2663 results about "Microstrip" patented technology

The invention discloses a microstrip MIMO antenna with a wide working frequency band and a wide decoupling frequency band, particularly relates to the technical field of microwave and millimeter wave communication, and solves the problems that most of the microstrip MIMO antenna mutual decoupling technologies in the prior art cannot be suitable for multimode broadband MIMO antennas; the technical problems that effective multi-mode mutual coupling suppression can be achieved only by additionally introducing a large-size metal structure or a stacked patch structure in a mutual coupling removal technology suitable for a multi-mode broadband MIMO antenna, and a high-integration-level planar broadband compact low-mutual-coupling MIMO antenna design scheme is lacked are solved. According to the technical scheme, on the basis of a single-layer planar microstrip antenna, a parasitic structure is loaded between two antenna units, and an antenna unit self-decoupling scheme is combined for design; the microstrip MIMO antenna is high in integration level and has a wide working frequency band and a wide decoupling frequency band at the same time.

The invention relates to the technical field of integrated circuit testing, in particular to a distance-adjustable probe connector device which comprises an impedance detection unit which comprises a connector fixing part, a connector rotating part, a single connection port, a signal probe and a grounding probe. The impedance data unit is used for determining a characteristic impedance value of the tested microstrip line based on data acquired by the signal probe and the grounding probe; the pressure detection unit is used for determining the contact pressure according to the telescopic displacement of the signal probe and the grounding probe; the control unit determines the allowable range of the contact pressure of the probes based on the line width of the microstrip line to be tested and the distance between the probes, and adjusts the angle between the grounding probe and the surface of the PCB based on the contact pressure difference between the signal probe and the grounding probe and the line width of the microstrip line. And adjusting the contact pressure of the signal probe to obtain the effective characteristic impedance value of the tested microstrip line. According to the invention, the angle and pressure of the grounding probe are intelligently adjusted, and the problem of impedance measurement drift caused by pressure imbalance of double probes is eliminated.

The invention discloses an SSPP leaky-wave antenna and a design method thereof, and belongs to the technical field of wireless communication, and the antenna comprises a dielectric substrate, and a positive microstrip line and a negative microstrip line which are correspondingly arranged on the upper surface and the lower surface of the dielectric substrate; the positive microstrip line and the negative microstrip line are respectively symmetrical about two current transmission ends; and the SSPP structure of the middle section of the positive microstrip line and the SSPP structure of the middle section of the negative microstrip line are arranged in a way that the groove openings are opposite to each other. According to the invention, high-gain signal radiation and multi-angle beam scanning can be realized.

A horizontally polarized omnidirectional multi-band antenna structure includes a substrate and two structurally-symmetric radiators, each being provided on a layout area on one of the two opposite sides of the substrate, and including a X-shaped primary microstrip line, four secondary microstrip lines, four primary stubs, four secondary stubs and four resonators. The primary microstrip line has four end points arranged with the secondary microstrip lines along different extending directions. The primary stubs extend along different directions from four sections of the primary microstrip line. Each secondary microstrip line is provided with one of the secondary stubs. Resonators are provided between four end points of the primary microstrip line and the primary stubs. The antenna structure supports WiFi 6E / WiFi 7 frequency bands including the 2 GHz, 5 GHz and 6 GHz bands, has characteristics of horizontal polarization and omnidirectionality, and effectively satisfies the needs for miniaturized multi-band and wide band antennas.

The invention discloses a directional diagram reconfigurable antenna capable of switching feed through an MEMS switch, and belongs to the field of radio frequency front-end devices. The directional diagram reconfigurable antenna is composed of a micro-strip radiation unit, a guide parasitic unit, a composite beam ohmic contact type MEMS switch, a one-to-four feed network, a direct current bias line, a test patch bonding pad, a coplanar waveguide, a gradual change micro-strip line, a dielectric substrate and a metal ground backboard. The two-stage MEMS switches are erected on the one-to-four feed network, when the two-stage switches on a certain feeder line are turned on, radio frequency current can flow to the corresponding basic radiation unit through the feeder line to generate an inclined beam facing the quadrant, and the two basic radiation units on the front side can be enabled by simultaneously turning on the four switches on the front side to generate an inclined beam facing the quadrant. And generating an inclined beam in the front side positive direction. The antenna adopts a single-layer board design, the dielectric substrate does not need to be punched, the structure is simple, manufacturing is convenient, the adopted MEMS switch is small in loss and high in isolation degree, and rapid printing and manufacturing can be achieved through the surface etching process.

