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High-Efficiency Elliptical Slot Antennas With Quartz Superstrates for Silicon RFICs

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2 Author(s)
Edwards, J. M. ; Electrical and Computer Engineering Department, University of California at San Diego, La Jolla, CA, USA ; Rebeiz, G. M.

To increase the efficiency of on-chip patch and slot antennas, a single-layer superstrate is proposed. An analytical model to calculate the radiation efficiency is presented, and a detailed design approach is described. This antenna was implemented at W-band in the IBM CMOS8RF (0.13 \mu {\rm m} ) process. The measured antenna results in a 3.9% impedance bandwidth, an efficiency of 30%, and a gain of 0.7 dBi at 89 GHz, which agrees well with simulations. The gain improvement with a quarter-wave superstrate is experimentally demonstrated to be 6.4 dB, representing a substantial improvement over traditional on-chip patch and slot antennas.

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:60 ,  Issue: 11 )