit is electrically connected to the digital logic control unit, so as to receive the corresponding hierarchical control signal and transmit the hierarchical control signal to the digital logic control unit.

In an embodiment of the present utility model, the microwave chip with adjustable excitation signal amplitude is integrated with an input identification unit, wherein the input identification unit is electrically connected to an external peripheral device and is electrically connected to the digital logic control unit, so as to detect a state of the peripheral device and transmit digital information corresponding to the state of the peripheral device to the digital logic control unit, and the digital logic control unit invokes a corresponding hierarchical control signal according to the digital information.

Further objects and advantages of the present utility model will become fully apparent from the following description and the accompanying drawings.

Drawings

FIG. 1 is a schematic block diagram of a microwave chip with an adjustable excitation signal amplitude according to an embodiment of the utility model.

Fig. 2A is a schematic diagram of a partial circuit structure of the microwave chip with adjustable excitation signal amplitude according to the above embodiment of the utility model.

Fig. 2B is a schematic diagram of a partial circuit structure of the microwave chip with adjustable excitation signal amplitude according to the above embodiment of the utility model.

Fig. 2C is a schematic diagram of a partial circuit structure of the microwave chip with adjustable excitation signal amplitude according to the above embodiment of the utility model.

Fig. 2D is a schematic diagram of a partial circuit structure of the microwave chip with adjustable excitation signal amplitude according to the above embodiment of the utility model.

Fig. 2E is a schematic diagram of a partial circuit structure of the microwave chip with adjustable excitation signal amplitude according to the above embodiment of the utility model.

Fig. 3 is a schematic block diagram of a variant embodiment of the microwave chip with adjustable excitation signal amplitude according to the above embodiment of the present utility model.

Fig. 4 is a schematic block diagram of a variant embodiment of the microwave chip with adjustable excitation signal amplitude according to the above embodiment of the present utility model.

Fig. 5A is a schematic block diagram of a modified embodiment of the microwave chip with adjustable excitation signal amplitude according to the above embodiment of the utility model.

Fig. 5B is a schematic block diagram of a modified embodiment of the microwave chip with adjustable excitation signal amplitude according to the above embodiment of the utility model.

Fig. 6A is a schematic block diagram of a modified embodiment of the microwave chip with adjustable excitation signal amplitude according to the above embodiment of the utility model.

Fig. 6B is a schematic diagram of a partial circuit structure of the microwave chip with adjustable excitation signal amplitude according to fig. 6A.

Fig. 6C is a schematic diagram of a partial circuit structure of the microwave chip with adjustable excitation signal amplitude according to fig. 6A.

Fig. 7 is a schematic block diagram of a modified embodiment of the microwave chip with adjustable excitation signal amplitude according to the above embodiment of the utility model.

Fig. 8 is a schematic block diagram of a variant embodiment of the microwave chip with adjustable excitation signal amplitude according to the above embodiment of the present utility model.

Fig. 9 is a schematic block diagram of a modified embodiment of the microwave chip with adjustable excitation signal amplitude according to the above embodiment of the utility model.

Detailed Description

The following description is presented to enable one of ordinary skill in the art to make and use the utility model. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the utility model 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 utility model.

It will be appreciated by those skilled in the art that in the present disclosure, the terms "vertical," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present utility model.

It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1 of the drawings, a block diagram of an excitation signal amplitude-adjustable feeding circuit 10 according to an embodiment of the present utility model is illustrated, wherein the excitation signal amplitude-adjustable feeding circuit 10 includes a digital logic control unit 12, a voltage-controlled oscillation unit 13, and an excitation signal amplitude adjustment unit 14, wherein the voltage-controlled oscillation unit 13 is electrically connected to the digital logic control unit 12 and the excitation signal amplitude adjustment unit 14 to output an excitation signal with a corresponding frequency to the excitation signal amplitude adjustment unit 14 under the control of the digital logic control unit 12, and the digital logic control unit 12 is electrically connected to the excitation signal amplitude adjustment unit 14 and is configured to access a corresponding hierarchical control signal and control the excitation signal amplitude adjustment unit 14 to adjust an effective amplitude of the excitation signal according to the accessed hierarchical control signal, so that the effective amplitude of the excitation signal processed by the excitation signal amplitude adjustment unit 14 can satisfy the hierarchical control signal setting.

Preferably, in these embodiments of the present utility model, the feeding circuit 10 with adjustable excitation signal amplitude is configured as an integrated circuit, and in the state that the feeding circuit with adjustable excitation signal amplitude is configured as the microwave chip with adjustable excitation signal amplitude, the hierarchical control signal is received by a communication unit 11 from the outside, wherein the communication unit 11 is integrated into the microwave chip with adjustable excitation signal amplitude and is electrically connected to the digital logic control unit 12 to receive the corresponding hierarchical control signal from the outside and transmit to the digital logic control unit 12.

