129 results about "Microstrip transmission line" patented technology

A packaged RF transistor amplifier includes an RF transistor amplifier die having a first terminal, a first lead, an integrated passive device that includes a first series microstrip transmission line, a first bond wire coupled between the first terminal and the first series microstrip transmission line, and a second bond wire coupled between the first series microstrip transmission line and the first lead.

The invention belongs to the technical field of communication, and particularly relates to an ultra-wideband miniaturized Vivaldi antenna. The antenna comprises a dielectric substrate, wherein the upper surface of the dielectric substrate comprises a main body Vivaldi antenna, four resistors, two rectangular metal patches and an artificial surface plasma, wherein the main body Vivaldi antenna is provided with an exponential gradually-changed slot; a feed network is arranged on the lower surface and comprises six impedance conversion microstrip transmission lines, a fan-shaped transmission line and a circular groove; the main body antenna and the dielectric substrate are placed in a centered alignment manner, the four resistors are placed at the tail end of the main body antenna, and the rear sides of the resistors are connected with the two rectangular patches; the artificial surface plasma is placed in the main body antenna gradual change gap; and the multi-section impedance transformer and the microstrip-to-slot line structure of the feed network are aligned with the circular slot of the main body antenna. According to the invention, the ultra wide band, miniaturization and high radiation gain are realized by designing the main body antenna, slotting the edge, loading the resistor, carrying out the artificial surface plasma and the like. The working frequency band of the antenna ranges from 0.2 GHz to 18 GHz, and the antenna has the characteristic of miniaturization.

The invention relates to the technical field of millimeter wave conversion, and discloses a millimeter wave microstrip conversion structure of a double-ridge waveguide, and the structure comprises a double-ridge waveguide port which is used for transmitting a millimeter wave signal from a waveguide structure to a lambda / 4 single-section impedance transformer; the microstrip transmission line is used for receiving and transmitting the millimeter wave signal; the lambda / 4 single-section impedance transformer is used for transition from the impedance of the double-ridge waveguide port to the impedance of the microstrip transmission line; and the capacitance compensation structure is arranged between the lambda / 4 single-section impedance transformer and the microstrip transmission line so as to compensate step capacitance caused by electric field distribution difference of different transmission lines. By means of the lambda / 4 single-section impedance transformer, balance transition of impedance in space can be achieved by means of the phase characteristic of electromagnetic waves in a quarter-wavelength structure, the return effect of reflected waves is effectively weakened, it is ensured that impedance matching of signals in high-frequency transmission is more accurate by optimizing the impedance value and the length parameter, and the signal transmission efficiency is improved. The loss of transmission energy is reduced, and the signal stability is improved.

The invention provides a low-profile circularly polarized antenna unit for slot coupling feed and an array thereof, and the antenna unit employs a plurality of metal layers which are coaxially arranged, are sequentially stacked up and down and are separated through dielectric layers, thereby achieving the high integration of a feed network, a coupling structure and a radiation unit in the vertical direction of the antenna unit. Specifically, the parasitic patch and the radiation patch which are stacked and coupled up and down are adopted, so that the working bandwidth of the antenna unit is expanded; furthermore, the interference of a feed network on the radiation performance of the antenna is reduced through the separation of the upper metal ground and the lower metal ground, and meanwhile, two orthogonally distributed gap structures formed in the upper metal ground are matched with the microstrip transmission line to perform coupling feed, so that the circular polarization performance of the antenna unit is improved; in addition, periodically arranged metallized shielding through holes are formed in the edges of the antenna units, so that surface wave propagation and electromagnetic coupling between the units are effectively inhibited, and the performance stability of the antenna unit during large-angle scanning is improved while the low-profile characteristic of the antenna unit is ensured.

