292 results about "Microstrip circuits" patented technology

A radio frequency antenna arrangement comprising an array of radiating elements, such as radiating antenna patches, which are co-located in a circuit, such as a microstrip circuit, with feeder elements which couple electromagnetic radiation to the radiating elements. The antenna arrangement has an electrically conductive backplate located behind the circuit, which acts as a groundplane and which is separated from the circuit by a dielectric layer. To reduce electromagnetic interference from the feeder elements which could disrupt the antenna pattern an electrically conductive screen is located directly in front of the feeder elements of the circuit but selectively exposes the array of radiating elements. The screen is spaced from the feeder elements and is not electrically connected to the backplate so that the screen, feeder elements and backplate do not form a triplate structure.

The invention relates to a one-point short-circuit circularly polarized antenna with a low-profile cavity-backed annular slot. The existing cavity-backed circularly polarized antenna based on one-point short-circuit of the annular slot has complex structure, large volume, inability to planar integration, and high cost. In the present invention, a metal layer is plated on both sides of the dielectric substrate, and the upper metal layer is etched with a microstrip line for power feeding and a common ground coplanar waveguide transmission line, and the middle metal strip of the coplanar waveguide transmission line extends outwards as a microstrip line . Through the upper metal layer, the dielectric substrate and the lower metal layer, a plurality of metallized through holes arranged in a circle are opened to form a cavity, and the coplanar waveguide transmission line extends into the cavity. The lower metal layer is etched with a circular radiation slit with a short circuit in the area corresponding to the cavity. Compared with the conventional cavity-backed circularly polarized antenna composed of a metal cavity, the present invention is manufactured by common PCB technology, has low manufacturing cost, can be seamlessly integrated with a microstrip circuit, and improves system integration.

The present invention provides a composite substrate type microstrip circulator. The composite substrate type microstrip circulator comprises a ferrite-dielectric substrate composed of a ferrite substrate and a dielectric substrate; a through hole is formed in the dielectric substrate; the ferrite substrate is fixed in the through hole in the dielectric substrate; the upper and lower surface of the ferrite-dielectric substrate are plated with metal layers; the upper surface of the ferrite-dielectric substrate is provided with a microstrip circuit; the lower surface of the ferrite-dielectric substrate is provided with a continuous metal layer; an annular junction region microstrip circuit in the microstrip circuit is disposed on the ferrite substrate; a matching microstrip circuit in the microstrip circuit is disposed on the dielectric substrate; a ceramic spacer and a permanent capacitor are disposed above the microstrip circuit; and the ferrite-dielectric substrate is fixed on a metalbase. Compared with a traditional full-ferrite substrate type microstrip circulator, the composite substrate type microstrip circulator has the advantages of small size and low consumption, and is applicable to surface mounted and highly integrated microwave circuits.

The invention discloses a microstrip waveguide double-probe transition structure applicable to a millimeter-wave frequency multiplier. The structure includes an upper cavity, a lower cavity and a microstrip circuit. The lower cavity is covered with the upper cavity in a sealing way so that a rectangular waveguide cavity and a microstrip circuit shielding cavity are formed. The microstrip circuit is fixed in the microstrip-circuit shielding cavity. The microstrip circuit includes two microstrip probes, a power distribution/synthesis circuit and a dielectric substrate. The two microstrip probes and the power distribution / synthesis circuit are arranged on the same surface of the dielectric substrate. The two microstrip probes are connected with the two ends of the power distribution / synthesis circuit respectively. A distance between the center line of one microstrip probe and a rectangular-waveguide short-circuit face is 1/4 of a waveguide wavelength of an objective frequency and a distance between the center line of the other microstrip probe and the rectangular-waveguide short-circuit face is 5/4 of the waveguide wavelength of the objective frequency. The microstrip waveguide double-probe transition structure is capable of realizing same-phase superposition of an objective frequency signal and reversed-phase offset and output inhibition of a non-objective-frequency signal. The transition structure is simple in structure, convenient to manufacture and low in price.

