Novel single-band and multi-band bandstop filters for modern wireless communication systems

Description

The objective of this thesis is to introduce novel procedures and guidelines to design
bandstop microwave filters for modern terrestrial and satellite wireless communication
systems. Among all available microwave filter technologies, planar structures
of microstrip and substrate integrated waveguide (SIW) are chosen, due to ease of
fabrication, low profile, weight and manufacturing cost. Particularly, SIW structures
are more attractive because they have a better insertion loss, quality factor, and
power handling capability in comparison to their microstrip counterparts, and can
also be easily integrated into other planar circuitries.
A comprehensive hybrid analytic-optimization method is developed to synthesize
any single-band as well as multi-band bandstop coupling matrix. In this method, the
location of reflection zeros (RZs) and the attenuations in stopbands can be determined
in advance.
Several novel single-band, dual-band, and triple-band bandstop filters are designed
using regular and ridged SIW resonators, in-line coupled singlet resonators,
cross-coupled resonators, and bandstop stubs. The designed filters have fractional
bandwidths up to 23% . Moreover, a tunable ridged SIW bandstop resonator and a
tunable CPW resonator, etched into the top plate of the SIW transmission line, are introduced. Combining these two resonators, a dual-band SIW filter is designed that
permits one of its stopband to be tuned while another stopband is fixed.
All introduced filters in this thesis are verified by commercial electromagnetic
software, analytic investigations using Matlab codes, and measurements. / Graduate

Links & Downloads

1. http://hdl.handle.net/1828/7236
2. M. Esmaeili, and J. Bornemann, " Microstrip Bandstop Filters Using L- and T-Shaped Resonators," Proc. Asia-Pacific Microwave Conf., Dec. 2015.
3. M. Esmaeili, and J. Bornemann, " Quasi-elliptic triple-stopband filter based on six cross-coupled SIW resonators," IEEE Microw. Wireless. Compon. Lett., vol. 25, no. 12, pp. 802-804, Dec. 2015.
4. M. Esmaeili, and J. Bornemann, " Substrate integrated waveguide bandstop filter using partial-height via-hole resonators in thick substrate," IET Microw. Antennas Propag., vol. 9, no. 12, pp. 1307 - 1312, Sep. 2015.
5. M. Esmaeili, and J. Bornemann, " Substrate integrated waveguide triple-passband dual-stopband filter using six cascaded singlets," IEEE Microw. Wireless. Compon. Lett., vol. 24, no. 7, pp. 439-441, July 2014.
6. M. Esmaeili, and J. Bornemann, " Substrate intrated waveguide dual-stopband filter," Microwave Opt. Technol. Lett., Vol. 56, pp. 1561-1563, July 2014.
7. D. Formiga Mamedes, M. Esmaeili, J. Bornemann, "K-band substrate integrated waveguide variable phase shifter," Proc. European Conf. Antennas Propag., pp. 1-4, April 2016.

Tags

Microwave filters

Multi-band bandstop filters

Single-band bandstop filters

Non-resonating mode

Cross-coupled resonator filters

Substrate integrated waveguide

Additional Fields

Identifer	oai:union.ndltd.org:uvic.ca/oai:dspace.library.uvic.ca:1828/7236
Date	29 April 2016
Creators	Esmaeili, Mahbubeh
Contributors	Bornemann, Jens
Source Sets	University of Victoria
Language	English, English
Detected Language	English
Type	Thesis
Rights	Available to the World Wide Web, http://creativecommons.org/licenses/by-nc/2.5/ca/