The invention discloses a complementary split ring type antenna sensor for noninvasive blood glucose multi-frequency detection. The complementary split ring type antenna sensor comprises a metal radiation layer, a dielectric layer and a microstrip transmission line, the invention provides a detection method based on a microwave detection (MDT) principle, and the detection method comprises the following steps of: firstly, carrying out a microwave detection (MDT) on the basis of the microwave detection (MDT) principle; the device has the advantages of noninvasive property, high penetrating power, real-time continuous monitoring and the like. According to the present invention, by using a complementary split ring (CSRR) structure, the size design of the antenna sensor is significantly reduced, and a plurality of different resonance modes are successfully excited. A multi-frequency detection mode is adopted, and the robustness and sensitivity of blood glucose concentration detection are improved. The antenna sensor is compact in structure, simple in manufacturing process and low in cost, and has high application value in the field of medical detection. The antenna sensor provided by the invention can monitor the blood glucose concentration in real time, and has the capability of resisting environmental interference (pressure deformation).

The invention belongs to the crossing field of a microwave technology and a sensing technology, and particularly relates to a microwave dielectric parameter measurement sensor based on a micro-flow pipeline embedded in a substrate, and one surface of the substrate is provided with a microstrip transmission line and a resonant structure; the microstrip transmission line is used for exciting and transmitting microwave signals; the resonant structure is used for enhancing electromagnetic field distribution in a certain area of the substrate; a micro-flow pipeline is embedded in the substrate and is used for accurately conveying a substance to be detected to an area where electromagnetic energy is most concentrated; a grounding layer is arranged on one side of the substrate and used for restraining an electromagnetic field, and energy of the electromagnetic field is mainly concentrated in the substrate. The micro-flow pipeline is embedded in a strong electric field area in the substrate, so that a to-be-measured substance directly interacts with an electromagnetic energy concentration area, and dielectric parameter measurement which is compact in structure, high in sensitivity and high in precision is achieved. The sensor provided by the invention has wide application prospects in the fields of biomedical detection, chemical analysis, environmental monitoring, industrial process control and the like.

The embodiment of the invention provides a microstrip-to-waveguide device and a radar level meter. When the microstrip-to-waveguide device is designed, two antenna units can be arranged in the waveguide cavity of the waveguide structure, and two microstrip transmission lines used for feeding the two antenna units can extend into the waveguide cavity through different microstrip ports arranged on the waveguide cavity and feed the antenna units connected with the microstrip transmission lines respectively. Therefore, the two microstrip transmission lines can be isolated, and the isolation degree of signals transmitted by the two antenna units is improved. Furthermore, a resonance probe can be arranged in the waveguide cavity, and the isolation degree of signals transmitted by the two antenna units is improved through the resonance characteristic of the resonance probe. Through the structural design, components such as a power divider or a hybrid ring do not need to be introduced into a circuit, so that the whole microstrip-to-waveguide device is simpler in structure, good in isolation degree and suitable for equipment such as a radar level meter which requires a radio frequency module to be small in size.

The present invention relates to the field of wireless communication technologies, and provides a microstrip dual-path coupled resonator filter. The microstrip dual-path coupled resonator filter includes a metal layer, a silicon substrate stacked on the metal layer, and a filter structure stacked on the silicon substrate; the filter structure passes through the silicon substrate and is electrically connected to the metal layer; the filter structure includes two microstrip transmission lines stacked and fixed on the silicon substrate and oppositely arranged along a first direction, two open-circuit microstrip resonators, a short-circuit resonator, and a tightly coupled feeding structure; the two microstrip transmission lines and the two open-circuit microstrip resonators are arranged in an interleaved manner, and the open-circuit microstrip resonators and the short-circuit resonator are spaced from the two microstrip transmission lines respectively; each microstrip transmission line is configured with two tightly coupled feeding structures, and the other ends of the two tightly coupled feeding structures are respectively connected to the two open-circuit microstrip resonators. The microstrip dual-path coupled resonator filter of the present invention has high integration and reliability.

