WO2021051443A1 - 微波多普勒模块 - Google Patents

微波多普勒模块 Download PDF

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Publication number
WO2021051443A1
WO2021051443A1 PCT/CN2019/108377 CN2019108377W WO2021051443A1 WO 2021051443 A1 WO2021051443 A1 WO 2021051443A1 CN 2019108377 W CN2019108377 W CN 2019108377W WO 2021051443 A1 WO2021051443 A1 WO 2021051443A1
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equivalent
microwave
frequency
power supply
supply line
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PCT/CN2019/108377
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English (en)
French (fr)
Inventor
邹高迪
邹新
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深圳迈睿智能科技有限公司
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Publication of WO2021051443A1 publication Critical patent/WO2021051443A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0475—Circuits with means for limiting noise, interference or distortion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B15/00—Suppression or limitation of noise or interference
    • H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus

Definitions

  • the invention relates to a microwave Doppler module, in particular to a microwave Doppler module with harmonic suppression function.
  • radio technology including The microwave detection technology based on the Doppler effect principle, as an important hub for the connection between people and things, has unique advantages in behavior detection and existence detection technology. It can detect without infringing on people’s privacy. Active objects, such as human motion characteristics, movement characteristics, and micro-movement characteristics, and even human heartbeat and breathing characteristics, have broad application prospects.
  • microwave Doppler modules based on the Doppler effect principle must strictly abide by the corresponding international standards and meet the corresponding regional regulations during the process of being used.
  • ISM International Scientific Medical
  • ITU-R ITU Radiocommunication Sector, the Radiocommunication Bureau of the International Telecommunication Union
  • the frequency bands used in microwave Doppler modules based on the Doppler effect principle mainly include 2.4Ghz, 5.8Ghz, 10.525Ghz, 24.125Gh and other frequency bands, and microwave Doppler based on the principle of Doppler effect
  • the Le module must also meet the corresponding national and regional certification standards, such as the RED certification of the European Union and the FCC certification of the United States.
  • the certification of the corresponding microwave Doppler module based on the FCC certification standard of the United States includes the certification of the corresponding microwave Doppler module.
  • the limit standard of the harmonic radiation of the microwave Doppler module includes the certification of the corresponding microwave Doppler module.
  • the existing microwave Doppler module based on the principle of Doppler effect is powered by a direct current and generates a microwave excitation current with a corresponding fundamental frequency through an oscillating circuit.
  • a radiation source electrically coupled to the oscillating circuit is fed, so that the radiation source can interact with a reference ground spaced apart from the radiation source to emit a microwave beam corresponding to the frequency of the microwave excitation current.
  • the oscillating circuit serves as a non-linear load. When it is powered by a direct current, since the current flowing through the oscillating circuit and the voltage loaded on it are not in a linear relationship, a corresponding basis is inevitably generated in the microwave excitation current. Harmonics that are multiples of wave frequency.
  • the response of the radiation source and the reference ground to the harmonics of the microwave excitation current is suppressed and mainly responds to the microwave
  • the fundamental frequency of the excitation current radiates a microwave beam corresponding to the fundamental frequency of the microwave excitation current.
  • the circuit of the oscillation circuit is in a high impedance state and has a certain length under the action of the high-frequency microwave excitation current, the circuit of the oscillation circuit can be modulated by the microwave excitation current to radiate corresponding to the microwave
  • the microwaves of the excitation current frequency include stray microwaves corresponding to the harmonics of the microwave excitation current, especially the high-order harmonic radiation corresponding to the high-order harmonics of the microwave excitation current that is easy to modulate the corresponding line . Therefore, currently, the harmonic radiation of the corresponding microwave Doppler module is mainly suppressed by the idea and method of shielding the oscillating circuit.
  • a shielding space containing the oscillating circuit is formed by the reference ground and a shielding cover, thereby suppressing the radiation interference of stray microwaves generated by the oscillating circuit outside the shielding space.
  • the stray radiation of the existing microwave Doppler module is still serious, mainly the harmonic radiation corresponding to the fundamental frequency of the microwave excitation current and three times the fundamental frequency of the microwave excitation current.
  • Harmonic radiation of frequency, quintuple, quintuple, and ninth frequency although the energy of harmonic radiation after triple frequency will be sharply reduced, but the current mainstream frequency bands such as 2.4G and 5.8G
  • the harmonic radiation of the module it is still difficult to meet the requirements of the corresponding laws and regulations.
  • the current microwave Doppler module prepared by shielding the oscillating circuit is certified by the FCC. It is difficult to guarantee the pass rate under the limit standard for harmonic radiation, especially the limit standard for higher harmonic radiation in the FCC certification.
  • An object of the present invention is to provide a microwave Doppler module, in which the harmonic radiation of the microwave Doppler module can be effectively suppressed based on the idea and method of directly obstructing the generation of corresponding harmonic radiation.
  • An object of the present invention is to provide a microwave Doppler module, wherein by suppressing the conduction of harmonics in the excitation current of the microwave signal generated by a microwave signal generating circuit of the microwave Doppler module, the corresponding harmonic radiation is The generation is obstructed to help suppress the harmonic radiation of the microwave Doppler module.
  • An object of the present invention is to provide a microwave Doppler module, in which, based on the idea and method of directly obstructing the generation of corresponding harmonic radiation, it breaks through the current generation of corresponding harmonics based on shielding the microwave signal generating circuit.
  • the general idea and way of consuming wave radiation is to increase the optionality of suppressing the harmonic radiation of the microwave Doppler module, which is conducive to improving the performance of the microwave Doppler based on the combination of different ideas and methods.
  • the suppression effect of the harmonic radiation of the Le module is to provide a microwave Doppler module, in which, based on the idea and method of directly obstructing the generation of corresponding harmonic radiation, it breaks through the current generation of corresponding harmonics based on shielding the microwave signal generating circuit.
  • the general idea and way of consuming wave radiation is to increase the optionality of suppressing the harmonic radiation of the microwave Doppler module, which is conducive to improving the performance of the microwave Doppler based on the combination of different ideas and methods.
  • An object of the present invention is to provide a microwave Doppler module, in which harmonics in the excitation current of the microwave signal generated by the microwave signal generating circuit are suppressed to be electrically connected or electrically coupled to the microwave signal generating circuit.
  • the modulation effect of the harmonics in the microwave signal excitation current generated by the microwave signal generating circuit on the corresponding circuit electrically connected or electrically coupled with the microwave signal generating circuit is limited, that is, the corresponding The generation of harmonic radiation is hindered to help suppress the harmonic radiation of the microwave Doppler module.
  • An object of the present invention is to provide a microwave Doppler module, in which harmonics in the excitation current of the microwave signal generated by the microwave signal generating circuit are suppressed to be electrically connected or electrically coupled to the microwave signal generating circuit.
  • the conduction of the corresponding lines is particularly beneficial to limit the modulation effect of higher harmonics in the microwave signal excitation current generated by the microwave signal generating circuit on the corresponding lines that are electrically connected or electrically coupled to the microwave signal generating circuit. That is to say, the generation of corresponding high-order harmonic radiation can be effectively hindered to help suppress the high-order harmonic radiation of the microwave Doppler module.
  • An object of the present invention is to provide a microwave Doppler module, wherein the microwave Doppler module includes at least one high-frequency equivalent capacitor, wherein the high-frequency equivalent capacitor is electrically connected to the microwave signal generating circuit,
  • the resonant characteristics of the high-frequency equivalent capacitor under the action of the high-frequency electrical signal suppress the conduction of the harmonics in the excitation current of the microwave signal to the corresponding line electrically connected or electrically coupled with the microwave signal generating circuit.
  • An object of the present invention is to provide a microwave Doppler module, in which the high-frequency equivalent capacitors with different capacitance capacities are selected to correspondingly suppress the corresponding times of the harmonics in the excitation current of the microwave signal and the electrical properties of the microwave signal generating circuit.
  • the conduction of the connected or electrically coupled line, the corresponding multiple of the harmonics in the microwave signal excitation current generated by the microwave signal generating circuit is connected to the corresponding line electrically connected or electrically coupled to the microwave signal generating circuit.
  • the modulation effect is limited, that is, the generation of corresponding times of harmonic radiation is hindered, which is beneficial to suppress the harmonic radiation of the microwave Doppler module.
  • An object of the present invention is to provide a microwave Doppler module, in which a plurality of said high-frequency equivalent capacitors are arranged in parallel to suppress the occurrence of multiple corresponding multiples of harmonics in the excitation current of the microwave signal and the microwave signal.
  • the conduction of the corresponding circuits that are electrically connected or electrically coupled, that is, the generation of multiple corresponding times of harmonic radiation can be hindered, which is beneficial to suppress the harmonic radiation of the microwave Doppler module.
  • An object of the present invention is to provide a microwave Doppler module, wherein the microwave Doppler module includes at least one equivalent inductance, so that at least one stage is formed by the equivalent inductance and the high frequency equivalent capacitance.
  • the LC filter network has a filtering effect on the corresponding harmonics in the microwave signal excitation current, and suppresses the conduction of the harmonics in the microwave signal excitation current to the corresponding lines that are electrically connected or electrically coupled with the microwave signal generating circuit.
  • An object of the present invention is to provide a microwave Doppler module in which the generation of corresponding harmonic radiation is hindered and the harmonic radiation is reduced, so that the corresponding harmonic radiation that has already been generated can be combined with the current shielded space.
  • the general ideas and methods of consumption suppress the harmonic radiation of the microwave Doppler module, it is beneficial to reduce the self-excited interference caused by the reflection of the harmonic radiation in the shielded space, thereby improving the performance of the microwave Doppler module. stability.
  • An object of the present invention is to provide a microwave Doppler module, which is based on the idea and method of directly obstructing the generation of the corresponding harmonic radiation, and combining the current generation of the corresponding harmonic radiation in the shielded space to consume the corresponding harmonic radiation.
  • the general ideas and methods of shielding the microwave signal generating circuit and consuming the corresponding harmonic radiation that has been generated are ignored, because the harmonics in the excitation current of the microwave signal affect the microwave signal
  • the harmonic radiation generated by the modulation of the power supply line and the signal transmission line that penetrates the shielded space and has a certain length of the generating circuit can be further suppressed.
  • An object of the present invention is to provide a microwave Doppler module, in which the high-frequency equivalent capacitor is arranged in the shielded space to suppress the harmonics in the excitation current of the microwave signal from being transmitted to the outside of the shielded space.
  • Conduction of the corresponding lines that are electrically connected or electrically coupled to the microwave signal generating circuit, thereby restricting the harmonics in the microwave signal excitation current to be electrically connected or electrically coupled to the microwave signal generating circuit outside the shielded space The modulation effect of the corresponding line.
  • An object of the present invention is to provide a microwave Doppler module, which is based on the idea and method of directly obstructing the generation of the corresponding harmonic radiation, and combining the current generation of the corresponding harmonic radiation in the shielded space to consume the corresponding harmonic radiation.
  • the general idea and method of the microwave Doppler module can meet the corresponding limit standards of harmonic radiation in the FCC certification, that is, the harmonic radiation gain of the microwave Doppler module is as low as it can be certified by the FCC certification standard. Anti-interference performance.