In detail, for further understanding of the present utility model, referring to the drawings in the specification of the present utility model to fig. 2A to 2E, different circuit configurations of the excitation signal amplitude adjusting unit 14 of the microwave chip with the adjustable excitation signal amplitude are respectively illustrated. In this embodiment, the excitation signal amplitude adjusting unit 14 includes at least two branch adjusting circuits 141, where each branch adjusting circuit 141 includes a first MOS tube 1411 and a second MOS tube 1412, where the source of the first MOS tube 1411 of the same branch adjusting circuit 141 is electrically connected to the drain of the second MOS tube 1412, where the gate of the second MOS tube 1412 of each branch adjusting circuit 141 is electrically connected to the voltage-controlled oscillating unit 13, where the source of the second MOS tube 1412 of each branch adjusting circuit 141 is grounded, where the drain of the first MOS tube 1411 of each branch adjusting circuit 141 is connected to the positive electrode of the power supply via a resistor/inductor 144, and where the gate of the first MOS tube 1411 of each branch adjusting circuit 141 is electrically connected to the digital logic control unit 12, so as to maintain the state of the structure of the microwave chip with adjustable excitation signal amplitude at the voltage-controlled oscillating unit, based on the structure of the excitation signal amplitude adjusting unit 14, and to realize the stage-by-pass control of the voltage-controlled oscillating unit at the frequency of the corresponding to the first MOS tube 1411, and to realize stage-pass control of the output of the excitation signal amplitude adjusting circuit 141 from the first MOS tube 1411 to the output stage-type adjusting unit.

Corresponding to fig. 2B, the excitation signal amplitude adjusting unit 14 includes at least two branch adjusting circuits 141, wherein each branch adjusting circuit 141 includes a branch MOS tube 1411 and a branch resistor/inductor 1412, wherein one end of the branch resistor/inductor 1412 of the same branch adjusting circuit 141 is electrically connected to the drain of the branch MOS tube 1411, wherein the other end of the branch resistor/inductor 1412 of each branch adjusting circuit 141 is electrically connected to the voltage-controlled oscillating unit 13 and is connected to the positive electrode of the power supply via a resistor/capacitor 144, the source electrode of the branch MOS tube 1411 of each branch adjusting circuit 141 is grounded, the gate electrode of the branch MOS tube 1411 of each branch adjusting circuit 141 is electrically connected to the digital logic control unit 12, so that the digital logic control unit 12 is connected to the digital logic control unit 12 in the aforementioned structural state of the microwave chip with adjustable excitation signal amplitude, based on the circuit structure of the excitation signal amplitude adjusting unit 14, in the state of maintaining the operating frequency and impedance independence of the voltage-controlled oscillating unit 13, the digital logic control unit 12 is connected to the source electrode of the branch MOS tube 1411 in a graded control signal, thereby realizing the output of the excitation signal from the branch adjusting unit 141 to the output stage of the output of the excitation signal with high frequency.

Corresponding to fig. 2C, the excitation signal amplitude adjusting unit 14 includes at least two branch adjusting circuits 141, where each branch adjusting circuit 141 includes a first MOS tube 1411, a second MOS tube 1412 and a branch resistor/inductor 1413, where the source of the first MOS tube 1411 of the same branch adjusting circuit 141 is electrically connected to the drain of the second MOS tube 1412, the drain of the first MOS tube 1411 of the same branch adjusting circuit 141 is connected to the positive electrode of the power supply via the branch resistor/inductor 1413, the gate of the second MOS tube 1412 of each branch adjusting circuit 141 is electrically connected to the voltage-controlled oscillating unit 13, the source of the second MOS tube 1412 of each branch adjusting circuit 141 is grounded via a resistor/inductor 144, the gate of the first MOS tube 1411 of each branch adjusting circuit 141 is electrically connected to the digital logic control unit 12, so that the voltage-controlled signal adjustable microwave chip is in the aforementioned structural state, the amplitude of the excitation signal is controlled by the voltage-controlled oscillating unit 14, and the amplitude of the excitation signal is controlled by the corresponding digital logic control unit 12 in a mode, and the amplitude of the output signal is controlled by the branch adjusting unit 13 in a stage-by stage, and the output of the voltage-controlled signal is controlled by the output of the voltage-controlled oscillating unit.

Corresponding to fig. 2D, the excitation signal amplitude adjusting unit 14 includes at least two branch adjusting circuits 141, wherein each branch adjusting circuit includes a branch resistor/inductor 1413, a first MOS transistor 1411 and at least two transistors 1412, wherein each transistor 1412 of the same branch adjusting circuit 141 is disposed in parallel, a source of the first MOS transistor 1411 of the same branch adjusting circuit 141 is electrically connected to a collector of the transistor 1412, a drain of the first MOS transistor 1411 of the same branch adjusting circuit 141 is connected to a power supply positive electrode via the branch resistor/inductor 1413, a base of the transistor 1412 of each branch adjusting circuit 141 is electrically connected to the voltage-controlled oscillating unit 13, an emitter of the transistor 1412 of each branch adjusting circuit 141 is grounded, the gate of the first MOS transistor 1411 of each branch adjusting circuit 141 is electrically connected to the digital logic control unit 12, so that in the aforementioned structural state of the microwave chip with adjustable excitation signal amplitude, based on the circuit structure of the excitation signal amplitude adjusting unit 14, in a state of maintaining the independence of the operating frequency and the impedance of the voltage-controlled oscillating unit 13, the digital logic control unit 12 controls the on and off of the first MOS transistor 1411 of the corresponding branch adjusting circuit 141 according to the hierarchical control signal, thereby realizing the hierarchical selection of the effective amplitude of the excitation signal output by the voltage-controlled oscillating unit 13 in the form of a high-frequency integrated circuit, wherein the output end of the excitation signal amplitude adjusting unit 14 is led out from the drain of the first MOS transistor 1411 of each branch adjusting circuit 141, and is worth mentioning that based on the drain, gate, source, collector, and transistor of the MOS transistor, the transistor 1412 can be replaced with a MOS transistor in this embodiment, with a one-to-one correspondence of base and emitter.

