Title :
A coaxial multi-slot antenna used for LEO-MSAT
Author :
Xie, Z.M. ; Yung, E.K.N. ; Chen, R.S. ; Han, Y.F.
Author_Institution :
Dept. & Electron. Eng., City Univ. of Hong Kong, Hong, Kong
Abstract :
It is foreseen that suburban areas and countryside will be covered by low-Earth-orbit mobile satellite communications (LEO-MSAT). In order to make LEO-MSAT commercially viable, its mobile terminal must be designed as a consumer product that is low-cost, light-weight, small-in-size, and robust. This is a tall order to be fulfilled because the mobile terminal for LEO-MSAT is more complex than its counterparts for GEO-MSAT although the former has a lower power rating. Comparing with a DBS antenna, a MSAT antenna must be equipped with a steerable main-beam for tracking the satellite position, preferably it is an automatic tracking system. Moreover, the antenna must be low-cost, high-gain, high-efficiency, small-in-size, and preferable low-profile. To this end, an innovative antenna that satisfies most of the aforementioned requirements has been conceived. The innovative antenna is an array comprising two to three antennas. Each antenna itself comprises a coaxial transmission line protruded from a ground plane. In this paper, an accurate analytical technique is developed for studying and designing the element of the novel LEO-MSAT antenna array, the multi-slot coaxial line antenna. The calculated and experimental radiation patterns show that the technique is successful.
Keywords :
UHF antennas; antenna radiation patterns; coaxial cables; mobile satellite communication; satellite antennas; slot antenna arrays; 2 GHz; LEO-MSAT antenna array; UHF; automatic tracking system; coaxial multi-slot antenna; coaxial transmission line; consumer product; ground plane; high-efficiency antenna; high-gain antenna; low-cost antenna; mobile terminal; multi-slot coaxial line antenna; radiation patterns; satellite position tracking; steerable main-beam; Antenna arrays; Coaxial components; Consumer products; Low earth orbit satellites; Power transmission lines; Robustness; Satellite antennas; Satellite broadcasting; Satellite communication; Transmission line antennas;
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.1999.789298