Far field monitor apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 19, 2002
Grant Date -
N/A
app pub date -
Aug 1, 2000
filing date -
Aug 2, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a far field monitor apparatus, each of first and second ILS localizers includes a receiving antenna, a plurality of couplers, a combiner, a receiver, and a first detector. The receiving antenna is formed from a plurality of antenna elements symmetrically arranged in a direction perpendicular to the longitudinal direction of a runway. The receiving antennas of the first and second ILS localizers oppose each other. The couplers are arranged in units of antenna elements to pick up some of signals obtained by the antenna elements in a predetermined amplitude and phase. The combiner combines output signals from the couplers. The receiver receives a combined signal output from the combiner. The first detector detects, on the basis of a receiving signal output from the receiver, a predetermined monitor parameter representing the radiation state of a radio wave radiated from the opposing-side ILS localizer.
First Claim
Other Claims data not available