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Analysis of linear coaxial antennas

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1 Author(s)
Jean-Fu Kiang ; Dept. of Electr. Eng., Nat. Chung-Hsing Univ., Taichung, Taiwan

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

Published in:

IEEE Transactions on Antennas and Propagation  (Volume:46 ,  Issue: 5 )