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BRF 70/6-150

Band-reject (notch) filter for the 450 MHz Band

  • The BRF 70/6-150 is a 6-resonator notch-filter using full-length ¼ λ cavities.

  • This filter rejects a narrow band of frequencies and passes all others.

  • The filter can be applied both in connection with transmitters and receivers to attenuate interfering signals which cause cross modulation effects.

DESCRIPTION

  • The filter can be employed as a single component or it can act as an integrated part of a complete multi-coupling system.

  • The BRF 70/6-150 can be tuned within the complete 380 - 470 MHz band. Careful design and choice of materials ensure reliable operation over a wide temperature range.

  • The housing is made of extruded aluminium, the chassis of brass, and teflon insulation has been applied in the coaxial cables and in the connectors.

  • The filter is coated with black vinyl to prevent corrosion.

ORDERING DESIGNATIONS

TYPE PRODUCT NO.
BRF 70/6-150-N(f) 200001244

SPECIFICATIONS

ELECTRICAL  
MODEL BRF 70/6-150
FILTER TYPE Band-reject (notch) filter
TUNING RANGE 380 - 470 MHz
MAX. INPUT POWER 50 W @ IL < 1.0 dB
150 W @ IL < 0.5 dB
INSERTION LOSS
(Outside reject bandwidth: Fc ± 10 MHz)
< 0.5 dB
REJECT ATTENUATION (Notch depth) > 25 dB @ 5 MHz BW (See curve)
IMPEDANCE Nom. 50 Ω
SWR 20 - 380 MHz: < 1.5
420 - 530 MHz: < 2.0
MECHANICAL  
TEMP. RANGE –30° C → +60° C
CONNECTORS N-female (others on request)
DIMENSIONS (L x W x H) 260 x 250 x 50 mm /
10.24 x 9.84 x 1.97 in.
WEIGHT Approx. 2.5 kg / 5.51 lb.

MOUNTING DETAILS

 

TYPICAL RESPONSE CURVES

 

PLEASE NOTE

The notch filter resonators can also be separately tuned to three different frequencies in a “multiple notch” configuration, but the attenuation on each frequency is then only approximately one third of the normal attenuation when all notches work together.

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