Telecommunications – Transmitter – With feedback of modulated output signal
Patent
1993-11-29
1996-10-08
Eisenzopf, Reinhard J.
Telecommunications
Transmitter
With feedback of modulated output signal
455155, 455123, 455129, 343861, H04B 104
Patent
active
055640869
ABSTRACT:
In a radio transmitter (100) that includes a power amplifier (104) and an antenna (106), a method for enhancing an operating characteristic of the radio transmitter (100) can be accomplished in the following manner. The power amplifier (104) provides a signal (113) to a variable matching network (111), wherein the signal (113) comprises energy to be radiated by the antenna (106). The variable matching network (111) couples the signal (113) to a sampler (112) that is operably coupled to an output of the variable matching network (111 ) and the antenna (106). The sampler (112) samples a forward component (114) and a reflected component (115) of the signal (113). The radio transmitter (100) processes the sampled forward and reflected components (116, 118) to produce a feedback control signal (120). The feedback control signal (120) is used to adjust the variable matching network (111 ), such that an operating characteristic of the radio transmitter (100) is enhanced.
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patent: 4246535 (1981-01-01), Huang et al.
patent: 4493112 (1985-01-01), Bruene
patent: 4704573 (1987-11-01), Turner, Jr.
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Cygan Lawrence F.
Gailus Paul H.
Turney William J.
Yester, Jr. Francis R.
Coffing James A.
Crilly Daniel C.
Eisenzopf Reinhard J.
Motorola Inc.
Sobutka Philip J.
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