Corresponding to fig. 2E, the excitation signal amplitude adjusting unit 14 includes at least two branch adjusting circuits 141 and an output circuit 142, where each branch adjusting circuit 141 includes a first MOS transistor 1411, a second MOS transistor 1412 and an inductor 1414, where the drain of the first MOS transistor 1411 of the same branch adjusting circuit 141 is connected to the positive electrode of the power supply through the inductor 1414, the source of the first MOS transistor 1411 of the same branch adjusting circuit 141 is electrically connected to the drain of the second MOS transistor 1412, the gate of the second MOS transistor 1412 of each branch adjusting circuit 141 is electrically connected to the voltage-controlled oscillating unit 13, the source of the second MOS transistor 1412 of each branch adjusting circuit 141 is grounded, the gate of the first MOS transistor 1411 of each branch adjusting circuit 141 is electrically connected to the digital logic control unit 12, thus, in the above-mentioned structural state of the microwave chip with adjustable excitation signal amplitude, based on the above-mentioned circuit structure of the excitation signal amplitude adjusting unit 14, in a state of maintaining the independence of the operating frequency and the impedance of the voltage-controlled oscillating unit 13, the digital logic control unit 12 controls the on and off of the first MOS transistor 1411 of the corresponding branch adjusting circuit 141 according to the hierarchical control signal, thereby realizing the hierarchical selection of the effective amplitude of the excitation signal outputted by the voltage-controlled oscillating unit 13 in the form of a high-frequency integrated circuit, wherein the output circuit 142 comprises a first inductor 1421, a second inductor 1422 and a third inductor 1423, wherein the first inductor 1421 is coupled to the inductors 1414 of the branch adjusting circuits 141, wherein the second inductor 1422 is connected in parallel to the first inductor 1421, wherein the second inductor 1422 is mutually coupled with the third inductor 1423, wherein one end of the third inductor 1423 is grounded, and the output end of the excitation signal amplitude adjustment unit 14 is led out from the other end of the third inductor 1423.

In particular, based on the one-to-one correspondence between the drain, the gate, and the source of the MOS transistor and the collector, the base, and the emitter of the triode, in each circuit structure of the excitation signal amplitude adjusting unit 14 described above, at least one MOS transistor in the excitation signal amplitude adjusting unit 14 can be replaced with a triode.

It should be noted that, based on the above-mentioned structural configuration of the microwave chip with adjustable excitation signal amplitude, the on-off switching of the branch adjusting circuit 141 of the excitation signal amplitude adjusting unit 14 implements the step selection of the effective amplitude of the excitation signal output by the voltage-controlled oscillating unit 13 in the form of a high-frequency integrated circuit, which does not change the frequency of the excitation signal output by the voltage-controlled oscillating unit 13, nor affect the impedance matching between the microwave chip with adjustable excitation signal amplitude and the corresponding antenna unit, i.e. the connection relationship between the excitation signal amplitude adjusting unit 14 and the voltage-controlled oscillating unit 13 can maintain the independence of the operating frequency of the voltage-controlled oscillating unit 13, and does not affect the impedance independence of the microwave chip with adjustable excitation signal amplitude, so that the method is suitable for microwave detection based on the doppler effect principle.

It should be further noted that, the connection relationship between the excitation signal amplitude adjusting unit 14 and the voltage-controlled oscillating unit 13 can maintain the independence of the working frequency of the voltage-controlled oscillating unit 13, so that the setting of the excitation signal amplitude adjusting unit 14 does not change the output efficiency of the voltage-controlled oscillating unit 13 for outputting the excitation signal, so that the effective amplitude of the excitation signal can be selected in a grading manner based on the setting of the excitation signal amplitude adjusting unit 14, thereby adjusting the radiation power consumption of the corresponding microwave detection device with the same output efficiency, so that the overall power consumption of the corresponding microwave detection device is reduced in a state that the actual detection space of the corresponding microwave detection device is matched with the target detection space based on the condition of the effective amplitude of the excitation signal.

Further, for the purpose of improving the circuit integration level of the corresponding microwave probe device based on enriching the functions of the microwave chip with adjustable excitation signal amplitude, wherein the microwave chip with adjustable excitation signal amplitude can be further integrated with other circuit functional modules of the microwave probe device, referring specifically to fig. 3, a block diagram of a variant embodiment of the microwave chip with adjustable excitation signal amplitude is illustrated, wherein the microwave chip with adjustable excitation signal amplitude is further integrated with an intermediate frequency amplifying unit 15, wherein in a state that the microwave chip with adjustable excitation signal amplitude is applied to the corresponding microwave probe device, the excitation signal amplitude adjusting unit 14 is feed-connected to the corresponding antenna unit to output the excitation signal to feed the antenna unit, wherein the antenna unit emits a microwave beam corresponding to the frequency of the excitation signal in a fed state to form the actual detection space, and receives a reflected echo formed by the reflection of the microwave beam by a corresponding object in the actual detection space to transmit an echo signal corresponding to the reflected echo to the mixing unit, the corresponding mixing unit is electrically connected to the voltage controlled oscillating unit 13, the mixing unit outputs a Doppler intermediate frequency signal corresponding to the frequency/phase difference between the excitation signal and the echo signal, wherein the intermediate frequency amplifying unit 15 is electrically connected to the mixing unit to amplify the Doppler intermediate frequency signal, the intermediate frequency amplifying unit is integrated with the microwave chip with the adjustable excitation signal amplitude to enrich the functions of the microwave chip with the adjustable excitation signal amplitude, the circuit integration level of the microwave detection device is improved.

