High Efficiency Transmitter Using Varactor Based Dynamic Load Modulation

• This paper presents results for a dynamic loadmodulation transmitter where an existing 1 GHz LDMOSpower amplifier is combined with a varactor based tuneableload network to produce a dramatic efficiency improvementfor modulated signals. The transmitter is combinedwith a dedicated linearization method to achieve anaverage PAE of 53% for a WCDMA signal at 7 dB PAPR.The results demonstrate the potential of dynamic loadmodulation for future transmitters combining flexibilityand high efficiency at a low cost.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Telekommunikation (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Telecommunications (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

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