Luhaib, S orcid.org/0000-0002-6170-5114, Somjit, N orcid.org/0000-0003-1981-2618 and Hunter, I orcid.org/0000-0002-4246-6971 (2018) Spurious Stopband Improvement of Dual-Mode Dielectric Resonator Filters Using T-shaped Coupling Probe. IET Microwaves, Antennas and Propagation. ISSN 1751-8725
Abstract
This paper presents a new design technique for dual-mode dielectric loaded resonator filter operating at 2.18GHz by using T-shape coupling probe. A cylindrical dielectric puck is suspended in the middle of metallic cavity and short-circuited on the side walls. Four vertically etched-slots through the dielectric puck from the top to the base of the ceramic puck offer a high unloaded quality factor of 4300 at the fundamental T E11δ mode and allows the T-shape coupling to be located close to the centre of the dielectric puck. The size reduction ratio in this resonator was 11% compared with air filled coaxial resonator. Fourth-poles Chebyshev bandpass filter (BPF) with planar configuration was designed and implemented by employing two dielectric-loaded cavities. The experimental results show that the spurious-free window of approximately 820 MHz from the fundamental frequency of 2.18GHz and the operational bandwidth of 77 MHz were achieved.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018, The Institution of Engineering and Technology. This paper is a postprint of a paper submitted to and accepted for publication in IET Microwaves, Antennas and Propagation and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at the IET Digital Library. |
Keywords: | Microwave filters; Dual-mode resonators and filters; Spurious mode suppression; Dielectric resonator |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 29 Jun 2018 10:14 |
Last Modified: | 24 Aug 2018 14:19 |
Status: | Published |
Publisher: | Institution of Engineering and Technology |
Identification Number: | 10.1049/iet-map.2018.5296 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:132777 |