  • the present invention provides a microwave Doppler module, wherein the microwave Doppler module includes:
  • a microwave signal generating circuit wherein the microwave signal generating circuit has a power supply line and is set to allow the power supply line to be supplied by a direct current to generate a microwave signal excitation current of a corresponding frequency;
  • An antenna loop wherein the antenna loop is electrically coupled with the microwave signal generating circuit, and is configured to allow a microwave beam to be emitted in response to an excitation current of the microwave signal, and to receive the microwave beam formed by being reflected by at least one object Corresponding echo
  • a frequency mixing detection unit wherein the frequency mixing detection unit is electrically coupled to the microwave signal generating circuit and the antenna loop to output an excitation current corresponding to the microwave signal and the microwave beam based on the principle of the Doppler effect Doppler IF signal of the frequency difference between the corresponding echoes;
  • At least one high-frequency equivalent capacitor wherein one end of the high-frequency equivalent capacitor is directly electrically connected to the power supply line of the microwave signal generating circuit, and the other end of the high-frequency equivalent capacitor is grounded to Maintaining the conduction state of the power supply line under direct current to allow the microwave signal generating circuit to be DC powered from the power supply line, and the power supply line is equivalent under the action of the high frequency microwave signal excitation current
  • the electrical characteristics of the inductor and the high-frequency equivalent capacitance form at least one level of LC filter network, so as to suppress the corresponding harmonics in the microwave signal excitation current by filtering out the corresponding harmonics in the microwave signal excitation current. Conduction of waves on the power supply line.
  • the capacitance of the high-frequency equivalent capacitor is set to be less than or equal to 10 pF.
  • the capacitance of the high-frequency equivalent capacitor is set to be less than or equal to 2 pF.
  • the microwave Doppler module includes a plurality of the high-frequency equivalent capacitors, and one end of each of the high-frequency equivalent capacitors is spaced apart from the microwave signal generating circuit.
  • the power supply lines are directly electrically connected, and the other end of each of the high-frequency equivalent capacitors is grounded to form a circuit relationship in which the high-frequency equivalent capacitors are connected in parallel with each other via at least one section of the power supply line.
  • the microwave Doppler module further includes at least one equivalent inductance, wherein the equivalent inductance is connected to the power supply line in series or in parallel to maintain the power supply line under direct current.
  • the conducting state allows the microwave signal generating circuit to be supplied with direct current from the power supply line, and the inductance parameter of the corresponding LC filter network is adjusted by the setting of the equivalent inductance on the power supply line.
  • the microwave Doppler module includes two equivalent inductances and three high-frequency equivalent capacitors, wherein the two equivalent inductances are respectively formed in series on the power supply line In series with each other, one end of each of the high-frequency equivalent capacitors is directly electrically connected to the power supply line by two equal inductance intervals, and the other end of each of the high-frequency equivalent capacitors is grounded, that is, three The high-frequency equivalent capacitance is connected in parallel with each other via the two equivalent inductances.
  • the microwave Doppler module includes two high-frequency equivalent capacitors and one equivalent inductance, wherein the equivalent inductance is formed in series on the power supply line, and two of them One end of the high-frequency equivalent capacitor and two ends of the equivalent inductance are respectively directly electrically connected to the power supply line, wherein the other ends of the two high-frequency equivalent capacitors are grounded.
  • the microwave Doppler module includes one high-frequency equivalent capacitance and one equivalent inductance, wherein the equivalent inductance is formed in series on the power supply line, wherein the One end of the high-frequency equivalent capacitor and one end of the equivalent inductance are directly electrically connected to the power supply line, and the other end of the high-frequency equivalent capacitor is grounded.
  • the microwave Doppler module includes one high-frequency equivalent capacitor and two equivalent inductances, wherein the two equivalent inductances are respectively formed in series on the power supply line. Are connected in series with each other, wherein one end of the high-frequency equivalent capacitor is directly electrically connected to the power supply line between the two equivalent inductances, and the other end of the high-frequency equivalent capacitor is grounded.
  • the microwave Doppler module includes two high-frequency equivalent capacitors and two equivalent inductances, wherein the two equivalent inductances are respectively formed in series on the power supply line In series with each other, one end of the two high-frequency equivalent capacitors and two ends of one of the equivalent inductances are directly electrically connected to the power supply line, and the other end of the two high-frequency equivalent capacitors is connected to the power supply line. Grounded.
  • a first copper plate and a second copper plate are spaced apart to form the antenna loop equivalently, wherein the first copper plate is electrically coupled to the microwave signal generating circuit, and The second copper plate is grounded.
  • the microwave Doppler module further includes a substrate, wherein the second copper plate is coated on the substrate on the opposite surface of the surface where the first copper plate is provided, and the microwave The signal generating circuit is arranged on the opposite surface of the substrate covered with the second copper plate.
  • the power supply line is implemented as a microstrip line and extends with at least one copper clad surface, so that the high frequency etc. are equivalently formed by the copper clad surface and the second copper plate. Effective capacitance.
  • the copper clad surface is arranged in a sector shape.
  • the microwave Doppler module further includes a shielding cover, wherein the shielding cover is disposed on the substrate provided with the microwave One side of the signal generating circuit forms a shielding space containing the microwave signal generating circuit with the second copper plate.
  • the high-frequency equivalent capacitor is formed in the shielding space on the side of the substrate where the microwave signal generating circuit is disposed.
  • the copper-clad surface is formed in the shielding space on the side of the substrate where the microwave signal generating circuit is disposed.
  • FIG. 1 is a schematic diagram of the equivalent circuit principle of a microwave Doppler module according to an embodiment of the present invention.
  • 2A is a schematic diagram of an equivalent circuit structure of a harmonic suppression unit of the microwave Doppler module according to a modified embodiment of the above-mentioned embodiment of the present invention.
  • 2B is a schematic diagram of the equivalent circuit structure of the harmonic suppression unit of the microwave Doppler module according to another modified embodiment of the above-mentioned embodiment of the present invention.
  • 2C is a schematic diagram of the equivalent circuit structure of the harmonic suppression unit of the microwave Doppler module according to another modified embodiment of the above-mentioned embodiment of the present invention.
  • 2D is a schematic diagram of the equivalent circuit structure of the harmonic suppression unit of the microwave Doppler module according to another modified embodiment of the above-mentioned embodiment of the present invention.
  • 2E is a schematic diagram of the equivalent circuit structure of the harmonic suppression unit of the microwave Doppler module according to another modified embodiment of the above-mentioned embodiment of the present invention.
  • 2F is a schematic diagram of the equivalent circuit structure of the harmonic suppression unit of the microwave Doppler module according to another modified embodiment of the above-mentioned embodiment of the present invention.
  • 2G is a schematic diagram of the equivalent circuit structure of the harmonic suppression unit of the microwave Doppler module according to another modified embodiment of the above-mentioned embodiment of the present invention.
  • FIG. 3 is a schematic side view of the structure of the microwave Doppler module according to the above-mentioned embodiment of the present invention.
  • 4A is a schematic diagram of an implementation structure of a high-frequency equivalent capacitor of the harmonic suppression unit of the microwave Doppler module according to the above-mentioned embodiment of the present invention.
  • 4B is a schematic diagram of another implementation structure of the high-frequency equivalent capacitor of the harmonic suppression unit of the microwave Doppler module according to the above-mentioned embodiment of the present invention.
  • 4C is a schematic diagram of an implementation structure of an equivalent inductance of the harmonic suppression unit of the microwave Doppler module according to the above-mentioned embodiment of the present invention.
  • 5A is a test diagram of the microwave Doppler module according to the above-mentioned embodiment of the present invention corresponding to the harmonic radiation in the FCC test after the harmonic suppression unit is removed.
  • FIG. 5B is a test diagram of the microwave Doppler module corresponding to the harmonic radiation in the FCC test according to the above-mentioned embodiment of the present invention.
  • the term “a” should be understood as “at least one” or “one or more”, that is, in one embodiment, the number of an element may be one, and in another embodiment, the number of the element The number can be more than one, and the term “one” cannot be understood as a restriction on the number.
  • the microwave Doppler module includes a harmonic suppression unit 10, a microwave signal generation circuit 20, a mixing detection unit 30, and an antenna loop 40, wherein the microwave signal generation circuit 20 and the mixing detection unit are respectively 30 and the antenna loop 40 are electrically coupled, and are set to be capable of being supplied by direct current to generate a microwave signal excitation current of a corresponding frequency, wherein the antenna loop 40 is electrically coupled with the microwave signal generating circuit 20 in response to the
  • the microwave signal excitation current transmits a microwave beam corresponding to the frequency of the microwave signal excitation current, and receives the corresponding echo formed by the reflection of the microwave beam by at least one object, wherein the frequency mixing detection unit 30 is further connected to the
  • the antenna loop 40 is electrically coupled to output a Doppler intermediate frequency signal corresponding to the frequency difference between the excitation current of the microwave signal and
  • the microwave signal generating circuit 20 acts as a non-linear load. When it is powered by a direct current, it is inevitable that the current flowing through the microwave signal generating circuit 20 and the voltage loaded on it are not in a linear relationship.
  • the excitation current of the microwave signal generates harmonics corresponding to multiples of the fundamental frequency. Due to the matching relationship between the antenna loop 40 and the corresponding microwave signal generating circuit 20, the antenna loop 40 excites the microwave signal The response of the harmonics of the current is suppressed and the microwave beam corresponding to the fundamental frequency of the microwave signal excitation current is radiated mainly in response to the fundamental frequency of the microwave signal excitation current.
  • the line of the microwave signal generating circuit 20 is in a high impedance state and has a certain length under the action of the high frequency microwave signal excitation current, the line of the microwave signal generating circuit 20 can conduct the microwave
  • the signal excitation current is modulated by the microwave signal excitation current to radiate microwaves corresponding to the frequency of the microwave signal excitation current, including stray microwaves corresponding to the harmonics of the microwave signal excitation current, especially corresponding to the microwave
  • the high-order harmonic radiation of the high-order harmonics in the signal excitation current that is easy to produce a modulation effect on the corresponding line.
  • the present invention is based on the generation mechanism of corresponding harmonic radiation, in order to directly hinder the generation of corresponding harmonic radiation, the microwave signal generating circuit 20 is electrically connected or electrically connected to the microwave signal generating circuit 20.
  • the harmonic suppression unit 10 is arranged between the corresponding lines of the sexual coupling to suppress the harmonic direction in the microwave signal excitation current and the microwave signal generation circuit 20 by the filtering characteristics of the harmonic suppression unit 10 Conduction of the corresponding lines that are electrically connected or electrically coupled, the harmonic pair in the microwave signal excitation current generated by the microwave signal generating circuit 20 is electrically connected or electrically coupled to the microwave signal generating circuit 20.
  • the modulation effect of the corresponding line is limited, that is, the generation of corresponding harmonic radiation is hindered, which is beneficial to suppress the harmonic radiation of the microwave Doppler module.
  • the harmonic suppression unit 10 is electrically connected to the power supply line 201 of the microwave signal generating circuit 20 to suppress the harmonics in the microwave signal excitation current.
  • the modulation effect of the harmonics in the microwave signal excitation current generated by the microwave signal generating circuit 20 on the power supply line 201 is limited.
  • the generation of corresponding harmonic radiation on the power supply line 201 is hindered, and the harmonic radiation of the microwave Doppler module is reduced and suppressed.
  • the microwave signal generating circuit 20 is supplied with direct current from the power supply line 201, so the circuit structure of the harmonic suppression unit 10 is configured as an electronic component with filtered electrical characteristics, and The circuit connection structure of the harmonic suppression unit 10 and the power supply line 201 should be able to maintain the on state of the power supply line 201 under direct current.
