148results about How to "Improve VSWR" patented technology

The invention discloses a broadband dual polarized antenna unit, which comprises a radiator and a balanced feeding device, wherein the radiator consists of four radiation fins which are symmetric in pairs and are orthogonally distributed; the balanced feeding device consists of an excitation core wire and a balanced balun; the balanced balun is simultaneously formed into a support of each radiation fin; a symmetric radiation array is as long as a half of wavelength and is as wide as a quarter of the wavelength; each radiation fin further comprises a supporting area and a radiation area which are mutually adjacent; the two short sides and long sides of the radiation area and the two waists of the supporting area form a continuous curve; the ratio of the waist length of the supporting area to the length of the short side of the radiation area to the length of the long side of the radiation area is 1:1:2; and the two waists of each of the two adjacent radiation fins are arranged in parallel and are at an interval less than 0.1 wavelengths. The dual polarized antenna unit is a radiation oscillator which is relatively wider than the broadband and has good indexes, such as a standing-wave ratio and the like in a relatively wider bandwidth.

The invention discloses a Ku / Ka dual-band transmitting-receiving community antenna feed source assembly, which comprises a Ku / Ka waveband antenna feed assembly and a polarization adjusting mechanism, wherein the Ku / Ka waveband antenna feed assembly comprises a Ku waveband transmitting and receiving assembly and a Ka waveband transmitting and receiving assembly; and the polarization adjusting mechanism comprises a driving motor assembly, a transmission gear, a Ka rotation joint, a Ku transmission rotation joint and a Ku receiving rotation joint, and the driving motor assembly drives the Ka rotation joint, the Ku transmission rotation joint and the Ku receiving rotation joint to adjust a polarization angle through transmission of the transmission gear. The Ku / Ka dual modes share one feed source horn, a dielectric rod is cancelled, a full-waveguide mode is adopted, the structure is compact, the utilization rate is high, Ka circular polarization switching is facilitated, good Ku / Ka wave frequency band isolation is provided, and good polarization separation, polarization isolation, radiation features, a standing-wave ratio and gains are realized in the frequency band; and Ku line polarization adjustment can be carried out in real time, and automatic satellite aiming is realized.

The invention discloses a feedback type round wave-guide feed source for a microwave antenna, which comprises a round wave-guide, a taper medium support and a subreflector. The three parts are positioned on a same axial line, and tight compression-joint cooperation is adopted between the round wave-guide and the medium support and between the medium support and the subreflector. The feedback type round wave-guide feed source is characterized in that the parts are on the same axial line after being assembled; a plurality of annular grooves are processed at certain positions on the conical surface of a taper medium connecting block and a taper of the metal subreflector. Through the annular grooves processed on the subreflector and the conical surface of medium support, the invention changes the transmission direction of part reflected wave and reduces the electromagnetic energy entering the inside of a round wave-guide opening, thereby improving the standing wave ratio index of the feed source and having no influence on other indexes. The feed source with the structure has high rate of finished product for the production and processing, low cost and favorable generalizing value.

The invention discloses a method for designing partial-feed paraboloid multi-beam antenna feed array and is applicable to a satellite communication system. A reflection-side multi-beam antenna adopts a primary feed utilizing a feed array as paraboloid. The principle of forming multiple beams includes beams of the paraboloid antenna are deviated by means of transverse focus offset of the feed. According to the structural size of the integral antenna system and design procedure of feed array arrangement, a novel feed array layout is provided. The number of generable spot beams is twice times of practical feed number, all beams are tightly arranged, appointed spatial angle can be uniformly covered, and each spot beam has electrical characteristics of good gain uniformity, low minor lobe level, small beam width, high pointing accuracy and the like. The method for designing partial-feed paraboloid multi-beam antenna feed array is directly used for satellite-borne equipment or ground control communication station and has wide potential application and typical application value in the satellite communication system.

This invention relates to a microwave power splitter having multiple kinds of power splitting ratios, in which, the microstrip lines of said power splitter form a square, every edge of which is connected by two equivalent 1 / 4 wavelength lines, the cross points of two equivalent 1 / 4 wavelength lines at the right and left of the square are connected by an equivalent 1 / 2 line and the property impedance, the electric length and loaded capacitance value are determined by the output power distribution ratio of the power splitter, which gets high isolation without using any isolation resistors and the stationary ratio is good.

