Four-band unequal power divider gysel power divider based on π-shaped stubs

Abstract

The present invention proposes a four-band unequal power divider Gysel power divider based on π-shaped branches, aiming to increase the number of working frequency bands of the unequal power divider Gysel power divider to adapt to the working requirements of multi-band communication systems; including medium Substrate, a metal base plate printed on the lower surface of the dielectric substrate, an input feeder printed on the upper surface, two output feeders and two π-shaped branches that are mirror-symmetrical and connected at one end, and the other ends of the two π-shaped branches are connected There are isolation elements, the connection between the input feeder and each output feeder, and between an output feeder and an isolation element are respectively connected through a quarter-wavelength impedance converter, and a quarter of the connection between an output feeder and the input feeder The width of a wavelength impedance converter is equal to the width of the quarter-wavelength impedance converter connected between the other output feeder and the isolation element, and the quarter-wavelength impedance converter connected between the two output feeders and the input feeder The width of the device varies.

Description

technical field [0001] The invention belongs to the field of microwave and radio frequency technology, and relates to a four-band unequal power divider Gysel power divider, in particular to a four-band unequal power divider Gysel power divider based on π-shaped branches, which can be applied to wireless communication system radio frequency front end. Background technique [0002] The Gysel power divider is an important passive device in microwave radio frequency circuits, which has the function of power distribution or combination. It is an improved structure based on the Wilkinson power divider. It can not only achieve all port matching, but also , ground the isolated load to overcome the defect that the Wilkinson structure cannot sufficiently dissipate heat, so it is widely used in radio frequency circuits such as high-power amplifiers, mixers and antenna arrays. [0003] According to the ratio of energy distribution, Gysel power divider has two types: equal power divisio...

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Problems solved by technology

However, its disadvantage is that the unequal Gysel power divider can only work in two frequency bands at the same time, and cannot adapt to the working requirements of multi-frequency terminal equipment with three or more frequencies. The integrity of the metal ground, the structure is relatively complex, so it will be limited in practical applications

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