A line of LC bandpass filters prevents interference to Iridium telephone signals.
A series of compact inductive-capacitive (LC) bandpass filters from Trilithic have been developed for use in the Iridium telephony band from 1616.0 to 1626.5 MHz. They operate with maximum insertion loss of 2.6 dB while achieving at least 15-dB isolation of Global Positioning System (GPS) L1 and 70-dB isolation of GPS L2 signals. The filters also offer 45-dB isolation of signals in the 1710-to1850-MHz band and 55-dB isolation for frequencies beyond that band through 10 GHz. The filters, which are available in versions for printed-circuit-board (PCB) mounting and with coaxial connectors, measure just 0.5 x 0.5 x 2.0 in.
Trilithic, Inc., 9710 Park Davis Dr., Indianapolis, IN 46235; (317) 895-3600, (800) 344-2412, FAX : (317) 895-3613, www.trilithic.com.