It is to be understood that the antenna unit is allowed to be provided in a transceiving form, and is electrically connected to the mixing unit in correspondence with the state in which the antenna unit is fed to the excitation signal amplitude adjusting unit 14, so as to transmit the microwave beam in a state in which the antenna unit is fed by the excitation signal output from the excitation signal amplitude adjusting unit 14 as a transmitting antenna, and to transmit the echo signal corresponding to the reflected echo to the mixing unit in correspondence with the reflected echo formed by the reflection of the microwave beam by the corresponding object in the real detection space as a receiving antenna. Wherein the antenna unit is also allowed to be disposed in a transceiving separated form, and is electrically connected to the mixing unit while being electrically connected to the excitation signal amplitude adjusting unit 14 in correspondence with the antenna unit, wherein the antenna unit is distinguished from the antenna unit having a single feeding point and being electrically connected to the excitation signal amplitude adjusting unit 14 and being electrically connected to the mixing unit in a transceiving combined form in which the antenna unit has a transmitting feeding point being electrically connected to the excitation signal amplitude adjusting unit 14 and a receiving feeding point being electrically connected to the mixing unit, so as to be fed with the excitation signal outputted from the excitation signal amplitude adjusting unit 14 at the transmitting feeding point, and transmits the echo signal corresponding to the reflected echo to the mixing unit at the receiving feeding point.

With further reference to fig. 4 of the drawings in the specification of the present utility model, the microwave chip 10 with adjustable excitation signal amplitude further integrates the mixing unit 16, so as to further improve the circuit integration level of the microwave detection device and enrich the functions of the microwave chip with adjustable excitation signal amplitude.

Further, the microwave chip with adjustable excitation signal amplitude can be further combined to adjust the sensitivity of the microwave detection device on the basis of adjusting the effective amplitude of the excitation signal, and referring to fig. 5A to 5B, wherein the microwave chip with adjustable excitation signal amplitude is further integrated with an intermediate frequency signal adjusting unit 17, and the intermediate frequency signal adjusting unit 17 is electrically connected to the digital logic control unit 12 and the intermediate frequency amplifying unit 15, so that the digital logic control unit 12 adjusts the amplitude of the doppler intermediate frequency signal under the control of the hierarchical control signal, thereby forming a sensitivity setting of the microwave detection device, and further enriching the functions of the microwave chip with adjustable excitation signal amplitude.

Corresponding to fig. 5A, the intermediate frequency signal adjusting unit 17 is disposed between the mixing unit 16 and the intermediate frequency amplifying unit 15, that is, the intermediate frequency signal adjusting unit 17 is electrically connected to the input end of the intermediate frequency amplifying unit 15 and is controlled by the digital logic control unit 12 to be electrically connected to the digital logic control unit 12, wherein the digital logic control unit 12 controls the transmission efficiency of the intermediate frequency signal adjusting unit 17 when the doppler intermediate frequency signal is transmitted from the mixing unit 16 to the intermediate frequency signal adjusting unit 17 according to the hierarchical control signal.

Corresponding to fig. 5B, the intermediate frequency signal adjusting unit 17 is electrically connected to the output end of the intermediate frequency amplifying unit 15 and is controlled by the digital logic control unit 12 to be electrically connected to the digital logic control unit 12, wherein the digital logic control unit 12 controls the transmission efficiency of the doppler intermediate frequency signal from the intermediate frequency amplifying unit 15 by the intermediate frequency signal adjusting unit 17 according to the hierarchical control signal.

It is to be understood that the understanding of the transmission efficiency of the intermediate frequency signal adjusting unit 17 to transmit the doppler intermediate frequency signal from the mixing unit 16 to the intermediate frequency amplifying unit 15 should include the output efficiency of the mixing unit 16 to output the doppler intermediate frequency signal and the transmission efficiency of the doppler intermediate frequency signal to be transmitted to the intermediate frequency amplifying unit 15, and the understanding of the transmission efficiency of the doppler intermediate frequency signal to be transmitted from the intermediate frequency amplifying unit 15 should include the output efficiency of the intermediate frequency amplifying unit 15 to output the doppler intermediate frequency signal and the transmission efficiency of the doppler intermediate frequency signal on the way of being transmitted, corresponding to the state in which the intermediate frequency signal adjusting unit 17 is provided at the output end of the intermediate frequency amplifying unit 15.

It should be noted that in the modified embodiments illustrated in fig. 5A and 5B, the mixing unit 16 is integrated into the microwave chip with adjustable excitation signal amplitude, but it will be understood by those skilled in the art that the embodiment of the present utility model is merely illustrative, and does not represent that the mixing unit 16 must be integrated at the same time when the microwave chip with adjustable excitation signal amplitude is integrated with the intermediate frequency signal adjusting unit 17, in other words, the mixing unit is allowed to be set in a state separate from the microwave chip with adjustable excitation signal amplitude when the microwave chip with adjustable excitation signal amplitude is integrated with the intermediate frequency signal adjusting unit 17.

In particular, referring to fig. 6A to 6C of drawings of the specification of the present utility model, the digital logic control unit 12 is electrically connected to the intermediate frequency amplifying unit 15, and equivalently forms a sensitivity setting for the microwave detecting device according to the received hierarchical control signal controlling the amplification factor of the intermediate frequency amplifying unit 15.

