Microwave millimetre-wave substrate integrated waveguide E face sensing band filter

Abstract

The invention discloses a microwave/millimeter wave substrate integrated waveguide E-surface inductive band filter, comprising a dielectric substrate with double sides provided with metal chips, where the dielectric substrate is provided with an integrated waveguide, which is composed of at least two rows of metallic through holes, one surface of the dielectric substrate is provided with input and output ends respectively connected with two ends of the metal chips, an E-surface inductive band is arranged in the center of the integrated waveguide and of metallic through holes. And it is implemented by traditional PCB or LTC process, beneficial to its integration in the design of a microwave/millimeter wave circuit, simple in structure, and easy to design and low-cost, almost no parasitic radiation and having good frequency selectivity.

Description

technical field [0001] The invention relates to a substrate integrated waveguide filter applied to microwave and millimeter wave circuits, in particular to a microwave and millimeter wave substrate integrated waveguide E-plane inductive band filter. Background technique [0002] With the rapid development of modern communication systems, the requirements for the entire radio frequency system are getting higher and higher, and the requirements for radio frequency systems with low production cost, high performance, simple production process, light weight and small size are becoming more and more urgent. As one of the key components in radio frequency systems, microwave and millimeter wave filters play a very important role in radio frequency systems. In the radio frequency system, it can limit the system to transmit and receive signals within a certain frequency band, and can be used in the duplexer of the radio frequency system as a key component of the feeding system of the ...

AI Technical Summary

Problems solved by technology

A filter with small size and light weight can be designed by using microstrip technology, but in the high-frequency microwave frequency band, the parasitic radiation of this filter is large, and the insertion loss is difficult to meet the system requirements

Therefore, metal waveguides are often used in high-frequency microwave band systems such as millimeter waves to achieve high-Q, low-loss, and high-frequency selectivity filters, but this rectangular waveguide filter is difficult to process, especially in the millimeter wave band. Making this kind of filter requires high processing precision; secondly, the production cost of this kind of filter is relatively expensive; thirdly, this kind of filter is relatively bulky, and it is difficult to apply it to the design of microwave and millimeter wave integrated circuits

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