57-45-04 Combline Filter/Preselector
Typical Insertion Loss: 3.0 dB
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Frequency Range, MHz 450-470
Type Combline
Insertion Loss Bandwidth, dB 3
Pass Bandwidth, MHz 4
Return Loss, dB (VSWR) 20 (1.22)
Typical Selectivity, dB @ MHz 38 @ 5
Temperature Range, ºC -30 to +60
Input Power, Watts Rx only
Connectors, Antenna/Output N-F/N-F
Finish Black
Dimensions H x W x D, in (mm) 5.25 x 19 x 4.5 (133 x 686 x 114)
The combline filters are designed for minimizing interference from adjacent channels and outside systems. They are available in a wide range of bandwiths and frequency splits. Used in front of a wideband receiver multicoupler, the preselectors narrow the passband to the desired bandwidth. Each filter is temperature-compensated for operation between -40ºC to +60ºC. Each filter has silver-plated loops and tuning rods.
Our preselectors are available in a wide range of frequency splits, bandwidth and cavity sizes.
• Temperature compensation: ensures frequency stability
• High attenuation: minimizes desense and interference from adjacent systemsOther preselectors are also available. They include comblines and our full line of cavity-based preselectors. Sizes range from the very compact 1” helical filter to the very selective 6.625” cavity preselector. Please contact a technical support technician for consultation.
Specify working frequency, bandwidth, power and isolation required
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