The invention relates to an anti-phase microwave power divider with arbitrary power distribution ratio. The length of a work wave is lambda; the divider has a parallel strip line, wherein the width of two arms of the strip line is as the same as each other, the depth of the strip line is h, and the characteristic impedance is Z0; public metal earth is inserted into a microwave substrate at the h / 2 of the depth of one side of the parallel strip line, wherein the inserting depth is l1; a back-to-back symmetrical micro strip pair with the length of l1 and the same width of the arm is formed; thewidth of the arm corresponding to public earth is changed to form into an asymmetric micro strip pair with the length of lambda / 4 and the different lengths of the two arms; the parallel strip line terminal lead input port with the depth of h and the asymmetric micro strip lead two output ports with the depth of h / 2 respectively have output power of P2 and P3 and arbitrary power distribution ratios of 1: K2, wherein the K2 equals to1, 2, 3... ; and the characteristic impedance corresponding to the asymmetric micro strip pair is respectively as follows: the public earth is provided with a fold line-shaped gap corresponding to the output end, and the symmetric center of the gap is inserted into the isolation resistance, wherein the vertical distance from the isolation resistance to the output port is as the same as the inserting depth. The divider has the advantages that the anti-phase belt width is wide, can design different arm widths of the asymmetric micro strip pair to obtain two powder distributions with arbitrary power ratio, and has good isolation and small power dissipation.

The invention discloses an ultra-wideband dual-polarized radiation unit. The antenna comprises a radiating element, a metal ring and a feed element. The metal ring is annularly arranged at the periphery of the radiating element. The radiating element comprises a first dipole and a second dipole which are arranged in a crossed manner. The first dipole and the second dipole respectively comprise tworadiation arms which are arranged diagonally. The feed element comprises a first transmission line and a second transmission line which are electrically isolated. The first transmission line is coupled with the first dipole, and the second transmission line is coupled with the second dipole. According to the invention, the standing-wave ratio and the directional diagram of the radiating element are improved. The bandwidth and the gain of the radiating element are increased. The ultra-wideband design is realized. The radiating element is rotationally and symmetrically arranged around the central position of the radiating element by 90 degrees, so that the structure is compact. The dislocation problem of the antenna in the batch production and assembly process can be avoided. The batch production efficiency is improved. In addition, the invention also discloses an ultra-wideband dual-polarized antenna.

The invention provides an UWB (ultra wide band) antenna with a dual resistance band function, and relates to an UWB antenna. The UWB antenna comprises a medium substrate (105), a radiating unit (101), an impedance matching input microstrip wire (102), a folding line type EBG (electromagnetic band gap) structure (103), a cross type EBG structure (106) and a metal grounding plate (104), wherein the radiating unit (101), the impedance matching input microstrip wire (102), the folding line type EBG structure (103) and the cross type EBG structure (106) are arranged on the medium substrate, and the metal grounding plate (104) is arranged under the medium substrate. The UWB antenna has the advantages that by utilizing the radiating unit, the impedance matching input microstrip wire and the metal grounding plate, the pass band bandwidth required by the UWB is realized; by arranging the two groups of EBG structures, the dual resistance band property is realized; the two resistance bands are respectively arranged near 5.2GHz and 6.8GHz, and the interference of an UWB system on an RFID (radio frequency identification) system (6.8GHz) and a WLAN (wireless local area network) system (5.15-5.35GHz) is inhibited.

A coaxial connector comprises a contact electrically connected with a core of a coaxial cable, a shell electrically connected with a shield of the cable, and a housing that supports the contact and insulates the contact from the shell. The capacitance between the portion consisting of the contact and the part of the core connected thereto together with an insulator exposed out of the shield, and the shell, is adjusted by a capacitance adjustment plate so that the coaxial cable has characteristic impedance of a predetermined value.