  • the harmonic suppression unit 10 includes at least one high-frequency equivalent capacitor 101, wherein one end of the high-frequency equivalent capacitor 101 is electrically connected to the power supply line 201 of the microwave signal generating circuit 20, The other end of the high-frequency equivalent capacitor 101 is grounded.
  • the power supply line 201 is equivalent to the electrical characteristics of the inductor under the action of the high-frequency microwave signal excitation current, and the power supply line 201 and the high
  • the frequency equivalent capacitor 101 forms at least one LC filter network and has the electrical characteristics of filtering, thereby suppressing the corresponding harmonics in the microwave signal excitation current by filtering out the corresponding harmonics in the microwave signal excitation current.
  • the conduction of the power supply line 201 in turn hinders the generation of corresponding harmonic radiation on the power supply line 201.
  • the power supply line 201 can be maintained in a DC connected state, that is, the power supply line 201 is connected to the microwave The DC power supply of the signal generating circuit 20 is not affected.
  • the high-order harmonics in the microwave signal excitation current are easier to modulate the power supply line 201 to generate corresponding times of harmonic radiation, which is to filter out the second and above times in the microwave signal excitation current.
  • the capacitance of the high-frequency equivalent capacitor 101 is set to be less than or equal to 10pF, and preferably set to be less than or equal to 2pF, so as to correspondingly filter out the third or more times harmonics in the excitation current of the microwave signal .
  • the harmonic suppression unit 10 includes a plurality of the high-frequency equivalent capacitors 101, wherein one end of each of the high-frequency equivalent capacitors 101 is spaced apart from the microwave signal
  • the power supply line 201 of the generating circuit 20 is electrically connected, and the other end of each of the high-frequency equivalent capacitors 101 is grounded.
  • the equivalent capacitors 101 are connected in parallel with each other via at least one section of the power supply line 201.
  • the equivalent capacitors 101 and the power supply line 201 can form a multi-stage LC filter network with filtering characteristics for multiple harmonics in the microwave signal excitation current, so as to suppress the large amount of the microwave signal excitation current.
  • the conduction of the harmonics of the corresponding multiples to the power supply line 201 that is, the generation of the harmonic radiation of multiple corresponding multiples can be hindered, which is beneficial to suppress the harmonic radiation of the microwave Doppler module.
  • different LC filter networks correspondingly filter out the microwave signal excitation current in the corresponding frequency band, that is, by selecting the high-frequency equivalent capacitor 101 and the corresponding inductance with different capacitance capacities to correspondingly suppress the microwave signal excitation current
  • the harmonics of the corresponding multiples of the microwave signal excitation current generated by the microwave signal generating circuit 20 can modulate the power supply line 201. It is restricted, that is, the generation of corresponding times of harmonic radiation on the power supply line 201 is blocked, which is beneficial to suppress the harmonic radiation of the microwave Doppler module.
  • the harmonic suppression unit 10 further includes at least one equivalent inductance 102, wherein the equivalent inductance 102 is connected to the power supply line 201 in series or in parallel, so that the equivalent inductance 102 is used for the power supply
  • the setting of the line 201 adjusts the inductance parameters in the corresponding LC filter network, that is, the equivalent inductance 102 of different numbers and inductance parameters is set in series or in parallel with the power supply line 201, the equivalent inductance 102 and the power supply
  • the line 201 matches the high-frequency equivalent capacitor 101 of the corresponding capacitance capacity to form at least one-stage LC filter network with filtering characteristics for the corresponding multiples of the harmonics in the microwave signal excitation current, so as to filter out the microwave signal excitation
  • the harmonics of the corresponding times in the current are suppressed from being conducted to the power supply line 201 by the harmonics of the corresponding times in the excitation current of the microwave signal.
  • the harmonic suppression unit 10 includes two equivalent inductances 102 and three high-frequency equivalent capacitors 101, wherein the two equivalent inductances 102 are respectively connected in series Are formed on the power supply line 201 and are connected in series with each other, wherein one end of each of the high-frequency equivalent capacitors 101 is electrically connected to the power supply line 201 by the two equivalent inductances 102 at intervals, and each of the high-frequency equivalents The other end of the capacitor 101 is grounded, that is, the high-frequency equivalent capacitors 101 are connected in parallel with each other via the two equivalent inductances 102.
  • the two equivalent inductances 102A and 102B are located on the power supply line 201 in order to move away from each other along the power supply line 201.
  • the directions of the microwave signal generating circuit 20 are connected in series, and the three high-frequency equivalent capacitors 101A, 101B, and 101C are sequentially connected in parallel via the equivalent inductors 102A and 102B.
  • the capacitance of the high-frequency equivalent capacitor 101A and the inductance parameters of the equivalent inductance 102A are set to meet: the time of the LC filter network formed by the high-frequency equivalent capacitor 101A and the equivalent inductance 102A
  • the constant is matched with the third harmonic frequency of the microwave signal excitation current, so as to correspondingly filter out the third harmonic in the microwave signal excitation current and suppress the third harmonic of the microwave signal excitation current on the power supply line 201. Conduction and radiation.
  • the inductance parameters of the equivalent inductance 102A of the two equivalent inductances 102A and 102B that are close to the microwave signal generating circuit 20 along the power supply line 201, and the three high-frequency equivalent capacitances The capacitance of the high-frequency equivalent capacitor 101A that is close to the microwave signal generating circuit 20 along the power supply line 201 in 101A, 101B, and 101C is set to satisfy: the high-frequency equivalent capacitor 101A and the equivalent inductance
  • the time constant of the LC filter network formed by 102A matches the third harmonic frequency of the excitation current of the microwave signal.
  • the capacitance vector sum of the high-frequency equivalent capacitors 101A, 101B and the inductance parameter vector sum of the equivalent inductances 102A, 102B are set to satisfy: the high-frequency equivalent capacitors 101A, 101B and the The time constant of the LC filter network formed by the effective inductors 102A and 102B is matched with the second harmonic frequency of the microwave signal excitation current to correspondingly filter out the second harmonic in the microwave signal excitation current and suppress the microwave The second harmonic of the signal excitation current is conducted and radiated to the power supply line 201.
  • the vector sum of the inductance parameters of the two equivalent inductances 102A, 102B and the three high-frequency equivalent capacitors 101A, 101B, and 101C are close to the microwave signal generating circuit 20 along the power supply line 201.
  • the capacitance vector sum of the two high-frequency equivalent capacitors 101A, 101B is set to satisfy: the time constant of the LC filter network formed by the high-frequency equivalent capacitors 101A, 101B and the equivalent inductance 102A, 102B and The second harmonic frequency of the excitation current of the microwave signal matches.
  • the capacitance vector sum of the high-frequency equivalent capacitors 101A, 101B, 101C and the inductance parameter vector sum of the equivalent inductances 102A, 102B are set to satisfy: the high-frequency equivalent capacitors 101A, 101B, 101C
  • the time constant of the LC filter network formed with the equivalent inductances 102A and 102B is matched with the fundamental wave frequency of the microwave signal excitation current, so as to correspondingly filter out the fundamental wave in the microwave signal excitation current and suppress the microwave
  • the fundamental wave of the signal excitation current is conducted and radiated by the power supply line 201.
  • multiple inductors directly connected in series and/or in parallel are equivalent to one inductor, that is, multiple inductors connected to each other and not connected to non-inductive electronic components are equivalent to one Inductance
  • multiple capacitors directly connected in series and/or in parallel are equivalent to one capacitor, that is, multiple capacitors connected to each other and not connected to non-capacitor electronic components are equivalent to one capacitor
  • one of the equivalent capacitors 101 and An equivalent inductance 102 should be understood as a component and/or circuit that has capacitance characteristics and inductance characteristics respectively and is equivalent to a capacitor and an inductance under the action of the microwave signal excitation current.
  • the harmonic suppression unit 10 has various embodiments.
  • FIGS. 2A to 2G of the accompanying drawings of the specification of the present invention the harmonic suppression unit 10 of the microwave Doppler module based on various modified embodiments of this embodiment of the present invention
  • the equivalent circuit structure is illustrated in the figure.
  • the harmonic suppression unit 10 includes two high-frequency equivalent capacitors 101 and one equivalent inductance 102, wherein The equivalent inductance 102 is formed in series on the power supply line 201, wherein one end of the two high-frequency equivalent capacitors 101 and both ends of the equivalent inductance 102 are electrically connected to the power supply line 201, two of which are The other end of the high-frequency equivalent capacitor 101 is grounded.
  • the high-frequency equivalent capacitor 101, the equivalent inductance 102, and the power supply line 201 form an impact on the microwave signal excitation current.
  • the corresponding harmonics have an LC filter network with filter characteristics, and the power supply line 201 can be maintained in a connected state under direct current.
  • the harmonic suppression unit 10 includes one high-frequency equivalent capacitor 101 and one equivalent inductance 102, wherein the equivalent inductance 102 is formed in series on the power supply line 201, wherein one end of the high-frequency equivalent capacitor 101 and one end of the equivalent inductance 102 are electrically connected to the power supply line 201, so The other end of the high-frequency equivalent capacitor 101 is grounded.
  • the high-frequency equivalent capacitor 101 and a different end of the equivalent inductor 102 are electrically connected to the power supply line 201.
  • the high-frequency equivalent capacitor 101, the equivalent inductance 102, and the power supply line 201 form an LC filter network with filtering characteristics for the corresponding harmonics in the microwave signal excitation current, and at the same time, the The power supply line 201 can be maintained in an on state under direct current.
  • the harmonic suppression unit 10 includes one high-frequency equivalent capacitor 101 and two equivalent inductances 102, two of which are The equivalent inductances 102 are respectively formed in series on the power supply line 201 and are connected in series with each other, wherein one end of the high-frequency equivalent capacitor 101 is electrically connected to the power supply line 201 between the two equivalent inductances 102, The other end of the high-frequency equivalent capacitor 101 is grounded.
  • the high-frequency equivalent capacitor 101, the equivalent inductance 102, and the power supply line 201 form an impact on the microwave signal excitation current.
  • the corresponding harmonics have an LC filter network with filter characteristics, and the power supply line 201 can be maintained in a connected state under direct current.
  • the harmonic suppression unit 10 includes two high-frequency equivalent capacitors 101 and two equivalent capacitors.
  • Inductor 102 wherein two equivalent inductances 102 are respectively formed in series on the power supply line 201 and are connected in series with each other, wherein one end of the two high-frequency equivalent capacitors 101 is connected to both ends of one of the equivalent inductances 102, respectively. It is electrically connected to the power supply line 201, and the other ends of the two high-frequency equivalent capacitors 101 are grounded.
  • one end of the two high-frequency equivalent capacitors 101 and two ends of the different equivalent inductance 102 are electrically connected to the power supply line 201, respectively.
  • the high-frequency equivalent capacitor 101, the equivalent inductance 102, and the power supply line 201 form an LC filter network with filtering characteristics for the corresponding harmonics in the microwave signal excitation current, and at the same time, the The power supply line 201 can be maintained in an on state under direct current.
  • the harmonic suppression unit 10 includes two high-frequency equivalent capacitors 101 and three equivalent inductances 102, of which three The two equivalent inductances 102 are respectively formed in series on the power supply line 201 and are connected in series with each other.
