54 results about "Microstrip filter" patented technology

The invention relates to the technical field of microwave ferrite devices, and discloses a double-section microstrip circulator which comprises a magnetic conductive sheet, a ferrite gyromagnet and a resistor, the ferrite gyromagnet and the resistor are arranged on the upper surface of the magnetic conductive sheet, a circuit is additionally arranged on the upper surface of the ferrite gyromagnet, and the circuit is connected with a microstrip filter; the ceramic chip is arranged on the upper surface of the circuit, and samarium cobalt is additionally arranged at the top end of the ceramic chip, according to the two-section microstrip circulator, through the arrangement of a combined structure of the magnetic conductive sheet, the ferrite gyromagnet, the circuit, the microstrip filter, the ceramic chip, the samarium cobalt and the resistor, the isolation degree can be effectively improved, and the requirement of a system for high isolation is met; the microstrip filter in circuit connection can improve the second harmonic characteristic and improve the problem that the second harmonic of a conventional microstrip circulator is poor; the ferrite gyromagnet is used as a gyromagnet material, and is combined with a double-section circuit, so that the characteristic of low emission loss can be realized, and the circulator is small in size, light in weight and relatively high in reliability due to the integral structural design.

A microstrip filter, comprising: a first substrate (11) and a second substrate (12) arranged opposite to each other, and a dielectric layer (13) located between the first substrate (11) and the second substrate (12). The first substrate (11) comprises: a first base (110), and a patch array provided on the side of the first base (110) close to the dielectric layer (13). The second substrate (12) comprises: a second base (120), a microstrip line (121) provided on the side of the second base (120) close to the dielectric layer (13), and a grounding layer (122) provided on the side of the second base (120) away from the microstrip line (121). The microstrip line (121) comprises: a major transmission line (1211) and at least one stub (1212), the orthographic projection of the stub (1212) of the microstrip line (121) and the orthographic projection of the patch array on the first base (110) overlapping each other. The dielectric layer (13) is configured to regulate the resonant frequency between the patch array and the microstrip line (121) when a voltage is applied to patches (111) in the patch array.

A differential feed dual-frequency dual-polarization microstrip filtering antenna comprises three layers of dielectric substrates which are arranged at intervals from top to bottom, and an octagonal annular coupling parasitic structure is loaded on the lower surface of the first layer of dielectric substrate; a rectangular radiation patch is printed on the upper surface of the second dielectric substrate and is loaded with four non-closed rectangular gaps which are distributed in a square shape and are mutually rotationally symmetrical. A cross-shaped parasitic branch knot and four L-shaped symmetrical open-circuit branch knots which are distributed in a rhombus shape and extend outwards along the diagonal direction of the rhombus are printed on the lower surface of the second dielectric substrate layer; the lower surface of the third dielectric substrate is a metal floor; the second layer of dielectric substrate and the third layer of dielectric substrate are connected through a coaxial feeder line; according to the dual-frequency dual-polarization filtering antenna, the mode of combining the differential feed technology and the microstrip antenna is adopted, the design of the dual-frequency dual-polarization filtering antenna with four radiation zero points is achieved, the antenna has good edge selectivity and good out-of-band rejection capacity, in-band gain is stable, and a directional diagram has good symmetry and directionality.

The invention provides a cross coupling microstrip filtering oscillator antenna and an array thereof, and belongs to the field of large phased array radar systems.The cross coupling microstrip filtering oscillator antenna comprises an antenna feed port, a reflecting plate, a suspended cross coupling microstrip circuit board, a filter cover plate and metal oscillator arms, the filter cover plate is located on the upper surface of the reflecting plate, and a suspended air cavity is defined by the filter cover plate and the reflecting plate; the suspended cross-coupled microstrip circuit board is located in the suspended air cavity, an inner conductor of the antenna feed port extends into the suspended air cavity to be connected with the suspended cross-coupled microstrip circuit board, an outer conductor of the antenna feed port is connected with the reflecting plate, and the metal oscillator arm is located on the filter cover plate. One radiation arm in the metal oscillator arms is connected with the suspended cross-coupled microstrip circuit board, and the other radiation arm is grounded; the radiation characteristic is directly realized on the filter cover plate, and a wider working bandwidth is realized under the conditions that the lower sideband of the suspended broadband high-pass filter is high in suppression, the original filtering performance of the filter is not changed and the profile height is basically kept, so that the problem of interference of an auxiliary radar on a main radar is solved.