The present invention discloses an antenna array installed on a printed circuit board, which comprises two antenna units, each being a microstrip directly installed on two symmetric ends of a T-shape microstrip on a printed circuit board and an asymmetric end of the T-shape microstrip circuit being a feeding end feeding signals simultaneously to the two antenna units. A grounding metal surface is fabricated on the other side of the printed circuit board at a position other than the antenna unit, and keeps a specific distance from at least one corresponding edge of the antenna unit. Since the antenna units are symmetric in shape and have the same feeding end, the radiation direction thereof is shifted towards the two symmetric edges to broaden the range of the use of two symmetric edges.

Ultrathin intelligent antenna in use for time-division system includes feeding net, printed vibrator, calibration net, reflecting plate, and antenna outer cover. Characters are that the printed vibrators welded to the feeding net composed of microstrip circuit vertically constitute antenna array fixed on the reflecting plate. Through cable, antenna array connected to the calibration net constitutes main body of antenna. Connection cable for antenna array and calibration net is coaxial cable with SMA adaptor at two ends. There is certain proportional relation between distance from array to array and wavelength. The invention solves issue of unstable antenna performance existed for long time. Features are: lowering thickness of antenna, raising consistency and mechanical properties of antenna produced.

The invention discloses a method for testing the performance of a semiconductor microwave power chip packaging shell, belonging to the field of methods for testing the performance of a semiconductor microwave power chip packaging shell. A ceramic dielectric substrate microstrip circuit, a PCB (Printed Circuit Board) microstrip line and a microwave test fixture are manufactured, a microwave test module, a DC offset module and the microwave test fixture cooperate with each other to perform microwave performance test on the PCB microstrip line, the ceramic dielectric substrate microstrip circuit and the target packaging shell and a combination thereof, and the test results are processed to obtain the microwave performance parameters of the target packaging shell. With the simple method, the microwave performance test of the packaging shell is realized, the manufacturing cost of the packaging shell is reduced, the test efficiency of the packaging shell is improved, precious data is accumulated for expressing the characteristics of the packaging shell, and a reliable guaranty is provided for improving the performance of a semiconductor microwave power device. In the test method provided by the invention, the use environment of the packaging shell is simulated, and the accuracy of the test results is increased.

The invention discloses a GNSS (Global Navigation Satellite System) high-precision measuring antenna, which comprises a reflecting cavity and a choke coil distributed on the periphery of the reflecting cavity; four centrosymmetrical feed oscillators are arranged in the reflecting cavity, and the necks of each two opposite feed oscillators are connected through a connecting plate; a microstrip feed cavity is arranged under the reflecting cavity, a microstrip circuit is arranged in the microstrip feed cavity, and the feed oscillators are electrically connected with the microstrip circuit in the microstrip feed cavity located under the reflecting cavity through internal conductors. Since the microstrip circuit is arranged in the microstrip feed cavity located under the reflecting cavity and the feed oscillators located in the reflecting cavity are electrically connected with the microstrip circuit located in the microstrip feed cavity through the internal conductors, electromagnetic interference is effectively reduced, and thereby the purity of feed signals is increased; moreover, since the GNSS high-precision measuring antenna adopts a broadband radiating unit composed of the four centrosymmetrical feed oscillators, a plurality of navigation satellite signals within a frequency band from 1.1GHz to 1.6GHz are fully covered, and thereby the operating frequency band of the receiving antenna is broadened.

A radio for use in microwave datalink applications in which a common local oscillator is used for both a final radio frequency (RF) up-converter stage and an initial RF down converter stage. The frequency of the common local oscillator corresponds to an integer multiple of a local oscillator needed for an earlier up-converter or later down converter stage. The circuit can be used to provide a radio frequency carrier in a 30 GHz band using Coaxial Resonator Oscillators (CRO's) that lend themselves to a planar microstrip circuit implementation.