The invention relates to a low-profile high-gain panel antenna which comprises a radiation layer, a coupling layer and a feed layer, wherein the radiation layer is a slit radiation layer; radiation slits are arranged on the radiation layer; the length of each radiation slit is one half of the mean wavelength of a Ku wave band; the feed layer comprises a plurality of feed units; each single feed unit corresponds to a coupling unit and comprises a feed waveguide and a power splitter; and a waveguide T branch matching manner is adopted, and one capacitive resistance stair is arranged at a joint of each feed waveguide. According to the low-profile high-gain panel antenna, the efficiency of the antenna is improved to more than 85%, and the overall thickness of the antenna is reduced to about 21 mm; and on the basis that the efficiency of the antenna is guaranteed, the thickness of the antenna is greatly reduced, so that the size of the panel antenna is smaller, and the weight is lower. The low-profile high-gain panel antenna has the characteristics of low profile, high efficiency and the like.

A high frequency (HF) rotary joint including a rotor and a stator is disclosed. The rotor is connected to the stator by a high frequency connection via a λ / 4 line. The rotor, moreover, is mounted in the stator utilizing at least one radial aircushion bearing and at least one axial aircushion bearing. The bearings prevent contact between the rotor and the stator.

The invention discloses a broadband-plane electric small antenna with coplanar waveguide feeding, wherein a grounding plate is disposed on a medium plate, and the geometric center of the medium plate is an original point; and two long gaps with a symmetrical coplanar waveguide and a middle conduction band are etched on the ground plate, dual-spiral radiation faces are disposed symmetrically on outer sides of the two gaps with the coplanar waveguide, and a finger-shaped gap is etched at the position of the middle conduction band near the radiation faces. The antenna disclosed by the invention has the beneficial effects that the dual-spiral radiation faces are used to reduce longitudinal and horizontal sizes of the antenna and expand a working frequency band of the antenna; and the antenna has a small size, the structure is relatively simple, and the antenna has a relatively wide bandwidth.

The invention relates to a dual-stopband UWB (Ultra-wide Bandwidth) antenna with steep stopbands, relating to a UWB antenna. The dual-stopband UWB antenna with the steep stopbands, is formed by a dielectric substrate (105), a radiating element (101) above the dielectric substrate, a square etching fractal structure (107), an impedance matching input microstrip line (102), a fold line type EBG (Electromagnetic Band Gap) structure (103), a criss cross EBG structure (106) and a metal earth plate (104) under the dielectric substrate. According to the dual-stopband UWB antenna with the steep stopbands, the radiating element, the impedance matching input microstrip line and the metal earth plate are utilized to realize passband width required by UWB, and the dual-stopband characteristic of the steep stopbands is realized by utilizing the two groups of EBG structures and the square etching fractal structure above the radiating element. According to the antenna provided by the invention, the two stopbands are respectively close to 5.2Ghz and 6.8GHz, so that the interference of a UWB system on an RFID (Radio Frequency Identification Device) system (6.8GHz) and a WLAN (Wireless Local Area Network) system (5.15-5.35GHz) is restrained.

The invention discloses a missile-borne conformal microstrip antenna. The microstrip antenna is characterized in that the microstrip antenna comprises a cone-shaped cavity body arranged on a missile body and a conformal microstrip antenna body; the conformal microstrip antenna body is embedded in the cone-shaped cavity body; and the shape of the conformal microstrip antenna body is designed by referring to the radian of the cone-shaped cavity body so that the surface of the conformal microstrip antenna body is conformal to the surface of the missile body outside the cone-shaped cavity body. The conformal microstrip antenna is simple in structure and convenient to use and install, and while it is ensured that the conformal microstrip antenna can receive instructions, pneumatic performance and structure reliability can be improved.

The transducer consists of silicon substrate, N+ silicon under-impedance channel formed by diffusing N+ silicon in the substrate selectively, protective insulation layer prepared on the substrate, microwave absorption resistance set at the protective insulation layer and electrode leads for the first, the second as well as the third metal electrode. The trench which is in punch-through of the substrate and the protective insulation layer is made separately in between leads for the first, the second and the third electrode to form isolated thermocouple channel and isolated micro wave absorption channel in bridge shape.