The invention relates to an electromagnetic sensor based on a split-ring resonator array and a crack detection method, the sensor comprises a first flexible dielectric substrate, a bonding layer, a second flexible dielectric substrate and a metal grounding layer which are bonded from top to bottom, and the top surface of the first flexible dielectric substrate is provided with a microstrip transmission line; one end of the first flexible dielectric substrate is provided with an SMA interface hole, and the bottom surface of the first flexible dielectric substrate is provided with a split-ring resonator array which is in electromagnetic coupling with the microstrip transmission line. The invention also provides a crack detection method of the sensor. The electromagnetic sensor is adjustable in detection area and uniform in field distribution.

The present invention discloses a non-magnetic simultaneous transmit and receive (STAR) duplexer for terahertz communication and sensing integration, which includes a dielectric substrate, a microstrip stepped impedance filter, varactor diodes, terahertz signal input / output ports, modulation signal input ports, ground ports, and a Y-shaped microstrip transmission line connection. Through the design of distributed parameter circuits, the present invention overcomes the problem of mismatch of the non-magnetic STAR duplexer with lumped parameter circuits at high frequencies. The main structure of the present invention is composed of a microstrip circuit. The ports connecting the external modulation signal and the ground port include lumped element filters. The overall structure is simple and easy to process and integrate.

The invention discloses a high-selectivity broadband cavity band-pass filter for low-orbit satellite communication and a manufacturing method, particularly relates to the technical field of communication, and solves the problems that in the prior art, due to the fact that periodic metal strips are loaded on a micro-strip transmission line and a substrate integrated waveguide, the structural loss is large; a periodic unit is loaded in a metal waveguide to form the characteristics that the lower stop band of the artificial surface plasmon is poor in selectivity and the metal waveguide is not flexible enough; and existing metal waveguide artificial surface plasmon polaritons cannot effectively achieve the purpose that the upper stop band is wide enough. According to the technical scheme, on the basis of an artificial surface plasmon polariton band-pass filter with an inverted-T-shaped groove etched in a center ridge, a pair of symmetrical folding groove structures is etched to form a 1 / 4 wavelength resonator, the 1 / 4 wavelength resonator is used for generating a zero point in a lower stop band, the selectivity of the band-pass filter is improved, and meanwhile the wide stop band characteristic is achieved by controlling the length of a grating; according to the invention, the loss is lower, and a wider stop band is realized.

The invention discloses a miniaturized tunable three-dimensional antenna which comprises a distributed large capacitor structure, a magnetic ferrite material loading coil structure and a tunable feed circuit board. The distributed large-capacitance structure comprises multiple layers of metal plates which are embedded and arranged in a laminated manner along the vertical direction; in the magnetic ferrite material loading coil structure, one end of a coil is connected with a top metal plate of the distributed large capacitor structure. The tunable feed circuit board comprises a plurality of microstrip transmission lines, and each microstrip transmission line is provided with a disconnection part used for arranging an adjustable capacitor / inductor or a switching device. The distributed large-capacitance structure is connected with one microstrip transmission line through one metal column; in the magnetic ferrite material loading coil structure, the other end of the coil is connected with the other microstrip transmission line. The antenna provided by the invention can give consideration to a larger bandwidth through the tuning circuit, allows the antenna to adjust the working frequency within a certain frequency range, and has a very strong anti-interference capability.

The application provides a YIG film-based adaptive on-chip filter and a design method thereof.The filter comprises a YIG film-loaded four-port transducing structure, a terminal matching network and a front-end matching network, the YIG film-loaded four-port transducing structure is composed of two parallel microstrip transmission lines and a YIG film covering the two parallel microstrip transmission lines, the two ends of the parallel microstrip transmission lines are the ports of the YIG film-loaded four-port transducing structure, the YIG film is used for converting electromagnetic waves into static magnetic surface waves, the terminal matching network is connected with two diagonal ports of the YIG film-loaded four-port transducing structure respectively, and the front-end matching network is connected with the other two diagonal ports of the YIG film-loaded four-port transducing structure, namely an input port and an output port.Through the terminal matching design and the front-end impedance matching network design, the application significantly reduces the insertion loss of the device under a low-power signal.

