Title :
Numerical techniques for VHF/UHF cylinder radiators
Author_Institution :
Mission Res. Corp., Valparaiso, FL, USA
Abstract :
The frequency response of a dipole with asymmetric radii fed in the sleeve via a coaxial aperture is computed. A numerical electromagnetics code (NEC4.1) wire grid model is compared with a body of revolution finite difference time domain (2.5FDTD) solid model after Fourier transformation. Directive gain patterns and source impedance show an effective approach to designing a broad range of omnidirectional TM/sub Z/ antennas for VHF/UHF spectrum.
Keywords :
Fourier transforms; UHF antennas; VHF antennas; antenna feeds; antenna radiation patterns; antenna theory; aperture antennas; dipole antennas; finite difference time-domain analysis; frequency response; linear antennas; Fourier transformation; VHF/UHF cylinder radiators; asymmetric radii fed; body of revolution finite difference time domain solid model; coaxial aperture; dipole; directive gain patterns; frequency response; numerical electromagnetics code NEC4.1 wire grid model; numerical techniques; omnidirectional TM/sub Z/ antennas; source impedance; Apertures; Coaxial components; Directive antennas; Electromagnetic modeling; Electromagnetic radiation; Finite difference methods; Frequency response; Impedance; Solid modeling; Wire;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1999. IEEE
Conference_Location :
Orlando, FL, USA
Print_ISBN :
0-7803-5639-x
DOI :
10.1109/APS.1999.789249