The invention discloses a non-contact type ridge waveguide, micro-strip and coupling slot probe transition structure, and aims to provide a transition circuit having wide frequency band and low insertion loss. The non-contact type ridge waveguide, micro-strip and coupling slot probe transition structure in the invention is realized through the following technical scheme: a waveguide ridge extendsto be below the bottom of a windowed waveguide, and forms a section of a ridge open-end after being downwardly cut off and vertically turned; furthermore, it is separated into a waveguide coupling slot and a shielding cavity by a micro-strip substrate, which is downwardly inserted from the side wall of the window terminal of the windowed waveguide; a micro-strip probe is vertically inserted into the coupling slot from the rectangular window of the windowed waveguide; an electromagnetic coupling slot transition area is formed by facing the vertical wall surface of the ridge open-end; an electric field line parallel to the vertical surface of the ridge open-end 3 and an electric field line of the waveguide shielding cavity at the back of the micro-strip substrate act on the surface of the micro-strip probe together, so that surface current is formed; after distributed capacitance between the micro-strip probe and the side wall of the ridge open-end is offset through a section of high-impedance micro-strip line in the window channel of the windowed waveguide, a high-resistance ridge waveguide standard-TE<10> mode is converted into a micro-strip standard-TEM mode; and thus, transitionis completed.

The invention discloses an output matching circuit of an RF power amplifier. The output matching circuit is used in the output end of the RF power amplifier, and at least comprises a first capacitor and a second inductor, wherein one end of the first capacitor is connected with a collector of an amplifying tube of the RF power amplifier, and the other end is grounded; and one end of the second inductor is connected with the collector of the amplifying tube, and the other end is connected with the power voltage. By adopting a low-pass structure, the output matching circuit not only can improve gains, suppress harmonics and improve standing-wave ratio, but also has low power loss, thereby improving efficiency and output capacity of the power amplifier.

The invention relates to a welding type radio frequency coaxial-cable assembly, comprising a connector inner conductor arranged in a connector outer conductor, a cable inner conductor and a cable outer conductor are electrically connected with the connector inner conductor and the connector outer conductor respectively, and an insulator is arranged between the cable inner conductor and the cable outer conductor. The welding type radio frequency coaxial-cable assembly is characterized in that: the cable inner conductor is arranged in an inner hole of the connector inner conductor, the cable outer conductor is arranged in the inner hole of the connector outer conductor, and the cable inner conductor and the cable outer conductor are respectively connected with the connector inner conductor and the connector outer conductor. In the invention, the voltage standing wave ratio is reduced to 1.06 from 1.1 and three-order intermodulation is reduced to -168dBc from -139dBc, thereby effectivelyensuring good, stable and reliable electrical connection, ensuring the stability of electrical property and greatly improving the indexes of the voltage standing wave ratio and the three-order intermodulation. By adopting the welding type, half of parts are reduced, the weight of the connectors is reduced by 48 percent, and material cost is greatly saved.

The invention discloses an ultra wideband amplitude equalizer based on a defected ground structure. An input port, an input matching circuit, a main transmission line, an output matching circuit and an output port are orderly arranged from signal input to output, a DGS for loading the resistance is arranged on a metal ground layer under a dielectric substrate. The amplitude equalizer disclosed by the invention has the characteristics of ultra wideband, small size and simple structure, is easy for manufacturing and large-scale production, and worthy of popularizing in the industry.

The invention discloses a multi-output linear sweep frequency source for an interferometric radar. The linear sweep frequency source comprises a PCB circuit board, and a microprocessor, a reference clock circuit, a phase locked loop circuit, an active loop filter circuit, a voltage controlled oscillator, a frequency dividing circuit and a sweep frequency output circuit arranged on the PCB circuitboard. The microprocessor is used for controlling the working mode of the frequency sweeping source, and the phase locked loop circuit is logically controlled to output the frequency sweeping frequency. The reference clock circuit is used for generating an external reference frequency and supplying the reference frequency to the phase locked loop circuit. The phase-locked loop circuit is used forcarrying out logic calculation and frequency synthesis. The active loop filter circuit is used for filtering and attenuating the high-frequency noise in the output voltage of the phase-locked loop, and then outputting the high-frequency noise to the voltage-controlled oscillator. The voltage controlled oscillator is used for generating an original frequency signal according to the input voltage oscillation and outputting the original frequency signal to a frequency dividing circuit and a frequency sweeping output circuit. The frequency dividing circuit is used for dividing and filtering the original frequency signal according to the frequency dividing parameters.