The invention belongs to the technical field of microwave filter design, and particularly relates to a microstrip filter of a CQ frequency-variable coupling structure and a design method of the microstrip filter. The method comprises the following steps: firstly, according to required filter indexes, such as order, center frequency, bandwidth, return loss and transmission zero position, solving a transverse matrix M of a filter by utilizing a filter comprehensive theory; then performing similarity transformation and scaling transformation on the transverse matrix to eliminate unnecessary coupling terms in the transverse matrix so as to obtain a filter topological structure and a frequency-dependent coupling matrix M'which are easier to implement; a quarter-wavelength short-circuit stepped impedance resonator is selected as a resonance unit of the micro-strip filter simulation model; finally, relevant coupling parameters of the micro-strip filter simulation model are made to approach the theoretical coupling coefficient by adjusting relevant physical structure parameters of the resonator, and then design is completed. By introducing a frequency-dependent coupling mechanism into the structure, the position of a transmission zero point is flexible and controllable, and the spectrum selectivity and the out-of-band rejection capability of the filter can be effectively improved.

The invention relates to a high-power microwave amplitude limiting protection circuit with high power capacity, and belongs to the field of strong electromagnetic pulse protection. The three-level PIN pair transistor amplitude limiting circuit and the eight-order hairpin type microstrip filter circuit are carried on the dielectric substrate, the first blocking capacitor is connected between the input end of the amplitude limiting protection circuit and the three-level PIN pair transistor amplitude limiting circuit, and the second blocking capacitor is connected between the three-level PIN pair transistor amplitude limiting circuit and the eight-order hairpin type microstrip filter circuit. The output end of the amplitude limiting protection circuit is connected with the eight-order hairpin type microstrip filter circuit. The invention has the advantages of large power capacity, small peak leakage, small starting limit level and low amplitude limiting level, can effectively suppress interference signals coupled into the receiving end of the wireless communication equipment by high-power microwaves, and improves the anti-interference capability of the wireless communication equipment under the radiation of the high-power microwaves.

The invention provides a design method of a broadband high-suppression miniaturized microstrip filter, relates to the technical field of microstrip filter design, and realizes comprehensive optimization of the performance of the microstrip filter from theoretical calculation to simulation verification to multi-target scoring screening by constructing a systematic optimization process. According to the scheme, on the basis of meeting impedance matching, the compactness is improved through the bending design, and the miniaturization effect is remarkable; meanwhile, through optimization of insertion loss and enhancement of out-of-band signal suppression, the performance of the filter is improved. In addition, according to the scheme, the final design with excellent performance and good manufacturability is screened out in combination with the processing cost factor, and the manufacturing difficulty and cost are remarkably reduced. On the whole, the scheme solves the problem that the performance and the cost are difficult to balance in the prior art, and has wide practical value and reliability.

The invention discloses a band-pass filter and electronic equipment with the same, and relates to the technical field of microstrip filters. The band-pass filter comprises a dielectric substrate, a signal input end, a resonator array and a signal output end, the signal input end, the resonator array and the signal output end are sequentially arranged in the front area of the dielectric substrate, the signal input end and the signal output end are symmetrical about the center of the filter, and a grounding metal layer is arranged in the back area of the dielectric substrate; the signal input end comprises a signal input line and two first branch lines which form an included angle, and the lengths of the first branch lines are not equal; the resonator array comprises n + 1 resonators which are obliquely distributed, and n represents the order of the filter, is an integer and is greater than or equal to 1; the signal output end comprises a signal output line and two second branch lines which form an included angle, and the lengths of the second branch lines are not equal. By adopting the band-pass filter, the frequency selection characteristic is good, a plurality of transmission zeros can be provided at a low-end stop band and a high-end stop band, and the out-of-band rejection capability is effectively improved.

