Compact quad-band bandpass filter based on uniform impedance stub-loaded resonators. Issue 2 (24th April 2014)

• Record Type: Journal Article
• Authors: Lan, Siang-Wen; Weng, Min-Hang; Ye, Chang-Sin; Hung, Cheng-Yuan
• Is Part Of: International journal of microwave and wireless technologies. Volume 7:Issue 2(2015)
• Page Start: 121
• Page End: 126
• Publication Date: 2014-04-24
• Subjects: Microstrip, -- Bandpass filter (BPF), -- Stepped-impedance resonator (SIR), -- Transmission zeros, -- Quad-band; Wireless communication systems -- Periodicals; Microwave circuits -- Periodicals; Radio frequency -- Periodicals; 621.381305
• DOI: 10.1017/S175907871400052X
• Languages: English
• ISSNs: 1759-0787

Abstract

Abstract : A new quad-band bandpass filter for Global System for Mobile Communications, Wireless Local Area Network, and Worldwide Interoperability for Microwave Access is designed and fabricated using the stub-loaded resonator (SLR) technology without complex fabrication process, such as via-hole or multi-layer substrate. Owing to the embedded SLR, the proposed quad-mode resonator is compact. Equivalent circuits of the proposed quad-mode resonator are analyzed in detail, and high design freedom is shown because of shifting the passband frequencies individually. Good passband selectivity and isolation of the each passband at 1.8, 2.4, 3.5, and 5.2 GHz can be well achieved due to the transmission zeros appeared near the each passband edges. Experimental results show good agreement with the simulated results.