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BRF 70/6-150

Band Reject FiltersBRF 70/6-150

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

Description

  • 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.
  • 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.

Specifications

Electrical
Model BRF 70/6-150
Filter Type Band-reject (notch) filter
Frequency 380 - 470 MHz
Max. Input Power 50 W @ IL < 1.0 dB
150 W @ IL < 0.5 dB
Pass Band Insertion Loss < 0.5 dB
Impedance 50 Ω
Reject Attenuation > 25 dB @ 5 MHz BW (See curve)
VSWR 20 - 380 MHz : < 1.5 :1
420 - 530 MHz : < 2.0:1
Mechanical
Connection(s) N(f)
(BNC(f), TNC(f), UHF(f) or SMA(f) on request)
Dimensions 260 x 250 x 50 mm /
10.24 x 9.84 x 1.97 in.
Weight Approx. 2.5 kg / 5.51 lb.
Environmental
Operating temperature range -30 °C to +60 °C

Ordering Designations

Model Product No.
BRF 70/6-150-N(f) 200001244

Typical response curves

BRF 70 6 150 curve

 

BRF 70 6 150 curve 10 540

 

Mounting Details

BRF 70 6 150 Hole placing

All dimensions are given in mm.

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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