Miniature bandpass filter with wide stopband using open-loop resonators

• Published in: Microwave and optical technology letters Vol. 53; no. 4; pp. 748 - 751
• Main Authors: Feng, Li-Ying, Zheng, Hong-Xing, Sun, Cheng-Guang, Gao, Feng-You
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 01.04.2011
• Subjects: bandpass filter; Bandpass filters; microstrip; Microwaves; Miniature; On-line systems; open-loop resonator; Reproduction; Resonant frequencies; Resonant frequency; Resonators; slow-wave effect

To reduce the size and improve the performance, a miniature microstrip bandpass filter (BPF) is investigated in this article. On the basis of open‐loops, an interdigital capacitive load has been connected. The new design has advantages of a compact size and a large ratio of the first spurious resona...