Compact 1.5GHz to 2.5GHz multi-band multi-mode power amplifier

Abstract

This paper presents a compact multi-band/multi-mode power amplifier (PA) for mobile terminals. The PA is reconfigurable within the size of 6.2 x 8.05mm² and covers the frequency bands for mobile communications from 1.5GHz to 2.5GHz. The experimental results in terms of gain, output power, and adjacent channel leakage ratio are very close to those of actually-used single-band PAs in mobile terminals. To the best of our knowledge, this is the first time that a compact PA is presented that is less than 50mm² and covers the 1.5, 1.7, 1.8, 1.9, 2.3, and 2.5-GHz bands for GSM, W-CDMA, and LTE modes.