  • One end of the two high-frequency equivalent capacitors 101 is connected to one of the three equivalent inductances 102 connected in series.
  • the two ends of the equivalent inductance 102 are respectively electrically connected to the power supply line 201, that is, one end of the two high-frequency equivalent capacitors 101 is connected to the three equivalent inductances 102 connected in series.
  • the high-frequency equivalent capacitor 101, the equivalent inductance 102, and the power supply line 201 form an LC filter network with filtering characteristics for the corresponding harmonics in the microwave signal excitation current, and at the same time, the The power supply line 201 can be maintained in an on state under direct current.
  • the equivalent inductance 102 is a component and/or circuit that has inductance characteristics under the action of the microwave signal excitation current and is equivalent to an inductance.
  • the equivalent inductance 102 can be implemented as an option.
  • a resistance connected in series to the power supply line 201 can be equivalent to the power supply line 201 to form the equivalent inductance 102
  • at least one section of the power supply line 201 is used as a microstrip line to equivalently form the equivalent inductance 102.
  • the high-frequency equivalent capacitor 101 is a component and/or circuit that has capacitance characteristics under the action of the microwave signal excitation current and is equivalent to an inductance.
  • the high-frequency equivalent capacitor 102 can be implemented It is selected from one or more interconnected combinations of microstrip capacitors, high-frequency capacitors and microwave capacitors, which is not limited in the present invention.
  • FIG. 3 of the accompanying drawings of the specification of the present invention a schematic side view of the microwave Doppler module according to the above-mentioned embodiments of the present invention is illustrated, in which a first copper plate 401 and a first copper plate 401 are illustrated.
  • the two copper plates 402 are arranged at intervals to form the antenna loop 40 equivalently.
  • the first copper plate 401 and the second copper plate 402 respectively form the radiation source and the reference ground of the antenna loop 40, that is, the first copper plate 401 is electrically coupled to the microwave signal generating circuit 20.
  • the radiation source forming the antenna loop 40, the second copper plate 402 forms the reference ground of the antenna loop 40 to be grounded, and the second copper plate 402 is located on the side where the first copper plate 401 is provided.
  • the opposite surface is covered on a substrate 50, wherein the microwave signal generating circuit 20 is disposed on the opposite surface of the substrate 50 covered with the second copper plate 402, and the microwave signal generating circuit 20 is shielded from the opposite surface.
  • a shielding cover 60 is provided on the substrate 50 in a manner of covering the microwave signal generating circuit 20, so that the shielding cover 60 and The shielding space 70 formed by the second copper plate 402 consumes the stray radiation generated by the microwave signal generating circuit 20 to suppress the harmonic radiation of the microwave Doppler module.
  • the high-frequency equivalent capacitance of the harmonic suppression unit 10 101 can be implemented as a microstrip capacitor equivalently formed between the corresponding microstrip line and the second copper plate 402, so the microwave Doppler module of the present invention is based on the existing microwave Doppler module with simple structure , Easy to implement and low cost.
  • FIGS. 4A and 4B in the accompanying drawings of the specification of the present invention two implementation structures of the high-frequency equivalent capacitor 101 of the harmonic suppression unit 10 according to the above-mentioned embodiment of the present invention are illustrated.
  • the power supply line 201 is implemented as a microstrip line and has two copper-clad surfaces 2011 spaced apart, wherein the microwave signal generating circuit 20 and the second copper plate 402 are spaced apart on both sides of the substrate 50, And the second copper plate 402 is regarded as being grounded as the reference ground of the antenna loop 40, then the two copper clad surfaces 2011 of the power supply line 201 and the second copper plate 402 are equivalent to form two high frequency
  • the copper-clad surface 2011 of the power supply line 201 is set in different shapes.
  • the copper-clad surface 2011 of the power supply line 201 has a certain area and can be equivalent to the second copper plate 402 serving as the reference ground of the antenna loop 40 to form the high-frequency equivalent capacitor 101 ,
  • the specific shape and area of the copper-clad surface 2011 do not constitute a limitation to the present invention, and the copper-clad surface 2011 can be set to have different areas and areas in order to meet the corresponding parameter settings of the high-frequency equivalent capacitor 101 / Or shape, such as sector, square, round, etc.
  • FIG. 4C of the accompanying drawings of the specification of the present invention an implementation structure of the equivalent inductance 102 of the harmonic suppression unit 10 according to the above-mentioned embodiment of the present invention is illustrated, wherein the power supply
  • the line 201 is implemented as a microstrip line, in which at least one section of the microwire is bent and arranged so that under the excitation current of the microwave signal of high frequency, the bent section of the microstrip line is The electrical characteristics equivalent to an inductance under the action of the high-frequency microwave signal excitation current equivalently form the equivalent inductance 102.
