Compact tunable bandpass filter with wide tuning range of centre frequency and bandwidth using coupled lines and short-ended stubs

Zhu, He and Abbosh, Amin (2016) Compact tunable bandpass filter with wide tuning range of centre frequency and bandwidth using coupled lines and short-ended stubs. IET Microwaves, Antennas and Propagation, 10 8: 863-870. doi:10.1049/iet-map.2015.0693


Author Zhu, He
Abbosh, Amin
Title Compact tunable bandpass filter with wide tuning range of centre frequency and bandwidth using coupled lines and short-ended stubs
Journal name IET Microwaves, Antennas and Propagation   Check publisher's open access policy
ISSN 1751-8733
1751-8725
Publication date 2016-06-05
Year available 2016
Sub-type Article (original research)
DOI 10.1049/iet-map.2015.0693
Open Access Status Not Open Access
Volume 10
Issue 8
Start page 863
End page 870
Total pages 8
Place of publication Stevenage, Herts United Kingdom
Publisher The Institution of Engineering and Technology
Language eng
Abstract A tunable bandpass filter with wide tuning range of both its centre frequency and bandwidth is presented. This type of filter is a key element in modern wideband and multiband systems. The proposed filter is based on short sections of two pairs of shunt connected parallel-coupled lines and short-ended stub resonators, which are tuned using varactor diodes. The structure has two resonant modes as well as one-side edge transmission zero that can be relocated and controlled for any desired position. A thorough theoretical analysis is utilised to find the initial values of the filter's design parameters and estimate its performance. To validate the proposed design and its theoretical analysis, two prototype filters are fabricated and tested. The measured results indicate wide tuning range ratios for the centre frequency and bandwidth of up to 2.85 (0.52 to 1.48 GHz) and up to 5.2 (55 to 285 MHz), respectively. The fabricated filters are compact with an overall size (in guided wavelengths at the centre frequency) of less than 0.06 × 0.16.
Keyword Engineering, Electrical & Electronic
Telecommunications
Engineering
Telecommunications
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Information Technology and Electrical Engineering Publications
 
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