Title :
Compact conical antennas for wide-band coverage
Author :
Sandler, Sheldon S. ; King, Ronold W.P.
Author_Institution :
Dept. of Electr. Eng., Northeastern Univ., Boston, MA, USA
fDate :
3/1/1994 12:00:00 AM
Abstract :
A broadband antenna with a vertically polarized, omnidirectional electric field is studied. The design of the antenna and its feeding system in the wide frequency range from 20 to 1000 MHz is described and the driving-point impedance determined. Also calculated are the voltage standing-wave ratio (VSWR) and the input impedance of a transmission line connected to the antenna. More efficient operation at low frequencies is obtained by adding a length of transmission line to form a resonant section with the antenna. The effect of the different properties of the earth´s surface on the field pattern is treated in a companion paper
Keywords :
antenna feeders; antenna radiation patterns; electric impedance; mobile antennas; 20 to 1000 MHz; VSWR; biconical antenna; broadband antenna; compact conical antennas; driving-point impedance; feeding system; input impedance; resonant section; transmission line; vertically polarized omnidirectional electric field; voltage standing-wave ratio; wide-band coverage; Antenna feeds; Broadband antennas; Earth; Frequency; Polarization; Resonance; Surface impedance; Surface treatment; Transmission line antennas; Voltage;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