  • the bending shape and length of the section of the microstrip line that are bent and set have various deformations and combinations. , The present invention does not limit this.
  • the power supply line 201 inevitably penetrates the shielded space 70, based on the shielding of the microwave signal generating circuit 20, the corresponding harmonics already generated
  • the general ideas and methods of radiation consumption are ignored, because the harmonics in the microwave signal excitation current penetrate the shielded space 70 of the microwave signal generating circuit 20 and have the power supply line 201 of a certain length.
  • the harmonic radiation generated by the modulation action can be further suppressed based on the idea and method of directly obstructing the generation of the corresponding harmonic radiation of the present invention.
  • part of the power supply line 201 is in the shielded space 70, when the generation of corresponding harmonic radiation on the power supply line 201 is blocked, the microwave Doppler module is The harmonic radiation in the shielded space 70 is also reduced, which is beneficial to reduce the self-excited interference to the microwave Doppler module caused by the reflection of the harmonic radiation in the shielded space 70, thereby increasing the microwave frequency. Stability of Puller module.
  • the harmonic suppression unit 10 is preferably arranged in the shielded space 70 to suppress the conduction of the harmonics in the excitation current of the microwave signal to the power supply line 201 outside the shielded space 70, Therefore, the modulation effect of the harmonics in the excitation current of the microwave signal on the power supply line 201 outside the shielded space is limited, so as to directly hinder the generation of corresponding harmonic radiation and combine the current ideas and methods. Due to the general idea and method of consuming the corresponding harmonic radiation that has been generated in the shielded space, the harmonic radiation of the microwave Doppler module can be effectively suppressed.
  • FIG. 5A shows the test data corresponding to the harmonic radiation in the FCC test after the corresponding harmonic suppression unit 10 is removed.
  • FIG. 5B shows the test data according to the present invention.
  • the microwave Doppler module provided with the corresponding harmonic suppression unit 10 corresponds to the test data of the harmonic radiation in the FCC test.
  • the magnitude of the harmonic radiation margin corresponds to the corresponding FCC test
  • the smaller the harmonic radiation margin the closer the corresponding harmonic radiation is to the FCC test corresponding to the harmonic radiation limit standard, and the harmonic radiation margin
  • the harmonic radiation margin When it is negative, the corresponding harmonic radiation exceeds the FCC test corresponding to the harmonic radiation limit standard and cannot pass the FCC certification, that is, the harmonic radiation margin must be greater than zero to meet the FCC test corresponding to the harmonic radiation limit Standard, and the greater the harmonic radiation margin, the better.
  • the third harmonic radiation margin of the microwave Doppler module is 0.53dB, although the harmonic radiation of the microwave Doppler module meets the FCC test corresponding to the harmonic radiation limit standard, the 0.53dB third harmonic radiation margin of the microwave Doppler module is already close to
  • the FCC test corresponds to the harmonic radiation limit standard. Based on the tolerance of the corresponding microwave Doppler module in the actual production, it is difficult for the microwave Doppler module to meet the corresponding harmonics of the FCC test. Radiation limit standards.
  • the third harmonic radiation of the microwave Doppler module The amount is 8.78dB.
  • the corresponding harmonic suppression unit 10 is significantly increased
  • the third harmonic radiation margin of the corresponding microwave Doppler module that is, the harmonic radiation of the corresponding microwave Doppler module is effectively suppressed.

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Abstract

一微波多普勒模块，其中所述微波多普勒模块包括相互电性耦合的一微波信号发生电路（20）、一天线回路（40）和一混频检波单元（30），并包括至少一高频等效电容（101），其中所述高频等效电容（101）一端被直接电性连接于所述微波信号发生电路（20）的一供电线路（201），以维持所述供电线路（201）在直流下的导通状态而允许所述微波信号发生电路（20）自所述供电线路（201）被直流供电，并基于直接阻碍相应的谐波辐射的产生的思想和方式，藉由所述供电线路（201）和所述高频等效电容（101）形成的至少一级LC滤波网络，以于所述供电线路（201）滤除所述微波信号发生电路（20）的微波信号激励电流中的相应谐波的方式，抑制所述微波多普勒模块的谐波辐射。

Description

微波多普勒模块 技术领域
本发明涉及微波多普勒模块，特别涉及具有谐波抑制功能的一微波多普勒模块。
背景技术
随着物联网技术的发展，人工智能、智能家居、以及智能安防技术对于环境探测，特别是对于人的存在、移动以及微动的动作特征的探测的需求越来越多，其中无线电技术，包括基于多普勒效应原理的微波探测技术作为人与物，物与物之间相联的重要枢纽在行为探测和存在探测技术中具有独特的优势，其能够在不侵犯人隐私的情况下，探测出活动物体，比如人的动作特征、移动特征、以及微动特征，甚至是人的心跳和呼吸特征信息，因而具有广泛的应用前景。
由于无线电技术同时作为通信领域中信息传递的枢纽而关乎经济和国防安全，因此基于多普勒效应原理的微波多普勒模块在被使用过程中必须严格遵守相应的国际标准和满足相应的地区法规，如由ITU-R(ITU Radiocommunication Sector，国际通信联盟无线电通信局)定义的供开放给诸如工业、科学和医学等机构使用的无需授权许可的ISM(Industrial Scientific Medical)频段，其中在ITU-R开放的这些频段中，被应用于基于多普勒效应原理的微波多普勒模块的频段主要有2.4Ghz、5.8Ghz、10.525Ghz、24.125Gh等频段，而基于多普勒效应原理的微波多普勒模块在使用这些频段时还需满足相应的国家和地区认证标准，如欧盟的RED认证和美国的FCC认证，其中基于美国的FCC认证标准对相应的微波多普勒模块的认证包括对相应的微波多普勒模块的谐波辐射的限制标准。
可以理解的是，现有的基于多普勒效应原理的微波多普勒模块被直流供电而藉由一振荡电路产生相应基波频率的微波激励电流，并藉由所述微波激励电流对与所述振荡电路电性耦合的一辐射源馈电，从而使得所述辐射源能够和被间隔设置于所述辐射源的一参考地相互作用而发射对应于所述微波激励电流的频率的微波波束。其中所述振荡电路作为非线性负载，其在被直流供电时，由于流经所述振荡电路的电流与加载于其上的电压不呈线性关系而不可避免地于所述微波激励电流产生对应基波频率倍数的谐波。由于所述辐射源和所述参考地与相应的 所述振荡电路的匹配关系，所述辐射源和所述参考地对所述微波激励电流的谐波的响应被抑制而主要响应于所述微波激励电流的基波频率地辐射对应于所述微波激励电流的基波频率的微波波束。然而，由于所述振荡电路的线路在高频的微波激励电流作用下呈高阻抗状态并具有一定的长度，则所述振荡电路的线路能够被所述微波激励电流调制而辐射对应于所述微波激励电流频率的微波，包括对应于所述微波激励电流的谐波的杂散微波，尤其是对应于所述微波激励电流的易于对相应线路产生调制作用的高次谐波的高次谐波辐射。因此，目前主要通过屏蔽所述振荡电路的思想和方式抑制相应的所述微波多普勒模块的谐波辐射。如通过所述参考地和一屏蔽罩形成容置有所述振荡电路的一屏蔽空间，从而抑制所述振荡电路的产生的杂散微波于所述屏蔽空间之外的辐射干扰。