The invention provides a multi-scale round-square nested fractal antenna applied to wings of an unmanned aerial vehicle. The multi-scale round-square nested fractal antenna comprises a substrate, the grounding layer is arranged on the lower surface of the substrate; the feed structure is arranged at one end of the upper surface of the substrate and comprises an input feed line, a micro-strip transmission line and a chip resistor connected with the input end of the feed line and the micro-strip transmission line; the radiation structure is arranged at one end, far away from the feed structure, of the upper surface of the substrate and comprises a radiation patch; the transmission structure is arranged on the upper surface of the substrate, is used for connecting the feed structure and the radiation structure, and comprises an impedance transition transmission line; the microstrip transmission line is of a geometric gradual change type, the radiation patch is of a multi-scale fractal topology formed by nesting circular contours and square contours, the circular contours and the square contours are sequentially arranged in a nesting mode according to preset intervals and form multi-stage self-similar boundaries, the impedance transition transmission line is in a periodical bending shape, and the line widths of all the parts are consistent. The fractal antenna solves the problem that in the prior art, a fractal antenna which is compact in structure, high in radiation efficiency and suitable for wing embedded installation does not exist.

The invention discloses a miniaturized multi-channel power divider applied to a low frequency band, which comprises a total port matching transmission line, at least two groups of sub-port matching transmission lines and corresponding sub-port isolation networks, and is characterized in that the total port matching transmission line is connected with each sub-port matching transmission line through a microstrip transmission line and a T-shaped transmission line; the tail ends of the branch port matching transmission lines are connected with the branch port isolation networks, the tail ends of all the branch port isolation networks are communicated with one another, and the working frequency range is 32.5 MHz to 37.5 MHz. The lumped elements and the microstrip lines are matched to optimize the impedance characteristic, the size is only 1 / 10 of that of a conventional power divider, and the problem that the size of a low-frequency-band power divider is too large is solved; and meanwhile, the multi-path power divider has low insertion loss, high port isolation and good phase consistency, can realize multi-path power distribution by adjusting the number of branches, is adaptive to the compact radio frequency module requirements of portable and embedded equipment, and is suitable for scenes such as private network communication, Internet of Things, aviation communication and the like.

The invention discloses an adjustable low-pass filter circuit which comprises two first defected ground structures, two second defected ground structures, two first additional defected ground structures and two second additional defected ground structures which are symmetrically distributed relative to an X axis and are sequentially etched along the Y axis at the position, under a micro-strip transmission line, on a ground plane, and the two first defected ground structures, the two second defected ground structures, the two first additional defected ground structures and the two second additional defected ground structures are symmetrically distributed relative to the X axis. The first defected ground structure is connected with the first direct current bias circuit, and the second defected ground structure is connected with the second direct current bias circuit; variable capacitance diodes are inserted into the first defected ground structure and the second defected ground structure, the sizes of introduced equivalent capacitance and equivalent inductance are changed by changing the sizes of the defected ground structures and the additional defected ground structures, the transmission characteristics of the microstrip transmission line are changed, and the transmission characteristics of the microstrip transmission line are changed by changing the bias voltage of the direct-current bias circuit. The equivalent capacitance of the variable capacitance diode is changed, and the cut-off frequency of the low-pass filter circuit is tuned; the filter has the advantages that high selectivity of the filter is guaranteed, and meanwhile high stopband suppression is taken into consideration.

