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Title: Investigation and design of novel spatial power combiner
Authors: HUI SO CHI
Keywords: ultra-broadband, stability, EBG, Vivaldi, coupling and technique
Issue Date: 8-Jul-2005
Citation: HUI SO CHI (2005-07-08). Investigation and design of novel spatial power combiner. ScholarBank@NUS Repository.
Abstract: This project aims to create a novel spatial power combiner. The design utilizes the broadband techniques and EBG ground-slot structure to enhance the bandwidth and the out-of-band stability. A broadband ground-slot coupling technique is proposed and implemented on Design 1. This prototype can achieve 40% gain bandwidth at 5GHz centre frequency. The Tee-junction coupler in Design 1 is subsequently modified and the final bandwidth is increased to 52%. To achieve a greater performance, the direct signal coupling technique and the EBG hole structure are proposed and verified through the circuit-feed spatial power combiner prototype. The measurement results show that it can achieve more than 90% impedance bandwidth and is also stable from 0.5GHz to 20.5GHz.
Appears in Collections:Master's Theses (Open)

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