Abstract

In this paper a compact and highly linear monolithic integrated circuit (MMIC) suitable for zero-IF Bluetooth receiver is described. The prototype is designed in order to overcome the drawbacks that homodyne receivers present, like flicker noise, LO leakage and sensitivity to the 2-nd, 3-rd order intermodulation products. For these tasks a passive sub-harmonic topology has been utilized. The fabricated prototype exhibites a 3-rd order intercept point of +30dBm, 2-nd order intercept point of +98dBm, conversion loss of 8dB, 1-dB compression point of +4 dBm and better than 50dB small signal isolation RF and LO ports.