Title:
ANTENNA CHANGEOVER SYSTEM
Document Type and Number:
Japanese Patent JP3231819
Kind Code:
B2
Abstract:
PURPOSE: To obtain the antenna changeover system in which a missing bit or communication interrupt due to out of synchronism of a receiver of a communication opposite party is eliminated attended with the changeover of a transmission antenna in a mobile body amount antenna system for the satellite communication by the DS-SSMA system.
CONSTITUTION: The mobile body amount antenna system for the satellite communication is provided with plural antennas 2a, 2b forming the space diversity, a phase difference detector 10 measuring a relative phase between reception carriers corresponding to the antennas 2a,2b from a communication satellite, and an antenna directive angle calculation section 7 calculating an antenna directive angle tracking the communication satellite based on the information of azimuth and attitude of a mobile body and a position of the communication satellite, and a timing when the phase of the transmission radio wave between the antennas 2a, 2b is decided to switch the antennas 2a, 2b and the transmission section 6 based on the timing.
More Like This:
| WO/2017/153274 | ANTENNA |
| JPH09214227 | CHIP ANTENNA |
Inventors:
Kensuke Mikoshiba
Application Number:
JP35269491A
Publication Date:
November 26, 2001
Filing Date:
December 16, 1991
Export Citation:
Assignee:
MCC Co., Ltd.
International Classes:
H01Q1/27; H01Q21/28; H04B7/06; H04B7/155; (IPC1-7): H04B7/06; H04B7/155
Attorney, Agent or Firm:
Shoji Mizoi