A Miniaturized Microstrip Quadplexer

Abstract

The invention discloses a miniaturized microstrip quadruplexing device, comprising an input port, a first output port, a second output port, a third output port, a fourth output port, a cross-shaped resonator, a first stepped impedance resonator, a second stepped impedance resonator, a third stepped impedance resonator, a fourth stepped impedance resonator, a fifth stepped impedance resonator, a first split-ring resonator and a second split-ring resonator which have one half wave lengths, a first short circuit resonator having a one quarter wavelength, and a first open circuit resonator having a one half wavelength; the cross-shaped resonator produces resonance at three different frequencies, the three frequencies correspond to three channels, i.e., a first channel, a second channel and a fourth channel, and the three channels share the same input port and the same cross-shaped resonator; a third channel is independently introduced into a feeder part of the input port by using distributed coupling. The miniaturized microstrip quadruplexing device can realize good filter property and miniaturization property.

Description

Technical field [0001] The invention relates to the technical field of high-frequency devices, in particular to a miniaturized microstrip quadruplexer. Background technique [0002] Due to the rapid development of wireless communications in recent years, whether it is the popularization of 4G technology, the boom of the Internet of Things, or the arrival of 5G, it marks that wireless technology will usher in a peak period of vigorous development. Today's wireless communication systems are basically multiplexed systems. For time division duplex, the problem can be solved by arranging the receiving and transmitting in different time slices. For frequency division multiplexing, in order to reduce the number of antennas and save Cost requires the design of special devices to make electromagnetic waves of different frequencies share an antenna without causing mutual interference. Such devices are multiplexers. With the development of communication technology, wireless communication h...

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Problems solved by technology

[0005] In 2013, Shi-Shan Luo, Ko-Wen Hsu, and Wen-Hua Tu et al published an article titled "ComPact and High-IsolationMicrostriP QuadruPlexer" on "Asia-Pacific Microwave Conference Proceeding", in which multimode resonators and The stepped impedance resonator adopts distributed coupling to form a quadruplexer. The quadruplexer has a compact structure, but the filter in the quadruplexer is only second-order, the bandwidth is very narrow, and the isolation and stopband characteristics are not given.

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