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Ka-Band Waveguide Hybrid Combiner for MMIC Amplifiers With Unequal and Arbitrary Power Output RatioThe design, simulation and characterization of a novel Ka-band (32.05 +/- 0.25 GHz) rectangular waveguide branch-line hybrid unequal power combiner is presented. The manufactured combiner was designed to combine input signals, which are in phase and with an amplitude ratio of two. The measured return loss and isolation of the branch-line hybrid are better than 22 and 27 dB, respectively. The application of the branch-line hybrid for combining two MMIC power amplifiers with output power ratio of two is demonstrated. The measured combining efficiency is approximately 93 percent over the above frequency band.
Document ID
20090025466
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
Simons, Rainee N. (NASA Glenn Research Center Cleveland, OH, United States)
Chevalier, Christine T. (Analex Corp. Cleveland, OH, United States)
Wintucky, Edwin G. (NASA Glenn Research Center Cleveland, OH, United States)
Freeman, Jon C. (NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 24, 2013
Publication Date
June 1, 2009
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking
Report/Patent Number
NASA/TM-2009-215639
E-16925-1
Meeting Information
Meeting: 2009 International Microwave Symposium
Location: Boston, MA
Country: United States
Start Date: June 7, 2009
End Date: June 12, 2009
Sponsors: Institute of Electrical and Electronics Engineers
Funding Number(s)
WBS: WBS 806866.02.03.0645.01
Distribution Limits
Public
Copyright
Public Use Permitted.

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