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Recently, the market pressure towards higher efficiency, smaller size, and lower cost is getting more severe for cellular phone base station equipment. In response to this, JRC has developed the high efficiency DPD Amplifier with a multitechnology feature for the transmitting amplifier which occupies a large part of the cellular phone base station. This amplifier employs the Doherty circuit to achieve high efficiency. The DPD optimized for this amplifier is developed to comply with spurious emission requirements. The achieved high efficiency makes downsizing and cost reduction possible.

Akira Yamada
Hirohisa Hirayama
Takaaki Ishikawa
Yoshitomo Miyatake
Takashi Watanabe