A hybrid branch-line coupler for simultaneous reconstruction of frequency and power fraction

Abstract

The invention discloses a hybrid branched line coupler which simultaneously realizes frequency and power division ratio reconstruction, realizes frequency and power division ratio reconfiguration based on the branched line structure, not only realizes the function of the power divider but also realizes the adjustable working frequency, which is very suitable for the application of modern wirelesscommunication system. Compared with the prior art, by loading a varactor diode on a branch line coupler, arbitrary power dividing ratio and arbitrary center frequency output can be realized, and the whole structure is simple, miniaturized and easy to integrate. In addition, because the planar microstrip structure is used, the manufacturing process is simple and the cost is low; Because the outputfrequency is adjustable, it is possible to communicate over a wide bandwidth. Therefore, the invention is reasonable in design and simple in structure, can meet the requirement of output power variation of an output signal, can work in a plurality of communication bands, and is conducive to improving the overall performance of a communication system.

Description

technical field [0001] The invention relates to the field of microwave communication, in particular to a hybrid branch line coupler which realizes frequency and power division ratio reconstruction at the same time. Background technique [0002] With the rapid development of 5G technology and multi-standard communication systems, in order to meet its needs, the performance requirements of radio frequency devices working in the microwave and millimeter wave bands are getting higher and higher. The coupler is an indispensable component in radio frequency devices. It is a directional power distribution element that can distribute power from the forward wave of the main transmission system to the coupling end and the through end in different proportions. Couplers are widely used in feeder networks of base station systems, balanced amplifiers, radar systems, balanced mixers, power gain control devices, antenna array systems, and phased array radar systems. Previous research has b...

AI Technical Summary

Problems solved by technology

Previous research has been able to achieve simultaneous reconfigurability of frequency and power ratio, but this type of coupler is based on a two-section or multi-section coupled line structure. Relatively speaking, the structure based on branch line couplers has not been realized. The frequency and power ratio can be reconfigured at the same time, that is, the structure based on the branch line coupler can only realize single function reconfiguration, for example, only the operating frequency, power ratio or single adjustment phase can be adjusted, while the frequency and power ratio At the same time, reconfigurability is of great significance in radio frequency, which can meet the working requirements of different communication standards and make the system more flexible, which is what should be pursued in communication

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