Title :
A rigorous analysis of novel microstrip circular patch antennas
Author :
Mellah, S. ; Drissi, M. ; Citerne, J.
Author_Institution :
Inst. Nat. des Sci. Appliques, Rennes, France
Abstract :
Planar antennas are widely used as radiating elements in large arrays. The commonly used microstrip shapes are rectangular and circular patches. The microstrip circular patch (MCP) requires less area compared to the rectangular one. However, the edge-fed circular patch antenna presents a high return loss which restricts the use of a 50/spl Omega/ microstrip transmission line as a feed. In the present work, an inserted coplanar feed line for matching the MCP antenna to 50/spl Omega/ impedance is developed. The analysis is based on the resolution of the electric field integral equations (EFIE) by the method of moments (MoM) where triangular subdomain discretization is used to handle the arbitrary shape of the radiating elements. Two new MCP antennas which improve the matching performances at the resonance frequencies of the TM/sub 11/ and TM/sub 12/ modes are discussed.<>
Keywords :
antenna feeds; coplanar waveguides; electric fields; integral equations; method of moments; microstrip antennas; microstrip lines; mode matching; 50 ohm; 50/spl Omega/ microstrip transmission line; TM/sub 11/; TM/sub 12/; edge-fed circular patch antenna; electric field integral equations; feed; inserted coplanar feed line; large arrays; matching performances; method of moments; microstrip circular patch antennas; microstrip shapes; planar antennas; radiating elements; return loss; rigorous analysis; triangular subdomain discretization; Antenna arrays; Antenna feeds; Coplanar transmission lines; Impedance; Microstrip antenna arrays; Microstrip antennas; Patch antennas; Planar arrays; Propagation losses; Shape;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1994. AP-S. Digest
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-7803-2009-3
DOI :
10.1109/APS.1994.407946