The invention discloses a dual-passband filter with all adjustable center frequency and bandwidth, and aims to provide a band-pass filter with low loss and wide tuning range. According to the technical scheme, each part comprises an input port, an output port, a coupled feeder line, a quarter-wavelength resonator with a variable capacitance diode loaded at the tail end, and a branch resonator with a variable capacitance diode loaded. According to the structure, a coupling line connected with a source and a load is adopted to feed a resonator in a slot coupling mode, the capacitance value of a variable capacitance diode is changed, and finally, the bandwidth and the center frequency are tunable. According to simulation verification, the center frequency of a high pass band of the all-tunable filter disclosed by the invention is continuously adjustable within 2.39-2.61 GHz, and at the moment, the center frequency of a low pass band is kept unchanged at 1.61 GHz and the bandwidth of 120 MHz; the center frequency of the low pass band is continuously adjustable within 1.45 GHz-1. 8GHz, and the center frequency of the high pass band is kept unchanged at 2.51 GHz and the bandwidth of 107MHz; the bandwidth of the high pass band is tunable in the range of 83-132MHz, the insertion loss fluctuates in the range of 1.16-1.45 dB, and at the moment, the center frequency of 1.6 GHz and the bandwidth of 122MHz of the low pass band are kept unchanged. The result shows that the microstrip filter with the tunable center frequency and bandwidth has the advantages of low loss, wide tuning range and wide application range.

Printed microstrip filter. A printed film radio frequency microstrip bandpass filter includes: a plurality of resonators disposed on a dielectric substrate; a first input / output (I / O) interface and a second I / O interface connected to corresponding first and second resonators located on the sides of one or more intermediate resonators. The opposite ends of the one or more intermediate resonators are connected to a ground plane on the opposite side of the substrate via corresponding wires. The intermediate resonators have an electrical wavelength that is half the wavelength of the filter's center frequency, and the first and second resonators may have an electrical wavelength that is nominally half the wavelength of the bandpass filter's center frequency.

The invention provides a multi-band radio frequency power real-time monitoring device which comprises a broadband antenna, a radio frequency amplifier, a power divider, a microstrip filter, a power detector and an acquisition processor. The radio-frequency amplifier comprises a broadband matching circuit and a low-noise amplifier and is used for amplifying radio-frequency signals received by the broadband antenna, and the power divider is used for dividing output signals of the radio-frequency amplifier into N equal parts and respectively sending the N equal parts into the microstrip filters with filtering characteristics of different frequency bands, the power detector converts an output signal of the microstrip filter into a voltage signal, outputs the voltage signal to the acquisition processor for sampling and quantification, and calculates the average power in each frequency band within a specified time. The device can quickly acquire the power information of each frequency band of the radio frequency signal, has the characteristics of good real-time performance and high accuracy, and can monitor the non-single-frequency complex radio frequency signal in real time.

The invention provides a third harmonic suppression film microstrip filter based on a mixed structure. Comprising a substrate, a pair of coplanar waveguide feeder lines used for being connected with an external circuit and playing a role in impedance matching, and a plurality of interdigital resonators used for generating passband characteristics of the filter, the hairpin resonator is used for generating a transmission zero point at the low end of the filter to improve low-end stop-band suppression, the 1 / 4 wavelength open-circuit lines are used for suppressing third harmonics of the filter, and the pair of coplanar waveguide feeder lines, the interdigital resonators, the hairpin resonator and the 1 / 4 wavelength open-circuit lines are all laid on the substrate. The plurality of interdigital resonators are located between the pair of coplanar waveguide feeders, the hairpin resonator is located between the plurality of interdigital resonators, the pair of coplanar waveguide feeders is connected with the interdigital resonators at two sides of the plurality of interdigital resonators, and the plurality of 1 / 4 wavelength open-circuit lines are connected with the pair of coplanar waveguide feeders in parallel.

