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DPF 2/55

Duplex FiltersDPF 2/55

10-Cavity Duplexer for the 160 MHz Band

Description

  • The DPF 2/55… is a 10-cavity duplex filter for duplex radio transcivers.
  • This duplexer is delivered in a low band version type DPF 2/55 L, tunable within 138 - 156 MHz and a high band version type DPF 2/55 H, tunable within 152 - 175 MHz. These models are again delivered in submodels, each dedicated to work with a certain Tx-Rx spacing. See “Ordering information” below.
  • The DPF 2/55… models are primarily intended for equipment, where the Tx and Rx operate on several channels, i.e. within a certain port bandwidth. In the last case, factory-tuning is recommended.
  • 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.

Specifications

Electrical
Model DPF 2/55...
Frequency DPF 2/55 L : 138 - 156 MHz
DPF 2/55 H : 152 - 175 MHz
Max. Input Power 50 W
Special spec. info Multi-channel tuned, BW = 3 MHz : Multi-channel tuned, BW = 8 MHz :
Insertion Loss Tx-Ant and Ant-Rx < 1.6 dB < 1.6 dB
Spacing Tx-Rx 4 - 10 MHz (adjustable)
Tx Noise Suppression on Rx Frequency > 85 dB > 70 dB
Isolation Rx on Frequency Tx > 85 dB > 70 dB
Impedance 50 Ω
VSWR < 1.5:1
Mechanical
Connection(s) N(f)
(BNC(f), TNC(f), UHF(f), SMA(f) on request)
Dimensions 232 x 130 x 58 mm / 9.13 x 5.12 x 2.28 in.
Weight Approx1.325 kg / 2.92 lb.
Environmental
Operating temperature range -30 °C to +60 °C
Frequency Stability Approx. 5 ppm / °C

Ordering Designations

Model Product No. Description Frequency
DPF 2/55 L-4/6-N(f) 200002385 SPACING: 4 - 6 MHz 138 - 156 MHz
DPF 2/55 L-6/8-N(f) 200002386 SPACING: 6 - 8 MHz 138 - 156 MHz
DPF 2/55 L-8/10-N(f) 200002387 SPACING: 8 - 10 MHz 138 - 156 MHz
DPF 2/55 H-4/6-N(f) 200002388 SPACING: 4 - 6 MHz 152 - 175 MHz
DPF 2/55 H-6/8-N(f) 200002389 SPACING: 6 - 8 MHz 152 - 175 MHz
DPF 2/55 H-8/10-N(f) 200002390 SPACING: 8 - 10 MHz 152 - 175 MHz

Ordering information

When ordering, please use the table above to select the appropriate ordering designation for the desired filter type. If duplex TX and RX frequencies are stated when ordering, the duplexers are delivered factory adjusted. If TX and RX frequencies are not stated, the filters are delivered non-adjusted.

Special configurations of this filter type may be quoted on request. For instance, the filter can be delivered with other connector types or with flying leads (RG 316 coaxial cable) terminated with connectors or for soldering-connection.

Typical Response curves @ 4 MHz Tx-Rx Spacing & 3 MHz BW

DPF 2!55 Curve

Mounting Details

Mounting holes:

A: ø3.0 mm (2 pcs)
B: ø3.2 mm (2 pcs)
C: ø5.0 mm (6 pcs)

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