Title :
Study of Broadband Small Size Conical Antennas
Author :
Kyi, Yu Yu ; Jianying, Li ; Beng, Gan Yeow
Author_Institution :
Temasek Lab., Nat. Univ. of Singapore
Abstract :
A small broadband antenna with the vertically polarized, omnidirectional field pattern over 100 - 500 MHz (VSWR<2) is studied. The input impedance of the conical antenna varies with the flare angle, as expected. It is observed that an optimum flare angle exists for 50Omega matched impedance. From the results obtained, it is concluded that improvement in bandwidth can be achieved with the height of the conical antenna is approximately equal to the base radius of the cone, i.e. a flare angle of 45deg is optimal for all cases considered here
Keywords :
UHF antennas; VHF antennas; antenna radiation patterns; broadband antennas; conical antennas; electromagnetic wave polarisation; impedance matching; 100 to 500 MHz; broadband small size conical antennas; flare angle; input impedance; matched impedance; omnidirectional field pattern; vertically polarized field pattern; Antenna radiation patterns; Bandwidth; Broadband antennas; Coaxial components; Directive antennas; Frequency; Impedance; Loaded antennas; Magnetic materials; Q factor;
Conference_Titel :
Antennas and Propagation Society International Symposium 2006, IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
1-4244-0123-2
DOI :
10.1109/APS.2006.1710977
