Communications transponder

Details Communications transponder Communications transponder

1977-01-03

1978-08-15

Griffin, Robert L.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

325 3, 325 8, 343100CS, H04B 714

Patent

active

041076095

ABSTRACT:
A transponder for use in a communication system for receiving and transmitting electro-magnetic signals, includes a first antenna array operative for receiving a first signal from a first direction and transmitting a second signal, a second antenna array operative for transmitting the second signal in a second direction, and a signal processor coupling the first and second antenna arrays to each other and being operative for receiving the first signal from the first antenna array, for phase shifting the first signal to the second signal, for coupling the second signal to the first antenna array to produce a first transmitted signal possessing a relative null in the radiated electro-magnetic power density distribution in the first direction, and for coupling the second signal to the second antenna array to produce the second transmitted signal possessing a relative maximum in the radiated spatial electro-magnetic power density in the second direction.

REFERENCES:
patent: 3394374 (1968-07-01), Weiss
patent: 3636452 (1972-01-01), Nuding
patent: 3696421 (1972-10-01), Bitler
patent: 3754257 (1973-08-01), Coleman
patent: 3757335 (1973-09-01), Gruenberg

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