Direct relay equipment

Details Direct relay equipment Direct relay equipment

1987-06-03

1988-08-16

Masinick, Michael A.

Telecommunications

Carrier wave repeater or relay system

With frequency conversion

455 15, 455 17, 379347, H04B 714

Patent

active

047649798

ABSTRACT:
Direct relay equipment includes a first antenna, a second antenna, an up direction circuit connected from the first antenna via a first circulator to the second antenna via a second circulator, and a down direction circuit connected from the second antenna via the second circulator to the first antenna via the first circulator. In the up direction circuit and the down direction circuit, the received signal having a frequency f.sub.1 from the first (or second) antenna is amplified by a microwave amplifier, the output of the microwave amplifier is converted to a signal having a frequency f.sub.2 (sending frequency), the signal having the frequency f.sub.2 is amplified by the same amplifier, and the amplified signal having a frequency f.sub.2 is sent from the second (or first) antenna.

REFERENCES:
patent: 4198600 (1980-04-01), Oguchi et al.
patent: 4253191 (1981-02-01), Oguchi
Patents Abstracts of Japan, vol. 4, No. 56, Apr. 25, 1980, pp. 105, E-8.
Electric Engineering, "Hybrid I.Cs. A Major Factor in Microwave Component Development", Oliver, vol. 43, No. 519, May 1971, pp. 41-43.
8th European Microwave Conference, "Study of a Two Carriers Solid State Straight Through Repeater at 7.5 GHz", Rouffet et al., 9/4-8/78, pp. 620-625.
International Conference on Communications, "Digital Modulation Techniques", Walker et al., Jun. 1973, pp. 28-20-28-24.

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