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DPF 4/6 S

Duplex FiltersDPF 4/6 S

6-Resonator Duplexer for the 80 MHz Band

Description

  • The DPF 4/6 S-... is a 6-resonator duplex filter for duplex radiotelephones.
  • This filter is primarily intended for equipment, where the Tx and the Rx operate on single frequencies, but it can also, however with slightly reduced data, be used 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 can be tuned within the complete 66 - 88 MHz range with a duplex separation between 4 and 13 MHz.
  • The filter has very small dimensions owing to the use of high-Q, temperature compensated helical resonators with discrete-component interconnections.
  • The housing is made of extruded aluminium, the chassis of passivated steel, and the connectors are provided with teflon insulation.
  • The filter is coated with black vinyl to prevent corrosion.

Specifications

Electrical
Model DPF 4/6 S-...
Frequency 66 - 88 MHz
Max. Input Power 50 W
Special spec. info Single-channel tuned : Multi-channel tuned,
BW = 2 MHz :
Insertion Loss Tx-Ant and Ant-Rx < 1.2 dB < 1.3 dB
Spacing 3 - 16 MHz (see table)
Tx Noise Suppression on Rx Frequency > 80 dB > 40 dB
Isolation Rx on Frequency Tx > 80 dB > 40 dB
Impedance 50 Ω
VSWR < 1.4:1
Mechanical
Connection(s) N(f) (Others on request)
Dimensions 170 x 154 x 33 mm /
6.69 x 6.06 x 1.30 in.
Weight Approx. 1.05 kg / 2.31 lb.
Environmental
Operating temperature range -30 °C to +60 °C
Frequency Stability Approx. 9 ppm / °C

Diagram and Mounting

TYPICAL RESPONSE CURVES

Ordering Designations

Model Product No. Frequency
DPF 4/6 S-3/4 N(f) 200000282 3 - 4 MHz
DPF 4/6 S-4/13 N(f) 200000263 4 - 13 MHz

Please Note

This filter type can also be delivered with the resonators stacked 3 over 3, thereby accomodating special space restrictions. In this case please order DPF 4/33 S.

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