The invention belongs to the field of microwave communication, and relates to a double-frequency microstrip circulator based on multi-layer material nesting, and the circulator comprises a substrate, a magnetic conductive sheet, a high dielectric ceramic, a high dielectric constant ferrite ring, a high magnetic saturation ferrite, a circuit layer, a ceramic sheet, and a permanent magnet. The magnetic conductive sheet is arranged at the bottom of the base body, the high-dielectric ceramic is arranged on the magnetic conductive sheet, the high-dielectric-constant ferrite ring is annularly embedded in the high-dielectric-constant ceramic, and the high-magnetic-saturation ferrite is embedded in the high-dielectric-constant ferrite ring. The circuit layer is arranged on the substrate consisting of the high dielectric ceramic, the high dielectric constant ferrite ring and the high magnetic saturation ferrite, the ceramic chip is arranged on the circuit layer, and the permanent magnet is arranged on the ceramic chip. The overall size is small, weight is light, and reliability is high; the working frequency range is wide, through different transformations, the system is not easily detected by enemies, the confidentiality is high, and the anti-interference capability is strong; the method can be widely applied to the fields of mobile communication, satellite communication, radar detection, electronic countermeasures and the like.

The invention discloses a Ka-band waveguide three-way power divider, which belongs to the technical field of microwave and millimeter waves, and is characterized in that a combining port is formed in the front side wall of a shielding box, and three distribution ports are formed in the rear side wall of the shielding box; a coplanar magic T equal power divider, a coplanar magic T equal power combiner, a branch waveguide unequal power divider, an L-shaped waveguide, a Z-shaped waveguide and a half waveguide-full waveguide gradual change structure are arranged in the shielding box. Wherein the coplanar magic T equal power divider comprises an E-T junction waveguide cavity, two equal branch waveguide cavities, a microstrip probe and a power resistance load, and outputs two paths of signals with equal amplitude and opposite phases; the branch waveguide unequal power divider comprises a four-branch waveguide directional coupler and an inclined-wedge-shaped waveguide matching load, and the output power ratio of a straight-through output port to a coupling output port is 2: 1. The filter has the advantages of being symmetrical in structure, good in amplitude and phase consistency, small in insertion loss, good in port standing wave and high in isolation degree.

The invention provides a K-band broadband dual circularly polarized antenna applied to the satellite internet, and belongs to the field of circularly polarized antennae, the K-band broadband dual circularly polarized antenna comprises a radiation unit, a first dielectric layer, a metal ground layer, a bonding layer, a second dielectric layer and a feed network which are stacked from top to bottom, the radiation unit comprises two first radiation patches and two second radiation patches, the first radiation patch is provided with two long rectangular grooves which are vertically intersected, the second radiation patch is provided with two short rectangular grooves which are vertically not intersected, the first radiation patch and the second radiation patch are respectively connected to the metal ground layer through metal columns, and the metal ground layer is provided with a first coupling gap and a second coupling gap. A first rectangular groove, a second rectangular groove, a third rectangular groove and a fourth rectangular groove are formed in the metal ground layer, and the feeder network comprises a first microstrip feeder and a second microstrip feeder; the antenna structure is low in profile, wide impedance bandwidth can be achieved, and the two feed ports can work in the same frequency range.

