Communications: radio wave antennas – Antennas – With vehicle
Patent
1988-11-16
1989-10-10
Hille, Rolf
Communications: radio wave antennas
Antennas
With vehicle
343771, H01Q 1310
Patent
active
048735310
ABSTRACT:
The transponder is constituted by a waveguide (1) having a large face (2) including longitudinal slots (3) and pairs of slots distributed along the axis (WW') of the large face at one pair per n longitudinal slots. Each pair is constituted by two transverse slots (4, 4') situated facing a longitudinal slot. The presence of a pair corresponds to a one value bit and the absence of a pair corresponds to a zero value bit. The longitudinal slots receive radiation from a transmit antenna (A1) including a low frequency and a high frequency. They radiate to a first receive antenna (A2) using radiation at the high frequency. The pairs radiate to a second receive antenna (A3) using radiation at the low frequency. The antennas are fixed relative to one another and they move relative to the transponder.
REFERENCES:
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patent: 3281591 (1966-10-01), Takeya
patent: 3328800 (1967-06-01), Algeo
patent: 3348227 (1967-10-01), Rolfs
patent: 3467962 (1969-09-01), Laplume et al.
patent: 3599216 (1971-08-01), Paine et al.
patent: 3648172 (1971-03-01), Nakahara et al.
patent: 4716415 (1987-12-01), Kelly
Degauque Pierre
Duhot Denis
Heddebaut Marc
Mainardi Pierre
Hille Rolf
Societe Anonyme dite : ALSTHOM
Wimer Michael C.
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