Hybrid coupler with reconfigurable frequency and phase and design method thereof

Abstract

The invention provides a hybrid coupler with reconfigurable frequency and phase and a design method thereof. The coupler is formed by four microstrip lines parallel in pairs, four port impedance match wires, four blocking capacitors, four radio frequency choke coils, four varactors, a medium substrate, and a metal ground, the four microstrip lines and the four port impedance match wires are used for forming a basic branch line coupler, and the varactors are used for realizing the reconfigurable function of the phase and the frequency of the coupler. According to the hybrid coupler and the design method thereof, the directional coupler with reconfigurable phase and frequency is firstly proposed, a power-dividing device and a phase-shifting device are combined, and the hybrid coupler can be widely applied to beam-forming and antenna array systems.

Description

technical field [0001] The invention relates to a coupler used in microwave and millimeter wave communications, in particular to a hybrid coupler capable of simultaneously realizing reconfigurable frequency and phase, and a design method of the coupler. Background technique [0002] The coupler is a directional power distribution element, which can distribute the power to the coupling end in different proportions from the forward wave of the main transmission system. Couplers are used in power gain control devices, balanced amplifiers, modulation and demodulation circuits, and feeder networks for phased array radar systems. For a long time, people's research on couplers has mainly focused on bandwidth enhancement, dual-band, arbitrary power ratio and differential phase, and reconfigurable frequency and coupling coefficients. A reconfigurable phase coupler has never been realized so far. [0003] In fact, in a phased antenna array, the phase of the signal arriving at each...

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Problems solved by technology

[0003] In fact, in a phased antenna array, the phase of the signal arriving at each antenna needs to be precisely controlled by a beamforming network, which is usually achieved by cascading adjustable phase shifters after a power splitter or a hybrid coupler, but the The introduction of the phaser will lead to problems such as high insertion loss, large phase deviation, and large size of the entire feedforward network. If the power distribution unit can realize phase reconfiguration, multiple phase shifting units can be removed. The above problems will be easily solved, so the phase reconfigurable feature is very important in beamforming technology

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