然而，现有的微波多普勒模块的杂散辐射仍然严重，主要是对应于所述微波激励电流的基波频率的谐波辐射，以及对应于所述微波激励电流的基波频率的三倍频、五倍频、七倍频和九倍频的谐波辐射，虽然三倍频之后的谐波辐射的能量会急剧降低，但目前的2.4G和5.8G等主流频段的所述微波多普勒模块的谐波辐射中处于相应法律法规限制要求的谐波辐射仍难以满足相应的标准要求，如目前的通过屏蔽所述振荡电路的思想和方式制备的所述微波多普勒模块在FCC认证的对谐波辐射的限制标准下的通过率难以保障，尤其是FCC认证中对高次谐波辐射的限制标准，因此，如何突破和结合目前的基于屏蔽所述振荡电路的通用思想和方式抑制所述微波多普勒模块的谐波辐射，从而提高所述微波多普勒模块的抗干扰性能而使得所述微波多普勒模块能够满足相应的国家和地区认证标准，是具有重要的安全意义和商业价值的。
发明内容
本发明的一个目的在于提供一微波多普勒模块，其中基于直接阻碍相应的谐波辐射的产生的思想和方式，所述微波多普勒模块的谐波辐射能够被有效地抑制。
本发明的一个目的在于提供一微波多普勒模块，其中通过抑制所述微波多普勒模块的一微波信号发生电路所产生的微波信号激励电流中的谐波的传导，相应的谐波辐射的产生被阻碍而有利于抑制所述微波多普勒模块的谐波辐射。
本发明的一个目的在于提供一微波多普勒模块，其中基于直接阻碍相应的谐 波辐射的产生的思想和方式，突破了目前的基于屏蔽所述微波信号发生电路而对已然产生的相应的谐波辐射进行消耗的通用思想和方式，即增加了对所述微波多普勒模块的谐波辐射的抑制手段的可选性，有利于基于不同的思想和方式的组合提高对所述微波多普勒模块的谐波辐射的抑制效果。
本发明的一个目的在于提供一微波多普勒模块，其中通过抑制所述微波信号发生电路所产生的微波信号激励电流中的谐波向与所述微波信号发生电路电性相连或电性耦合的相应线路的传导，则所述微波信号发生电路所产生的微波信号激励电流中的谐波对与所述微波信号发生电路电性相连或电性耦合的相应线路的调制作用被限制，即相应的谐波辐射的产生被阻碍而有利于抑制所述微波多普勒模块的谐波辐射。
本发明的一个目的在于提供一微波多普勒模块，其中通过抑制所述微波信号发生电路所产生的微波信号激励电流中的谐波向与所述微波信号发生电路电性相连或电性耦合的相应线路的传导，尤其有利于限制所述微波信号发生电路所产生的微波信号激励电流中的高次谐波对与所述微波信号发生电路电性相连或电性耦合的相应线路的调制作用，即相应的高次谐波辐射的产生能够被有效地阻碍而有利于抑制所述微波多普勒模块的高次谐波辐射。
本发明的一个目的在于提供一微波多普勒模块，其中所述微波多普勒模块包括至少一高频等效电容，其中所述高频等效电容电性连接于所述微波信号发生电路，以藉由所述高频等效电容在高频电信号作用下的谐振特性抑制微波信号激励电流中的谐波向与所述微波信号发生电路电性相连或电性耦合的相应线路的传导。
本发明的一个目的在于提供一微波多普勒模块，其中选择不同电容容量的所述高频等效电容对应抑制微波信号激励电流中相应倍次的谐波向与所述微波信号发生电路电性相连或电性耦合的线路的传导，则所述微波信号发生电路所产生的微波信号激励电流中相应倍次的谐波对与所述微波信号发生电路电性相连或电性耦合的相应线路的调制作用被限制，即相应倍次的谐波辐射的产生被阻碍而有利于抑制所述微波多普勒模块的谐波辐射。
本发明的一个目的在于提供一微波多普勒模块，其中多个所述高频等效电容被并联设置，以抑制微波信号激励电流中多个相应倍次的谐波向与所述微波信号发生电路电性相连或电性耦合的相应线路的传导，即多个相应倍次的谐波辐射的 产生能够被阻碍而有利于抑制所述微波多普勒模块的谐波辐射。
本发明的一个目的在于提供一微波多普勒模块，其中所述微波多普勒模块包括至少一等效电感，以藉由所述等效电感和所述高频等效电容形成的至少一级LC滤波网络对微波信号激励电流中的相应谐波的滤除作用，抑制微波信号激励电流中的谐波向与所述微波信号发生电路电性相连或电性耦合的相应线路的传导。
本发明的一个目的在于提供一微波多普勒模块，其中相应的谐波辐射的产生被阻碍而减少了谐波辐射，以在结合目前的于一屏蔽空间对已然产生的相应的谐波辐射进行消耗的通用思想和方式抑制所述微波多普勒模块的谐波辐射时，有利于降低因谐波辐射于所述屏蔽空间的反射造成的自激干扰，从而提高所述微波多普勒模块的稳定性。
本发明的一个目的在于提供一微波多普勒模块，其中基于直接阻碍相应的谐波辐射的产生的思想和方式，和结合目前的于所述屏蔽空间对已然产生的相应的谐波辐射进行消耗的通用思想和方式，在屏蔽所述微波信号发生电路而对已然产生的相应的谐波辐射进行消耗的通用思想和方式中被忽略的，因微波信号激励电流中的谐波对所述微波信号发生电路的穿透所述屏蔽空间并具有一定长度的供电线路和信号传输线路的调制作用而产生的谐波辐射能够进一步被抑制。
本发明的一个目的在于提供一微波多普勒模块，其中所述高频等效电容被设置于所述屏蔽空间，以抑制微波信号激励电流中的谐波向所述屏蔽空间之外的与所述微波信号发生电路电性相连或电性耦合的相应线路的传导，从而限制微波信号激励电流中的谐波对所述屏蔽空间之外的与所述微波信号发生电路电性相连或电性耦合的相应线路的调制作用。
本发明的一个目的在于提供一微波多普勒模块，其中基于直接阻碍相应的谐波辐射的产生的思想和方式，和结合目前的于所述屏蔽空间对已然产生的相应的谐波辐射进行消耗的通用思想和方式，所述微波多普勒模块能够在FCC认证中满足谐波辐射的相应限制标准，即所述微波多普勒模块的谐波辐射增益低至具有能够被FCC认证标准认证的抗干扰性能。
为实现以上至少一目的，本发明提供一微波多普勒模块，其中所述微波多普勒模块包括：
一微波信号发生电路，其中所述微波信号发生电路具有一供电线路，并被设 置允许自所述供电线路被直流供电而产生相应频率的微波信号激励电流；
一天线回路，其中所述天线回路与所述微波信号发生电路电性耦合，并被设置允许响应所述微波信号激励电流地发射微波波束，和接收所述微波波束被至少一物体反射而形成的相应回波；
一混频检波单元，其中所述混频检波单元电性耦合于所述微波信号发生电路和所述天线回路，以基于多普勒效应原理输出对应于所述微波信号激励电流与所述微波波束的相应回波之间的频率差异的多普勒中频信号；以及
至少一高频等效电容，其中所述高频等效电容的一端被直接电性连接于所述微波信号发生电路的所述供电线路，所述高频等效电容的另一端被接地，以维持所述供电线路在直流下的导通状态而允许所述微波信号发生电路自所述供电线路被直流供电，并藉由所述供电线路在高频的所述微波信号激励电流作用下等效于电感的电学特性与所述高频等效电容形成至少一级LC滤波网络，从而通过滤除所述微波信号激励电流中的相应谐波的方式，抑制所述微波信号激励电流中的相应谐波于所述供电线路的传导。
根据本发明的一个实施例，其中所述高频等效电容的电容容量被设置小于等于10pF。
根据本发明的一个实施例，其中所述高频等效电容的电容容量被设置小于等于2pF。
根据本发明的一个实施例，其中所述微波多普勒模块包括多个所述高频等效电容，其中各所述高频等效电容的一端间隔地与所述微波信号发生电路的所述供电线路直接电性相连，各所述高频等效电容的另一端被接地，以形成各所述高频等效电容经至少一段所述供电线路相互并联的电路关系。
根据本发明的一个实施例，其中所述微波多普勒模块还包括至少一等效电感，其中所述等效电感串联或并联设置于所述供电线路，以维持所述供电线路在直流下的导通状态而允许所述微波信号发生电路自所述供电线路被直流供电，并藉由所述等效电感于所述供电线路的设置调整相应LC滤波网络的电感参数。
根据本发明的一个实施例，其中所述微波多普勒模块包括两个所述等效电感和三个所述高频等效电容，其中两所述等效电感分别串联形成于所述供电线路而相互串联，其中各所述高频等效电容的一端被两所述等电感间隔地与所述供电线路直接电性连接，各所述高频等效电容的另一端被接地，即三个所述高频等效电 容经两个所述等效电感相互并联。
根据本发明的一个实施例，其中所述微波多普勒模块包括两个所述高频等效电容和一个所述等效电感，其中所述等效电感串联形成于所述供电线路，其中两所述高频等效电容的一端于所述等效电感的两端分别被直接电性连接于所述供电线路，其中两所述高频等效电容的另一端被接地。
根据本发明的一个实施例，其中所述微波多普勒模块包括一个所述高频等效电容和一个所述等效电感，其中所述等效电感串联形成于所述供电线路，其中所述高频等效电容的一端于所述等效电感的其中一端被直接电性连接于所述供电线路，所述高频等效电容的另一端被接地。
根据本发明的一个实施例，其中所述微波多普勒模块包括一个所述高频等效电容和两个所述等效电感，其中两所述等效电感分别串联形成于所述供电线路而相互串联，其中所述高频等效电容的一端于两所述等效电感之间被直接电性连接于所述供电线路，所述高频等效电容的另一端被接地。
根据本发明的一个实施例，其中所述微波多普勒模块包括两个所述高频等效电容和两个所述等效电感，其中两所述等效电感分别串联形成于所述供电线路而相互串联，其中两所述高频等效电容的一端于其中一所述等效电感的两端分别被直接电性连接于所述供电线路，两所述高频等效电容的另一端被接地。
根据本发明的一个实施例，其中一第一铜板和一第二铜板被间隔设置以等效形成所述天线回路，其中所述第一铜板被电性耦合于所述微波信号发生电路，所述第二铜板被接地。
根据本发明的一个实施例，其中所述微波多普勒模块进一步包括一基板，其中所述第二铜板于设置有所述第一铜板的一面的相对面被覆于所述基板，其中所述微波信号发生电路被设置于所述基板的覆有所述第二铜板的一面的相对面。
根据本发明的一个实施例，其中所述供电线路被实施为微带线并延伸有至少一覆铜面，以藉由所述覆铜面和所述第二铜板等效形成所述高频等效电容。
根据本发明的一个实施例，其中所述覆铜面被设置为扇形。
根据本发明的一个实施例，其中所述微波多普勒模块进一步包括一屏蔽罩，其中所述屏蔽罩以罩设所述微波信号发生电路的方式被设置于所述基板的设置有所述微波信号发生电路的一面，以与所述第二铜板形成容置有所述微波信号发生电路的一屏蔽空间。
根据本发明的一个实施例，其中所述高频等效电容于所述基板的设置有所述微波信号发生电路的一面形成于所述屏蔽空间内。
根据本发明的一个实施例，其中所述覆铜面于所述基板的设置有所述微波信号发生电路的一面形成于所述屏蔽空间内。
附图说明
图1为依本发明的一实施例的一微波多普勒模块的等效电路原理示意图。
图2A为依本发明的上述实施例的一变形实施例的所述微波多普勒模块的一谐波抑制单元的等效电路结构示意图。
图2B为依本发明的上述实施例的另一变形实施例的所述微波多普勒模块的所述谐波抑制单元的等效电路结构示意图。
图2C为依本发明的上述实施例的另一变形实施例的所述微波多普勒模块的所述谐波抑制单元的等效电路结构示意图。
图2D为依本发明的上述实施例的另一变形实施例的所述微波多普勒模块的所述谐波抑制单元的等效电路结构示意图。
图2E为依本发明的上述实施例的另一变形实施例的所述微波多普勒模块的所述谐波抑制单元的等效电路结构示意图。
图2F为依本发明的上述实施例的另一变形实施例的所述微波多普勒模块的所述谐波抑制单元的等效电路结构示意图。
图2G为依本发明的上述实施例的另一变形实施例的所述微波多普勒模块的所述谐波抑制单元的等效电路结构示意图。
图3为依本发明的上述实施例的所述微波多普勒模块的侧视结构示意图。
图4A为依本发明的上述实施例的所述微波多普勒模块的所述谐波抑制单元的一高频等效电容的一种实施结构示意图。
图4B为依本发明的上述实施例的所述微波多普勒模块的所述谐波抑制单元的所述高频等效电容的另一种实施结构示意图。
图4C为依本发明的上述实施例的所述微波多普勒模块的所述谐波抑制单元的一等效电感的一种实施结构示意图。
图5A为依本发明的上述实施例的所述微波多普勒模块在去除所述谐波抑制单元后于FCC测试中对应于谐波辐射的测试图。
图5B为依本发明的上述实施例的所述微波多普勒模块于FCC测试中对应于谐波辐射的测试图。
具体实施方式
以下描述用于揭露本发明以使本领域技术人员能够实现本发明。以下描述中的优选实施例只作为举例，本领域技术人员可以想到其他显而易见的变型。在以下描述中界定的本发明的基本原理可以应用于其他实施方案、变形方案、改进方案、等同方案以及没有背离本发明的精神和范围的其他技术方案。
本领域技术人员应理解的是，在本发明的揭露中，术语“纵向”、“横向”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”等指示的方位或位置关系是基于附图所示的方位或位置关系，其仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此上述术语不能理解为对本发明的限制。
可以理解的是，术语“一”应理解为“至少一”或“一个或多个”，即在一个实施例中，一个元件的数量可以为一个，而在另外的实施例中，该元件的数量可以为多个，术语“一”不能理解为对数量的限制。
参考本发明的说明书附图之图1所示，依本发明的一实施例的一微波多普勒模块被图示说明，其主要展示了所述微波多普勒模块的等效电路原理，其中所述微波多普勒模块包括一谐波抑制单元10、一微波信号发生电路20、一混频检波单元30以及一天线回路40，其中所述微波信号发生电路20分别与所述混频检波单元30和所述天线回路40电性耦合，并被设置为能够被直流供电而产生相应频率的微波信号激励电流，其中所述天线回路40与所述微波信号发生电路20电性耦合而响应所述微波信号激励电流地发射对应于所述微波信号激励电流的频率的微波波束，并接收所述微波波束被至少一物体反射而形成的相应回波，其中所述混频检波单元30进一步与所述天线回路40电性耦合，以基于多普勒效应原理输出对应于所述微波信号激励电流与所述微波波束的相应回波之间的频率差异的多普勒中频信号，其中所述谐波抑制单元10电性连接于所述微波信号发生电路20并被设置为具有滤波的电学特性的电子元器件，以抑制所述微波信号发生电路20产生的所述微波信号激励电流中的谐波向与所述微波信号发生电路20电性相连或电性耦合的相应线路的传导，则所述微波信号发生电路20产生的所 述微波信号激励电流中的谐波对与所述微波信号发生电路20电性相连或电性耦合的相应线路的调制作用被限制，即相应的谐波辐射的产生被阻碍而有利于抑制所述微波多普勒模块的谐波辐射。
