NIC recently developed a narrowband cavity filter at 5745 MHz, perfectly suitable for use in WIFI 5.8 GHz applications. This filter offers a narrow passband of 40 MHz with low passband insertion loss of < 1.5 dB and adjacent channel rejection of >20 dB, built in a compact package size of 3.5 x 3.5 x 1.50 inches plus connectors.