The invention discloses a terahertz directional diagram reconfigurable antenna based on an RF-MEMS switch, and belongs to the technical field of terahertz radio frequency front-end devices. The antenna is composed of a radiation unit, a composite beam ohmic contact type MEMS switch, a coplanar waveguide feed structure, a microstrip transmission line, a dielectric substrate and a metal ground backboard. The antenna adopts a single-layer quartz glass substrate integrated waveguide (SIW) feed structure, excellent impedance matching with a microstrip transmission line is realized, the relative bandwidth exceeds 19%, and an MEMS switch is driven to act through direct current bias. The antenna has a relatively wide impedance bandwidth. Reconfiguration of a directional diagram is controlled through on-off of a switch, the antenna achieves-40-degree, 0-degree and + 40-degree three-beam directional switching in the 00 mode, the 01 mode and the 10 mode, the main lobe widths in the three modes are 55.61 degrees, 58.94 degrees and 98.56 degrees respectively, and wide-angle-domain coverage is supported.

The invention discloses an antenna feed device and method. The device comprises a coaxial transmitter, a microstrip transmission line, a dielectric substrate and a connecting structure. And a probe of the coaxial transmitter is in contact with the microstrip transmission line. The microstrip transmission line is etched on the dielectric substrate. A gap exists between the end face of the outer conductor of the coaxial transmitter and the dielectric substrate in the axial direction of the probe. And the connecting structure is connected with the dielectric substrate and the coaxial transmitter and is used for providing impedance matching for transmission of the probe and the microstrip transmission line. According to the invention, the problem of stray capacitance caused by difficulty in guaranteeing the processing and assembling consistency of microstrip transmission line signal transmission in a large-scale antenna array through coaxial probe feeding is solved, and the feasibility and practicability in practical application are improved.

This invention discloses a broadband frequency-shifting conformal transmission method for electromagnetic waves based on a time-varying circuit with dual constitutive parameters, belonging to the fields of microwave radio frequency, time metamaterials, and frequency domain transformation technology. The method is implemented using a frequency-shifting transmission circuit, which includes a microstrip transmission line and a periodically loaded inductor branch. The inductor branch includes switches, series inductors, and parallel inductors. When all switches in the frequency-shifting transmission circuit are open, an input pulse signal is sent to the circuit. When the pulse signal has fully entered the microstrip transmission line, all switches close simultaneously. Due to the wavenumber conservation of the microstrip transmission line, frequency shift occurs, achieving frequency-shifting transmission. This method does not rely on a complex local oscillator system, does not increase circuit complexity excessively, and theoretically does not generate harmonics. It achieves broadband frequency shifting, reflection-free, high-efficiency transmission, and waveform distortion-free conformal transmission, providing a new technical path for broadband, low-distortion signal processing in the microwave radio frequency field.

The present application relates to a metal crack detection device and method based on an open resonator slow-wave structure. The device includes a dielectric substrate, a microstrip transmission line, and a resonant unit group. The resonant unit group includes a plurality of resonant units periodically interwoven and distributed on both sides of the central axis of the dielectric substrate. The resonant unit group is used to excite its own resonance in a coupling manner through the plurality of resonant units and generate a uniform magnetic field of a slow-wave structure to generate a passband. The metal crack detection device uses a plurality of resonant units periodically interwoven and distributed on both sides of the central axis of the dielectric substrate to achieve the ability to adjust the coverage area of the metal crack detection device to meet demand and to detect metal cracks in a larger range. During the electromagnetic wave transmission process, the individual resonant units in the resonant unit group are excited by magnetic field coupling to generate a slow-wave structure and a relatively uniform magnetic field. This makes the metal crack detection device insensitive to the location of the metal crack in metal crack detection applications and has a high sensitivity.

