High Performance 3-Dimensional Waveguide Cavity Bandpass Filter Operates At 5.1 Ghz For Spectrum Analyzer

Latip, Nur Amirah (2016) High Performance 3-Dimensional Waveguide Cavity Bandpass Filter Operates At 5.1 Ghz For Spectrum Analyzer. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Microwave systems have a vast impact towards the modern society due to the development and advanced of microwave applications. Filters are one of the important parts in microwave applications that are used to discriminate between wanted and unwanted frequencies in a device. In any devices, filters play as the main key to distinguish the devices in term of the device’s performance and cost especially in the congested spectrum. Thus, this thesis presents the design of High Performance 3-D Waveguide Cavity Bandpass Filter for Spectrum Analyzer Application. The filter will provide high frequency selectivity and low insertion loss that will be the main keys criteria for high Q filter design which will result in high performance of the filter. The design process will be used the lossless Chebyshev lowpass prototypes as the starting point and followed by the transformation of the lowpass prototype to waveguide cavity bandpass filter. The simulation of the design with the aid of HFSS software will be tuned and optimized in order to obtain the desired specification for the waveguide filter. The 3-D waveguide cavity bandpass filter would be very useful in the microwave systems especially in spectrum analyzer since the low insertion loss and high frequency selectivity that is provided by the filter are essential factors in obtaining high performance filter. Besides, the filter is designed in a simpler design with a smaller size since the minimum number of resonator will be used in the design thus it will decrease the manufacturing cost of this filter. By comparing between the research done and this project, it can be said that the smaller the size of the waveguide cavity bandpass filter, the higher the value of Q factor obtained. Since the project provides a smaller size filter, it is successfully provide a high performance 3-D waveguide cavity bandpass filter for spectrum analyzer application.

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