Title :
Radiation properties of ring microstrip antenna fed by symmetrical cross slot
Author :
Sawamura, M. ; Tabata, M. ; Haneishi, M.
Author_Institution :
Dept. of Electr. & Electron. Eng., Saitama Univ., Urawa, Japan
Abstract :
The microstrip ring antenna (R-MSA) system has been studied by many researchers, because it is possible to reduce the antenna size. However, since the R-MSA has high impedance characteristics at the feeding point, impedance matching is difficult. We investigate the R-MSA element fed by a symmetrical crossed slot (SCS-R-MSA) which easily permits impedance matching. We describe a new type of dual polarized planar antenna with two-port lines coupled to the R-MSA through a symmetrical crossed slot. A circularly polarized planar antenna using this R-MSA as a radiating element and its array are described. In order to evaluate the performance, some planar antennas were tested at C-band. In this experiment, the basic design of both the dual and circularly polarized planar antenna systems were investigated.
Keywords :
antenna feeds; antenna radiation patterns; antenna testing; electromagnetic wave polarisation; impedance matching; loop antennas; microstrip antenna arrays; C-band; antenna radiation properties; circularly polarized planar antenna; dual polarized planar antenna; experiment; feeding point; high impedance characteristics; impedance matching; microstrip ring antenna; performance evaluation; planar antenna array; radiating element; ring microstrip antenna; symmetrical cross slot feeder; two-port lines; Antenna arrays; Antenna radiation patterns; Dielectric substrates; Impedance matching; Microstrip antennas; Optical fiber polarization; Optical fiber testing; Planar arrays; Resonant frequency; Slot antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1995. AP-S. Digest
Conference_Location :
Newport Beach, CA, USA
Print_ISBN :
0-7803-2719-5
DOI :
10.1109/APS.1995.531002