The present invention discloses a method and system for constructing a multifunctional adaptive directional backtracking Doppler stealth cloak. Specifically, the method comprises: constructing a 2-bit phase shifter based on a reconfigurable microstrip transmission line, adjusting the length of the microstrip transmission line so that the phase shifter achieves four discrete phase states; analyzing the generalized conjugate relationship between the receiving phase and the radiating phase of the array elements in the antenna array, constructing a reconfigurable Van Atta array model based on the 2-bit phase shifter, and achieving adaptive directional backtracking in the four discrete phase states; introducing time modulation into the reconfigurable Van Atta array model to achieve Doppler frequency compensation for the adaptive directional backtracking, thereby obtaining a Doppler cloak; and introducing spatial modulation into the reconfigurable Van Atta array model to achieve radar cross-section (RCS) reduction during the adaptive directional backtracking, thereby obtaining a multifunctional Doppler stealth cloak. This method can significantly improve the efficiency of the multifunctional adaptive directional control of the Doppler stealth cloak.

The invention relates to the technical field of anti-interference receiving, and discloses a tunable high-temperature superconducting amplitude limiter based on voltage regulation. Comprising a radio-frequency signal input end P1, a first impedance conversion node assembly, a superconducting amplitude limiting node L4, a direct-current bias regulation and control circuit for introducing bias current to the superconducting amplitude limiting node L4, a second impedance conversion node assembly and a radio-frequency signal output end P2 which are electrically connected in sequence, the first impedance conversion node assembly and the second impedance conversion node assembly are the same in structure, and each of the first impedance conversion node assembly and the second impedance conversion node assembly comprises a superconducting microstrip transmission line, a blocking capacitor and an impedance conversion node, on the premise that geometric structure parameters of the high-temperature superconducting amplitude limiting section are not changed, the working current density of the high-temperature superconducting amplitude limiting section can be changed within the range close to or away from the critical current density of the superconducting material by adjusting the magnitude of the bias current, and therefore tuning of the amplitude limiting threshold value and the power bearing capacity of the amplitude limiter is achieved.

An embodiment of the present application provides a microstrip-to-waveguide device and a radar level gauge. When designing the microstrip-to-waveguide device, two antenna units can be arranged in the waveguide cavity of the waveguide structure. Two microstrip transmission lines for feeding the two antenna units can extend into the waveguide cavity through different microstrip ports arranged on the waveguide cavity and feed the antenna units connected thereto respectively, so that the two microstrip transmission lines can be isolated, and the isolation degree of the signals transmitted by the two antenna units can be improved. Further, a resonant probe can also be arranged in the waveguide cavity, and the isolation degree of the signals transmitted by the two antenna units can be improved through the resonant characteristics of the resonant probe. Through the above structural design, there is no need to introduce components such as a power divider or a hybrid ring into the circuit, making the structure of the entire microstrip-to-waveguide device simpler and having better isolation degree, which is suitable for devices such as radar level gauges that require a smaller volume of the RF module.

The invention discloses a microstrip transmission line crosstalk suppression structure based on a periodic function bending track, a microstrip transmission line periodic function bending track design method and a circuit board. The microstrip transmission line crosstalk suppression structure comprises a first microstrip transmission line and a second microstrip transmission line which are arranged on a dielectric substrate. The center line of the first microstrip transmission line extends along the periodic function curve track, and the periodic function track is one or more complete cycles; the center line of the second microstrip transmission line and the center line of the first microstrip transmission line form an equidistant curve layout. The periodic function curve track is a sine function curve track or a cosine function curve track. According to the microstrip transmission line crosstalk suppression structure based on the periodic function bending track, an extra shielding layer or a complex element does not need to be added, high-performance signal isolation can be achieved only through geometrical shape regulation and control, and the microstrip transmission line crosstalk suppression structure is suitable for high-density integrated circuit design of a millimeter wave frequency band.

An apparatus of a spiral resonator material detector, the apparatus comprising: a planar dielectric substrate; a microstrip transmission line on a first surface of the planar dielectric substrate; a spiral resonator on the first surface of the planar dielectric substrate electrically connected to the microstrip transmission line; and a ground conductor on a second surface of the planar dielectric substrate beneath the microstrip transmission line, wherein the planar dielectric substrate insulates the ground conductor from the microstrip transmission line and the spiral resonator.