The invention provides a radio frequency chip high-frequency performance test process and a clamp. The radio frequency chip high-frequency performance test process comprises the following steps: S1, welding a crimping shaft sleeve to one end of a radio frequency cable; by adopting the scheme of combining the coaxial cable and the PCB, the PCB part can be used for digital signal transmission and product power supply, and the coaxial cable is used for radio frequency signal transmission, so that the microwave interference caused by the use of a PCB microstrip line and the signal influence caused by 90-degree switching between the conductive part and a PCB plane microstrip can be reduced, the high-frequency test requirement of a radio frequency chip is met, and the test efficiency is improved. Through the crimping mode, the problems of long welding time, high operation requirements, unmaintainability and the like in the welding process are solved, the situation that after a radio frequency cable is heated for a long time, the high-frequency test index of the clamp is affected is avoided, the independently designed elastic conductive film serves as a transmission elastic carrier of the clamp, the influence of the conductive film on the radio frequency index is reduced to the minimum, and the reliability of the clamp is improved. The fixture is suitable for double-sided chip layout, and the top of the fixture is also provided with a test assembly, so that double-sided radio frequency chip test can be realized.

An integrated circuit (IC) device includes an IC die on a substrate, and the substrate includes a group of conductive lines between a high-permittivity dielectric layer and a low-permittivity dielectric layer, with a ground plane separated from the conductive lines by either the high- or low-permittivity dielectric layer. The substrate may include other low-permittivity dielectric layers. The substrate may include other groups of conductive lines between ground planes. The high-permittivity dielectric layer may be within a low-permittivity dielectric core layer.

The invention discloses a high-gain wide-beam telemetering ground receiving antenna based on a multi-array-element structure, which comprises an antenna array, a metal floor and an array base, and is characterized in that the antenna array adopts the multi-array-element structure and comprises eight antenna units; each antenna unit comprises a parasitic layer, a micro-strip antenna layer, a feed network layer and a metal cylindrical cavity structure, the parasitic layer, the micro-strip antenna layer, the feed network layer and the metal cylindrical cavity structure are sequentially supported, assembled and connected by medium supporting columns from top to bottom, and the feed network layer adopts a branch line directional coupler in a micro-strip form. According to the high-gain wide-beam telemetering ground receiving antenna based on the multi-array-element structure, the bandwidth of the microstrip antenna is widened in a parasitic structure mode, and the impedance bandwidth of the antenna is widened by adjusting the parasitic size and height; a metal cylindrical cavity is reinforced on the bottom layer of the microstrip network so as to enhance the gain and the axial ratio of the microstrip.

The invention relates to the technical field of quantum sensing and ocean detection, and discloses an ocean magnetic field sensor based on an NV color center and an ocean magnetic field measuring method.The sensor comprises a cylindrical pressure-resistant cabin, an optical platform arranged in the pressure-resistant cabin and a main control panel; a laser, a beam shaping unit, a dichroscope, a beam shaping lens group, an objective lens, a diamond NV color center chip, a plano-convex lens I, a band-pass filter and a photoelectric detector are mounted on the optical platform; two microstrip loop antennas are mounted on the outer side of the diamond NV color center chip; an FPGA + ARM dual-core processor, a digital lock-in amplifier and two microwave signal generators are installed on the main control board, and the microwave signal generators are connected with the microstrip loop antenna and achieve electromagnetic coupling with the diamond NV color center chip. The invention has the advantages of high sensitivity, good long-term stability and strong anti-interference capability, and provides a new generation of quantum sensing solution for applications such as ocean geomagnetic monitoring and underwater target identification.

The invention discloses a metasurface filtering antenna with high out-of-band rejection. The metasurface filtering antenna comprises a first dielectric substrate, a bonding layer and a second dielectric substrate which are sequentially arranged from top to bottom, wherein the central position of the upper surface of the first dielectric substrate is provided with a metasurface structure, the metasurface structure comprises four same rectangular metal patches, and the four rectangular metal patches are arranged in a 2 * 2 array; the upper surface of the second dielectric substrate is of a defected ground structure, and a rectangular gap and four U-shaped grooves are etched in the center of the defected ground structure, wherein the four U-shaped grooves are symmetrically formed in the two sides of the rectangular gap at equal intervals; the lower surface of the second dielectric substrate is a feed structure, and the feed structure comprises a microstrip line and an I-shaped branch strip connected with the microstrip line; the first dielectric substrate and the second dielectric substrate are connected through a bonding layer. The metasurface filtering antenna can achieve good filtering and radiation performance in a millimeter wave frequency band, and meanwhile is simple in structure and low in machining difficulty, thereby being beneficial to achieving miniaturization design of a millimeter wave system.