The invention relates to the technical field of microwave circuits, and discloses a stacked high-pass filter, which comprises a first filter circuit, a first through hole, a second filter circuit, a second through hole and an interconnection layer, and is characterized in that the first filter circuit and the second filter circuit are connected through the interconnection layer; the first through hole penetrates through the first filter circuit and is connected with the interconnection layer, and the second through hole penetrates through the second filter circuit and is connected with the interconnection layer; the dielectric constant of the first filter circuit is larger than a first preset value, the dielectric constant of the second filter circuit is smaller than a second preset value, and the first preset value is larger than the second preset value. The stacked high-pass filter provided by the invention has the characteristics of miniaturization, high suppression, ultra wide band and the like, realizes double-layer wiring high-pass filter circuit topology in a form of stacking the first filter substrate and the second filter substrate, and has the structural advantages of miniaturization and low cost of a microstrip filter and the performance advantages of high suppression and ultra wide band of a suspended line filter.

The present invention relates to a method for designing a frequency reconfigurable filter antenna, including: establishing a microstrip filter antenna model, performing mode analysis on the microstrip filter antenna, and obtaining the mode curve characteristics of the microstrip filter antenna; setting a parasitic patch on the microstrip filter antenna; performing characteristic mode analysis on the microstrip filter antenna with the parasitic patch, analyzing all modes, and modifying the structure of the antenna according to its mode current for modes that do not conform to the microstrip filter antenna; analyzing the distribution characteristics of all mode currents, adding an excitation structure, and finally simulating and optimizing the antenna structure. The present invention uses characteristic mode theory to realize the display of the potential radiation capability of the radiator within any frequency domain, so as to facilitate finding and utilizing the required mode, and changing the influence of the unnecessary mode according to its mode current; the present invention uses characteristic mode theory to guide the selection of antenna feed, and reduces the workload in the antenna design process.

This invention discloses a cross-shaped microstrip filter, belonging to the field of microwave RF passive device technology. The filter includes a dielectric substrate, an input microstrip line, an output microstrip line, two sets of series-arm resonant units, and two sets of parallel-arm resonant units. The series-arm resonant units are composed of microstrip inductors and interdigital capacitors connected in series, with the resonant frequency corresponding to the filter's center frequency. The parallel-arm resonant units are composed of microstrip inductors and surface-mount capacitors connected in series, generating low-frequency and high-frequency transmission zeros respectively. The four sets of resonant units converge at a common node to form a cross-shaped topology. This invention, through a modular cross-shaped architecture, allows direct mapping between the resonant units and the frequency response, simplifying debugging and increasing design efficiency. Modular cascading can achieve high-order filtering, significantly improving band-edge steepness and stopband suppression, making it suitable for microwave RF systems such as communication, radar, and satellite navigation.

The small-size high-bandwidth thin film microstrip filter comprises a long-strip-shaped substrate and a resonator group arranged on the substrate, a line connecting the midpoints of the long sides of the substrate on both sides forms a center line, the resonator group comprises 2n resonators symmetrically distributed along the center line, n is an even number, a first cross-sawtooth structure forming a capacitive coupling is arranged between the nth-m resonator and the nth-m+1 resonator, a second cross-sawtooth structure forming a capacitive coupling is arranged between the nth resonator and the nth+1 resonator, m is an odd number smaller than n, the cross-sawtooth structure can be used to increase the coupling area and improve the coupling amount without changing the size of the thin film microstrip filter, so that the bandwidth requirement is met, the nth-s resonator and the nth-s+1 resonator are connected through a connecting rib, s is an even number smaller than n, and the inductive coupling formed by the connecting rib can also be used to eliminate the parasitic zero point formed on the far end side of the passband, so that the electrical performance is improved.

The utility model belongs to the technical field of filter structures, and particularly relates to a KU-frequency-band low-loss microstrip filter structure design which comprises a machine body and a prompting mechanism, the two ends of the machine body are fixedly connected with connector assemblies, the prompting mechanism is arranged on the connector assemblies, the prompting mechanism comprises an outer cylinder detachably connected to the connector assemblies, and the outer cylinder is arranged on the machine body. The inner side of the outer cylinder is rotationally connected with an inner cylinder, an observation opening is formed in the end, close to the inner cylinder, of the outer cylinder, and a prompt mark is arranged on the surface of the end, close to the outer cylinder, of the inner cylinder. According to the utility model, the inner cylinder and the outer cylinder can move relatively when the joint assembly and the connector are loosened, so that a maintainer can judge whether the joint assembly and the connector are loosened by observing whether a prompt sign is exposed in the observation port or not; and relative rotation between the connector assembly and the connector can be hindered through friction between the outer barrel and the inner barrel, and the loosening situation is reduced.