The invention discloses a miniaturized phase shifting equalizer based on a Wilkinson power divider. The miniaturized phase shifting equalizer comprises a microstrip circuit layer, a medium layer and a metal stratum which are sequentially overlaid from the top to the bottom, wherein the microstrip circuit layer comprises an unequal Wilkinson power divider, a microstrip phase shifting line, an unequal Wilkinson power combiner and a matched microstrip connecting line; the unequal Wilkinson power divider and the unequal Wilkinson power combiner are connected with the matched microstrip connecting line through the microstrip phase shifting line. The miniaturized phase shifting equalizer has the advantages of simple structure, small size, large equilibrium quantity, novel structure and good standing wave property.

The invention discloses a wave guide and microstrip line convertor and power divider of a vertical structure based on slit coupling. The power divider comprises the following parts which are successively arranged from bottom to up: a waveguide tube, a first metal earth plate with an opening having the same shape as the waveguide tube, a first dielectric slab, a second metal earth plate with an opening having the same shape as the waveguide tube, a third metal earth plate and a second dielectric slab. A surface facing to the waveguide tube of the first dielectric slab is attached with a frequency regulating unit; two microstrip lines are arranged above the second dielectric slab in parallel, and two rectangular slits used for electromagnetic energy coupling are etched on the third metal earth plate; the peripheries of the first dielectric slab, the first metal earth plate and the second metal earth plate are provided with metal through holes which are evenly distributed along a side line of the waveguide tube mouth. The power divider has simple structure and little volume and can be conveniently integrated in the structures needing wave guide for feeding, such as a microstrip circuit system; in addition, the invention adopts a vertical structure, which allows the design to be more flexible and more convenient.

The invention discloses a monopole antenna array generating vortex electromagnetic waves and a feed system of the antenna array, and belongs to the technical field of wireless communication. The monopole antenna array comprises a dielectric substrate, a grounding surface, a feed system and a monopole array antenna body. The dielectric substrate is circular and insulated, a microstrip circuit printed by a metal material is arranged on the dielectric substrate, the microstrip circuit mainly comprises the 1-to-N path feed system and the monopole array antenna body including N array elements, and 1/4 wavelength metal patches serves as the array elements. According to the invention, a vortex electromagnetic wave generating antenna of a planar structure and small in size and easy to produce and integrate is realized. The complete feed system is designed to solve the feed problems of the array antenna, a required OAM mode can be obtained by only applying excitation to an input port, operation is convenient, and use is simple.

The invention provides an E-band waveguide E-T branch and multi-probe coupling structure power synthesis amplifier. A two-stage cascaded waveguide E-T branch is used to realize the division of an input E-band millimeter wave signal into four paths of signals transmitted in a waveguide, the four paths of signals are converted from a waveguide transmission mode to a four-path microstrip transmissionmode via a waveguide multi-probe transition structure, a power distribution structure converts a signal inputted by a rectangular waveguide into 16 paths of signals of the same amplitude and phase with a transmission and the microstrip circuit, the signals are subjected to power amplification, the 16 paths of microstrip transmission mode signals which are subjected to power amplification are synthesized to be one path of high-power millimeter wave signal through the waveguide multi-probe transition structure and a waveguide E-T branch structure and the signal is outputted out of the waveguide, the multiple-path high-efficiency power synthesis amplification of a millimeter wave power synthesis amplifier is achieved, and the high-power output of an E-band signal is achieved.

