Dielectric characterization of materials and lossy filter design using reflected group delay
type: CreativeWork
description: Filters play a significant role in different types of communication systems such as radars, cellular mobile and satellite communication. They are helpful in improving the performance of a communication system by restricting the transmission to the intended frequency band and rejecting the interfering signals from outside. Filters are expected to provide distortion free transmission to the signals in the passband and thus require flat in-band response and an adequate amount of out-of-band rejection. Filter technologies employing coaxial, waveguide and dielectric resonators can meet these requirements but at the cost of large size. Low loss in these filter technologies can be identified by their high quality factor (Q-factor). Higher insertion loss (lower Q-factor) in the filter response is acceptable based on the communication system using that filter and its position in that system. Filter design must deal with the electrical and physical specifications based on the required filter response. The concept of lossy filter is based on the fact that loss in a filter is distributed among the various resonators in a way that helps to achieve flat in-band response. This is achieved at the cost of degraded insertion loss. In this way, lossy filters provide an effective solution to the applications that can afford low Q-factor and higher insertion loss. Resonator is a building block in a filter network and a good understanding of resonators is quite useful in developing an insight of a filter network. Resonators also have a good deal of applications in methods used to perform dielectric characterization of materials. Keeping this connection of resonators and filter in view, the initial research presented in this thesis is focused on lossy resonators. This was helpful in developing some methods for dielectric characterization of materials. In addition to that, the research carried out using lossy resonators has also been helpful in understanding the behavior of resonators in a…
abstract: Filters play a significant role in different types of communication systems such as radars, cellular mobile and satellite communication. They are helpful in improving the performance of a communication system by restricting the transmission to the intended frequency band and rejecting the interfering signals from outside. Filters are expected to provide distortion free transmission to the signals in the passband and thus require flat in-band response and an adequate amount of out-of-band rejection. Filter technologies employing coaxial, waveguide and dielectric resonators can meet these requirements but at the cost of large size. Low loss in these filter technologies can be identified by their high quality factor (Q-factor). Higher insertion loss (lower Q-factor) in the filter response is acceptable based on the communication system using that filter and its position in that system. Filter design must deal with the electrical and physical specifications based on the required filter response. The concept of lossy filter is based on the fact that loss in a filter is distributed among the various resonators in a way that helps to achieve flat in-band response. This is achieved at the cost of degraded insertion loss. In this way, lossy filters provide an effective solution to the applications that can afford low Q-factor and higher insertion loss. Resonator is a building block in a filter network and a good understanding of resonators is quite useful in developing an insight of a filter network. Resonators also have a good deal of applications in methods used to perform dielectric characterization of materials. Keeping this connection of resonators and filter in view, the initial research presented in this thesis is focused on lossy resonators. This was helpful in developing some methods for dielectric characterization of materials. In addition to that, the research carried out using lossy resonators has also been helpful in understanding the behavior of resonators in a…
author: Walia, Gaurav
language: en
date published: 2024-12
date modified: 2026-07-24T04:03:43Z
provider: University of Regina
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Faculty of Graduate Studies and Research, University of Regina

PropertyValue
property ID: Handle
value: https://hdl.handle.net/10294/16786

PropertyValue
property ID: DOI
value: 10.82465/4681