Broadband filtering power divider capable of realizing high power dividing ratio and wide isolation bandwidth

Abstract

The invention discloses a broadband filtering power divider capable of realizing a high power division ratio and a wide isolation bandwidth. The broadband filtering power divider comprises a multimode resonator arranged in front of a power division node, impedance conversion networks arranged in parallel behind the power division node and an isolation resistor bridged between two power division branches. The multimode resonator has a plurality of resonance points, a plurality of transmission poles are introduced into return loss response, a plurality of approximate matching points are introduced into isolation response, and the power division bandwidth and the isolation bandwidth of the power divider are improved; and a subsequent impedance conversion network is integrated, so that filtering and high power division ratio are realized. And the impedance conversion network is used for forming broadband filtering power branches together with the multi-mode resonators so as to realize filtering and power distribution in a broadband range together. And the isolation resistor is used for realizing isolation between the output ports in a broadband range. The broadband filtering power divider has the advantages of being high in power division ratio, wide in power division and isolation bandwidth, small in isolation resistance, capable of achieving filtering power division implantation and the like at the same time, can be expanded to be a multi-path high-power-division-ratio filtering power divider, and is used in a feed network of an array antenna.

Description

technical field [0001] The invention belongs to the technical field of power dividers, in particular to a broadband filter power divider capable of realizing high power division ratio and wide isolation bandwidth. Background technique [0002] The feed network is an integral part of most antenna arrays and is used to transfer and distribute energy from the feed port to each antenna element with the desired power and phase distribution. In the design of the feed network, unequal power dividers are often used to improve the performance of the antenna array, such as reducing side lobes. [0003] Limited by machining accuracy, the power division ratio that can be achieved by conventional power dividers is very limited. Many scholars are committed to improving the power division ratio of power splitters. Typical design methods include using short-circuit coupled lines, changing the electrical length of transmission lines, and introducing coupling structures. However, these techn...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a broadband filter power divider capable of realizing high power division ratio and wide isolation bandwidth, so as to solve the problem of narrow power division bandwidth, limited power division ratio, narrow isolation bandwidth and isolation of existing unequal power dividers. The problem with too many resistors

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