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Photonic-based microwave mixer

Silwal, Thakur Prasad (2015). Photonic-based microwave mixer. Master of Engineering Thesis, Charles Darwin University.

Document type: Thesis
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Author Silwal, Thakur Prasad
Title Photonic-based microwave mixer
Institution Charles Darwin University
Publication Date 2015
Thesis Type Master of Engineering
0906 - Electrical and Electronic Engineering
Abstract With speedy and continuous developments in telecommunications, electronic warfare technologies and the invention of the Internet and its applications like YouTube and Facebook have been profound influence to the modern society. Quicker and more reliable systems are in demand. Therefore, to fulfill these demand wideband signal processing is required, which can be achieved from the microwave photonics due to its unique features like low loss and immunity to the electromagnetic interference (EMI). Most of the different signal processor, the down converted photonic frequency is used in several remote area antennas, radar communication as well as defense system. And this thesis also deals only with the lower intermediate frequency (down converted frequency) output of the mixer that also gives the advantage over long distance transmissions, which may prove to be further advantageous when transmitting signals to remote areas. Employing lower intermediate frequency gives the several advantages: low cost, compactness and modest to well sorting ability in an interference free situation.

This study makes us familiar with different structures that have maximum spurious free dynamic range and help us to design an image rejection mixer’s structures, it’s analysis and simulation. The main objective of this thesis is to develop a new photonics based microwave mixer structure (image rejection mixer) that facilitates the maximum spurious free dynamic range by minimizing the intermodulation distortion and noise, good image rejection ratio as well as maximum gain. From the purposed DPMZM based image rejection mixer 122.4 dB.Hz4/5 is measured, which is about 22.4 dB higher than the photonic mixer and image rejection mixer.
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Created: Wed, 09 Dec 2015, 10:05:33 CST by Jessie Ng