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7 results about "Rat-race coupler" patented technology
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A rat-race coupler, also known as a hybrid ring coupler, is a type of coupler used in RF and microwave systems. In its simplest form, it is a 3 dB coupler and is thus an alternative to a magic tee. Compared to the magic tee, it has the advantage of being easy to realize in planar technologies such as microstrip and stripline, although waveguide rat races are also practical. Unlike magic tees, a rat-race needs no matching structure to achieve correct operation.
Antenna system with radio frequency antenna configured with EBG structure and matched with annular coupler
The utility model discloses a radio frequency antenna equipped with an EBG structure and an antenna system matched with an annular coupler, which comprises a top copper plate, an upper dielectric layer, a curing plate, a lower dielectric layer and a bottom copper plate which are sequentially arranged from top to bottom, and a signal transmission layer is arranged between the upper dielectric layer and the curing plate; an annular coupler is arranged on the signal transmission layer, a branch knot of the annular coupler is connected with a balance port, a transmitting port, an antenna port and a receiving port through an impedance conversion branch knot, a radio frequency antenna is arranged at the antenna port, and two EBG structures are arranged around the radio frequency antenna. According to the antenna system in which the radio frequency antenna configured with the EBG structure is matched with the annular coupler, energy power division and signal isolation of a transmitting port and a receiving port are realized, so that the signal-to-noise ratio is improved; the EBG structure is configured around the radio frequency antenna, so that the propagation of reflected waves and plane waves is suppressed, the radiation gain of the antenna is increased, and the overall stability of the system is improved.
Owner:BEIJING RUILIN XINDA MILLIMETER WAVE TECH CO LTD
Full-connection beam forming network miniaturization design method based on TSV technology
The invention discloses a TSV technology-based full-connection beam forming network miniaturization design method, and belongs to the technical field of wireless communication and radar systems, and the method comprises the steps: in the miniaturization process of equivalently replacing a transmission line into a T-type network, designing the T-type network through a transmission matrix analysis method based on the TSV technology, and obtaining a miniaturized transmission line; a miniaturized directional coupler, a Wilkinson power divider, an annular coupler and a T-shaped attenuator are designed; all the devices are assembled through transmission lines, and a network topology structure of the full-connection beam forming network is obtained; on the basis of a network topology structure, transmission lines of connecting devices are processed according to different layers by using a TSV technology, and a miniaturized full-connection beam forming network is obtained. According to the method, the problem of large circuit area occupied by a cross junction due to large area and high circuit complexity of a full-connection beam forming network device is solved, and the miniaturization design of the whole network is realized.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Complex impedance matching high-selectivity filtering fusion dielectric waveguide annular coupler
The invention provides a complex impedance matching high-selectivity filtering fusion dielectric waveguide annular coupler. The coupler comprises a dielectric block, wherein the outer surface of the dielectric block is metalized; the dielectric block comprises a top surface and a bottom surface; the top surface is provided with a left side area, a center area and a right side area which are arranged in the first direction. The bottom surface is provided with a feed port; resonator units which are annularly arranged and are sequentially and adjacently coupled are arranged in the central area. A first cross coupling structure used for generating a transmission zero point is arranged in the left side area, the first cross coupling structure and the resonator units in the middle area form a filtering power divider, and the feed ports comprise an input feed port and an output feed port of the filtering power divider; a second cross coupling structure used for generating a transmission zero point is arranged in the right side area, the second cross coupling structure and the resonator units in the middle area form a filtering balun, and the feed ports comprise the input feed port and the output feed port of the filtering balun; the size and the weight of the filtering annular coupler can be reduced.
Owner:BEIJING UNIV OF POSTS & TELECOMM
Annular coupler
Owner:TMY TECH INC
Dielectric resonator antenna and multimode electromagnetic excitation method
PendingCN121584227ARadiating elements structural formsAntenna earthingsDielectric resonator antennaDielectric substrate
The invention relates to the technical field of antennas, in particular to a dielectric resonator antenna and a multimode electromagnetic excitation method, the dielectric resonator antenna comprises a dielectric substrate, a dielectric resonator element and a conductive feed assembly, and one side of the dielectric substrate is provided with a grounding plane; the dielectric resonator element is arranged on the grounding plane; the conductive feed assembly comprises a T-shaped power divider, a 180-degree annular coupler, a feed span bridge, a rectangular groove and a conductive probe; the T-shaped power divider and the 180-degree annular coupler are arranged on one side of the dielectric substrate, the T-shaped power divider is opposite to the grounding plane, and the 180-degree annular coupler is adjacent to the T-shaped power divider; the rectangular groove is arranged at the other side of the dielectric substrate and is arranged at the same side with the grounding plane; the conductive probe is arranged in the center of the dielectric resonator, and the bottom end of the conductive probe penetrates through the dielectric substrate and is connected with the microstrip line on the opposite side of the grounding plane; the dielectric resonator antenna provided by the invention has the characteristics of bandwidth and gain enhancement, and the isolation of four ports is good.
Owner:SHANTOU UNIV
High frequency power divider / combiner circuit
A high frequency power divider circuit for distributing an input signal to two or more signal output ports, comprising: a rat race coupler, wherein the rat race coupler is configured to couple an input signal provided at an input port of the rat race coupler to a first output of the rat race coupler and to a second output of the rat race coupler; a first coupling structure coupled to the first output of the rat race coupler to couple the first output of the rat race coupler with a first signal output port; and a second coupling structure coupled to the second output of the rat race coupler to couple the second output of the rat race coupler with a second signal output port; wherein a characteristic impedance of a first transmission line portion between the input port of the rat race coupler and the first output deviates in a first direction from a nominal loop impedance of the rat race coupler, and wherein a characteristic impedance of a second transmission line portion between the input port of the rat race coupler and the second output deviates in a second direction from the nominal loop impedance of the rat race coupler, the second direction being opposite to the first direction.
Owner:ADVANTEST CORP
Bidirectional variable gain phase shifter based on asymmetric power distribution
A bidirectional variable gain phase shifter includes: a rat-race coupler configured to distribute an input signal at a predetermined ratio and divide the input signal into first and second distributed signals; a phase inversion switch circuit configured to selectively invert phases of the respective first and second distributed signals; a hybrid coupler configured to receive two signals output from the phase inversion switch circuit, to phase-shift and combine the received signals, and to obtain first and second phase-shifted signals; and a phase selection switch configured to select one of the first and second phase-shifted signals and output the selected signal as an output signal, wherein phase and gain can be accurately adjusted bidirectionally without attenuation, insertion loss is low, and calibration is not required.
Owner:UI (UNIVERSITY IND FOUNDATION) YONSEI UNIVERSITY