Quasi‐elliptical band‐pass filters based on compact spiral resonators for C‐band applications. Issue 8 (27th February 2019)

• Record Type: Journal Article
• Authors: Cidronali, Alessandro; Collodi, Giovanni; Maddio, Stefano; Pelosi, Giuseppe; Selleri, Stefano
• Is Part Of: Microwave and optical technology letters. Volume 61:Issue 8(2019:Aug.)
• Page Start: 1983
• Page End: 1987
• Publication Date: 2019-02-27
• Subjects: elliptical filters -- microstrip filters -- intelligent transportation systems; Microwaves -- Periodicals; Optics -- Periodicals; 621
• DOI: 10.1002/mop.31791
• Languages: English
• ISSNs: 0895-2477

Abstract

Abstract: This letter proposes a quasi‐elliptical passband filter in via‐less microstrip technology. The filter is based on the Archimedean spiral, enabling a compact and low‐loss response with sharp transitions to stop bands. The developed filters fabricated on a commercial substrate, present losses below 2 dB within a 3 dB bandwidth of 500 MHz, and isolation exceeding 20 dB. Its extremely compact dimension, about 0.018 λ 0 2, and the low‐cost of fabrication, permits the integration within compact front‐end PCB.