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BRF 70/...-250

Band-Reject Filters for the 450 MHz Band

DESCRIPTION

High power base station band-reject filters for the 380 – 470 MHz range.

The use of large ø250 mm cavities means a high Q,

resulting in a very narrow notch bandwidth.

The large dimensions also mean a high power rating.

Unloaded Q of a single cavity is approx. 8000.

High frequency stability on temperature and power.

19” mounting brackets are available as an option.

ORDERING DESIGNATIONS

TYPE PRODUCT NO.

BRF 70/1-250 200001235

BRF 70/2-250 200001600

BRF 70/3-250 200001668

SPECIFICATIONS

ELECTRICAL

MODEL BRF 70/1-250 BRF 70/2-250 BRF 70/3-250

FREQ. RANGE 380 - 470 MHz 380 - 470 MHz 380 - 470 MHz

MAX. INPUT

POWER

350 W @

0.5 dB IL

200 W @

1.0 dB IL

350 W @

1.0 dB IL

200 W @

2.0 dB IL

350 W @

1.5 dB IL

200 W @

3.0 dB IL

ATTENUATION See figure 1 See figure 2 See figure 3

1 dB NOTCH BANDWIDTH

1 ‰ of fc 1 ‰ of fc 1 ‰ of fc

IMPEDANCE Nom. 50 Ω Nom. 50 Ω Nom. 50 Ω

SWR < 1.5 < 1.5 < 1.5

MECHANICAL

TEMP.

RANGE

RH 0-90%

non-condensing

–30° C →

+60° C

–30° C →

+60° C

–30° C →

+60° C

FREQ.

STABILITY

Approx. 1.5

ppm/° C

Approx. 1.5

ppm/° C

Approx. 1.5

ppm/° C

CONNECTORS N-female N-female N-female

DIMENSIONS ø250 x

400 mm

L:250 x W:500

x H:400 mm

L::250 x W:750

x H:400 mm

WEIGHT Approx.

2.8 kg

Approx.

5.2 kg

Approx.

9.6 kg

TYPICAL RESPONSE CURVES

Figure 1

TYPICAL RESPONSE CURVES

Figure 2

TYPICAL RESPONSE CURVES

Figure 3

PROCOM A/S reserve the right to amend specifications

without prior notice.

06/04/11

BRF 70/...-250 1

Summary of Contents

Page 1 - BRF 70/...-250

BRF 70/...-250Band-Reject Filters for the 450 MHz BandDESCRIPTIONHigh power base station band-reject filters for the 380 – 470 MHz range.The use of la

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