The invention discloses a broadband reflection-free filtering antenna which is provided with a stop-band energy absorption structure, a high-low impedance microstrip line and a yagi-like radiator which are connected in sequence. The yagi-like radiator is composed of a pair of dipole arms and two pairs of bilateral parallel parasitic patches. Wherein the stop-band energy absorption structure is composed of two microstrip line band-stop filters, two grounded chip resistors, a section of folded phase line and a section of input microstrip feeder line. The two microstrip band-stop filters are respectively connected with a grounded chip resistor, and the two microstrip band-stop filters are connected through a folding phase line. The antenna is high in structural compactness, and meanwhile, the integrated design of the filter and the antenna and the ultra-wide non-reflection bandwidth are realized.

The invention discloses a suspended micro-strip high-power attenuator. The attenuator comprises a radiator, a radiating fin arranged on the bottom surface of the radiator, a mounting groove formed in the top surface of the radiator, at least two attenuation slices mounted in the mounting groove, and an elastic sheet arranged between the at least two attenuation slices and used for connecting the at least two attenuation slices in series, the first connector is arranged at the first end of the radiator and is electrically connected with the first ends of the at least two attenuation slices; and the second connector is arranged at the second end of the radiator and is electrically connected with the second ends of the at least two attenuation slices. According to the application, the attenuation slices with the attenuation circuit are connected in series through the connecting elastic sheets to obtain a required attenuation value, the radiator adopts a special structural design that the middle part is slotted, an attenuation network circuit formed by at least two attenuation slices is partially suspended, and the left side and the right side of the attenuation network circuit are clamped in the radiator mounting grooves; a part of heat of the attenuation piece is directly transmitted to the radiator for heat dissipation in a heat transmission mode, and the heat dissipation efficiency is improved.

The embodiment of the invention provides a microresonator and a preparation method of the microresonator, the microresonator can be obtained by connecting an MIM plate capacitor and an inductor of a planar coil structure, and an upper electrode, a lower electrode and the inductor of the MIM plate capacitor and a microstrip line connecting the capacitor and the inductor are all prepared from superconducting materials. A dielectric layer of the MIM plate capacitor can be prepared by adopting an ALD technology, a dielectric film grown by adopting the ALD technology is very compact and has very good thickness uniformity, a relatively high dielectric constant can be realized, and the quality factor of the microresonator can be remarkably improved by combining the zero resistance characteristic of a superconducting material; and the miniaturization of the microresonator can be realized. Moreover, in the preparation process, the three layers of thin films for forming the capacitor and the inductor are formed through deposition firstly, and then the three layers of thin films are patterned layer by layer, so that introduction of excessive impurities can be avoided, interlayer contact can be optimized, and the risk of electric leakage can be reduced.

The invention discloses a packaged antenna and an antenna array based on a three-dimensional stacking technology, belongs to the technical field of packaged antennas, and solves the problem that an existing antenna process is difficult to realize integrated packaging. The active device receives and sends radio frequency signals in an electrical connection mode, the interval height of the rewiring layers is limited within 50 micrometers, and the packaging requirement of the three-dimensional stacking technology is met. The microstrip feeder feeds signals to the antenna radiation patches in a coupled feeding mode, electrical connection is not needed, occupied space is reduced, the bandwidth of the antenna can be increased in a mode of overlapping a plurality of radiation patches, the performance of the antenna is further optimized, the space size of overall active packaging is fully utilized, the antenna and an active device are integrally packaged, and the antenna and the active device are integrally packaged. The packaging cost is reduced, the low-cost design of the packaged antenna is realized, and the packaging antenna has good application prospect and economic value.

