Ceramic patch antenna for high temperature applications

For a high-temperature stable SAW device, serving as both an RFID-tag and a temperature sensor, a hermetic case has to be provided to protect the SAW device from moisture, contaminations and harsh environments. Furthermore, for wireless readout a high-temperature stable antenna has to be connected to the SAW device. In order to fulfil both purposes adequately an alumina based ceramic package was designed accordingly and successfully tested up to 400degC