Wave transmission lines and networks – Coupling networks – Delay lines including long line elements
Patent
1989-09-18
1990-10-23
LaRoche, Eugene R.
Wave transmission lines and networks
Coupling networks
Delay lines including long line elements
333104, 333161, H01P 308, H01P 118
Patent
active
049658662
ABSTRACT:
A very low loss microwave modulator having two phase states: O, .pi.; the modulator comprising the following between an input (E) which receives a pure carrier at a frequency f.sub.O, and an output which delivers a carrier modulated with two phases states: a first switching element (17); in parallel therewith, a second switching element (18) connected in series with a main transmission line (19); and a control system (20) for causing a selected one of the first and second switching elements (17, 18) to be conductive and for causing the other one to be non-conductive. The invention is particularly suitable for microwave transmission.
REFERENCES:
patent: 3346822 (1967-10-01), Levy et al.
patent: 4056792 (1977-11-01), Horwitz et al.
patent: 4105959 (1978-08-01), Stachejko
patent: 4301432 (1981-11-01), Carlson et al.
patent: 4789846 (1988-12-01), Matsunaga et al.
Patent Abstracts of Japan, vol. 10, No. 255, (E--433)[2311], Sep. 2, 1986, & JP--A--61 81 057 (Toshiba Corp.), 04.24.1986.
Patent Abstracts of Japan, vol. 8, No. 53 (E--231)[1490], Mar. 9, 1984 & JP--A--58 206 265 (Nippon Denki K.K.) 12.1.1983.
ALCATEL N.V.
Ham Seung
LaRoche Eugene R.
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