The invention discloses a high-power fast phase inversion switch based on a p-i-n diode, and relates to the technical field of high-power microwave p-i-n diode phase shifting. The inverter switch comprises a rectangular waveguide, 2N loading linear p-i-n diode phase shift circuits which are symmetrically and uniformly arranged on a narrow-side waveguide wall, and a bias power supply which provides bias voltage for the phase shift circuits. According to the invention, the loading line type p-i-n diode phase shift circuit is inserted into the waveguide structure, so that a microwave signal is transmitted along the waveguide transmission line instead of being transmitted along the metal microstrip line, the influence of the power loss of the p-i-n diode on the insertion loss of the phase shift circuit can be reduced, and the overall insertion loss is reduced; and meanwhile, phase inversion is realized by controlling the bias state of a p-i-n diode in the phase shift circuit, and nanosecond switching speed can be realized.

The invention provides a frequency, polarization and directional diagram reconfigurable antenna unit and array. The antenna unit comprises a tuning microstrip antenna unit and a reconfigurable feed phase-shift network which are stacked, the tuning microstrip antenna unit comprises a circular radiation patch etched with a circular gap and four variable capacitance diodes bridged on the circular gap; two output ports of a Wilkinson power division network in the reconfigurable feed phase shift network are respectively connected with two feed point micro-strips through PIN diodes, and four feed points form a structure which is in space symmetry and asymmetric in impedance. The circular radiation patch and the annular radiation patch in the antenna unit have continuity in structure, only four variable capacitance diodes are loaded on the annular gap, gain fluctuation is reduced, and the antenna unit is fed through four feed points which are symmetrical in space and asymmetric in impedance, so that the antenna unit is more stable in performance. Good matching can be kept between the feed phase-shifting network and the antenna unit in a broadband range, and the tuning bandwidth of the antenna is widened.

The dual-polarized antenna comprises a first dielectric substrate, a second dielectric substrate, a third dielectric substrate, a fourth dielectric substrate, a fifth dielectric substrate and a double-feed probe, the first dielectric substrate, the second dielectric substrate and the fifth dielectric substrate are stacked, one surface of the first dielectric substrate is provided with four centrosymmetric patch units, and the surface, close to the first dielectric substrate, of the second dielectric substrate is provided with a radiation patch coaxial with the patch units. A first I-shaped gap and a second I-shaped gap which are crossed, vertical and centrosymmetric are formed in the third dielectric substrate close to the second substrate surface, a plurality of first metalized via holes are formed in the periphery, and the gaps are coaxial with the patch unit; the fourth dielectric substrate is provided with a first T-shaped microstrip feeder line and a second T-shaped microstrip feeder line which are not in contact with each other, the periphery of the fourth dielectric substrate is provided with second metalized via holes which are in one-to-one correspondence with the first via holes, and the feeder lines are respectively corresponding to the I-shaped gaps; and the double-feed probe is respectively connected with the feed points of the first T-shaped microstrip feeder and the second T-shaped microstrip feeder through feed holes. By adopting the dual-polarized antenna, the port isolation and the wide-angle scanning range can be improved.

The invention discloses a broadband circular polarization metasurface antenna with a low radar cross section. The broadband circular polarization metasurface antenna is composed of a top layer 4 * 4 antenna array, a middle layer metal ground, a bottom layer one-to-sixteen sequential rotation feed network and two dielectric plates among the three layers. The antenna array is composed of four subarrays which are arranged in a 2 * 2 period, and the four groups of subarrays are symmetrical up and down and left and right along the center of the antenna array and are arranged in a chessboard shape. Each antenna unit in the antenna array comprises a bow-tie-shaped metal patch, and the patch is connected with the output end of the feed network at the bottom layer through a first metalized through hole; the feed network is composed of three one-to-two second-order Wilkinson power dividers, four 90-degree phase shifters, twelve T-shaped power dividers and a plurality of sections of 50-ohm microstrip lines. Through fusion design of the antenna and the metasurface, the problem that in the design process of the metasurface antenna with the low radar cross section, the antenna aperture is increased due to the fact that the antenna and the metasurface are independently designed firstly and then integrated is solved, and the low radar cross section characteristic of the broadband and the high-performance circular polarization radiation characteristic are achieved.

