This low pass filter offers a passband from DC to 18000 MHz with 1.0 dB of insertion losses and a high rejection of 20 dB at 20000 MHz. Fitted with SMA connectors, it offers a VSWR of 1.7:1 and a power handling of 2 W average.
Thanks to an high temperature stability substrate, its specifications stays very stable over it temperature operating range (-40 ° C to +85 ° C.).
This Waveguide Band Stop Filter allows you to sharply reject (40 dB) the 7800 – 7880 MHz frequency range while avoiding to degrade your signal from 7750 to 7765 MHz and from 7900 to 8340 MHz. Indeed it show very little insertion losses (0.4 dB) and a vswr of 1.15:1 max.
This Waveguide Band Stop Filter allows you to sharply reject (25 dB) the 29700 – 29900 MHz frequency range while avoiding to degrade your signal from 27500 to 29500 MHz and from 30000 to 31000 MHz. Indeed it show very little insertion losses (1 dB) and a vswr of 1.5:1 max.
Depending of bandwidth, we can choose among several technologies : cavity, slabline, printed circuits or lumped elements for the most commons.
Each technology has its qualities and defaults, compromises often have to be made, for example, upper band rejection of a bandpass filter will be limited due to harmonic effect, just like passband of highpass filter will not tend to infinite because of spurious inherent of elements of the structure.
A mechanical filter will have good insertion loss thanks to a high quality factor, but price will also be higher than a printed circuit filter. We have to take into consideration performances to avoid overqualified products, if a standard part can make the deal at a lower cost.
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