Typical response curve
DPF 70/4
4-Cavity Duplexer for the 450 MHz Band
Description
- The DPF 70/4… is a 4-cavity duplex filter for duplex radiotelephones.
- The DPF 70/4… can be adjusted within the complete
406 – 470 MHz band. The duplexer can be delivered in four different versions according to required duplex spacing. See also “Ordering information” below. - The DPF 70/4… is primarily intended for equipment, where the Tx and 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 uses full-length ¼ cavities in a compact, extruded aluminium housing. The chassis is made of passivated steel, and teflon insulation has been applied in the coaxial cables and in the connectors.
- The filter is black vinyl coated to prevent corrosion.
Specification
| Electrical | |
| Model | DPF 70/4… |
|---|---|
| Frequency | 406 – 470 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 |
< 1.0 dB (typ. 0.8 dB)< 1.2 dB (typ. 1.0 dB)
|
| Tx Noise Suppression on Rx Frequency |
> 60 dB> 45 dB
|
| Isolation Rx on Frequency Tx |
> 60 dB> 45 dB
|
| Impedance | 50 Ω |
| VSWR | < 1.5:1 |
| Environmental | |
| Frequency Stability | Approx. 4.5 ppm / °C |
|---|---|
| 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 | 226 x 104 x 33 mm / 8.9 x 4.1 x 1.3 in. |
| Weight | Approx. 0.69 kg / 1.52 lb. |
Ordering Codes
| Model | Product No. | Frequency |
|---|---|---|
|
DPF 70/4-5/7 N(f) |
200000301 | 5 – 7 MHz |
|
DPF 70/4-7/9 N(f) |
200000304 | 7 – 9 MHz |
|
DPF 70/4-9/13 N(f) |
200000310 | 9 – 13 MHz |
|
DPF 70/4-13/16 N(f) |
200000294 | 13 – 16 MHz |
Additional Information
PLEASE NOTE
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.
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.
Diagrams
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 : 2026-06-26
Version 1