The application relates to a linearly polarized in-band co-polarized scattering reconfigurable array antenna, which comprises antenna modules arranged in an array by a plurality of same antenna units. Each antenna unit adopts a multi-layer stacked structure: from top to bottom, a radiation patch, a first dielectric substrate, a metal patch, a second dielectric substrate, a metal ground plate and a third dielectric substrate are sequentially arranged. A plurality of metalized through holes are arranged on the center line of the first dielectric substrate, and the metalized through holes, the metal patch and the metal ground plate jointly form a resonator. Each unit is also integrated with a reflective phase shifter, which comprises a microstrip transmission line, a feeding metal column, a metal short circuit column and a varactor diode. The feeding metal column penetrates through the layers and is connected with the radiation patch, and the metal short circuit column is connected with the metal ground plate. The varactor diode receives external control through a direct current bias line, the reflection phase of the unit is adjusted by changing the bias voltage, and the in-band co-polarized scattering reconfigurable function of the antenna is realized. The device can realize flexible regulation and control of a wide range and low coupling of scattering characteristics while maintaining high stable radiation characteristics.

The utility model relates to a high-performance low-pass and dual-passband filter, which comprises a first resonator, an LC microstrip transmission line and a second resonator, two ends of the LC microstrip transmission line are respectively connected with a first resonator and a second resonator; and the first resonator and the second resonator are symmetrically arranged relative to the middle part of the LC microstrip transmission line. The filter has the advantages that through the compact and unique structural layout of the folding coupling line and the L-shaped branch line, the first resonator realizes the characteristics of low pass and first band pass, and the first resonator, the microstrip transmission line and the second resonator are combined to realize the characteristics of low pass and double passbands, so that resonant frequencies of 1.04 GHz, 1.92 GHz and 2.9 GHz are obtained, and finally three ideal passbands are formed; meanwhile, the two-port resonator structure avoids a complex coupling loop, and the overall design is remarkably simplified; according to the method for cascading the same resonators and the L-shaped branch lines, the overall performance and reliability of the filter are effectively improved, and the filter can reach a higher performance standard in practical application.

The invention relates to the technical field of millimeter wave communication, in particular to a waveguide-microstrip probe transition structure integrated with a filtering function, which comprises a resonance unit, a microstrip probe, a dielectric substrate, an impedance conversion line, a microstrip transmission line, a grounding layer and a waveguide cavity, the resonance unit is used for generating a transmission zero signal, the microstrip probe is used for coupling the transmission zero signal, the impedance conversion line and the microstrip transmission line are used for leading out a coupling signal generated by the microstrip probe, and the dielectric substrate is used for carrying the resonance unit, the microstrip probe, the impedance conversion line and the microstrip transmission line; and the grounding layer is arranged on the back surface of the dielectric substrate and is connected with the waveguide cavity. The second resonance unit and the third resonance unit are designed to cooperatively generate a transmission zero point to form a transmission passband, and the first resonance unit is further designed to deepen the transmission zero point of an upper stop band so as to realize better filtering performance.

The invention relates to the technical field of wireless communication, and provides a microstrip two-way coupling resonant filter which comprises a metal layer, a silicon substrate stacked on the metal layer and a filter structure stacked on the silicon substrate. The filter structure passes through the silicon substrate and is electrically connected with the metal layer; the filter structure comprises two microstrip transmission lines, two open-circuit microstrip resonators, a short-circuit resonator and a tight coupling feed structure, wherein the two microstrip transmission lines are stacked and fixed on a silicon substrate and are oppositely arranged along a first direction; the two microstrip transmission lines and the two open-circuit microstrip resonators are arranged in a staggered manner, and the open-circuit microstrip resonators and the short-circuit resonators are spaced from the two microstrip transmission lines respectively; each microstrip transmission line is provided with two tight coupling feed structures, and the other ends of the two tight coupling feed structures are respectively connected with the two open-circuit microstrip resonators. The microstrip dual-path coupling resonant filter has high integration and reliability.