Receiver Preselector Filters
RFI provides a wide variety of receiver preselectors. Used to reduce broadband noise and high levels of out-of-band transmitter carrier interface. Typically inserted between an Rx only antenna and the receiver distribution amplifier, a suitable receiver preselector can be used to provide additional filtering when required between a duplexer and receiver distribution amplifier.
If you require multicoupling not shown here, please contact your local RFI sales office.
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Lumped Constant
Where space and cost is at a premium, a lumped constant filter is ideal to use at lower frequency ranges.
Coupled Cavity Resonators
Series coupled helical resonators provide a good building block for broader pass bandwidths and greater isolation when required. The compact size of helical resonators makes them ideal for use in confined spaces and for fitting onto 19" rack trays.
- 130-275 MHz (103 KB)
- 215-420 MHz (62 KB)
- 400-530 MHz (61 KB)
- 380-700 MHz (34 KB)
- 800-1000 MHz (64 KB)
Milled Band Pass
Milled aluminium filters offer frequency response selectivity comporable or exceeding many larger multi-cavity models. The efficient size-to-performance form factor of the milled technology provides an effective solution in deployments with challenging installation space constraints. DC grounding within the filter assists with the surge suppression and and excellent stability across a wide temperature range. Milled filters can be mounted on 19" rack mountable front panels, the height of which dependant on the filter size.
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