http://www.cirocomm.com/

Cirocomm Technology Corp. was established in 1996 as Taiwan’s first microwave ceramic components design and manufacturing company. Cirocomm headquarter is located in Taoyuan City Taiwan, and its main production facility is based in Guantian Dist. in Tainan City Taiwan.
They design and manufacture RF (radio frequency) wireless components including DR filters, PCB/FPC antennas, patch antennas, active antennas, external antennas and more.