Indianapolis, Ind. Leveraging proprietary design techniques, Trilithic Inc. says its new series of miniature RF filters deliver the high performance characteristics of typically much larger devices. They are available in a variety of models, ranging from low-cost, surface-mount styles to mil-spec and space-qualified versions that meet stringent requirements for shock, vibration, temperature cycling, as well as other key parameters.
The miniature series filters provide the performance of tubular and LC-type designs in much smaller packages and meet the majority of filter applications including low-pass, high-pass, band-reject and bandpass filters. They can also be used as delay lines, exhibiting excellent control of group delay distortion, said the company.
The company says most applications for the miniature RF filters can be satisfied with low-ripple Chebyshev designs, which combine low passband VSWR, high sensitivity, and high attenuation in the stop bands. However, Butterworth, Bessel, linear phase, Gaussian, and elliptic responses can be developed for specific requirements. The LC filter topology can be customized as well, in order to provide higher rejection on the low side of the passband or arithmetically symmetric rejection around the passband.
The Z series surface-mount types are available in various styles. They can accommodate three sections, and cover a frequency range up to 1.5 GHz. The Y Series, which is larger, can accommodate up to eight sections, and offers a maximum frequency range of 3.5 GHz. The A Series the largest surface-mount type handles a maximum frequency range of 3.5 MHz and can accommodate more complex designs.
Other package styles include TO-8 models with a frequency range up to 1 GHz that accommodate up to six sections, in-line styles to 3.5 GHz that handle up to 10 sections, low-frequency styles that cover up to 500 MHz (and as low as 2 MHz) and can handle 12 sections, and dual-filter types in surface-mount packages that cover up to 3 GHz with eight sections and are designed for channeled receivers that require phase or amplitude-matching in pairs. They can also save board space when used as a filter assembly for the first and second IF.
Other types include form-fit replacements for existing package styles, as well as military and space flight models that meet fine leak test specifications; handle acceleration forces as high as 50 G; survive wide extremes of temperature and humidity, and withstand corrosive environments. Nearly all package styles can be hermetically sealed.
Pricing ranges between $40 to $200, depending on specifications and quantity. Delivery is from stock to eight weeks, depending on specs and quantity.
Call (317) 895-3600