Bandpass Filters Pass Iridium Band

Jan. 10, 2013

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.

About the Author

Jack Browne | Technical Contributor

Jack Browne, Technical Contributor, has worked in technical publishing for over 30 years. He managed the content and production of three technical journals while at the American Institute of Physics, including Medical Physics and the Journal of Vacuum Science & Technology. He has been a Publisher and Editor for Penton Media, started the firm’s Wireless Symposium & Exhibition trade show in 1993, and currently serves as Technical Contributor for that company's Microwaves & RF magazine. Browne, who holds a BS in Mathematics from City College of New York and BA degrees in English and Philosophy from Fordham University, is a member of the IEEE.