A surface-mount antenna, in which a radiation electrode to be connected to a radio-communication high-frequency circuit to operate as an antenna is formed on a base member 2. One end of the radiation electrode serves as a feeding portion for being connected to the radio-communication high-frequency circuit, and the other end of the radiation electrode is an open end. The radiation electrode includes a portion whose width is increased as it goes from the feeding portion toward the open end. The base member includes a band-like feeding electrode connected to the feeding portion of the radiation electrode to serve to connect the feeding portion to the high frequency circuit, and a ground electrode disposed on one side or both sides of the feeding electrode with a defined spacing between the feeding electrode and the ground electrode. The spacing between the ground electrode and the feeding electrode is set to be smaller than the width of the feeding electrode.

The invention discloses a microwave frequency range combiner which comprises a rectangular cavity and a coupling plate which divides the rectangular cavity into two waveguide cavities. A longitudinal direction of the coupling plate is defined as a global longitudinal direction, and a width direction of the coupling plate is defined as a global width direction. At a middle of the global longitudinal direction, the coupling plate is provided with an orifice to form two parts with a distance. Rectangular cavity inner walls at two sides of a global width direction of the orifice are provided with a plurality of metal cylinders which are perpendicular to the inner walls and are pressed against each other. A coupling gap is formed between the metal cylinders and the coupling plate and / or between two adjacent metal cylinders. The two waveguide cavities are provided with impedance matching devices. According to the microwave frequency range combiner, the metal cylinders and the orifice on the coupling plate form the coupling gap which is combined with echelonment matching devices in the waveguide cavities, so that adjustment is flexible and convenient, whatever a frequency bandwidth, coupling energy size or a balance degree in a frequency band has an absolute advantage, and performance is substantially improved.

The invention discloses a power divider capable of continuously reconstructing a power distribution proportion, comprising a microstrip unequal Wilkinson power divider, a T-shaped circuit structure based on voltage regulation, a medium substrate and a floor metal layer; the microstrip unequal Wilkinson power divider and the T-shaped circuit structure based on the voltage regulation are adhered on one side of the medium substrate; the floor metal layer is adhered on the other side of the medium substrate; and the output power of the power divider on two output terminals is freely regulated between 1:2 and 1:4. The power divider capable of continuously reconstructing power distribution proportion is simple in structure, easy in processing, small in volume and is easy in integrating in other systems. The power divider is widely applicable to various microwave circuits and can better satisfy the performance requirement of the power divider.

The invention discloses a multi-band antenna and a terminal. An antenna body of the multi-band antenna comprises a grounding part, a feed part, a first radiation support arm and a second radiation support arm, and further comprises a third radiation support arm, wherein the first radiation support arm and the second radiation support arm are connected with the feed part, one end of the third radiation support arm is connected with the feed part, and the other end of the third radiation support is connected with the grounding part. A loop is additionally added between the feed part and the grounding part to serve as the third radiation support arm which can be used for expanding the bandwidth frequency band so as to increase the bandwidth of the antenna, and meanwhile no bandwidth loss of part of the frequency band can be caused. In addition, the third radiation support arm can be used for assisting in tuning so that the frequency band with the better standing-wave ratio can be obtained.

The invention relates to a laminated differential broadband base station antenna, which comprises an antenna main body, a reflecting plate and a coaxial line, wherein the antenna main body is arrangedabove the reflecting plate through the coaxial line, the antenna main body comprises a radiation unit, a cross-shaped feed structure, a parasitic unit, a first dielectric substrate and a second dielectric substrate, the radiation unit and the cross-shaped feed structure are installed on the lower surface and the upper surface of the first dielectric substrate respectively, the parasitic unit is installed on the lower surface of the second dielectric substrate, the second dielectric substrate is placed above the first dielectric substrate, the radiation unit is composed of four linear radiation arms, and the tail end of each radiation arm of the radiation unit is loaded with an L-shaped branch knot. The structure provided by the invention meets the electrical performance of the antenna, and has excellent radiation performance; and compared with a traditional single-port antenna, the antenna of the invention has the advantages that the anti-interference capability of the antenna is improved by adopting dual-port feeding, and the antenna is made of a PCB and has the advantages of low cost, simplicity in processing and the like.

