Wilkinson power distributor terminated with arbitrary complex impedors

Abstract

The invention relates to a Wilkinson power distributor terminated with arbitrary complex impedors. A single-node coupling microstrip line is adopted for replacing the traditional two-section symmetrical quarter wavelength microstrip line, i.e. a power distribution circuit main body only comprises a coupling microstrip line (Ze, Zo and theta) and an isolation resistor (Rw), and in addition, four calculation formulas of the unique value of four parameters (Ze, Zo, theta and Rw) of the power distributor can be precisely solved by an odd-even mode analytical method only through determining the terminated complex impedors (ZS and ZL) of three input and output ports. After a proper medium plate is selected, various geometric dimensions such as line width, line length and line gap of the single-node coupling microstrip line can be obtained through calculation by a microwave simulation software ADS (advanced design system). The Wilkinson power distributor has the advantages that the device structure is simple and compact, the size is small and exquisite, the integration is easy, the use in dense integrated circuits is convenient, and the problem that the input and output ports of the power distributor are simultaneously connected with the arbitrary complex impedors is solved.

Description

Technical field [0001] The invention relates to a microwave passive device, specifically, to a Wilkinson power divider with arbitrary complex impedance terminated by a single-section coupled microstrip line and a single isolation resistor, which belongs to microwave transmission technology field. Background technique [0002] In the microwave radio frequency circuit, the power divider is an important passive device for power distribution or combination. Because the microstrip power divider has the characteristics of compact structure, stable performance, low cost and easy implementation, it is widely used in microwave radio frequency circuits such as balanced power amplifiers, Doherty power amplifiers, balanced mixers and array antennas. The three ports of the traditional Wilkinson power divider are all connected with 50 ohm impedance. Because power amplifiers or mixers and other devices need to be terminated with complex impedance, the traditional Wilkinson power divider can no...

AI Technical Summary

Problems solved by technology

Rosloniec scholars in Poland proposed a multi-section power divider that terminates frequency-dependent complex impedances based on computer-aided design algorithms. However, the large size of this structure is not easy to miniaturize, and the only accurate solution cannot be obtained by solving closed-form equations.

X.Tang in Singapore proposed a power divider based on coupled microstrip lines, which is simple in structure, easy for circuit integration and miniaturization, but it only verifies the case of terminating real impedance

[0004] So far, no literature or papers have been found that have been published at home and abroad based on Wilkinson power dividers with arbitrary complex impedances terminated at both ends of the coupled microstrip line at the same time.

Images