BPF 4/4

Band-Pass Filter for the 80 MHz Band

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BPF 4/4

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BPF 4/4
Electrical
Model BPF 4/4
Filter Type Band-Pass Filters
Frequency 66 – 88 MHz
Max. Input Power 50 W
Insertion Loss ≤ 1.4 dB (typ. 1.2 dB)
Impedance 50 Ω
Reject Attenuation See curves
VSWR < 1.5:1
Bandwidth 3 – 4 MHz
Environmental
Operating temperature range -30 °C to +60 °C
Mechanical
Connection(s) N(f)
(BNC(f), TNC(f), UHF(f) or SMA(f) on request)
Historic Brand Amphenol Procom
Dimensions Approx. 165 x 104 x 33 mm /
6.50 x 4.10 x 1.30 in.
Weight Approx. 0.5 kg / 1.10 lb.
  • The BPF 4/4 is a 4-helical resonator band-pass filter with aperture-coupling between the resonators.
  • This filter can be used as a preselector to protect a receiver against interference from transmissions out of the pass-band, or it can be used to reduce spurious output from a transmitter with up to 50 W of output power.
  • The BPF 4/4-C-version fits directly into our receiver multicouplers PRO-AR4G-N… etc.
  • The filter can be tuned within the entire 66 – 88 MHz band. It has very small dimensions owing to the use of helical resonators. Careful design and choice of materials ensure reliable operation over a wide temperature range.
  • The housing is made of extruded aluminium, the chassis of steel, and teflon insulation has been used in the coaxial cables and in the connectors.
  • The filter is coated with black vinyl to prevent corrosion.

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Model Product No. Model Add To Quote

BPF 4/4-N(f)

 200000887 BPF 4/4-N(f)

BPF 4/4-4-N(f)

 200002757 BPF 4/4-4-N(f)

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Typical response curves

BPF 4/4

BPF-4-4-curve

BPF 4/4-4

BPF-4-4-4-curve

Mounting Details


All dimensions are given in mm [in.]