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Title: Omnidirectional antenna having constant phase

Various technologies presented herein relate to constructing and/or operating an antenna having an omnidirectional electrical field of constant phase. The antenna comprises an upper plate made up of multiple conductive rings, a lower ground-plane plate, a plurality of grounding posts, a conical feed, and a radio frequency (RF) feed connector. The upper plate has a multi-ring configuration comprising a large outer ring and several smaller rings of equal size located within the outer ring. The large outer ring and the four smaller rings have the same cross-section. The grounding posts ground the upper plate to the lower plate while maintaining a required spacing/parallelism therebetween.
Issue Date:
OSTI Identifier:
Sandia Corporation SNL-A
Patent Number(s):
Application Number:
Contract Number:
Resource Relation:
Patent File Date: 2015 Aug 19
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
Country of Publication:
United States

Works referenced in this record:

High Gain and Low Cross-Polar Compact Printed Elliptical Monopole UWB Antenna Loaded with Partial Ground and Parasitic Patches
journal, January 2012
  • Reddy, G. Shrikanth; Mishra, Sanjeev Kumar; Kharche, Shilpa
  • Progress In Electromagnetics Research B, Vol. 43, p. 151-167
  • DOI: 10.2528/PIERB12070206

GO Shaping of Omnidirectional Dual-Reflector Antennas for a Prescribed Equi-Phase Aperture Field Distribution
journal, January 2007
  • da Silva Moreira, Fernando Jos; Prata, Aluizio; Bergmann, Jos Ricardo
  • IEEE Transactions on Antennas and Propagation, Vol. 55, Issue 1, p. 99-106
  • DOI: 10.1109/TAP.2006.888396

Physical Limitations of Omni‚ÄźDirectional Antennas
journal, December 1948
  • Chu, L. J.
  • Journal of Applied Physics, Vol. 19, Issue 12, p. 1163-1175
  • DOI: 10.1063/1.1715038