DESIGN OF QUASI-ELLIPTIC DUAL MODE FILTER

Microwave filters are usually designed to operate m the megahertz to
gigahertz frequency range. The filters are used in many applications like
broadcast radio, television, wireless communication and GSM [ 1]. So, these
microwave devices will have some filter which decides which of the signals are
transmitted or received. It is still a challenging problem for most designers
today to build a filter that gives low loss and a sharp cut-off response with
physically reduced size and complexity. For example cellular radio needs a
remarkable filter performance [2]. Thus the project aims to design an elliptic
dual mode resonator. This project is going to discuss in depth of the analysis
and design of a quasi-elliptic dual mode filter. This project background study
will include problem statement to justify this study, objectives, scope of study,
relevance and feasibility study. Literature review will cover aspects like the
characteristic of the dual-mode resonator, stepped impedance resonator, the
even-odd mode analysis, transmission zero, insertion loss, spurious resonance
frequency and quasi-elliptic filter that determines the filter response. The
research methodology to be used and implemented will be discussed further.
The data and information that have been collected and analyzed in this study
will be used to design, fabricate and test the filter within the given period of
time. Thus, some discussion and conclusion will be elaborated in the end.