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A Ka-Band (26 GHz) Circularly Polarized 2x2 Microstrip Patch Sub-Array with Compact FeedA Ka-Band (26 gigahertz) 2 by 2 sub-array with square-shaped microstrip patch antenna elements having two truncated corners for circular polarization (CP) is presented. In addition, the layout for a new compact microstrip feed network for the sub-array is also presented. The compact feed network offers a footprint size reduction of near 60 percent over traditional sub-array at 26 gigahertz. Experimental data indicates that a truncation amount a equals 0.741 millimeters for an isolated patch element results in a return loss (S (sub II)) of minus 35 decibels at 26.3 gigahertz. Furthermore, the measured S (sub II) for the proof-of-concept sub-array with the above elements is better than minus 10.0 decibels at 27.7 gigahertz. However, the impedance match and the operating frequency can be fine-tuned to 26 gigahertz by adjusting the feed network dimensions. Lastly, good agreement is observed between the measured and simulated S (sub II) for the subarray for both right hand and left hand CP. The goal of this effort is utilize the above sub-array as a building block for a larger N by N element array, which would serve as a feed for a reflector antenna for satellite communications.
Document ID
20170006476
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Chrysler, Andrew
(Utah Univ. Salt Lake City, UT, United States)
Furse, Cynthia
(Utah Univ. Salt Lake City, UT, United States)
Simons, Rainee N.
(NASA Glenn Research Center Cleveland, OH United States)
Miranda, Felix A.
(NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
July 11, 2017
Publication Date
July 9, 2017
Subject Category
Communications And Radar
Report/Patent Number
GRC-E-DAA-TN38340
Meeting Information
Meeting: 2017 IEEE International Symposium on Antennas & Propagation
Location: San Diego, CA
Country: United States
Start Date: July 9, 2017
End Date: July 14, 2017
Sponsors: Institute of Electrical and Electronics Engineers, International Union of Radio Science
Funding Number(s)
WBS: WBS 432938.11.01.03.06.02.04
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
Microstrip
Satellite Communications
Array Antenna
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