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Active quasi-optics and measurements


Deckman, Blythe Chadwick (2000) Active quasi-optics and measurements. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/a6x5-z643.


Quasi-optical grid amplifiers and oscillators have been limited in power to less than a watt at Ka-band until recently. Additionally, measurements of grid structures have been done with far-field techniques, making reflection measurements difficult. Some focused techniques have been used as well. Here are presented a 5-watt grid amplifier at 37.2 GHz, and a grid oscillator, after Moonil Kim, that shows 1 watt of effective transmitter power at 38 GHz. Focused beam measurement techniques are also discussed, introducing a new method to calibrate a network analyzer for reflection measurements. Measurements are presented on passive structures to validate the calibration technique, and then measurements of the active structures are presented. Following the presentation of the 5-watt amplifier and l-watt oscillator, a design technique for a l0-watt grid amplifier is presented, along with a mode converter that allows the grid to be fed from a standard waveguide port.

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:
  • Unknown, Unknown
Defense Date:4 May 2000
Record Number:CaltechTHESIS:10052010-090202496
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:6094
Deposited On:05 Oct 2010 16:21
Last Modified:16 Apr 2021 23:26

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