A 60-GHz coplanar waveguide (CPW)-fed post-supported
patch antenna is presented using micromachining technology.
In the proposed structure, the radiating patch and the feed
line network can be optimized separately with a substrate. The
antenna performance is improved by elevating the patch in the air.
A patch array antenna is also designed with a simple feed network.
The fabricated antenna shows broad band characteristics such as
10 dB bandwidth of 4.3 GHz from 58.7 GHz to 64.5 GHz in the
single patch antenna and 8.7 GHz from 56.3 GHz to 65 GHz in
2 1 patch array antenna.