Referring specifically to fig. 6B, the intermediate frequency amplifying unit 15 includes an amplifier 151, an input resistor 152, a feedback resistor 153, a blocking capacitor 154, at least one branch input circuit 155 connected in parallel to the input resistor 152 and at least one branch feedback circuit 156 connected in parallel to the feedback resistor 153, wherein one end of the input resistor 152 is electrically connected to the negative input terminal of the amplifier 151, the other end of the input resistor 152 is grounded via the blocking capacitor 154, wherein one end of the feedback resistor 153 is electrically connected to the output terminal of the amplifier 151, the other end of the feedback resistor 153 is electrically connected to the negative input terminal of the amplifier 151, each branch input circuit 155 includes a branch input switching tube 1551 and a branch feedback resistor 1552 connected in series with the branch input switching tube 1551, each branch feedback circuit 156 includes a branch feedback switching tube 1561 and a branch feedback resistor 1562 connected in series with the branch feedback switching tube 1561, wherein the branch input switching tube 1551 and the branch feedback switching tube 1561 are electrically connected to the corresponding digital control unit and the amplifier-controlled by the corresponding digital control unit and the amplifier-controlled by the feedback switching unit 551, the digital control unit and the corresponding to the digital control unit and the amplifier-controlled by the feedback switching unit 551.

Corresponding to fig. 6C, the intermediate frequency amplifying unit 15 comprises an amplifier 151, an input resistor 152, a feedback resistor 153, a blocking capacitor 154, at least one branch input circuit 155 connected in parallel to the input resistor 152 and at least one branch feedback circuit 156 connected in parallel to the feedback resistor 153, wherein one end of the input resistor 152 is electrically connected to the negative input terminal of the amplifier 151, the other end of the input resistor 152 is electrically connected to one end of the blocking capacitor 154, the other end of the blocking capacitor 154 is connected to the doppler intermediate frequency signal, wherein the positive input terminal of the amplifier 151 is connected to a reference voltage, one end of the feedback resistor 153 is electrically connected to the output terminal of the amplifier 151, the other end of the feedback resistor 153 is electrically connected to the negative input terminal of the amplifier 151, each branch input circuit 155 comprises a branch input switch 1551 and a branch input resistor 1552 connected in series with the branch input switch 1551, wherein each branch feedback circuit 156 comprises a branch switch 1561 and a feedback switch-off control unit 1561 and a digital control unit 15612 connected to the corresponding branch switch-off control unit 1561 and the corresponding to the branch switch-off control unit 15612 and the amplifier-off control unit.

It should be noted that, the branch input switch 1551 and/or the branch feedback switch 1561 of the intermediate frequency amplifying unit 15 may be implemented as a MOS transistor or a triode, which is not limited by the present utility model.

In particular, referring to fig. 7 of the drawings, in this embodiment of the present utility model, the microwave chip with adjustable excitation signal amplitude is further integrated with a rf low-noise adjustable amplifier 17A, wherein the rf low-noise adjustable amplifier 17A is disposed at the input end of the mixing unit 16 and is electrically connected to the digital logic control unit 12 under the control of the digital logic control unit 12, and the digital logic control unit 12 controls the amplification ratio of the rf low-noise adjustable amplifier 17A to the echo signal according to the hierarchical control signal, so as to equivalently form a sensitivity setting for the microwave detection device.

In particular, referring to fig. 8 of the drawings of the present specification, the digital logic control unit 12 receives external corresponding gradation control signals by means of the communication unit 11, in this variant embodiment, a microwave chip in which the amplitude of the excitation signal is adjustable is integrated with an input recognition unit 11A, wherein the input recognition unit 11A is electrically connected to external peripheral devices and is electrically connected to the digital logic control unit 12 to detect the state of the peripheral devices and transmit digital information corresponding to the state of the peripheral devices to the digital logic control unit 12, wherein the digital logic control unit 12 retrieves corresponding gradation control signals according to the digital information, and further controls the excitation signal amplitude adjustment unit 14 and/or the intermediate frequency signal adjustment unit 17 or the radio frequency low noise adjustable amplifier 17A according to the retrieved gradation control signals.

It should be noted that, in this embodiment of the present utility model, the external peripheral device to which the input identification unit 11A is electrically connected may be configured as a mechanical switch device, a digital signal receiving device, or an analog adjusting device, so as to be used as a man-machine interaction perforation of the microwave detection device, and the user may adjust the effective amplitude of the excitation signal output by the voltage-controlled oscillating unit 13 in the form of a high-frequency device by directly or indirectly operating the peripheral device, where the specific form of the peripheral device does not form a limitation of the present utility model, and the mechanical switch device includes a dial switch, a rotary multi-gear switch, a dial switch, a code switch, etc., and the digital signal receiving device includes a wireless RF module, such as a bluetooth, mesh, wiFi, zigbe, loRa, 868 radio frequency module, 915 radio frequency module 433, radio frequency module, etc., an infrared receiving module, and also includes a wired digital module, DALI, KNX, PLC, a CAN BUS, RS485, RS232, etc., and an NFC module; wherein the analog adjustment device may be an adjustable potentiometer.