This invention relates to the field of microwave ferrite device technology and discloses a dual-section microstrip circulator, comprising: a magnetic sheet, and a ferrite gyromagnet and a resistor disposed on the upper surface of the magnetic sheet, wherein a circuit is added to the upper surface of the ferrite gyromagnet, and the circuit is connected to a microstrip filter; a ceramic sheet disposed on the upper surface of the circuit, and a samarium cobalt is added to the top of the ceramic sheet. This dual-section microstrip circulator, through the combined structure of the magnetic sheet, ferrite gyromagnet, circuit, microstrip filter, ceramic sheet, samarium cobalt, and resistor, can effectively improve isolation and meet the system's high isolation requirements; the microstrip filter connected to the circuit can improve the second harmonic characteristics, improving the problem of poor second harmonic characteristics in conventional microstrip circulators; the ferrite gyromagnet, as a gyromagnetic material, combined with the dual-section circuit design, helps to achieve low transmission loss characteristics; the overall structural design makes the circulator small in size and light in weight, and has high reliability.

The utility model aims to provide a microstrip filtering phase shifter. The microstrip filtering phase shifter comprises a main line and a reference line which are arranged on a dielectric substrate. The main wire comprises a metal wire I, a metal wire II, a metal wire III, a metal wire IV and a metal wire V; one end of the metal wire I is connected with the Port1 port, the other end of the metal wire I is connected with one end of the metal wire II, the metal wire II is coupled with the left section of the metal wire III, the right section of the metal wire III is coupled with the metal wire IV, one end of the metal wire V is connected with the Port2 port, and the other end of the metal wire V is connected with the metal wire IV; the reference line is arranged above the main line, and two ends of the reference line are respectively connected with the Port 3 port and the Port 4 port. According to the utility model, a filtering function characteristic and a phase shift function characteristic are integrated on one device, miniaturization is realized, and the advantages of wide bandwidth, low insertion loss and small phase deviation are realized.

The present application relates to the technical fields of microwave circuit, and discloses a stacked high-pass filter, which comprises a first filter circuit, a first via, a second filter circuit, a second via and an interconnection layer, the first filter circuit and the second filter circuit are connected through the interconnection layer, the first via penetrates the first filter circuit and is connected with the interconnection layer, the second via penetrates the second filter circuit and is connected with the interconnection layer, the dielectric constant of the first filter circuit is greater than a first preset value, the dielectric constant of the second filter circuit is less than a second preset value, and the first preset value is greater than the second preset value.The stacked high-pass filter has the characteristics of miniaturization, high suppression and ultra-wideband, and realizes the high-pass filter circuit topology of double-layer wiring in the form of stacking the first filter substrate and the second filter substrate, and has the structural advantages of miniaturization and low cost of the microstrip filter and the performance advantages of high suppression and ultra-wideband of the suspended line filter.

The invention relates to the technical field of reconfigurable filters, in particular to an order and frequency independent reconfigurable radio frequency microstrip filter based on an SIR, a band-pass filter of which the center frequency and the order can be independently adjusted is designed based on an asymmetric structure of the SIR, and a variable capacitance diode and an adjustable coupling structure are designed and loaded by analyzing the coupling structure; then, a coupling structure of the feed and the input / output resonator is adjusted, such as tap feed, slot feed and feed position, in addition, adjustment can be carried out by changing the capacitance value of the variable capacitance diode, so that a proper external quality factor value is obtained, and the feed design is completed; and finally, through continuous simulation optimization of electromagnetic simulation software such as electromagnetic simulation software and circuit simulation software, the design of the radio frequency microstrip filter with independently reconfigurable order and frequency based on the SIR is realized.

