Title :
Wideband wire T-monopole antenna
Author :
Nishimura, Takashi ; Kuga, Nobuhiro ; Arai, Hiroyuki ; Madono, Kazuhito ; Ito, Atsushi
Author_Institution :
Fac. of Eng., Tokyo Polytech. Univ., Kanagawa, Japan
Abstract :
The inverted-F antenna is well known as a low-profile and low wind-loading antenna appropriate for mobile communications. It has a hemispherical radiation pattern, which is advantageous in multipath environments; however, its directive gain in the vertical plane is not high to communicate with other stations in the horizontal direction. A posted T-monopole antenna with parasitic elements is proposed as a wideband wire antenna for such applications. Feed structures improving the impedance bandwidth and reducing the undesired radiation towards the north-pole direction are mainly discussed. Analysis is carried out using the method of moments (Hirasawa, K. and Haneishi, M., 1992).
Keywords :
antenna feeds; antenna radiation patterns; broadband antennas; electric impedance; method of moments; mobile communication; monopole antennas; wire antennas; T-monopole antenna; directive gain; feed structures; hemispherical radiation pattern; impedance bandwidth; low wind-loading antenna; low-profile antenna; method of moments; mobile communications; multipath environments; wideband antenna; wire antenna; Antenna radiation patterns; Bandwidth; Broadband antennas; Directive antennas; Feeds; Impedance; Mobile antennas; Mobile communication; Moment methods; Wire;
Conference_Titel :
Wireless Communication Technology, 2003. IEEE Topical Conference on
Print_ISBN :
0-7803-8196-3
DOI :
10.1109/WCT.2003.1321427
