In this paper, on-chip antennas applicable to ultra low power wireless transceiver are designed and evaluated. Using $0.18{mu}m$ SiGe MMIC process, 4 types of antenna with $1{ imes}1mm^2$ dimensions are fabricated. The on-wafer measurement in a microwave probe station is conducted to measure the input VSWR and antenna performance of the designed on-chip antenna. Performance evaluation results show that developed antennas can be easily integrated into one-chip RF transceiver for ubiquitous applications, including WPAN and human body communications.