Patent ID: 6650200
Filing Date: 2003-11-18
Classification: H01P

Abstract:
A circuit for dynamically combining power amplifier outputs, said circuit comprising:four power input ports; an output port; and, four transformers, each of said transformers connected to one of said power input ports, each of said four transformers providing four separate paths to said output port, each of said four paths having a switch to ground, said four paths having impedances of approximately 50 Ohms, 70.7 Ohms, 86.8 Ohms and 100 Ohms, wherein in the condition of one of said power input ports being active, said transformer connected to said active input port selectively provides 50 Ohms impedance, and wherein in the condition of two of said power input ports being active, each of said transformers connected to said active input ports selectively provide 70.7 Ohms impedance, and wherein in the condition of three of said power input ports being active, each of said transformers connected to said active input ports selectively provide 86.6 Ohms impedance, and wherein in the condition of four of said power input ports being active, each of said transformers connected to said active input ports selectively provide 100 Ohms impedance.