The invention discloses a circularly polarized dielectric resonator two-dimensional beam scanning phased-array antenna based on liquid crystal, and belongs to the technical field of microwave antennas. The antenna comprises an elliptic cylindrical dielectric resonator radiation structure, a sequential rotation feed network and a liquid crystal phase shifter structure based on a glass plate, wherein the elliptic cylindrical dielectric resonator radiation structure and the sequential rotation feed network are arranged on a flexible printed circuit board (FPC); the radiation structure and the feed network which are arranged on the FPC comprise a radiation unit, an FPC layer and a feed network; the liquid crystal phase shifter comprises a glass dielectric substrate, a liquid crystal layer, an inverted spiral microstrip line and a bias network; the elliptic cylindrical dielectric resonator radiation structure realizes wide impedance bandwidth and wide axial ratio bandwidth; the antenna array also uses a sequential rotation method, the axial ratio characteristic of the phased-array antenna is further improved, and the coupling feed structure is simplified by using the design that the L-shaped microstrip line is connected with the inverted spiral microstrip line after sequential rotation.

The embodiment of the invention provides a feed network, an antenna device, an active antenna unit and communication equipment, and the feed network controls the phase state of a phase shifter through light, does not need to use a control line, enables the feed network comprising the phase shifter to adopt an inverted microstrip structure, and reduces the insertion loss between a radio frequency channel and an antenna.

The invention discloses a differential signal transmission link, a high-speed differential signal transmission composite chip and an intra-core differential signal transmission link configuration method. A strip line is arranged in a perforated cylinder in a penetrating manner, two differential microstrip lines are horizontally arranged at two ends of the perforated cylinder, one end of one differential microstrip line is connected with the upper end of the strip line, and one end of the other differential microstrip line is connected with the lower end of the strip line; the conductor strip and the two grounding strips in each differential microstrip line are arranged on the total slide glass side by side in the length direction of the total slide glass, the conductor strip is arranged between the two grounding strips, and the multiple capacitors and the multiple inductors are alternately arranged on the conductor strip in the length direction of one side of the conductor strip. The plurality of conductive blocks are uniformly arranged on the conductor belt along the length direction of the other side of the conductor belt; a high-bandwidth storage chip and a GPU chip in the high-speed differential signal transmission composite chip are horizontally arranged on a PCB composite board in parallel, and a differential signal transmission system is arranged among the PCB composite board, the high-bandwidth storage chip and the GPU chip in a penetrating mode.

The invention discloses an ultra-wideband balancer applied to high-power microwave measurement and a manufacturing method and device. The ultra-wideband balancer comprises a thick slot line layer, a microstrip line dielectric plate and a microstrip line layer, wherein the microstrip line dielectric plate and the microstrip line layer are stacked on one side of the thick slot line layer in the second direction, and the microstrip line layer is provided with an output port; the first input port and the second input port are respectively connected with an SMA connector, the phase difference of input signals of the two SMA connectors is 180 degrees, and the output port is connected with an SMA connector; a resonant cavity and a thick slot line resonator are formed between the first thick slot line structure and the second thick slot line structure, and the thick slot line resonator and the microstrip line layer form electromagnetic coupling, so that an input signal which is input by the first input port and the second input port and has a phase difference of 180 degrees is output from the output interface as an anti-phase microwave synthesis signal; the ultra-wideband balancer has larger power capacity, the problem that the power capacity is limited due to the fact that the slot line is too thin is solved, and the ultra-wideband balancer applied to high-power microwave measurement has larger power capacity.

The invention provides a frequency mixer and signal transmission equipment, and belongs to the technical field of communication. In the scheme provided by the invention, the mixer can transmit the local oscillator signal through the slot line, and transmit the first signal, the second signal and the third signal through the microstrip line. Therefore, it can be ensured that the transmission mode of the local oscillator signal is different from the transmission mode of the first signal and is different from the transmission modes of the second signal and the third signal, that is, the transmission mode isolation of the local oscillator signal from the first signal and the transmission mode isolation of the local oscillator signal from the second signal and the third signal can be realized. The transmission modes of the local oscillator signal and other signals are isolated, so that the leakage of the local oscillator signal at other signal ports can be effectively reduced, and the performance of the mixer is effectively improved.