It will also be appreciated that in the variant embodiment illustrated in fig. 8, the mixing unit 16 is integrated in the microwave chip with adjustable excitation signal amplitude, but it will be understood by those skilled in the art that the embodiment of the present utility model is only illustrative and does not represent that the mixing unit 16 must be integrated at the same time when the microwave chip with adjustable excitation signal amplitude employs the input recognition unit 11A to detect the state of the peripheral device and thus the digital logic control unit 12 to retrieve the corresponding hierarchical control signal based on the digital information, in other words, the mixing unit is allowed to be set in a state separate from the microwave chip with adjustable excitation signal amplitude, which is not limited to this.

With further reference to fig. 9 of the drawings, the microwave chip with adjustable excitation signal amplitude is further integrated with a signal processing unit 18, wherein the signal processing unit 18 is electrically connected to the intermediate frequency amplifying unit 15 and the digital logic control unit 12 and is configured to be capable of extracting the effective characteristics of the doppler intermediate frequency signal, wherein the digital logic control unit 12 generates a control instruction for a corresponding electrical device based on the effective characteristics of the doppler intermediate frequency signal, and may send the control instruction to the electrical device, so as to implement an intelligent response of the corresponding electrical device to the corresponding action according to the effective characteristics of the doppler intermediate frequency signal to the characterization of the corresponding action of the person (object).

In particular, when the signal processing unit 18 is integrated with the microwave chip with the adjustable amplitude of the excitation signal, the sensitivity adjustment of the microwave detection device may be achieved by integrating the intermediate frequency signal adjusting unit 17 or the radio frequency low noise adjustable amplifier 17A, or controlling the amplification factor of the intermediate frequency amplifying unit 15, or may be achieved by the digital logic control unit 12 setting the signal processing unit 18 according to the hierarchical control signal to extract the effective characteristic of the doppler intermediate frequency signal on the amplitude of the frequency spectrum, the energy spectrum, the power spectrum or the amplitude, which satisfies the sensitivity hierarchical setting, so that the sensitivity adjustment of the microwave detection device with the adjustable amplitude of the excitation signal is achieved based on the signal processing unit 18.

It should be noted that, in this embodiment, the microwave chip with adjustable excitation signal amplitude is further integrated with a low voltage linear regulator (corresponding to LDOs in the figure) and an oscillator (corresponding to OSC in the figure), wherein the low voltage linear regulator is electrically connected to the digital logic control unit 12, the voltage-controlled oscillation unit 13, the excitation signal amplitude adjusting unit 14 and the intermediate frequency amplifying unit 15 respectively, so that the digital logic control unit 12 is provided in a power supply state, the voltage-controlled oscillation unit 13, the excitation signal amplitude adjusting unit 14 and the intermediate frequency amplifying unit 15 provide a constant voltage, and the low voltage linear regulator is also electrically connected to the signal processing unit 18, so that the signal processing unit 18 is provided with a constant voltage in a power supply state, wherein the oscillator is electrically connected to the digital logic control unit 12 and is configured to provide a digital logic control unit 12 with a constant voltage, and the oscillator is configured to be integrated in a clock circuit in particular in the digital logic control unit 12, when the microwave chip with adjustable excitation signal amplitude is integrated with the signal processing unit 18.

It will be appreciated that in the embodiment illustrated in fig. 9, when the input recognition unit 11A is used by the microwave chip with adjustable excitation signal amplitude to detect the state of the peripheral device and further call the corresponding hierarchical control signal based on the digital logic control unit 12 according to the digital information, it will be understood by those skilled in the art that embodiments of the present utility model are merely illustrative, and in some embodiments, when the microwave chip with adjustable excitation signal amplitude is further integrated with the signal processing unit 18 and/or the output control unit 19 and/or the low voltage linear voltage regulator and/or the oscillator, the microwave chip with adjustable excitation signal amplitude may also be used by the communication unit 11 to receive the external corresponding hierarchical control signal, which is not limited by the present utility model, while when the microwave chip with adjustable excitation signal amplitude is further integrated with the signal processing unit 18 and/or the output control unit 19 and/or the low voltage linear voltage regulator and/or the oscillator, the frequency mixing unit 16 may also be used by the microwave chip with adjustable excitation signal with different amplitude.

Those skilled in the art will appreciate that the embodiments of the utility model described above and shown in the drawings are by way of example only and not limiting. The objects of the present utility model have been fully and effectively achieved. The functional and structural principles of the present utility model have been shown and described in the examples and embodiments of the utility model may be modified or practiced without departing from the principles described.

Claims

1. A feed circuit with an adjustable excitation signal amplitude, comprising:

a digital logic control unit;

2. The adjustable feed circuit of claim 1, wherein the excitation signal amplitude adjustment unit comprises at least two branch adjustment circuits, wherein each branch adjustment circuit comprises a first MOS transistor and a second MOS transistor, wherein sources of the first MOS transistors of the same branch adjustment circuit are electrically connected to drains of the second MOS transistors, wherein gates of the second MOS transistors of each branch adjustment circuit are electrically connected to the voltage-controlled oscillation unit, sources of the second MOS transistors of each branch adjustment circuit are grounded, drains of the first MOS transistors of each branch adjustment circuit are connected to a power supply positive electrode via a resistor/inductor, gates of the first MOS transistors of each branch adjustment circuit are electrically connected to the digital logic control unit, wherein the digital logic control unit controls on and off of the first MOS transistors of the corresponding branch adjustment circuit according to the hierarchical control signal, and wherein an output end of the excitation signal amplitude adjustment unit is led out from the drains of the first MOS transistors of the branch adjustment circuit.

