Divided LLBFN/HMPA transmitted architecture

Details Divided LLBFN/HMPA transmitted architecture Divided LLBFN/HMPA transmitted architecture

1988-09-23

1990-02-13

Tarcza, Thomas M.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a steerable array

342368, 455 12, H01Q 322

Patent

active

049010859

ABSTRACT:
A communications satellite uses a low level beam forming network connected to a hybrid matrix power amplifier section which has output ports connected to an array of radiating elements. Several beams emanate from the array and at least some of the elements are used in common for more than one beam to achieve beam overlap. The hybrid matrix power amplifier section which provides flexible power distribution, is formed of several relatively small hybrid matrix power amplifiers instead of a single relatively large one. This enables considerable advantages to be achieved, particularly dispensing with the requirement for port selection and reducing the size of the device, without compromising the performance.

REFERENCES:
patent: 4414550 (1983-11-01), Tresselt
patent: 4499471 (1985-02-01), Luh
patent: 4633259 (1986-12-01), Hrycak
patent: 4638317 (1987-01-01), Evans
patent: 4652379 (1987-03-01), Rudish et al.
patent: 4727421 (1988-02-01), Koga
Shunichiro Egami and Makoto Kawai, "An Adaptive Multiple Beam System Concept", May 1987, vol. SAC-4, No. 5, IEEE Journal On Selected Areas of Communications.

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