Title :
Analysis of linear coaxial antennas
Author_Institution :
Dept. of Electr. Eng., Nat. Chung-Hsing Univ., Taichung, Taiwan
fDate :
5/1/1998 12:00:00 AM
Abstract :
Two types of linear coaxial antennas, coaxial-colinear antennas, and slotted coaxial antennas are studied to check the possibility of using them as the base-station antenna in personal communication systems. The slot voltages and input impedance of linear coaxial antennas are obtained by using a transmission-line analysis where the radiation effect is accounted by a shunt and a serial admittance, respectively. The current distribution is obtained by solving an integral equation using the method of moments. The radiation pattern and directivity are then obtained from the current distribution and the reflection coefficient inside the coaxial cable. Factors analyzed include frequency, coaxial filling permittivity and segment number
Keywords :
antenna radiation patterns; coaxial cables; current distribution; directive antennas; electric potential; integral equations; linear antennas; method of moments; permittivity; personal communication networks; slot antennas; transmission line theory; 995 to 1060 MHz; UHF antenna; base-station antenna; coaxial cable; coaxial filling permittivity; coaxial-colinear antennas; current distribution; directivity; frequency; input impedance; integral equation; linear coaxial antennas; method of moments; personal communication systems; radiation effect; radiation pattern; reflection coefficient; segment number; serial admittance; shunt; slot voltages; slotted coaxial antennas; transmission-line analysis; Admittance; Coaxial components; Current distribution; Impedance; Integral equations; Moment methods; Radiation effects; Slot antennas; Transmission lines; Voltage;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