可以理解的是，所述微波信号发生电路20作为非线性负载，其在被直流供电时，由于流经所述微波信号发生电路20的电流与加载于其上的电压不呈线性关系而不可避免地于所述微波信号激励电流产生对应基波频率倍数的谐波，其中由于所述天线回路40与相应的所述微波信号发生电路20的匹配关系，所述天线回路40对所述微波信号激励电流的谐波的响应被抑制而主要响应于所述微波信号激励电流的基波频率地辐射对应于所述微波信号激励电流的基波频率的所述微波波束。然而，由于所述微波信号发生电路20的线路在高频的所述微波信号激励电流的作用下呈高阻抗状态并具有一定的长度，则所述微波信号发生电路20的线路能够传导所述微波信号激励电流并被所述微波信号激励电流调制而辐射对应于所述微波信号激励电流频率的微波，包括对应于所述微波信号激励电流的谐波的杂散微波，尤其是对应于所述微波信号激励电流中易于对相应线路产生调制作用的高次谐波的高次谐波辐射。
因此，本发明基于相应谐波辐射的产生机制，以直接阻碍相应的谐波辐射的产生的思想和方式，在所述微波信号发生电路20和与所述微波信号发生电路20电性相连或电性耦合的相应线路之间设置所述谐波抑制单元10，以藉由所述谐波抑制单元10的滤波特性，抑制所述微波信号激励电流中的谐波向与所述微波信号发生电路20电性相连或电性耦合的相应线路的传导，则所述微波信号发生电路20产生的所述微波信号激励电流中的谐波对与所述微波信号发生电路20电性相连或电性耦合的相应线路的调制作用被限制，即相应的谐波辐射的产生被阻碍而有利于抑制所述微波多普勒模块的谐波辐射。
具体地，在本发明的这个实施例中，所述谐波抑制单元10电性连接于所述微波信号发生电路20的供电线路201，以抑制所述微波信号激励电流中的谐波于与所述微波信号发生电路20电性相连的供电线路201的传导，则所述微波信号发生电路20产生的所述微波信号激励电流中的谐波对所述供电线路201的调制作用被限制，即所述供电线路201上的相应谐波辐射的产生被阻碍，所述微波多普勒模块的谐波辐射得以减少而被抑制。
值得一提的是，所述微波信号发生电路20自所述供电线路201被直流供电， 因此被设置为具有滤波的电学特性的电子元器件的所述谐波抑制单元10的电路结构，和所述谐波抑制单元10与所述供电线路201的电路连接结构应当满足能够维持所述供电线路201在直流下的接通状态。
具体地，所述谐波抑制单元10包括至少一高频等效电容101，其中所述高频等效电容101的一端被电性连接于所述微波信号发生电路20的所述供电线路201，所述高频等效电容101的另一端被接地。如此以在高频的所述微波信号激励电流下，藉由所述供电线路201在高频的所述微波信号激励电流作用下等效于电感的电学特性，所述供电线路201与所述高频等效电容101形成至少一级LC滤波网络而具有滤波的电学特性，从而通过滤除所述微波信号激励电流中的相应谐波的方式，抑制所述微波信号激励电流中的相应谐波向所述供电线路201的传导，进而阻碍所述供电线路201上相应谐波辐射的产生，同时所述供电线路201能够维持在直流下的接通状态，即自所述供电线路201对所述微波信号发生电路20的直流供电不受影响。
进一步地，所述微波信号激励电流中高倍次的谐波更易于对所述供电线路201调制而产生相应倍次的谐波辐射，为对应滤除所述微波信号激励电流中二次及以上倍次的谐波，所述高频等效电容101的电容容量被设置小于等于10pF，并优选地被设置小于等于2pF，以对应滤除所述微波信号激励电流中三次及以上倍次的谐波。
特别地，在本发明的这个实施例中，所述谐波抑制单元10包括多个所述高频等效电容101，其中各所述高频等效电容101的一端间隔地与所述微波信号发生电路20的所述供电线路201电性相连，各所述高频等效电容101的另一端被接地，如此则各所述等效电容101经至少一段所述供电线路201相互并联，则多个所述等效电容101能够与所述供电线路201形成对所述微波信号激励电流中多个倍次的谐波具有滤波特性的多级LC滤波网络，以抑制所述微波信号激励电流中多个相应倍次的谐波向所述供电线路201的传导，即多个相应倍次的谐波辐射的产生能够被阻碍而有利于抑制所述微波多普勒模块的谐波辐射。
值得一提的是，不同的LC滤波网络对应滤除相应频段的所述微波信号激励电流，即通过选择不同电容容量的所述高频等效电容101和相应电感对应抑制所述微波信号激励电流中相应倍次的谐波向所述供电线路201的传导，则所述微波信号发生电路20所产生的所述微波信号激励电流中相应倍次的谐波对所述供电 线路201的调制作用能够被限制，即所述供电线路201上相应倍次的谐波辐射的产生被阻碍而有利于抑制所述微波多普勒模块的谐波辐射。
具体地，所述谐波抑制单元10还包括至少一等效电感102，其中所述等效电感102串联或并联设置于所述供电线路201，以藉由所述等效电感102于所述供电线路201的设置调节相应LC滤波网络中的电感参数，即通过不同数量和电感参数的所述等效电感102于所述供电线路201的串联或并联设置，所述等效电感102和所述供电线路201匹配相应电容容量的所述高频等效电容101而形成对所述微波信号激励电流中相应倍次的谐波具有滤波特性的至少一级LC滤波网络，以滤除所述微波信号激励电流中相应倍次的谐波而抑制所述微波信号激励电流中相应倍次的谐波向所述供电线路201的传导。
具体地，在本发明的这个实施例中，所述谐波抑制单元10包括两个所述等效电感102和三个所述高频等效电容101，其中两所述等效电感102分别串联形成于所述供电线路201而相互串联，其中各所述高频等效电容101的一端被两所述等效电感102间隔地与所述供电线路201电性连接，各所述高频等效电容101的另一端被接地，即各所述高频等效电容101经两所述等效电感102相互并联。
详细地，参考本发明的说明书附图之图1所示，在本发明的这个实施例中，两个所述等效电感102A、102B于所述供电线路201以沿所述供电线路201顺序远离所述微波信号发生电路20的方向串联，三个所述高频等效电容101A、101B、101C顺序经所述等效电感102A、102B而相互并联。优选地，所述高频等效电容101A的电容容量和所述等效电感102A的电感参数被设置满足：所述高频等效电容101A和所述等效电感102A形成的LC滤波网络的时间常数与所述微波信号激励电流的三次谐波频率相匹配，以对应滤除所述微波信号激励电流中的三次谐波而抑制所述微波信号激励电流的三次谐波于所述供电线路201的传导和辐射。也就是说，两个所述等效电感102A、102B中沿所述供电线路201靠近所述微波信号发生电路20的所述等效电感102A的电感参数，和三个所述高频等效电容101A、101B、101C中沿所述供电线路201靠近所述微波信号发生电路20的所述高频等效电容101A的电容容量被设置满足：所述高频等效电容101A和所述等效电感102A形成的LC滤波网络的时间常数与所述微波信号激励电流的三次谐波频率相匹配。
进一步地，所述高频等效电容101A、101B的电容容量矢量和与所述等效电 感102A、102B的电感参数矢量和被设置满足：所述高频等效电容101A、101B和所述等效电感102A、102B形成的LC滤波网络的时间常数与所述微波信号激励电流的二次谐波频率相匹配，以对应滤除所述微波信号激励电流中的二次谐波而抑制所述微波信号激励电流的二次谐波于所述供电线路201的传导和辐射。也就是说，两个所述等效电感102A、102B的电感参数矢量和，与三个所述高频等效电容101A、101B、101C中沿所述供电线路201靠近所述微波信号发生电路20的两个所述高频等效电容101A、101B的电容容量矢量和被设置满足：所述高频等效电容101A、101B和所述等效电感102A、102B形成的LC滤波网络的时间常数与所述微波信号激励电流的二次谐波频率相匹配。
进一步地，所述高频等效电容101A、101B、101C的电容容量矢量和与所述等效电感102A、102B的电感参数矢量和被设置满足：所述高频等效电容101A、101B、101C和所述等效电感102A、102B形成的LC滤波网络的时间常数与所述微波信号激励电流的基波频率相匹配，以对应滤除所述微波信号激励电流中的基波而抑制所述微波信号激励电流的基波于所述供电线路201的传导和辐射。
可以理解的是，基于电容和电感的电学特性，直接串联和/或并联的多个电感等效于一个电感，即相互连接且未连接有非电感的电子元器件的多个电感等效于一个电感，直接串联和/或并联的多个电容等效于一个电容，即相互连接且未连接有非电容的电子元器件的多个电容等效于一个电容，其中一个所述等效电容101和一个所述等效电感102应当理解为在所述微波信号激励电流作用下分别具有电容特性和电感特性并分别等效于一个电容和一个电感的元器件和/或线路，在此基础上，所述谐波抑制单元10具有多种实施方式。
具体地，参考本发明的说明书附图之图2A至图2G所示，基于本发明的这一实施例的多种变形实施例的所述微波多普勒模块的所述谐波抑制单元10的等效电路结构被图示说明。
参考本发明的说明书附图之图2A，在本发明的这个变形实施例中，所述谐波抑制单元10包括两个所述高频等效电容101和一个所述等效电感102，其中所述等效电感102串联形成于所述供电线路201，其中两所述高频等效电容101的一端于所述等效电感102的两端分别被电性连接于所述供电线路201，其中两所述高频等效电容101的另一端被接地，通过这样的方式，所述高频等效电容101、所述等效电感102以及所述供电线路201形成对所述微波信号激励电流中的相应 谐波具有滤波特性的LC滤波网络，同时所述供电线路201能够维持在直流下的接通状态。
参考本发明的说明书附图之图2B和图2C，在本发明的这两个变形实施例中，所述谐波抑制单元10包括一个所述高频等效电容101和一个所述等效电感102，其中所述等效电感102串联形成于所述供电线路201，其中所述高频等效电容101的一端于所述等效电感102的一端被电性连接于所述供电线路201，所述高频等效电容101的另一端被接地。区别地，对比图2B和图2C，所述高频等效电容101的一端于所述等效电感102的不同端被电性连接于所述供电线路201。通过这样的方式，所述高频等效电容101、所述等效电感102以及所述供电线路201形成对所述微波信号激励电流中的相应谐波具有滤波特性的LC滤波网络，同时所述供电线路201能够维持在直流下的接通状态。
参考本发明的说明书附图之图2D，在本发明的这个实施例中，所述谐波抑制单元10包括一个所述高频等效电容101和两个所述等效电感102，其中两所述等效电感102分别串联形成于所述供电线路201而相互串联，其中所述高频等效电容101的一端于两所述等效电感102之间被电性连接于所述供电线路201，所述高频等效电容101的另一端被接地，通过这样的方式，所述高频等效电容101、所述等效电感102以及所述供电线路201形成对所述微波信号激励电流中的相应谐波具有滤波特性的LC滤波网络，同时所述供电线路201能够维持在直流下的接通状态。
参考本发明的说明书附图之图2E和图2F，在本发明的这两个实施例中，所述谐波抑制单元10包括两个所述高频等效电容101和两个所述等效电感102，其中两所述等效电感102分别串联形成于所述供电线路201而相互串联，其中两所述高频等效电容101的一端于其中一所述等效电感102的两端分别被电性连接于所述供电线路201，两所述高频等效电容101的另一端被接地。区别地，对比图2E和图2F，两所述高频等效电容101的一端于不同的所述等效电感102的两端分别被电性连接于所述供电线路201。通过这样的方式，所述高频等效电容101、所述等效电感102以及所述供电线路201形成对所述微波信号激励电流中的相应谐波具有滤波特性的LC滤波网络，同时所述供电线路201能够维持在直流下的接通状态。
参考本发明的说明书附图之图2G，在本发明的这个实施例中，所述谐波抑制 单元10包括两个所述高频等效电容101和三个所述等效电感102，其中三个所述等效电感102分别串联形成于所述供电线路201而相互串联，其中两个所述高频等效电容101的一端于相互串联的三个所述等效电感102的中间一个所述等效电感102的两端分别被电性连接于所述供电线路201，即两个所述高频等效电容101的一端于相互串联的三个所述等效电感102的两两相连处分别被电性连接于所述供电线路201，两个所述高频等效电容101的另一端被接地。通过这样的方式，所述高频等效电容101、所述等效电感102以及所述供电线路201形成对所述微波信号激励电流中的相应谐波具有滤波特性的LC滤波网络，同时所述供电线路201能够维持在直流下的接通状态。
可以理解的是，所述等效电感102为在所述微波信号激励电流作用下具有电感特性而等效于一个电感的元器件和/或线路，如所述等效电感102可以被实施为选自微带线、高频电感和电阻中的一种或以上相互连接的组合，例如串联设置于所述供电线路201的一个电阻能够与所述供电线路201等效形成一个所述等效电感102，或所述供电线路201的至少一段作为微带线而等效形成一个所述等效电感102。同样地，所述高频等效电容101为在所述微波信号激励电流作用下具有电容特性而等效于一个电感的元器件和/或线路，如所述高频等效电容102可以被实施为选自微带电容，高频电容和微波电容中的一种或以上相互连接的组合，本发明对此不作限制。
示例地，参考本发明的说明书附图之图3所示，依本发明的上述这些实施例的所述微波多普勒模块的侧视示意图被图示说明，其中一第一铜板401和一第二铜板402被间隔设置以等效形成所述天线回路40。具体地，所述第一铜板401和所述第二铜板402分别形成所述天线回路40的辐射源和参考地，即所述第一铜板401被电性耦合于所述微波信号发生电路20而形成所述天线回路40的辐射源，所述第二铜板402是为被接地而形成所述天线回路40的参考地，其中所述第二铜板402于设置有所述第一铜板401的一面的相对面被覆于一基板50，其中所述微波信号发生电路20被设置于所述基板50的覆有所述第二铜板402的一面的相对面，其中基于屏蔽所述微波信号发生电路20而对已然产生的相应的谐波辐射进行消耗的通用思想和方式，一屏蔽罩60以罩设所述微波信号发生电路20的方式被设置于所述基板50，如此以藉由所述屏蔽罩60和所述第二铜板402形成的一屏蔽空间70对所述微波信号发生电路20产生的杂散辐射进行消耗的方 式抑制所述微波多普勒模块的谐波辐射。
