Title :
A low-profile conical beam loop antenna with an electromagnetically coupled feed system
Author :
Nakano, H. ; Fujimori, K. ; Yamauchi, J.
Author_Institution :
Coll. of Eng., Hosei Univ., Tokyo, Japan
fDate :
12/1/2000 12:00:00 AM
Abstract :
The radiation characteristics of a low-profile loop antenna are evaluated using the method of moments (MoM). The loop having a circumference of approximately two wavelengths is electromagnetically coupled to a bent Feed line and radiates a circularly polarized conical beam. The frequency bandwidth for a 3-dB axial ratio criterion is calculated to be approximately 0.5% for an antenna height of h=0.064 wavelengths. Over the same bandwidth, the input impedance is approximately 50 ohms and the gain is approximately 7 dB
Keywords :
antenna feeds; antenna radiation patterns; electric impedance; electromagnetic coupling; electromagnetic wave polarisation; impedance matching; loop antennas; method of moments; 7 dB; MoM; antenna gain; bent Feed line; circularly polarized conical beam; conical beam loop antenna; electromagnetically coupled feed system; frequency bandwidth; impedance matching; input impedance; low-profile loop antenna; method of moments; radiation characteristics; Acoustic beams; Acoustic scattering; Antenna feeds; Bandwidth; Electromagnetic coupling; Electromagnetic scattering; Impedance; Optical coupling; Polarization; Testing;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
