Compact tunable bandpass filter with wide tuning range using ring resonator and short‐ended coupled lines. Issue 7 (1st April 2015)

• Record Type: Journal Article
• Authors: Zhu, H.; Abbosh, A.
• Is Part Of: Electronics letters. Volume 51:Issue 7(2015)
• Page Start: 568
• Page End: 570
• Publication Date: 2015-04-01
• Subjects: band‐pass filters -- resonator filters -- varactors -- tuning -- UHF filters -- resonators; compact tunable bandpass filter -- wide tuning filter -- ring resonator -- short ended coupled lines -- short ended coupled line structure -- frequency 0.52 GHz to 1.42 GHz -- bandwidth 90 MHz to 320 MHz; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2015.0346
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : A tunable bandpass filter with wide tuning ranges for both the centre frequency and bandwidth is presented. The filter is based on using a ring resonator connected to a short‐ended coupled‐line structure. Two transmission zeros are generated in the upper stopband resulting in a sharp cutoff and harmonic suppression across a wide stopband. A thorough procedure is used to analyse the proposed filter. A prototype is fabricated and tested. The achieved results indicate a wide centre frequency and bandwidth tuning ranges of 0.52–1.42 GHz and 90–320 MHz, respectively.