Microstrip Tunable Bandpass Filter with the Colinear Resonators

This paper presents the lumped element circuit and transmission line equivalent circuit for a varactor-tuned bandpass filter. The filter consists of transmission lines, fixed capacitors, and a varactor diode. The colinear resonant sections, in this filter, are not configured in parallel, as they are...

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Main Authors:	Z. P. Wang, P. S. Hall, J. Kelly, P. Gardner
Format:	Article
Language:	English
Published:	Hindawi Limited 2013-01-01
Series:	International Journal of Antennas and Propagation
Online Access:	http://dx.doi.org/10.1155/2013/960138

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spelling	doaj-a01662fb91724354b22b43f8193ee0e52020-11-24T21:35:59ZengHindawi LimitedInternational Journal of Antennas and Propagation1687-58691687-58772013-01-01201310.1155/2013/960138960138Microstrip Tunable Bandpass Filter with the Colinear ResonatorsZ. P. Wang0P. S. Hall1J. Kelly2P. Gardner3School of Automation and Electrical Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaDepartment of EECE, University of Birmingham, Birmingham B15 2TT, UKFaculty of Science and Technology, Anglia Ruskin University, East Road, Cambridge CB1 1PT, UKDepartment of EECE, University of Birmingham, Birmingham B15 2TT, UKThis paper presents the lumped element circuit and transmission line equivalent circuit for a varactor-tuned bandpass filter. The filter consists of transmission lines, fixed capacitors, and a varactor diode. The colinear resonant sections, in this filter, are not configured in parallel, as they are in a conventional combline filter. For this reason the overall area of the filter is reduced. The passband of the filter can be tuned from 0.69 GHz to 1.20 GHz by varying the capacitance of the varactor diode. The insertion loss of this filter changes from 1.2 dB to 2.1 dB across this bandwidth.http://dx.doi.org/10.1155/2013/960138
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Z. P. Wang P. S. Hall J. Kelly P. Gardner
spellingShingle	Z. P. Wang P. S. Hall J. Kelly P. Gardner Microstrip Tunable Bandpass Filter with the Colinear Resonators International Journal of Antennas and Propagation
author_facet	Z. P. Wang P. S. Hall J. Kelly P. Gardner
author_sort	Z. P. Wang
title	Microstrip Tunable Bandpass Filter with the Colinear Resonators
title_short	Microstrip Tunable Bandpass Filter with the Colinear Resonators
title_full	Microstrip Tunable Bandpass Filter with the Colinear Resonators
title_fullStr	Microstrip Tunable Bandpass Filter with the Colinear Resonators
title_full_unstemmed	Microstrip Tunable Bandpass Filter with the Colinear Resonators
title_sort	microstrip tunable bandpass filter with the colinear resonators
publisher	Hindawi Limited
series	International Journal of Antennas and Propagation
issn	1687-5869 1687-5877
publishDate	2013-01-01
description	This paper presents the lumped element circuit and transmission line equivalent circuit for a varactor-tuned bandpass filter. The filter consists of transmission lines, fixed capacitors, and a varactor diode. The colinear resonant sections, in this filter, are not configured in parallel, as they are in a conventional combline filter. For this reason the overall area of the filter is reduced. The passband of the filter can be tuned from 0.69 GHz to 1.20 GHz by varying the capacitance of the varactor diode. The insertion loss of this filter changes from 1.2 dB to 2.1 dB across this bandwidth.
url	http://dx.doi.org/10.1155/2013/960138
work_keys_str_mv	AT zpwang microstriptunablebandpassfilterwiththecolinearresonators AT pshall microstriptunablebandpassfilterwiththecolinearresonators AT jkelly microstriptunablebandpassfilterwiththecolinearresonators AT pgardner microstriptunablebandpassfilterwiththecolinearresonators
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Microstrip Tunable Bandpass Filter with the Colinear Resonators

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