The invention provides a microstrip radiation unit for a 5G system and an antenna. The microstrip radiation unit comprises a PCB plate (1), a metal guiding sheet (2), a radiation body and a groundinglayer (6); the PCB plate (1) serves as a base material; the radiation body is a copper-clad layer and is attached onto the upper surface of the PCB plate (1); the metal guiding sheet (2) is suspendeddirectly above the radiation body; the grounding layer (6) is a copper-clad layer and is attached onto the lower surface of the PCB plate (1); the radiation body includes a radiation main body (3) anda microstrip line (5), the microstrip line (5) and the radiation main body (3) intersect at a feed point L1; the direction of the microstrip line (5) and the direction of the radiation main body (3)are identical; and the microstrip line (5) is provided with a matching section (4). According to the microstrip radiation unit of the invention, a microstrip line patch array form is adopted, and therefore, the microstrip radiation unit is simple in structure and can be quickly assembled, and provides a favorable technical basis for the miniaturization of a 5G base station antenna.

The invention discloses a photovoltaic millimeter wave power synthesis circuit, which comprises a first load, a second load, a micro-strip line group and photoelectric conversion modules, wherein the micro-strip line group is formed by sequentially connecting N micro-strip lines in series; one end of the micro-strip group is connected to one end of the first load, while the other end of the micro-strip line group is connected with one end of the second load; both the other end of the first load and the other end of the second load are grounded; a common connection end of every two adjacent micro-strip lines in the micro-strip line group is connected with one photoelectric conversion module; each photoelectric conversion module is grounded; and each photoelectric conversion module is formed by sequentially connecting M photoelectric conversion units in series, wherein the N is greater than or equal to 3, and the M is greater than or equal to 2. The photovoltaic millimeter wave power synthesis circuit has the advantages that not only photoelectric conversion output power is increased but also output cutoff frequency is increased, so that work bandwidth is widened.

There is provided a chip antenna including: a dielectric block; a first conductive pattern formed on at least one surface of the dielectric block to connect to an external feeding part; a second conductive pattern spaced apart from the first conductive pattern at a certain distance so as to be capacitively coupled to the first conductive pattern to act as a radiator, the second conductive pattern having one end connected to an external ground part; and a third conductive pattern spaced apart from the first conductive pattern at a certain distance so as to be capacitively coupled to the first conductive pattern to enable impedance matching of the antenna, the third conductive pattern having one end connected to the external ground part.

The invention discloses a radiation unit of an antenna, and the radiation unit comprises an oscillator radiation circuit board which is provided with oscillator radiation arms arranged in pairs in a printed manner, wherein the width of each oscillator radiation arm is less than a half of the wavelength; an oscillator balun circuit board which is used for supporting the oscillator radiation circuitboard, wherein an oscillator balun is printed on the oscillator balun circuit board, the height of the oscillator balun is less than one fifth of the wavelength, and the oscillator balun is providedwith at least one first slot. Based on the invention, in particular for a 5G-MIMO large-array base station and a micro base station, the radiation unit can improve the overall performance of antennassuch as bandwidth, isolation, gain, cross polarization and the like as a whole, and meanwhile, the size of the antenna cannot be reduced with relatively small performance loss.

The invention provides a simple polarization tracker for communication in motion. The tracker comprises an orthogonal mode coupler, a polarization selector and a stepping motor, wherein the orthogonalmode coupler sequentially comprises an upper waveguide structure block, a middle waveguide structure block and a lower waveguide structure block from top to bottom, the upper waveguide structure block, the middle waveguide structure block and the lower waveguide structure block are connected to form a first channel and a second channel which are parallel to each other, a through hole is formed inthe middle waveguide structure block and close to the center of a bottom surface of a tail end of an inner cavity of a first rectangular waveguide, a cylindrical dielectric block is arranged in the through hole, a first probe is arranged in the center of the cylindrical dielectric block, the first probe is a cylindrical metal probe, a polarization torsion structure is arranged close to an input end of an inner cavity of a second rectangular waveguide, a medium rotor is arranged in the polarization selector, a second probe is arranged at one end of the medium rotor, and the second probe is a Z-shaped cylindrical metal probe. The simple polarization tracker has advantages of simple structure, convenient machining and assembling and low cost.