APA Wireless Technologies is an ISO 9001:2008 Certified single-source technology developer and manufacturer of High Performance Super Low Phase Noise PLL Synthesizers, Voltage Controlled Oscillators, Coaxial Resonator Oscillators, YIG Replacement Oscillators, and Non-Ceramic Stripline filters offered in frequencies from 10 MHz to 9 GHz. APA founded in 1992, evolved out of a group of companies that have an established 35-year track record in technical innovation and manufacturing excellence.