The invention belongs to the field of thin film microstrip filters, and particularly relates to a miniaturized ultra-wideband planar filter. According to the invention, the bridge employs a compact branch structure, the length and spacing of the branch are optimized according to the electromagnetic coupling characteristics of the 3.1-10.6 GHz frequency band, and the matching conditions of the characteristic impedance, the resonator and the dielectric substrate are strictly satisfied; the planar coupling path of the bridge is further combined with the three-dimensional coupling of the gold wire to form a'planar + three-dimensional 'composite coupling mechanism, and by matching with the miniaturized configuration of the microstrip resonator, the overall size of the device is reduced by more than 30%, the group delay is greatly reduced (from 0.68 ns traditionally to 0.33 ns at 8.3 GHz), the coupling value between the resonators is remarkably improved, and finally, the ultra-wideband coverage is realized. And in-band interference signals can be effectively suppressed. The problems that in the prior art, traditional bridge coupling only depends on a plane structure, the coupling path is single, coupling value improvement is limited, and bandwidth and miniaturization are difficult to consider at the same time are effectively solved.

The application discloses a four-mode reconfigurable microstrip line filter integrated with reflection-free and multi-zero-point response, which adopts a single microstrip circuit topology with left-right symmetry and is composed of an upper branch band-pass filter circuit, a T-shaped joint structure, a pair of cross-shaped absorption branches, a pair of coupled line absorption branches, five groups of switch pairs and input and output ports; the coupled lines at the two ends of the upper branch band-pass filter circuit are connected with the ground through the switch pair connection ports and the T-shaped joint structure, and the absorption branches are connected with the ports in parallel through the switches; the four-mode switching of double-band rejection, full-band reflection-free band-pass, full-band reflection-free band-stop and multi-transmission zero-point band-stop is realized in the same circuit through the on-off control of the switches; the integration degree is improved; the reflection-free characteristic of the band-stop energy dissipation is realized by relying on the resistance-loaded absorption branches; the frequency selectivity and the band-stop suppression capability are strengthened in combination with the multi-transmission zero points; and the problems of low resource reuse rate, lack of reflection-free characteristic and uneven multi-mode performance of the traditional structure are solved.

The antenna comprises a lower dielectric plate, a metal floor, an upper dielectric plate, a feed network located on the lower surface of the lower dielectric plate and a radiation network located on the upper surface of the upper dielectric plate which are sequentially arranged from bottom to top. The radiation network is of an axisymmetric structure and comprises a main patch, two slave patches and two Z-shaped microstrip branches; the metal floor is provided with a strip-shaped floor coupling gap. The strip-shaped floor coupling slot is positioned right below the main patch; the feed network comprises a main feed line and an open-circuit branch. And the feed network excites the upper-layer radiation network through the strip-shaped floor coupling gap on the floor. Good third-order resonance response can be obtained by adjusting the length of the open circuit branch knot and the length of the Z-shaped microstrip branch knot, and high roll-off radiation zero points are formed at the edges of the two sides of the passband.

A microstrip filter includes a first substrate (11) and a second substrate (12) disposed oppositely, and a dielectric layer (13) disposed between the first substrate (11) and the second substrate (12). The first substrate (11) includes a first base substrate (110) and a patch array disposed on a side of the first base substrate (110) close to the dielectric layer (13). The second substrate (12) includes a second base substrate (120), a microstrip line (121) disposed on a side of the second base substrate (120) close to the dielectric layer (13), and a ground layer (122) disposed on a side of the second base substrate (120) away from the microstrip line (121). The microstrip line (121) includes a main transmission line (1211) and at least one branch (1212). An orthographic projection of the branch (1212) of the microstrip line (121) on the first base substrate overlaps with an orthographic projection of the patch array on the first base substrate (110), and the dielectric layer (13) is configured to adjust a resonant frequency between the patch array and the microstrip line (121) when a voltage is applied to the patch (111) of the patch array.

