Combiners for R.F. power amplifiers

Details Combiners for R.F. power amplifiers Combiners for R.F. power amplifiers

1993-07-29

1995-02-14

Mullins, James B.

Amplifiers

With plural amplifier channels

Redundant amplifier circuits

330 56, 330286, 330295, 333109, H03F 368, H03F 360

Patent

active

053898907

ABSTRACT:
Directional couplers 7.sup.1 -7.sup.20 are used to couple power from r.f. power amplifier modules 5.sup.1 -5.sup.20 to a transmission line 6 or other type of resonator, from which it is withdrawn by directional coupler 8. The power withdrawn from the continuous transmission line, which is an integral number of wavelengths at the operating frequency of the modules in length, is less than the power circulating around the transmission line 6. The balance load may be removed to enable the output load to be combined with the output of another r.f. power amplifier operating a different frequency so that e.g. sound and vision signals can be combined at an aerial and, in the latter case, means may be provided for improving the resonance of the main loop 6.

REFERENCES:
patent: 3986147 (1976-10-01), Carter et al.
patent: 4129840 (1978-12-01), Mok
patent: 4287605 (1981-09-01), Dydyk
patent: 4656438 (1987-04-01), Levinson
Cappucci, "Combining Amplifiers ?, Try Serial-Feed Arrays," Microwaves, Oct. 1976, pp. 36, 37, 40, 41.

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