Title :
Wideband circularly polarized rhombic loop antennas with different feed models
Author :
Morishita, Hisashi ; Iizuka, Tetsuya ; Himsawa, K. ; Nagao, T.
Author_Institution :
Dept. of Electr. Eng., Nat. Defense Acad., Kanagawa, Japan
Abstract :
Two types of circularly polarized linear antenna having a rhombic loop configuration are investigated. One type of circularly polarized antenna is a single feed dual rhombic loop antenna (DRLA). The DRLA consists of two rhombic loops of the same size and is located above an infinite ground plane. The other is a hula hoop antenna (HHA). The HHA is fed from a coaxial cable, of which the inner conductor is connected to the antenna itself and the outer conductor is connected to the ground plane. Two types of feed are introduced for each of the DRLA and the HHA. The antenna characteristics for each feed model are calculated by the method of moments. The results are in good agreement with the measured data.
Keywords :
antenna feeds; antenna testing; coaxial cables; electromagnetic wave polarisation; loop antennas; method of moments; antenna characteristics; circularly polarized linear antenna; coaxial cable feed; feed models; hula hoop antenna; infinite ground plane; inner conductor; measured data; method of moments; outer conductor; single feed dual rhombic loop antenna; wideband circularly polarized rhombic loop antennas; Antenna feeds; Bandwidth; Broadband antennas; Coaxial cables; Conductors; Current distribution; Frequency; Physics; Polarization; Wire;
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.1995.529994
