Single-Layer Planar Broadband Hybrid Ring Coupler Based on Short-Circuit Multi-Line Coupling Stubs

Abstract

The invention discloses a single-layer planar broadband hybrid ring coupler based on a short-circuit multi-line coupling branch, which belongs to the electrical field. The coupler is built on a single-layer printed circuit board; the top layer is the coupler circuit structure, including four ports, which are input port, output through port, isolation port and output coupling port; and the first section of microstrip line in series , short-circuit multi-line coupling stubs, the second section of microstrip line and the third section of microstrip line. The input port and the output coupling port are located on the same side of the circuit board, the output through port and the isolation port are arranged symmetrically, and are respectively connected to the SMA head. Each microstrip line in the short-circuit multi-line coupling stub has the same line width and length, and the spacing between each microstrip line is the same. The invention uses a short-circuit six-wire coupling branch, which is simple in structure, easy to design and easy to process and manufacture; the circuit structure is planar, and can be processed by a single-layer circuit board; the performance reaches the flat broadband performance, and realizes full coverage of the main working frequency band of 5G .

Description

technical field [0001] The invention belongs to the electrical field, and relates to a passive radio frequency device, in particular to a single-layer planar broadband hybrid ring coupler based on a short-circuit multi-line coupling branch. Background technique [0002] At present, with the sharp increase of people's communication needs and the increasingly diversified demands on communication functions, people's demands on the channel capacity of mobile communication networks are getting higher and higher. With the development of technology, the mutual compatibility and integration of different communication standards and technologies is imperative, and the modern communication system has entered the era of multi-standard and multi-function. With the development of 5G mobile communication systems, the entire mobile communication industry has begun to explore new frequency bands. At present, many countries around the world have begun to use sub6GHz spectrum resources for 5G...

AI Technical Summary

Problems solved by technology

Therefore, many researchers have proposed to use coupled microstrip lines instead of microstrip lines to achieve broadband performance; however, the coupling coefficient of short-circuited double-wire coupled microstrip lines is low, and there are differences in phase velocity and group delay between odd and even modes, and the circuit structure is complex. , can not get broadband performance in the plane, so it is not conducive to use it in the radio frequency circuit of modern mobile terminals

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