High Power Hopping Filter Navy SBIR FY2009.1 Sol No.: Navy SBIR FY2009.1 Topic No.: N091-075 Topic Title: High Power Hopping Filter Proposal No.: N091-075-0624 Firm: WaveCon 1432 Mandeville Place Escondido, California 92029 Contact: Kenneth Johnson Phone: (760) 747-6922 Web Site: www.waveconsoft.com Abstract: This SBIR analyzes approaches for high power VHF hopping filters in which eight filters are used in a multi-coupler configuration so that a single antenna can provide signals to eight SINCGARS radios. Three approaches were studied: 1) a filter with series connected diodes, 2) a filter with shunt connected diodes and 3) a combline filter. A series input L-C bandpass filter is described which can meet the high power, tunability, insertion loss and out-of-band rejection. A series cascade of two filters is used to get the out-of-band rejection. Tuning is done by use of multiple pin diodes/capacitors combination in which the capacitor combinations are selected by pin diode switching. A transient analysis was done to determine the required voltage and current capability for the devices. Devices are available which will withstand the high power, current, and voltage. The multi-coupler provides a switch around the second of the 2-filter cascade to permit improved radio performance. A T/R Switch/limiter circuit prevents the 50 watts from damaging the radios. An analysis done on eight hopping filters in a multi-coupler showed that there was little interaction between the filters. Benefits: This program represents a significant advance in the state-of-the-art inn tunable filters. When developed, these filters will permit high power wideband fast tuning of filters with large out-of-band rejection. This will particularly benefit the navy in its need for a single antenna which will provide transmit and receive signals to multiple SINCGRS radios. The technology developed will have application for radios to UHF frequencies Return