Design of Novel Compact Tri-Band Bandpass Filter Using Embedded Resonators. Issue 3 (3rd April 2019)

• Record Type: Journal Article
• Authors: Liu, Hui; Zhang, Luokai; Li, Junlong; Luo, Miaohui; Gao, Li
• Is Part Of: Electromagnetics. Volume 39:Issue 3(2019)
• Page Start: 137
• Page End: 146
• Publication Date: 2019-04-03
• Subjects: Controllable frequencies -- embedded resonator -- tri-band bandpass filter; Electromagnetism -- Periodicals; 537
• DOI: 10.1080/02726343.2017.1279108
• Languages: English
• ISSNs: 0272-6343

Abstract

ABSTRACT: A novel compact tri-band bandpass filter is presented in this article. The proposed circuit utilizes a second-order embedded resonator. By controlling different parts of the embedded resonator, the operating frequencies can be controlled individually. Furthermore, by introducing source-load coupling, transmission zeros are generated near the passband, resulting in high selectivity. To verify the proposed idea, a tri-band bandpass filter with operating frequencies of 2.4/3.5/5.15 GHz is implemented, which are used to cover the WiFi and WiMax system. The design procedures are discussed in detail, and the simulated and measured results are presented.