A microstrip filter comprises a first substrate (11), a second substrate (12) and a dielectric layer (13), wherein the first substrate (11) and the second substrate (12) are oppositely arranged, and the dielectric layer (13) is located between the first substrate (11) and the second substrate (12). The first substrate (11) comprises a first substrate (110) and a patch array arranged on the side, close to the dielectric layer (13), of the first substrate (110). The second substrate (12) comprises a second substrate (120), a microstrip line (121) arranged on the side, close to the dielectric layer (13), of the second substrate (120), and a grounding layer (122) arranged on the side, away from the microstrip line (121), of the second substrate (120). The microstrip line (121) comprises a main transmission line (1211) and at least one branch knot (1212). The orthographic projection of the branch knot (1212) of the microstrip line (121) and the orthographic projection of the patch array on the first substrate (110) are overlapped, and the dielectric layer (13) is configured to adjust the resonant frequency between the patch array and the microstrip line (121) when the patch (111) of the patch array is applied with voltage.

The invention discloses a microstrip filter, and relates to the technical field of passive electronic devices, the microstrip filter comprises a dielectric substrate, a feeder line, a resonance unit, a metal layer and a metal through hole, the feeder line is arranged on the dielectric substrate, and the feeder line comprises an input feeder line and an output feeder line; the resonant unit is arranged on the dielectric substrate, the input feeder line is connected with one end of the resonant unit, the other end of the resonant unit is connected with the output feeder line, the resonant unit comprises a plurality of resonators, the resonators are in coupling connection, each resonator comprises a plurality of edges, and the edges are sequentially connected to form an open ring shape; the metal layer and the dielectric substrate are oppositely arranged and have the same area; the metal through hole is arranged on the resonator and penetrates from the resonator to the metal layer. The microstrip filter provided by the invention has a very good space utilization rate, and various different coupling modes can be generated through different arrangements among the resonators, so that different transmission zeros are generated, and the out-of-band rejection capability of the filter is improved.

This application discloses a dual-polarization radio frequency transceiver system and its package structure, including: a power amplifier chip, a limiting amplifier chip, a circulator, a switching chip, a first microstrip filter stub, and a second microstrip filter stub. In the transmit state, the circulator is used to unidirectionally transmit the radio frequency signal input to the power amplifier chip to the switching chip. The switching chip can switch the transmission path of the radio frequency signal so that the radio frequency signal is processed by the first microstrip filter stub or the second microstrip filter stub before being output. In the receive state, the circulator is used to unidirectionally transmit the radio frequency signal input to the first microstrip filter stub or the second microstrip filter stub after passing through the switching chip to the limiting amplifier chip before being output. This invention realizes the switching between horizontal and vertical polarization channels through the switching chip, and improves the second harmonic suppression ratio by utilizing the first and second microstrip filter stubs. The system is integrated into a miniaturized package structure and has good heat dissipation.

The present invention discloses a microstrip filter, microwave circuit, and antenna, comprising an upper microstrip board, a prepreg, and a lower microstrip board. The prepreg is positioned between the upper and lower microstrip boards, and the lower microstrip board is connected to a ground plane. A first microstrip transmission line is provided on the upper layer of the upper microstrip board, and a second microstrip transmission line is provided on the lower layer of the upper microstrip board. The first microstrip transmission line is in a "X" shape, and the second microstrip transmission line is in a "T" shape. The first and second microstrip transmission lines overlap, and the first and second microstrip transmission lines are connected by a metalized blind via. The designed microstrip filter is compact, has low loss, and is easy to integrate.

The application provides a cross-coupled microstrip filter vibrator antenna and an array thereof, and belongs to the field of large phased array radar systems, and comprises an antenna feed port, a reflector plate, a suspended cross-coupled microstrip circuit board, a filter cover plate and metal vibrator arms. The filter cover plate is located on the upper surface of the reflector plate and forms a suspended air cavity together with the reflector plate. The suspended cross-coupled microstrip circuit board is located in the suspended air cavity. The inner conductor of the antenna feed port extends into the suspended air cavity and is connected with the suspended cross-coupled microstrip circuit board. The outer conductor is connected with the reflector plate. The metal vibrator arms are located on the filter cover plate. One of the metal vibrator arms is connected with the suspended cross-coupled microstrip circuit board, and the other is grounded. The radiation characteristics are realized directly on the filter cover plate. The suspended broadband high-pass filter is used to realize high suppression of the lower sideband. The original filtering performance of the filter is not changed, the profile height is basically maintained, a wider working bandwidth is realized, and the interference problem of a secondary radar on a primary radar is solved.