Work

A compact half‐mode substrate integrated waveguide bandpass filter based on highly confined slow waves with loading capacitive patches

Year: 2024

Type: article

Abstract: A novel slow‐wave half‐mode substrate integrated waveguide (HMSIW) bandpass filter (BPF) is proposed based on spoof surface plasmon polaritons (SSPPs) with loading capacitive patches (LCPs). The bandpass characteristics are achieved by etching complementary SSPPs on the metal patches of the HMSIW. SSPPs exhibit a slow‐wave effect, which effectively reduces the overall size of the filter. At the same time, using proper LCPs between the HMSIW metal via and the complementary SSPPs structure, the effective dielectric constant of the HMSIW can be changed, reducing the low cutoff frequency and further facilitating the miniaturisation of size. A prototype of the proposed filter is designed, fabricated, and measured. The measured results show that the proposed filter has the in‐band insertion loss of 1 and 3 dB passband range of 6.4–9.8 GHz.

Source: IET Microwaves Antennas & Propagation

DOI: 10.1049/mia2.12501

Authors: Ning‐Ning Wang, De‐Wei Zhang, Qing Liu, Hang Qian, Wei‐Zhe Qu

Institution: PLA Information Engineering University

Language: English

Topic: Microwave Engineering and Waveguides

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,470

Funder: National Natural Science Foundation of China