3. The adjustable feed circuit of claim 1, wherein the excitation signal amplitude adjusting unit comprises at least two branch adjusting circuits, wherein each branch adjusting circuit comprises a branch resistor/inductor and a branch MOS transistor, wherein one end of the branch resistor/inductor of the same branch adjusting circuit is electrically connected to a drain of the branch MOS transistor, wherein the other end of the branch resistor/inductor of each branch adjusting circuit is electrically connected to the voltage-controlled oscillating unit and is connected to a power supply positive electrode via a resistor/inductor, a source electrode of the branch MOS transistor of each branch adjusting circuit is grounded, and a gate electrode of the branch MOS transistor of each branch adjusting circuit is electrically connected to the digital logic control unit, respectively, wherein the digital logic control unit controls on and off of the branch MOS transistor of the corresponding branch adjusting circuit according to the hierarchical control signal, wherein an output end of the excitation signal amplitude adjusting unit is led out from the other end of the branch resistor/inductor of each branch adjusting circuit.

4. The adjustable feed circuit of claim 1, wherein the excitation signal amplitude adjusting unit comprises at least two branch adjusting circuits, wherein each branch adjusting circuit comprises a branch resistor/inductor, a first MOS transistor and a second MOS transistor, wherein sources of the first MOS transistors of the same branch adjusting circuit are electrically connected to drains of the second MOS transistors, drains of the first MOS transistors of the same branch adjusting circuit are connected to a power supply positive electrode through the branch resistor/inductor, gates of the second MOS transistors of each branch adjusting circuit are electrically connected to the voltage-controlled oscillating unit, sources of the second MOS transistors of each branch adjusting circuit are grounded through a resistor/inductor, gates of the first MOS transistors of each branch adjusting circuit are electrically connected to the digital logic control unit, wherein the digital logic control unit controls on and off of the first MOS transistors of the corresponding branch adjusting circuit according to the hierarchical control signal, and wherein an output amplitude of the excitation signal adjusting unit is led out from the sources of the second MOS transistors of the branch adjusting circuit.

5. The adjustable feed circuit of claim 1, wherein the excitation signal amplitude adjusting unit comprises at least two branch adjusting circuits, wherein each branch adjusting circuit comprises a branch resistor/inductor, a first MOS tube and at least two second MOS tubes, wherein each second MOS tube of the same branch adjusting circuit is arranged in parallel, a source electrode of the first MOS tube of the same branch adjusting circuit is electrically connected to a drain electrode of the second MOS tube, a drain electrode of the first MOS tube of the same branch adjusting circuit is connected to a power supply positive electrode through the branch resistor/inductor, a gate electrode of the second MOS tube of each branch adjusting circuit is electrically connected to the voltage-controlled oscillating unit, a source electrode of the second MOS tube of each branch adjusting circuit is grounded, a gate electrode of the first MOS tube of each branch adjusting circuit is electrically connected to the digital logic control unit, wherein the digital logic control unit controls on and off of the first MOS tube of the corresponding branch adjusting circuit according to the classification control signal, and the amplitude of the output signal is led out from the drain electrode of the adjusting unit.

6. The adjustable feed circuit of claim 1, wherein the excitation signal amplitude adjustment unit comprises at least two branch adjustment circuits and an output circuit, wherein each branch adjustment circuit comprises a first MOS transistor, a second MOS transistor and an inductor, wherein the drain of the first MOS transistor of the same branch adjustment circuit is connected to the positive electrode of the power supply through the inductor, the source of the first MOS transistor of the same branch adjustment circuit is electrically connected to the drain of the second MOS transistor, the gate of the second MOS transistor of each branch adjustment circuit is electrically connected to the oscillation unit, the source of the second MOS transistor of each branch adjustment circuit is grounded, the gate of the first MOS transistor of each branch adjustment circuit is electrically connected to the digital logic control unit, wherein the digital logic control unit controls the turn-on and turn-off of the first MOS transistor of the corresponding branch adjustment circuit according to the classification control signal, wherein the output circuit comprises a first inductor, a second inductor and a third inductor, wherein the first inductor is coupled to the output of the third inductor from the other end of the first inductor and the second inductor, the gate of each branch adjustment circuit is electrically connected to the digital logic control unit, and the gate of the first inductor is coupled to the third inductor.

7. The feeding circuit according to any one of claims 2 to 6, wherein at least one MOS transistor in the excitation signal amplitude adjusting unit is replaced with a transistor in a state that a drain, a gate, and a source of the MOS transistor are in one-to-one correspondence with a collector, a base, and an emitter of the transistor.

8. A microwave chip with an adjustable excitation signal amplitude, characterized by comprising a feeding circuit with an adjustable excitation signal amplitude according to any one of claims 1 to 7 arranged in the form of an integrated circuit.

9. The microwave chip of claim 8, wherein the microwave chip of adjustable excitation signal amplitude is further integrated with an intermediate frequency amplification unit, wherein the intermediate frequency amplification unit is configured to amplify the doppler intermediate frequency signal when receiving a doppler intermediate frequency signal reflecting a frequency/phase difference between the excitation signal and the corresponding echo signal.

10. The microwave chip of claim 9, wherein the digital logic control unit is electrically connected to the intermediate frequency amplifying unit and controls the amplification factor of the intermediate frequency amplifying unit according to the received hierarchical control signal.

