发明名称 |
MLS WITH INTERFERENCE PROTECTION |
摘要 |
In a microwave landing system or MLS, the bearing and/or elevation angular messages are in two parts a preamble transmitted by a sector antenna and a specific message transmitted by an electronic scan or scanning beam antenna. As the gain of the sector antenna is below that of the scanning beam antenna, the preamble is much more vulnerable to scanning than the message. According to the invention, a preamble is transmitted, which is reinforced in a narrow angular sector and movable so as to cover the sector covered by the sector antenna by superimposing the radiation patterns of the sector antenna and the scanning beam antenna in said direction. |
申请公布号 |
DE3278582(D1) |
申请公布日期 |
1988.07.07 |
申请号 |
DE19823278582 |
申请日期 |
1982.12.23 |
申请人 |
THOMSON-CSF |
发明人 |
HETYEI, JOSEPH;LETOQUART, BRUNO |
分类号 |
G01S1/54;G01S1/04;G01S1/56;G08G5/00;H01Q3/26;(IPC1-7):G01S1/04 |
主分类号 |
G01S1/54 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|