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BPBR 2/3 / BRBP 2/3

Band-Pass/Band-Reject Filters for the 160 MHz Band
Description
  • The BPBR 2/3… and the BRBP 2/3… are 3-cavity pass-reject filters, which pass one frequency or frequency band and reject another in immediate vicinity of the pass frequency.
  • The filters are delivered in two basic models: The BPBR-types have the reject range on the high side of the pass frequency and the BRBP-types have the reject range situated on the low side of the pass frequency.
  • These filter types can be used to protect a receiver against interference from a nearby transmitter. The filters are tuned to reject the interfering signal. Pass-reject-type filters are applied when the spacing between the utility signal and the interfering signal is so small, that the slope steepness of normal band-pass filters or notch filters are not sufficient enough to provide adequate rejection.
  • These filters are primarily intended to pass and reject two single frequencies, but the filters can also be tuned to pass and reject several single frequencies or to having a certain pass and reject port bandwidth. In these cases, factory-tuning is recommended.
  • Both the BPBR 2/3… and the BRBP 2/3… are delivered in a high-band and a low-band version tunable within 136 – 154 and 152 – 175 MHz, respectively. These models are again divided into submodels, each dedicated to work with a certain spacing between the pass frequency and the reject frequency. See “Ordering information” below.
  • The filter has very small physical dimensions owing to the use of high-Q, temperature compensated helical resonators.
  • The housing is made of extruded aluminium, the chassis of passivated steel, and teflon insulation has been applied in the rigid coaxial cables and in the connectors.
  • The filter is black vinyl coated to prevent corrosion.
Specification
Electrical
Model BPBR 2/3 / BRBP 2/3
Filter Type Band-Pass / Band-Reject Filters
Frequency 136 – 175 MHz
Max. Input Power 50 W
Pass Band Insertion Loss Single-channel tuned: < 1.0 dB
Multi-channel tuned 1.5 MHz BW: < 1.2 dB
(at 4.5 MHz spacing)
Impedance 50 Ω
Pass-Reject Spacing 4 – 10 MHz (see table)
Reject Attenuation Single channel tuned: > 75 dB
Multi channel tuned 1.5 MHz BW: > 50 dB
VSWR < 1.5:1
Environmental
Frequency Stability Approx. 5 ppm / °C
Operating temperature range -30 °C to +60 °C
Mechanical
Connection(s) BNC(f)
Historic Brand Procom
Dimensions 163 x 77 x 33 mm / 6.42 x 3.03 x 1.30 in.
Weight Approx. 0.38 kg / 0.84 lb.
Ordering Codes
Model Product No. FrequencyAdditional Information

BPBR 2/3L-4/6

 200001312 138 – 156 MHz SPACING: 4 – 6 MHz

BRBP 2/3L-4/6

 200001451 138 – 156 MHz SPACING: 4 – 6 MHz

BPBR 2/3L-6/8

 200001310 138 – 156 MHz SPACING: 6 – 8 MHz

BRBP 2/3L-6/8

 200001453 138 – 156 MHz SPACING: 6 – 8 MHz

BPBR 2/3L-8/10

 200001311 138 – 156 MHz SPACING: 8 – 10 MHz

BRBP 2/3L-8/10

 200001454 138 – 156 MHz SPACING: 8 – 10 MHz

BPBR 2/3H-4/6

 200001304 152 – 175 MHz SPACING: 4 – 6 MHz

BRBP 2/3H-4/6

 200001444 152 – 175 MHz SPACING: 4 – 6 MHz

BPBR 2/3H-6/8

 200001305 152 – 175 MHz SPACING: 6 – 8 MHz

BRBP 2/3H-6/8

 200001448 152 – 175 MHz SPACING: 6 – 8 MHz

BPBR 2/3H-8/10

 200001307 152 – 175 MHz SPACING: 8 – 10 MHz

BRBP 2/3H-8/10

 200001449 152 – 175 MHz SPACING: 8 – 10 MHz
Additional Information
Ordering information

If pass and reject frequencies are stated when ordering, the filters are delivered factory-adjusted. Ordering example: BRBP 2/3…, LOW: 149.5 MHz, HIGH: 154.0 MHz. In this case, further information is not required.

When ordering untuned filters please use the model selection table above to select the appropriate ordering designation for the desired filter type.

Diagrams

TYPICAL RESPONSE CURVES

MOUNTING DETAILS

All dimensions are given in mm [in.]

All dimensions are given in mm [in.]

TYPICAL RESPONSE CURVES,

PROCOM A/S reserves the right to amend specifications without prior notice
PROCOM A/S • Smedetoften 12 DK 3600 Frederikssund • Denmark
Generated : 2026-06-24 Version 1