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Linear power amplifier integrates coupler for power control

Barcelona, Spain—Skyworks Solutions Inc. has started to sample a high-efficiency linear power amplifier (PA) for wideband code division multiple access (WCDMA) handsets.

The SKY77185 is designed to address European market needs for the universal mobile telecommunications system (UMTS) radio access network. Skyworks reduced bill-of-materials (BOM) by including an integrated coupler for power control—typically a discrete component on the reference design. In addition, the PA produces high power added efficiency (PAE) at mid power, which significantly increases talk time.

The SKY77185 3 x 3 x 1 mm band 1 PA with integrated coupler is a fully matched, 10-pad surface mount module developed for WCDMA applications. This small and efficient PA packs full coverage of the 1920-1980 megahertz (MHz) bandwidth into a single compact package.

The single GaAs microwave monolithic integrated circuit (MMIC) contains all active circuitry in the module. The MMIC contains on-board bias circuitry, as well as input and interstage matching circuits.

The device is manufactured using the company's InGaP GaAs heterojunction bipolar transistor (HBT) BiFET process that provides for all positive voltage direct current (DC) supply operation while maintaining high efficiency and linearity. Digital bias control can be used to optimize efficiency at high, mid and low power.

Skyworks Solutions Inc., www.skyworks.com

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