High-near end suppression miniature microstrip hairpin line filter

Abstract

The invention provides a high-near end suppression miniature microstrip hairpin line filter, which comprises a resonator group, tapped external coupling and a microwave inductance line based on crosscoupling, wherein the tapped external coupling comprises microstrip lines, and the microstrip lines are directly connected onto resonators at two sides of the resonator group; the microwave inductanceline based on cross coupling comprises a coupling gap and an inductance line; one end of the inductance line is in tapped coupling with a resonator at one side of the resonator group, the other end is connected with the coupling gap, and the coupling gap is in parallel coupling with a resonator at the other side of the resonator group. The high-near end suppression miniature microstrip hairpin line filter has the characteristics of wide band, low insertion loss and high flatness in a miniature condition, the dual band can cover 4.8 to 5.0 GHz band of the fifth generation mobile communications, and good filtering characteristics are achieved in a high integration condition.

Description

technical field [0001] The invention relates to the field of electrical components, in particular to a miniaturized microstrip hairpin line filter with high near-end rejection. Background technique [0002] The miniaturization, low insertion loss, high in-band flatness and high out-of-band rejection of the filter required for the base station RF front-end are the main driving forces for the development of the filter. However, most of the microstrip filters that are widely used at present adopt a direct coupling structure design, which is difficult to meet the high near-end suppression requirements brought about by the increasing number of communication channels. [0003] At the same time, with the rapid development and wide application of modern mobile communications, there is an urgent demand for high-performance communication quality. In the fifth generation of mobile communications, the use of massive MIMO active antenna arrays has led to an increase in the number of RF f...

AI Technical Summary

Problems solved by technology

However, most of the microstrip filters that are widely used at present adopt a direct coupling structure design, which is difficult to meet the high near-end suppression requirements brought about by the increasing number of communication channels.

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