Title :
Characteristics of digital terrestrial broadcasting antennas
Author :
Ojiro, Y. ; Iitsuka, Y. ; Koglso, S. ; Kawakami, H. ; Sato, G. ; Sumihiro, S.
Author_Institution :
Antenna Giken Co. Ltd., Saitama, Japan
Abstract :
The characteristics of the batwing radiator, which is the heart of the superturnstile antenna system for VHF-TV broadcasting, are broad bandwidth. We investigate the modified batwing antenna for UHF used for digital terrestrial broadcasting. The characteristics of the 2-element modified batwing antenna with an infinite reflector and with a wire screen for the finite reflector are calculated by NEC-Win Pro. These antennas are connected with each element by a parallel feed line and fed at the center of this line. We estimate these antennas from 470 MHz to 770 MHz of the UHF-TV broadcasting band in Japan. The broad-band properties and the power gain of about 11 dBi are obtained in these frequencies.
Keywords :
UHF antennas; antenna feeds; antenna radiation patterns; broadcast antennas; digital television; electric impedance; television applications; television broadcasting; 2-element modified batwing antenna; 470 to 770 MHz; Japan; NEC-Win Pro; UHF-TV broadcasting band; VHF-TV broadcasting; batwing radiator; broad bandwidth; broadband properties; digital terrestrial broadcasting antennas; finite reflector; infinite reflector; input impedance; parallel feed line; power gain; radiation pattern; superturnstile antenna system; wire screen; Antenna feeds; Antenna radiation patterns; Broadcast technology; Conductors; Frequency; Hafnium; Heart; Impedance; Reflector antennas; Wire;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1999. IEEE
Print_ISBN :
0-7803-5639-x
DOI :
10.1109/APS.1999.788244
