RF Band Pass Filters are high frequency filters that are used to block unwanted signals in the wireless system. Band pass filters have a center frequency and a bandwidth, they only allow signals which lie within the specified bandwidth to pass through. Signals outside this bandwidth are attenuated considerably. When searching or selecting a RF band pass filter, here are the parameters that you should consider:
Type: There are many types of BPF filters - SAW, Cavity, Notch, Ceramic etc. The type can be selected based on the application and configuration of the system where you plan to integrate the filter.
Frequency: The frequency of a BPF filter can be specified in two ways. The first is a simple minimum and maximum frequency - The filter will allow a signal between the min and max frequency to pass and attenuate any signals outside this range. The other way to specify the frequency is to state a center frequency and the bandwidth, the passband can be calculated by min = Center Frequency - BW/2 and max = Center Frequency + BW/2.
Insertion Loss: Every filter no matter how well made will have some loss in the pass band. The lower the insertion loss the better the performance of the filter.
Attenuation/Isolation: This is another very important parameter, it tells you the level attenuation or isolation for any signal outside the pass band.
everything RF has listed RF band pass filters from the leading manufacturers. Use the filters to find and compare filter products across manufacturers. Download datasheets and get quotations on products that meet your requirement. Your inquiry is directed to the manufacturers and their distributors who will get back to you directly.
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