Two New Ka-Band Traveling Wave Power Divider/Combiner Designs

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Title: Two New Ka-Band Traveling Wave Power Divider/Combiner Designs
Author: Jiang, Xin
Advisors: A. Mortazawi, Chair
J.F.Kauffman, Member
G.Lazzi, Member
Abstract: The purpose of this thesis is to develop a traveling wave power dividing/combining technique for a Ka-band 32-device high power amplifier system. Based on this technique, two main components of the power amplifier system have been designed. One component is a back-to-back connected 4-way waveguide-to-waveguide power divider/combiner and the other one is a back-to-back connected 8-way waveguide-to-microstrip power divider/combiner. Of the two components, the former has exhibited a 4 GHz (~12.5%) 0.5 dB bandwidth with 0.15 dB insertion loss at 32 GHz in simulation. The later utilizes a novel power coupling structure, which has the advantages of low profile, ease of fabrication and efficient heat sinking for the solid-state amplifiers. It was fabricated and experiments on this passive structure have demonstrated a minimum overall insertion loss of 1.8 dB at 32.5 GHz with a 3 dB bandwidth of 15%. The power amplifier composed of these two traveling-wave designs offers a potential broadband solution for solid-state amplifiers applied in high power millimeter-wave systems.
Date: 2001-06-25
Degree: MS
Discipline: Electrical Engineering
URI: http://www.lib.ncsu.edu/resolver/1840.16/2339


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