Digital RF - Tunable Filters
Low insertion loss digitally tuned filters
225 MHz - 520 MHz (VHF High / UHF)
30 MHz - 90 MHz or 200 MHz - 400 MHz
250 tuning steps, 1 watt
±1% passband center frequency accuracy
3 dB or less insertion loss
Digital radio, software defined radio, cognitive radio… higher reliability, more coverage, and increased data capacity. MtronPTI’s custom digitally tuned and switched filters prevent IM products in the receiver by cleaning the spectrum before the LNA. Where co-site interference is a problem, higher power filters reduce interfering transmitter broadband noise.
Lumped Element (LC)
MtronPTI lumped element (LC) filters allow true surface mount wash-proof assembly. Solder sealed or laser welded perimeter prevents performance shifts during or after pre and post wash. Hermetic thru hole and connectorized versions are perfect for space and high power applications.
High power LC filters, like the 200 watt 25 MHz lowpass filter, are qualified for harsh environment and mobile applications where immunity to vibration and wide temperature extremes are mission critical.
Evanescent Mode = high power, low loss and small size
Watts to kilowatts / harsh environment / high reliability
100 MHz – 20 GHz
1% - 80% bandwidth
Evanescent mode in the 8906 Link 16 cavity / combline filter yields 300 Wattspeak in a 2.75” x 1.3” x 0.6” sealed package, ideal for airframe or portable applications.
MtronPTI’s UF9193 700 MHz dual band reject cavity filter uses a mixed design with TM mode dielectric and TEM coaxial resonators to provide high Q and < 1 MHz bandwidth (0.15%) in a 20% to 30% smaller package than full dielectric puck designs. The UF9193 is temperature compensated and has a fully sealed light-weight die cast housing.
With frequencies to 20 GHz, cavity filters with laser welded packages perform in harsh environments. UF9382 is a 9.9 GHz filter with less than 1.5 dB passband attenuation.
MtronPTI crystal filters are perfect for narrow bandwidth, low distortion, high frequency fundamental operation and also available as matched sets to improve signal to noise performance in mission critical applications.
Very low intermodulation (IM) distortion filters prevent nonlinearities which can confuse receiver demodulation schemes. MtronPTI uses nearly fifty years crystal filter making experience and customized test methods that insure initial technical performance and volume lifetime demands are met.
High frequency fundamental designs offer wider bandwidth and lower insertion loss for data communications applications.
Phase and amplitude matched sets for AESA radar, EW and missile applications – two to eight filters, matched and temperature compensated.
MtronPTI Ceramic Filters offer wide center frequency range, narrow to wide bandwidth and elevated power handling. Ceramic filters can achieve a higher Q than lumped element in a comparable size package.
Custom non-standard low insertion loss designs involving novel cross-coupling schemes fit defense and space applications with unique frequency and contour plans. Hybrid designs with multiple poles, capacitive coupling and integrated LC structures combined with careful tuning and diplexer/multiplexer solutions are available to meet the most complex needs.