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dc.contributor.advisorAbd-Alhameed, Raed A.
dc.contributor.advisorNoras, James M.
dc.contributor.authorAl-Yasir, Yasir I.A.
dc.date.accessioned2022-07-19T14:04:14Z
dc.date.available2022-07-19T14:04:14Z
dc.date.issued2020
dc.identifier.urihttp://hdl.handle.net/10454/19065
dc.description.abstractThe electromagnetic spectrum is becoming increasingly congested due to the rapid development of wireless and mobile communication in recent decades. New, compact and efficient passband filters with multi-functions and good performance are highly demanded in current and future wireless systems. This has also driven considerable technological advances in reconfigurable/tunable filter and filtering antenna designs. In light of this scenario, the objectives of this thesis are to design, fabricate and measure efficient, compact, multi-standard, and reconfigurable/tunable microstrip resonator filters and study the integration of the resonators with patch antennas. As a passive design, a compact dual-band filter is implemented to cover 2.5 to 2.6 GHz and 3.4 to 3.7 GHz for 4G and 5G, respectively. Another design is also presented with the advantages of a wide passband of more than 1 GHz. Conversely, new and compact reconfigurable filters are designed using varactor and PIN diodes for 4G and 5G. The proposed filters are tunable in the range from 2.5 to 3.8 GHz. The bandwidth is adjustable between 40 and 140 MHz with return losses between 17 to 30 dB and insertion loss of around 1 dB. Also, the thesis investigates the design of cascaded and differentially-fed filtering antenna structures. The cascaded designs operate at 2.4 and 6.5 GHz and have a relatively wide-band bandwidth of more than 1.2 GHz and a fractional bandwidth of more than 40%. For the differentially-fed structures, good performance is achieved at the 3.5 GHz with a high realized gain of more than 7.5 dBi is observed.en_US
dc.description.sponsorshipEuropean Union Horizon 2020 Research and Innovation Programme (Marie Skłodowska-Curie Actions) under grant agreement H2020-MSCA-ITN-2016 SECRET-722424.en_US
dc.language.isoenen_US
dc.rights<a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-nc-nd/3.0/88x31.png" /></a><br />The University of Bradford theses are licenced under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/">Creative Commons Licence</a>.eng
dc.subjectMicrowave filtersen_US
dc.subjectMicrostripen_US
dc.subjectResonatorsen_US
dc.subjectReconfigurableen_US
dc.subjectTunableen_US
dc.subjectVaractor diodeen_US
dc.subject5G wireless networksen_US
dc.subjectAntennaen_US
dc.subjectFiltennaen_US
dc.subjectWireless communicationsen_US
dc.titleDesign of New, Compact and Efficient Microstrip Filters for 5G Wireless Communications. Design, Simulation, Implementation and Measurement of Efficient, Compact, Multi-standard, and Reconfigurable/Tunable Microstrip Filters and their Integration with Patch Antennas for Current and Future Wireless Communicationsen_US
dc.type.qualificationleveldoctoralen_US
dc.publisher.institutionUniversity of Bradfordeng
dc.publisher.departmentFaculty of Engineering and Informaticsen_US
dc.typeThesiseng
dc.type.qualificationnamePhDen_US
dc.date.awarded2020
refterms.dateFOA2022-07-19T14:04:14Z


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