Miniature orthogonal broadband electric bridge

Abstract

The invention discloses a miniature orthogonal broadband electric bridge. The miniature orthogonal broadband electric bridge comprises a two-sided copper-coated dielectric plate and two single-sided copper-coated dielectric plates, wherein microstrip circuits with same structure are respectively etched on a front surface and a back surface of the two-sided copper-coated dielectric plate, each microstrip circuit comprises two N-order Lambda-fourth impedance matching transmission lines which are symmetrically arranged, N is equal to 2, 3 until 10, ends of the two Lambda-fourth impedance matchingtransmission lines are connected via a 50-ohm impedance line, an open-circuit branch is arranged at a connection position of the Lambda-fourth impedance matching transmission lines, the two single-sided copper-coated dielectric plates are respectively laminated onto the front surface and the back surface of the two-sided copper-coated dielectric plated etched with the microstrip circuits to forma deviation strip line-structure directional coupler, four ports of the two microstrip circuits are respectively an input port, a direct-through port, a coupling port and an isolation port, the inputport and the direct-through port are arranged in the same microstrip circuit, the coupling port and the isolation port are arranged in the same microstrip circuit, and the direct-through port and thecoupling port are arranged at the same side.

Description

technical field [0001] The invention belongs to coupler technology, in particular to a miniaturized orthogonal broadband electric bridge. Background technique [0002] The bridge is a shunt component, belonging to the port network, which plays the role of power distribution and changing the phase of the signal in the circuit. Typically, a separate coupler performs the bridge function. When the operating frequency of the microwave circuit is not too wide, the general coupler can meet the requirements. However, for microwave circuits operating in a wide frequency band, it is required to design a broadband coupler. Common broadband couplers include sawtooth couplers and interdigital couplers. In engineering, they have a wide range of applications. However, these two couplers belong to the microstrip directional coupler, and the microstrip circuit has its own insurmountable weakness: in order not to affect the performance of the circuit, the distance from the upper surface o...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a miniaturized orthogonal broadband bridge, which solves the problems of conventional orthogonal bridges such as excessive size, narrow frequency bandwidth, small power capacity, poor phase characteristics of through ports and coupled ports, etc.

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