The invention discloses a folding mark layout parameter optimization method of a deployable thin film microstrip reflective array antenna, which comprises the following steps: determining an optimization target of the thin film microstrip reflective array antenna, the optimization target comprising an inter-plate distance PD and a folding-unfolding ratio, and giving a value range of folding mark structure characteristic parameters of the reflective array antenna; establishing a thin film microstrip reflective array antenna optimization model according to a Flasher model; solving and screening the optimization model by adopting a dung beetle optimization algorithm to obtain an optimal value of the characteristic parameter; and thus, an optimal crease layout scheme is obtained. According to the invention, a film is taken as a flexible hinge of an antenna dielectric substrate, and a gap needs to be considered when the plates are folded, that is, under the condition of a determined optimization model, the distribution area of each plate is limited to be smaller than that of the original plate, so that the patch antenna is enabled to avoid a crease area.

The invention discloses a multi-mode circularly polarized OAM (orbital angular momentum) filtering antenna based on an artificial surface plasmon. According to the antenna, the SSPP leaky-wave antenna and the HMSIPW filter are integrated, so that efficient emission of multi-mode OAM beams is realized, and the antenna has low axial ratio, high gain and good directional diagram matching performance; the SSPP leaky-wave antenna is composed of an Archimedes spiral line type SSPP waveguide and annularly distributed patches, wherein the SSPP waveguide realizes accurate regulation and control of dispersion characteristics through the combination of periodic sawtooth comb lines and uniform spiral lines; the HMSIPW filter is composed of a dielectric substrate layer, a metalized through hole and a gradient rectangular structure, impedance matching of a micro-strip and double lines is achieved, insertion loss is reduced, and radiation performance is improved. Compared with a traditional design, a filtering function is integrated, higher harmonic radiation and low-purity high-mode OAM are inhibited through the overall design, and selectivity and radiation energy uniformity are improved.

The invention belongs to the technical field of high-frequency signal transfer, and particularly discloses a high-frequency signal transfer board which comprises a transfer circuit board and a connecting piece, and the connecting piece is further provided with a slot used for fixing a high-frequency connector. The switching circuit board is provided with a plurality of photosensitive board contact points, a plug hole and a high-frequency signal transmission microstrip line, the photosensitive board contact points are connected with a joint of the photosensitive board, a pin is arranged in the plug hole and used for connecting the high-frequency connector and the high-frequency signal transmission microstrip line, the other end of the high-frequency signal transmission microstrip line is connected with the photosensitive board contact points, and the other end of the high-frequency signal transmission microstrip line is connected with the photosensitive board contact points. The bottom of the pin is clamped with the high-frequency connector, and the side wall of the pin is in interference fit with the plugging hole. According to the invention, the switching circuit board is fixedly connected with the connecting piece, and the plugging hole with the circular truncated cone structure is formed in the switching circuit board, so that reliable connection between the pin and the plugging hole is ensured, and as the high-frequency signal transmission microstrip line is connected with the high-frequency connector in a plugging manner, echo is avoided, and the signal switching precision is improved.

The invention discloses a microwave sensor for measuring liquid, which comprises a microwave circuit and a liquid container, and is characterized in that the microwave circuit comprises a dielectric substrate, and a top layer metal and a bottom layer metal which are arranged on two side surfaces of the dielectric substrate; the top layer metal comprises a 50-ohm microstrip line used for feeding and a resonator used for generating a transmission zero point and a transmission pole point, and the resonator and the 50-ohm microstrip line form a coupling structure. The invention further discloses a measuring method of the microwave sensor for measuring the liquid. According to the invention, the detection process of the microwave sensor is simpler and more efficient, the microwave sensor is convenient to carry and operate, and the manufacturing and measuring cost of the microwave sensor can be further reduced. Besides, when the sensor is used for testing, liquid quantitative control is facilitated, instrument calibration only needs to be carried out once, system errors can be reduced to a great extent in cooperation with a pseudo-differential scheme during data processing, and the sensor has high robustness.