Title :
Planar trapezoidal and pentagonal monopoles with impedance bandwidths in excess of 10:1
Author :
Evans, J.A. ; Amunann, M.J.
Author_Institution :
Dept. of Electron. & Commun. Eng., Dublin Inst. of Technol., Ireland
Abstract :
A planar disc monopole antenna has been developed for the Japanese TV band (90-770 MHz) in 1991. A model for determining the input impedance of a circular disc monopole has been proposed in 1993. In 1998, a simple formula for predicting the frequency corresponding to the lower edge of the bandwidth was proposed. The planar monopole may be realised by replacing the cylindrical element of a conventional monopole with a planar element.
Keywords :
UHF antennas; VHF antennas; antenna radiation patterns; electric impedance; monopole antennas; television antennas; 90 to 770 MHz; Japanese TV band; UHF; VHF; circular disc monopole; cylindrical monopole antenna; frequency prediction; impedance bandwidth; input impedance; pattern bandwidth; planar disc monopole antenna; planar element; planar pentagonal monopole; planar trapezoidal monopole; Antenna radiation patterns; Bandwidth; Broadband antennas; Capacitance; Electron traps; Frequency; Geometry; Impedance; Resonance; TV;
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.1999.788241