11. The microwave chip of claim 10, wherein the intermediate frequency amplifying unit comprises an amplifier, an input resistor, a feedback resistor, a blocking capacitor, at least one branch input circuit connected in parallel to the input resistor and at least one branch feedback circuit connected in parallel to the feedback resistor, wherein one end of the input resistor is electrically connected to the negative input terminal of the amplifier, the other end of the input resistor is grounded via the blocking capacitor, wherein one end of the feedback resistor is electrically connected to the output terminal of the amplifier, the other end of the feedback resistor is electrically connected to the negative input terminal of the amplifier, wherein each branch input circuit comprises a branch input switching tube and a branch input resistor connected in series with the branch input switching tube, wherein each branch feedback circuit comprises a branch feedback switching tube and a branch feedback resistor connected in series with the branch feedback switching tube, wherein the branch input switching tube and the branch feedback switching tube are controlled by the digital logic control unit to be electrically connected to the output terminal of the amplifier, wherein the pair of digital control logic control units are controlled by the digital control unit and the corresponding branch control units to the amplifier and/or the feedback switching unit are turned off and turned on/or turned off.

12. The microwave chip of claim 10, wherein the intermediate frequency amplifying unit comprises an amplifier, an input resistor, a feedback resistor, a blocking capacitor, at least one branch input circuit connected in parallel to the input resistor and at least one branch feedback circuit connected in parallel to the feedback resistor, wherein one end of the input resistor is electrically connected to the negative input terminal of the amplifier, the other end of the input resistor is electrically connected to one end of the blocking capacitor, the other end of the blocking capacitor is connected to the doppler intermediate frequency signal, wherein the positive input terminal of the amplifier is connected to a reference voltage, one end of the feedback resistor is electrically connected to the output terminal of the amplifier, the other end of the feedback resistor is electrically connected to the negative input terminal of the amplifier, each branch input circuit comprises a branch input switching tube and a branch input resistor connected in series with the branch input switching tube, each branch feedback circuit comprises a branch feedback switching tube and a branch feedback resistor connected in series with the branch feedback switching tube, wherein the branch switching tube and the branch switching tube are electrically connected to the corresponding digital control unit and the digital control amplifier, the feedback switching unit is connected to the digital control unit and the digital control amplifier, the digital control unit is connected to the digital control amplifier, the digital control amplifier is turned off or the digital control unit is connected to the digital control unit.

13. The excitation signal amplitude adjustable microwave chip according to claim 11 or 12, wherein any one of the branch input switching transistor and the branch feedback switching transistor is provided as one of a MOS transistor and a triode.

14. The microwave chip of claim 9, wherein the microwave chip of adjustable excitation signal amplitude is further integrated with a mixing unit, wherein the mixing unit is electrically connected to the voltage controlled oscillating unit and the intermediate frequency amplifying unit to output the doppler intermediate frequency signal corresponding to a frequency/phase difference between the excitation signal and the corresponding echo signal based on a mixing detection.

15. The microwave chip with adjustable excitation signal amplitude according to claim 9, wherein the microwave chip with adjustable excitation signal amplitude is further integrated with an intermediate frequency signal adjusting unit, wherein the intermediate frequency signal adjusting unit is electrically connected to an input end of the intermediate frequency amplifying unit and is controlled by the digital logic control unit to be electrically connected to the digital logic control unit, wherein the digital logic control unit controls the transmission efficiency of the intermediate frequency signal adjusting unit when the doppler intermediate frequency signal is transmitted to the intermediate frequency amplifying unit according to the hierarchical control signal.

16. The microwave chip with adjustable excitation signal amplitude according to claim 9, wherein the microwave chip with adjustable excitation signal amplitude is further integrated with an intermediate frequency signal adjusting unit, wherein the intermediate frequency signal adjusting unit is electrically connected to an output end of the intermediate frequency amplifying unit and is controlled by the digital logic control unit to be electrically connected to the digital logic control unit, wherein the digital logic control unit controls the transmission efficiency of the doppler intermediate frequency signal from the intermediate frequency amplifying unit by the intermediate frequency signal adjusting unit according to the hierarchical control signal.

17. The microwave chip of claim 14, wherein the microwave chip of adjustable excitation signal amplitude is further integrated with a radio frequency low noise adjustable amplifier, wherein the radio frequency low noise adjustable amplifier is disposed at an input end of the mixing unit and is electrically connected to the digital logic control unit under control of the digital logic control unit, wherein the digital logic control unit controls amplification ratio of the echo signal by the radio frequency low noise adjustable amplifier according to the hierarchical control signal.

18. The microwave chip of claim 9, further integrated with a signal processing unit, wherein the signal processing unit is electrically connected to the intermediate frequency amplifying unit and the digital logic control unit and configured to extract the effective characteristics of the doppler intermediate frequency signal, wherein the digital logic control unit generates control instructions for the corresponding electrical device based on the effective characteristics of the doppler intermediate frequency signal.

19. The microwave chip of claim 8, integrated with a communication unit, wherein the communication unit is electrically connected to the digital logic control unit to receive the hierarchical control signal and transmit the hierarchical control signal to the digital logic control unit.

20. The microwave chip of claim 8, integrated with an input recognition unit, wherein the input recognition unit is electrically connected to an external peripheral device and to the digital logic control unit to detect a state of the peripheral device and transmit digital information corresponding to the state of the peripheral device to the digital logic control unit, wherein the digital logic control unit invokes the corresponding hierarchical control signal according to the digital information.