The invention relates to a polarized antenna with wave guiding cavity-backed lines integrated on a rectangular substrate. The traditional polarized antenna has the disadvantages of low performance of single radiation unit, large bulk, complex structure and high manufacturing cost. The dielectric substrate of the invention is plated with metallic layers on two sides; the upper metallic layer is etched with a microstrip line for feeding and a plurality of coplanar wave guiding transmission lines; the coplanar wave guiding transmission lines are grounded coplanar wave guiding structure, wherein, the metallic strip in the middle is extended outwards to form the microstrip line. A plurality of metallized through holes, which are arrayed as a square, are penetrated through the upper metallic layer, the medium substrate and the lower metallic layer to form the cavity; the coplanar wave guiding transmission lines are extended into the cavity. An elongated radiation slit is etched on the lower metallic layer corresponding to the cavity. The invention has the advantages that: by adopting the general PCB technology, the production cost is notablely decreased and the invention can be integrated with the microstrip circuit without seam, the integrity of the system is improved; compared with the exact machining of the traditional cavity-backed antennas, the manufacture speed is high and the cost is low.

The invention relates to a unijunction microstrip circulator or microstrip isolator with a magnetic shielding case and belongs to the technical field of magnetic materials and devices. The unijunction microstrip circulator or microstrip isolator with the magnetic shielding case comprises a soft magnetic alloy bottom plate and a ferrite substrate positioned on the soft magnetic alloy bottom plate, wherein the upper surface of the ferrite substrate is provided with a junction circulation microstrip circuit, and the lower surface of the ferrite substrate is provided with a grounding metal layer. The geometric center of the junction circulation microstrip circuit is provided with a permanent magnet which is provided with the magnetic shielding case, a first dielectric substrate is arranged between the permanent magnet and the junction circulation microstrip circuit, and a second dielectric substrate is arranged between the permanent magnet and the magnetic shielding case. The magnetic shielding case is formed by bending the edge of a soft magnetic flat plate material downwards, the smallest horizontal enclosure dimension is larger than the diameter of the permanent magnet and smaller than the side length of the ferrite substrate, and the bottom of the edge of the magnetic shielding case does not contact with the ferrite substrate. The unijunction microstrip circulator or microstrip isolator with the magnetic shielding case has a good magnetic shielding function, and is simple in structure, stable in performance, convenient to produce and debug and capable of meeting application needs of increasing miniaturization and high integration.

The invention provides a planar microstrip duplexer. The planar microstrip duplexer comprises a microstrip circuit and a double-surface copper-clad dielectric plate, the front surface of the double-surface copper-clad dielectric plate is provided with the microstrip circuit, the backside of the double-surface copper-clad dielectric plate is provided with a copper-clad grounding plate, the microstrip circuit comprises an input terminal T-type joint, a high-pass filter, a low-pass filter and two output ports, the high-pass filter and the low-pass filter are both microstrip stub structures, one ends the high-pass filter and the low-pass filter are connected to the input terminal T-type joint in parallel through quarter-impedance conversion lines, the other ends of the high-pass filter and thelow-pass filter are respectively connected to one output port, and each stub of the high-pass filter can be used for being connected with the copper-clad grounding plate through grounding holes and becomes a short circuit terminal for introduction of magnetic coupling after connection. The planar microstrip duplexer is advantaged by simple structure, light weight, small size, low in-band insertion loss, convenient tuning, and low production and manufacturing costs.

The invention discloses an antenna coupling characteristic integrated radio frequency integration module. The module comprises four parts of a frequency source unit, an antenna network unit, a transmitting unit and a receiving unit; the antenna network unit comprises a radio frequency channel and an antenna coupling circuit. According to the module of the invention, the antenna coupling characteristics among ACAS antenna ports are integrated on a radio frequency integration module through an antenna network unit in a form of a plane microstrip circuit; the radio frequency resources of a test system are designed integrally; through radio frequency integration design, the demanded radio frequency circuit architecture is optimized; the occupied radio frequency resources are saved; the system cost, weight and complexity are reduced; and the integration and reliability are improved.

