I. Introduction
Frequency bands between 60 and 110 GHz are used for both military and civil applications that include collision control radar, gigabit WLAN, medical imaging, bio-medical sensing, etc. CMOS technology has emerged as the choice of the semiconductor industry due to advantages of low cost, improved yields, and efficient integration capability. It is shown that several fundamental building blocks of millimeter-wave (mm-wave) systems like power amplifiers [1], [2], voltage controlled oscillators [3], and switches [4] can be integrated using silicon CMOS process.