A telecommunication system having multibeam equally loaded transmitters, input beams, input beam power dividers, a set of input phase shifters, power combiners, power amplifiers, output power dividers, a set of output phase shifters, feed elements, output power combiners, reflector antenna, output beams, receive beams, receiving areas, receive terminals and comprised of;
- a transmitting system comprised of:
- a plurality of input beams 1 to N;
- a plurality of input power dividerds, 1 to N, each of which divides one of the input beams into N input equally power-divided signals having zero phase difference therebetween;
- a plurality of input fixed phase shifters, each connected to an input equally power-divided signal;
- a plurality of input power comniners 1 to N, each for combining a set of fixed phase-shifted, input equally power-divided signals, wherein a set includes a fixed phase-shifted, input equally power-divided signal from each of the plurality of input power dividers;
- a plurality of power amplifiers 1 to N, each for amplifying a respective output of the input power combiners;
- each power amplifier being equally loaded under dynamic traffic conditions decreasing the total transmitter power requirement and increasing the transmitter efficiency;
- a plurality of output power dividers 1 to N, each of which equally divides a respective power amplifier output signal into N output equally power-divided signals having zero phase difference therebetween;
- a plurality of output fixed phase shifters, each connected to a respective output equally power-divided signal;
- values of fixed phase shifts in the input and the corresponding output, for a 4 beam system, being given in the following table I:
- TABLE I ______________________________________ 4 BEAM SYSTEM INPUT BEAM INPUT PHASE OUTPUT PHASE OUTPUT BEAM ______________________________________ 61 0 0 84 90 270 90 270 180 180 62 90 270 83 180 180 0 0 90 270 63 90 270 82 0 0 180 180 90 270 64 180 180 81 90 270 90 270 0 0 ______________________________________
- values of phase shifts in the input and the corresponding output, for a 16 beam system, being given in the following table II:
- TABLE II ______________________________________ 16 BEAM SYSTEM IN BEAM IN PHASE OUT PHASE OUT BEAM ______________________________________ 61 0 0 81 90 270 90 270 180 180 90 270 180 180 180 180 270 90 90 270 180 180 180 180 270 90 180 180 270 90 270 90 0 0 -- -- 62 90 270 82 180 180 180 180 270 90 180 180 270 90 270 90 0 0 0 0 90 270 90 270 180 180 90 270 180 180 180 180 270 90 -- -- 63 90 270 83 180 180 180 180 270 90 0 0 90 270 90 270 180 180 180 180 270 90 270 90 0 0 90 270 180 180 180 180 270 90 -- -- 64 180 180 84 270 90 270 90 0 0 90 270 180 180 180 180 270 90 90 270 180 180 180 180 270 90 0 0 90 270 90 270 180 180 -- -- 65 90 270 85 180 180 0 0 90 270 180 180 270 90 90 270 180 180 180 180 270 90 90 270 180 180 270 90 0 0 180 180 270 90 -- -- 66 180 180 86 270 90 90 270 186 180 270 90 0 0 180 180 270 90 90 270 180 180 0 0 90 270 180 180 270 90 90 270 180 180 -- -- 67 180 180 87 270 90 90 270 180 180 90 270 180 180 0 0 90 270 270 90 0 0 180 180 270 90 180 180 270 90 90 270 180 180 -- -- 68 270 90 88 0 0 180 180 270 90 180 180 270 90 90 270 180 180 180 180 270 90 90 270 180 180 90 270 180 180 0 0 90 270 -- -- 69 90 270 89 0 0 180 180 90 270 180 180 90 270 270 90 180 180 180 180 90 270 270 90 180 180 270 90 180 180 0 0 270 90 -- -- 70 180 180 90 90 270 270 90 180 180 270 90 180 180 0 0 270 90 90 270 0 0 180 180 90 270 180 180 90 270 270 90 180 180 -- -- 71 180 180 91 90 270 270 90 180 180 90 270 0 0 180 180 90 270 270 90 180 180 0 0 270 90 180 180 90 270 270 90 180 180 -- -- 72 270 90 92 180 180 0 0 270 90 180 180 90 270 270 90 180 180 180 180 90 270 270 90 180 180 90 270 0 0 180 180 90 270 -- -- 73 180 180 93 90 270 90 270 0 0 270 90 180 180 180 180 90 270 270 90 180 180 180 180 90 270 0 0 270 90 270 90 180 180 -- -- 74 270 90 94 180 180 180 180 90 270 0 0 270 90 270 90 180 180 180 180 90 270 90 270 0 0 270 90 180 180 180 180 90 270 -- -- 75 270 90 95 180 180 180 180 90 270 180 180 90 270 90 270 0 0 0 0 270 90 270 90 180 180 270 90 180 180 180 180 90 270 -- -- 76 0 0 96 270 90 270 90 180 180 270 90 180 180 180 180 90 270 270 90 180 180 180 180 90 270 180 180 90 270 90 270 0 0 ______________________________________
- a plurality of output power combiners 1 to N, each for combining a set of fixed phase-shifted, output equally power-divided signals, wherein a set includes a fixed phase-shifted, output equally power-divided signal from each of the plurality of the output power dividers;
- and
- a plurality of feed elements 1 to N, each connected to an output of a respective output power combiner and each located offset from the prime focus of a reflector antenna, for forming a plurality of output beams 1 to N;
- and
- wherein signals arriving at the feed elements for an input beam "b", of the 1 to N beams, corresponding to an input beam "b", arrive in phase and add together, while signals arriving at said feed elements for the output beam "b" corresponding to remaining input beams which arrive in antiphase and cancel one another by appropriate selection of said two sets of fixed phase shifters;
- a receiving system comprising;
- 1through n received beams, corresponding to transmit, beams each having a service area
- each said receive area having 1 through z receive terminals;
- each receive terminal having a receive reflector, a prime focus feed element and a receiver;
- and
- one telecommunication system having said corresponding input beams, said output beams, said receive beams, and receive terminals.