通过这样的方式，在所述谐波抑制单元10同样被设置于所述基板50的设置有所述微波信号发生电路20的一面时，所述谐波抑制单元10的所述高频等效电容101能够被实施为由相应的微带线和所述第二铜板402之间等效形成的微带电容，因此本发明的所述微波多普勒模块基于现有的微波多普勒模块结构简单，易于实施且成本低廉。
具体地，结合本发明的说明书附图之图4A和图4B所示，依本发明的上述实施例的所述谐波抑制单元10的所述高频等效电容101的两种实施结构被示意，其中所述供电线路201被实施为微带线并间隔延伸有两覆铜面2011，其中由于所述微波信号发生电路20和所述第二铜板402被间隔设置于所述基板50的两面，且所述第二铜板402作为所述天线回路40的参考地视为被接地，则所述供电线路201的两所述覆铜面2011与所述第二铜板402等效形成两所述高频等效电容101，其中所述供电线路201的两所述覆铜面2011等效于所述高频等效电容101的与所述供电线路201电性相连的一端。区别地，对比图4A和图4B，所述供电线路201的所述覆铜面2011被设置为不同的形状。也就是说，所述供电线路201的所述覆铜面2011具有一定的面积而能够与作为所述天线回路40的参考地的所述第二铜板402等效形成所述高频等效电容101，其中所述覆铜面2011的具体形状和面积并不构成对本发明的限制，所述覆铜面2011为满足相应所述高频等效电容101的参数设置可被设置为具有不同的面积和/或形状，如扇形、方形、圆形等。
进一步地，参考本发明的说明书附图之图4C所示，依本发明的上述实施例的所述谐波抑制单元10的所述等效电感102的一种实施结构被示意，其中所述供电线路201被实施为微带线，其中至少一段所述微电线被弯折设置，以在高频的所述微波信号激励电流下，藉由所述微带线的被弯折设置的该段在高频的所述微波信号激励电流作用下等效于电感的电学特性等效形成所述等效电感102。可以理解的是，基于所述等效电感102的电感参数设置和所述微带线的材质，所述微带线的被弯折设置的该段的弯折形状和长度具有多种变形和组合，本发明对此不作限制。
值得一提的是，在本发明的这个实施例中，所述供电线路201不可避免地穿透所述屏蔽空间70，基于在屏蔽所述微波信号发生电路20而对已然产生的相应 的谐波辐射进行消耗的通用思想和方式中被忽略的，因所述微波信号激励电流中的谐波对所述微波信号发生电路20的穿透所述屏蔽空间70并具有一定长度的所述供电线路201调制作用而产生的谐波辐射，能够基于本发明的直接阻碍相应的谐波辐射的产生的思想和方式被进一步抑制。
此外，还值得一提的是，所述供电线路201部分处于所述屏蔽空间70内，则当所述供电线路201上的相应谐波辐射的产生被阻碍时，所述微波多普勒模块于所述屏蔽空间70内的谐波辐射同样得以减少，有利于降低因谐波辐射于所述屏蔽空间70的反射造成的对所述微波多普勒模块的自激干扰，从而提高所述微波多普勒模块的稳定性。
特别地，所述谐波抑制单元10优选地被设置于所述屏蔽空间70，以抑制所述微波信号激励电流中的谐波向所述屏蔽空间70之外的所述供电线路201的传导，从而限制所述微波信号激励电流中的谐波对所述屏蔽空间之外的所述供电线路201的调制作用，如此以通过直接阻碍相应的谐波辐射的产生的思想和方式，和结合目前的于所述屏蔽空间对已然产生的相应的谐波辐射进行消耗的通用思想和方式，所述微波多普勒模块的谐波辐射能够被有效地抑制。
具体地，参考本发明的说明书附图之图5A和5B所示，以5.8G频段的所述微波多普勒模块为例，基于目前的于所述屏蔽空间对已然产生的相应的谐波辐射进行消耗的通用思想和方式，和结合直接阻碍相应的谐波辐射的产生的思想和方式的两微波多普勒模块于FCC测试中对应于谐波辐射的测试结果被展示，具体地，图5A所示为依本发明的上述实施例的所述微波多普勒模块在去除相应所述谐波抑制单元10后于FCC测试中对应于谐波辐射的测试数据，图5B所示为依本发明的上述实施例的设置有相应所述谐波抑制单元10的所述微波多普勒模块于FCC测试中对应于谐波辐射的测试数据。
参考图5A，其中在去除相应所述谐波抑制单元10的所述微波多普勒模块于FCC测试的对应于谐波辐射的测试数据中，谐波辐射余量的大小对应于FCC测试的对应于谐波辐射限制标准与相应谐波辐射之差，其中，谐波辐射余量越小，相应的谐波辐射越接近于FCC测试的对应于谐波辐射限制标准，并在谐波辐射余量为负时，相应的谐波辐射超出FCC测试的对应于谐波辐射限制标准而无法通过FCC认证，也就是说，谐波辐射余量需大于零才能够满足FCC测试的对应于谐波辐射限制标准，且谐波辐射余量越大越好。而在去除相应所述谐波抑制单元10 的该所述微波多普勒模块于FCC测试的对应于谐波辐射的测试数据中，该所述微波多普勒模块的三次谐波辐射余量为0.53dB，虽然该所述微波多普勒模块的谐波辐射满足FCC测试的对应于谐波辐射限制标准，但该所述微波多普勒模块的0.53dB的三次谐波辐射余量已经接近于FCC测试的对应于谐波辐射限制标准，基于相应所述微波多普勒模块在实际生产中可允许的一定范围的误差，该所述微波多普勒模块难以批量满足FCC测试的对应于谐波辐射限制标准。
参考图5B，在设置有相应所述谐波抑制单元10的所述微波多普勒模块于FCC测试的对应于谐波辐射的测试数据中，所述微波多普勒模块的三次谐波辐射余量为8.78dB，相对于去除相应所述谐波抑制单元10的所述微波多普勒模块的0.53dB的三次谐波辐射余量而言，相应所述谐波抑制单元10的显著增大了相应所述微波多普勒模块的三次谐波辐射余量，即相应所述微波多普勒模块的谐波辐射被有效地抑制。
本领域的技术人员可以理解的是，以上实施例仅为举例，其中不同实施例的特征可以相互组合，以得到根据本发明揭露的内容很容易想到但是在附图中没有明确指出的实施方式。
本领域的技术人员应理解，上述描述及附图中所示的本发明的实施例只作为举例而并不限制本发明。本发明的目的已经完整并有效地实现。本发明的功能及结构原理已在实施例中展示和说明，在没有背离所述原理下，本发明的实施方式可以有任何变形或修改。

Claims (26)

  1. 一微波多普勒模块，其特征在于，包括：
    一微波信号发生电路，其中所述微波信号发生电路具有一供电线路，并被设置允许自所述供电线路被直流供电而产生相应频率的微波信号激励电流；
    一天线回路，其中所述天线回路与所述微波信号发生电路电性耦合，并被设置允许响应所述微波信号激励电流地发射微波波束，和接收所述微波波束被至少一物体反射而形成的相应回波；
    一混频检波单元，其中所述混频检波单元电性耦合于所述微波信号发生电路和所述天线回路，以基于多普勒效应原理输出对应于所述微波信号激励电流与所述微波波束的相应回波之间的频率差异的多普勒中频信号；以及
    至少一高频等效电容，其中所述高频等效电容的一端被电性连接于所述微波信号发生电路的所述供电线路，所述高频等效电容的另一端被接地，以维持所述供电线路在直流下的导通状态而允许所述微波信号发生电路自所述供电线路被直流供电，并藉由所述供电线路在高频的所述微波信号激励电流作用下等效于电感的电学特性与所述高频等效电容形成至少一级LC滤波网络，从而通过于所述供电线路滤除所述微波信号激励电流的相应谐波的方式，抑制所述微波信号激励电流中的相应谐波于所述供电线路的传导和辐射。
  2. 根据权利要求1所述的微波多普勒模块，其中所述高频等效电容的电容容量被设置小于等于10pF。
  3. 根据权利要求2所述的微波多普勒模块，其中所述高频等效电容的电容容量被设置小于等于2pF。
  4. 根据权利要求2所述的微波多普勒模块，其中所述微波多普勒模块包括多个所述高频等效电容，其中各所述高频等效电容的一端间隔地与所述微波信号发生电路的所述供电线路电性相连，各所述高频等效电容的另一端被接地，以形成各所述高频等效电容经至少一段所述供电线路而相互并联的电路关系。
  5. 根据权利要求4所述的微波多普勒模块，其中所述供电线路被设置为微带线，其中被设置为微带线的所述供电线路的至少一段被弯折设置，以藉由所述微带线的被弯折设置的该段在高频的所述微波信号激励电流作用下等效于电感的电学特性等效形成具有相应电感参数的一等效电感而与所述高频等效电容形成相应LC滤波网络。
  6. 根据权利要求2所述的微波多普勒模块，其中所述微波多普勒模块还包括至少一等效电感，其中所述等效电感串联或并联设置于所述供电线路，以维持所述供电线路在直流下的导通状态而允许所述微波信号发生电路自所述供电线路被直流供电，并藉由所述等效电感于所述供电线路的设置调整相应LC滤波网络的电感参数。
  7. 根据权利要求6所述的微波多普勒模块，其中所述微波多普勒模块包括两个所述等效电感和三个所述高频等效电容，其中两所述等效电感分别串联形成于所述供电线路而相互串联，其中三个所述高频等效电容的一端被两所述等电感间隔地与所述供电线路电性连接，各所述高频等效电容的另一端被接地，即三个所述高频等效电容经两个所述等效电感相互并联。
  8. 根据权利要求7所述的微波多普勒模块，其中两个所述等效电感中沿所述供电线路靠近所述微波信号发生电路的所述等效电感的电感参数，和三个所述高频等效电容中沿所述供电线路靠近所述微波信号发生电路的所述高频等效电容的电容容量被设置满足：该所述高频等效电容和该所述等效电感形成的LC滤波网络的时间常数与所述微波信号激励电流的三次谐波频率相匹配。
  9. 根据权利要求7所述的微波多普勒模块，其中两所述等效电感的电感参数矢量和，与三个所述高频等效电容中沿所述供电线路靠近所述微波信号发生电路的两个所述高频等效电容的电容容量矢量和被设置满足：该两所述高频等效电容和两所述等效电感形成的LC滤波网络的时间常数与所述微波信号激励电流的二次谐波频率相匹配。
  10. 根据权利要求7所述的微波多普勒模块，其中三个所述高频等效电容的电容 容量矢量和与两所述等效电感的电感参数矢量和被设置满足：所述高频等效电容和所述等效电感形成的LC滤波网络的时间常数与所述微波信号激励电流的基波频率相匹配。
  11. 根据权利要求6所述的微波多普勒模块，其中所述微波多普勒模块包括两个所述高频等效电容和一个所述等效电感，其中所述等效电感串联形成于所述供电线路，其中两所述高频等效电容的一端于所述等效电感的两端分别被电性连接于所述供电线路，其中两所述高频等效电容的另一端被接地。
  12. 根据权利要求6所述的微波多普勒模块，其中所述微波多普勒模块包括一个所述高频等效电容和一个所述等效电感，其中所述等效电感串联形成于所述供电线路，其中所述高频等效电容的一端于所述等效电感的其中一端被电性连接于所述供电线路，所述高频等效电容的另一端被接地。
  13. 根据权利要求6所述的微波多普勒模块，其中所述微波多普勒模块包括一个所述高频等效电容和两个所述等效电感，其中两所述等效电感分别串联形成于所述供电线路而相互串联，其中所述高频等效电容的一端于两所述等效电感之间被电性连接于所述供电线路，所述高频等效电容的另一端被接地。
  14. 根据权利要求6所述的微波多普勒模块，其中所述微波多普勒模块包括两个所述高频等效电容和两个所述等效电感，其中两所述等效电感分别串联形成于所述供电线路而相互串联，其中两所述高频等效电容的一端于其中一所述等效电感的两端分别被电性连接于所述供电线路，两所述高频等效电容的另一端被接地。
  15. 根据权利要求6所述的微波多普勒模块，其中所述微波多普勒模块包括两个所述高频等效电容和三个所述等效电感，其中三个所述等效电感分别串联形成于所述供电线路而相互串联，其中两所述高频等效电容的一端于相互串联的三个所述等效电感的中间一个所述等效电感的两端分别被电性连接于所述供电线路，其中两所述高频等效电容的另一端被接地。
  16. 根据权利要求2至15中任一所述的微波多普勒模块，其中一第一铜板和一第二铜板被间隔设置以等效形成所述天线回路，其中所述第一铜板被电性耦合于所述微波信号发生电路，所述第二铜板被接地。
  17. 根据权利要求16所述的微波多普勒模块，其中所述微波多普勒模块进一步包括一基板，其中所述第二铜板于设置有所述第一铜板的一面的相对面被覆于所述基板，其中所述微波信号发生电路被设置于所述基板的覆有所述第二铜板的一面的相对面。
  18. 根据权利要求17所述的微波多普勒模块，其中所述供电线路被实施为微带线并延伸有至少一覆铜面，以藉由所述覆铜面和所述第二铜板等效形成所述高频等效电容。
  19. 根据权利要求18所述的微波多普勒模块，其中所述覆铜面被设置为扇形。
  20. 根据权利要求18所述的微波多普勒模块，其中所述覆铜面被设置为矩形。
  21. 根据权利要求17所述的微波多普勒模块，其中所述微波多普勒模块进一步包括一屏蔽罩，其中所述屏蔽罩以罩设所述微波信号发生电路的方式被设置于所述基板的设置有所述微波信号发生电路的一面，以与所述第二铜板形成容置有所述微波信号发生电路的一屏蔽空间。
  22. 根据权利要求18所述的微波多普勒模块，其中所述微波多普勒模块进一步包括一屏蔽罩，其中所述屏蔽罩以罩设所述微波信号发生电路的方式被设置于所述基板的设置有所述微波信号发生电路的一面，以与所述第二铜板形成容置有所述微波信号发生电路的一屏蔽空间。
  23. 根据权利要求21所述的微波多普勒模块，其中所述高频等效电容于所述基板的设置有所述微波信号发生电路的一面形成于所述屏蔽空间内。
  24. 根据权利要求22所述的微波多普勒模块，其中所述覆铜面于所述基板的设置有所述微波信号发生电路的一面形成于所述屏蔽空间内。
  25. 根据权利要求2至15中任一所述的微波多普勒模块，其中所述高频等效电容被实施为微带电容、高频电容和微波电容中的一种或以上相互连接的组合。
  26. 根据权利要求6至15中任一所述的微波多普勒模块，其中所述等效电感被实施为微带线、高频电感和电阻中的一种或以上相互连接的组合。
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