The invention proposes a transition between a microstrip technology circuit and a waveguide, the waveguide being furnished with a probe linked electrically to the microstrip circuit. The transition comprises at least one first resonant cavity coupled by a first hole placed level with the said plane. The transition furnished with the cavity behaves as a bandstop filter. The transition is placed in an outside unit of a transmission system comprising a transmit circuit embodied in microstrip technology and an antenna of waveguide type. A transmit circuit comprises at least one local oscillator and the resonant cavity is tuned to the frequency of the local oscillator.

The invention relates to a hard microstrip circuit electroplating fixture, which comprises a main body and conductive magnetic clamping fingers. The main body comprises hard microstrip circuit substrate frames, electrodes I, electrodes II and magnets I. Each conductive magnetic clamping finger comprises electrodes III and a magnet II. The magnets I on the main body and the magnets II on the conductive magnetic clamping fingers attract each other to enable the conductive magnetic clamping fingers to fix hard microstrip circuit substrates in the hard microstrip circuit substrate frames on the main body. The electrodes I on the main body are electrically connected with back surfaces or front surfaces of hard microstrip circuits. The electrodes II on the main body are electrically connected with the front surfaces or the back surfaces of the hard microstrip circuits through the electrodes III on the conductive magnetic clamping fingers. All electrodes I on the main body are electrically connected with a lead-out electrode I. All electrodes II on the main body are electrically connected with a lead-out electrode II. Compared with the existing electroplating fixture, the hard microstrip circuit electroplating fixture provided by the invention has the advantages that very thin electroplated parts can be prevented from being damaged; the consistency of electric contact is good; the loading and unloading efficiency of the electroplated parts is high; and the precious metal is saved.

The invention discloses a low-pass band-pass five-duplex based on a novel frequency separation structure, which achieves through a microstrip circuit, and comprises a low-pass wave filter (T1) and four different center frequencies of band-pass wave filters (T2,T3,T4 and T5). The low-pass band-pass five-duplex based on the novel frequency separation structure can adjust a transmission zero on a band-pass side of the low-pass wave filter in a certain range by leading in a stepped impedance side line, thereby improving selectivity. The low-pass band-pass five-duplex based on the novel frequency separation structure can generate attenuation poles outside a low-pass wave filter band pass by leading in a defected ground structure, and greatly enlarges a stopband suppression range of a wave filter. The low-pass band-pass five-duplex based on the novel frequency separation structure can conveniently increase the channel number of multiple duplexes by using the novel frequency separation structure, and can control the center frequency of the band-pass channels. The low-pass band-pass five-duplex based on the novel frequency separation structure greatly reduces the effect of mutual interference between various channels by being excellently matched with the network, and enables various ports to have excellent isolation. The low-pass band-pass five-duplex based on the novel frequency separation structure has the advantages that the low-pass band-pass five-duplex based on the novel frequency separation structure is excellent in frequency selectivity, high out-of-band rejection, high isolation, small volume and simple and reliable structure and the like.

The invention relates to a single-fed, low-contour, cavity-backed, and double-frequency bilinear polarized antenna. The single radiation unit on the traditional double-frequency antennas is poor in performance; and the prior double-frequency and cavity-backed antenna has the disadvantages of large bulk, complex structure and high manufacturing cost. The invention is characterized in that the substrate is plated with metallic layers on two sides, wherein, the upper metallic layer is etched with a microstrip line for feeding and a plurality of grounded coplanar wave guiding transmission lines, wherein, the metallic strip in the middle is extended outwards to form the microstrip line. A plurality of metallized through holes, which are arrayed as a square, are penetrated through the upper metallic layer, the medium substrate and the lower metallic layer to form the cavity; the coplanar wave guiding transmission lines are extended into the cavity. Two orthogonal elongated radiation slits are etched on the lower metallic layer corresponding with the cavity. The invention has the advantages that: by adopting the general PCB technology, the production cost is notablely decreased and the invention can be integrated with the microstrip circuit without seam, the integrity of the system is improved; compared with the exact machining of the prior bilinear cavity-backed antennas, the manufacture speed is high and the cost is low.