A Compact Broadband High Balanced Distributor

Abstract

The invention discloses a compact broadband high-balance-degree allocator. The compact broadband high-balance-degree allocator adopts a multi-section quadrature bridge structure and is formed a plurality of sections of weak-coupling bridges with the coupling degree smaller than -10dB and a plurality of sections of strong-coupling bridges with the coupling degree larger than -10dB in a cascading mode, the weak-coupling bridges adopt an achievement structure of lumped capacitors and distribution parameter inductors. The compact broadband high-balance-degree allocator has the advantages that the N (N>=3) cascaded quadrature bridges with different coupling degrees are adopted to achieve the two-way allocator, the amplitude balance degree in broadband is better than + / -0.12dB, the distribution parameter inductors and the lumped parameter capacitors are adopted for the weak-coupling bridges and arranged in a broken line staggered mode, and the size of a circuit is greatly reduced. On the one hand, the good amplitude balance can reduce composition loss and promote amplifier efficiency, and on the other hand, the good amplitude balance can ensure that a composite amplifier has a good pre-correction effect and promote the linear index of the amplifier. The compact structure facilitates use, and effectively reduces the size and the weight of an amplifier overall unit.

Description

technical field [0001] The present invention relates to a high-balance distributor, more specifically, it relates to a compact broadband high-balance distributor. Background technique [0002] The quadrature bridge is a power distribution and synthesis device commonly used in radio frequency power amplifiers. A typical quadrature bridge such as figure 1 As shown, it includes two quarter-wavelength transmission lines 11 and 12 with the same size and coupled with each other, and an absorption resistor 13 . For example, one end 111 of the transmission line 11 is used as an input end, and the other end 112 is a through output end; port 121 of the transmission line 12 is a coupled output end, and port 122 is an isolation end, which is connected to the absorbing load 13 . [0003] The distribution and synthesizer using the orthogonal bridge has good port reflection loss and isolation in a wide bandwidth, simple structure and high power capacity, but the amplitude balance is not ...

AI Technical Summary

Problems solved by technology

[0005] The disadvantage of the multi-section orthogonal bridge divider is that since the length of each bridge is a quarter of the wavelength, the length of the three-section bridge is often too long (600MHz corresponds to The length is 375mm), which takes up a lot of space and brings inconvenience to use

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