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Millimeter-Wave Monolithic Schottky Diode Imaging Arrays


Zah, Chung-en (1986) Millimeter-Wave Monolithic Schottky Diode Imaging Arrays. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/YSN2-8F19.


Inexpensive and compact imaging systems with high sensitivity are needed for millimeter waves. In this study, the calculated efficiencies of elementary integrated-circuit feed antennas show that the antennas with substrate lenses are potentially better feeds than those without substrate lenses. Planar Schottky diodes are integrated with bow-tie antennas to form a one dimensional array. The energy is focused onto the antenna through a silicon lens placed on the back of the gallium-arsenide substrate. Putting a polystyrene cap on the silicon lens has been demonstrated to be an effective way to reduce the reflection loss. A self-aligning process together with proton isolation has been developed to make the planar Schottky diodes with a 1.1-THz zero-bias cutoff frequency. The antenna coupling efficiency and imaging properties of the system are studied by video detection measurements at 94 GHz. As a heterodyne receiver, a double-sideband mixer conversion loss of 11.2 dB and noise temperature of 3770°K have been achieved at a local oscillator frequency of 91 GHz.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Electrical Engineering
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Electrical Engineering
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Rutledge, David B.
Thesis Committee:
  • Rutledge, David B. (chair)
  • Bridges, William B.
  • Nicolet, Marc-Aurele
  • Pine, Jerome
  • Yariv, Amnon
  • Luhmann, Neville C., Jr.
Defense Date:30 July 1985
Funding AgencyGrant Number
Record Number:CaltechETD:etd-03112008-080410
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:927
Deposited By: Imported from ETD-db
Deposited On:14 Mar 2008
Last Modified:21 Dec 2019 02:06

Thesis Files

PDF (Zah_c_1986.pdf) - Final Version
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