ISO-less, SAW-less open-loop polar modulation transceiver for 3G/GSM/EDGE multi-mode/multi-band handset

In this paper, a new 3G/GSM/EDGE multimode/ multi-band transceiver that achieves both the elimination of TX-SAW filter and the isolator using an open-loop polar modulation transmitter is presented. Sufficient ACLR performance is accomplished by a combination of parts-to-parts calibration and temperature offset compensation. ACLR meets 3GPP target specification at VSWR=3∶1, with Rx band noise at PA output in UMTS band I of −132.3dBm/Hz thus does not degrade receiver sensitivity. This paper includes design details and experimental results.