RF Networks
RF (Radio Frequency) networks are telecommunications networks that use radio waves to transmit and receive data over the air. They are essential for mobile phone systems, broadcast television, satellite communication, and various forms of wireless networking. RF networks enable connectivity and communication over vast distances, supporting a wide range of applications from personal communication to global broadcasting.
Custom RF Feed Networks for Multi-Band Antenna Systems
Dolph Microwave designs and manufactures RF feed network assemblies that combine the required microwave components into one matched signal path. Published configurations include multi-port and multi-band designs with single or dual polarization.
Standard and customized builds are available. Send your Rx/Tx frequency ranges, polarization, power level, interfaces and mechanical limits for engineering review.
One Feed Network, Matched to Your RF Chain
We can build the feed network around the functions your antenna system needs, using Dolph microwave components such as a microwave feedhorn, OMT, waveguide filter, diplexer and other waveguide sections.
Send the Inputs That Define the Build
Published RF Network Configuration Data
The following values reproduce the model data shown in Dolph Microwave’s RF Networks catalog. Blank fields indicate values not stated in the published table. Final performance and interfaces should be confirmed for the selected configuration.
| Model | Rx Freq. (GHz) | Tx Freq. (GHz) | VSWR | Pol. Type |
|---|---|---|---|---|
| DH-Feed-S-RO… | 2.1-2.5 | 1.25 | RHCP/LHCP | |
| DH-Feed-X-4-RT… | 7.25-7.75 | 7.9-8.4 | 1.4 | RHCP/LHCP |
| DH-Feed-X-4-RT… | 7.25-7.75 | 7.9-8.4 | 1.4 | HLP/VLP |
| DH-Feed-SX-4-RT… | 7.8-8.4 2.2-2.3 | 2.025-2.11 | 1.25 | RHCP/LHCP |
| DH-Feed-C-4-RT… | 3.4-4.2 | 5.85-6.725 | 1.25 | HLP/VLP |
| DH-Feed-C-4-RT… | 3.4-4.2 | 5.85-6.725 | 1.25 | RHCP/LHCP |
| DH-Feed-CKu-4-RO… | 3.4-4.2 10.7-12.75 | 1.35 | RHCP/LHCP HLP/VLP | |
| DH-Feed-CKu-4-RO… | 3.4-4.2 10.7-12.75 | 1.35 | HLP/VLP | |
| DH-Feed-DBS-4-RT… | 10.7-12.75 | 17.3-18.4 | 1.3 | RHCP/LHCP |
| DH-Feed-Kuka-4-RT… | 12.25-12.75 19.60-21.20 | 14.0-14.5 29.4-31.0 | 1.35 | HLP/VLP |
| DH-Feed-Ka-4-RT… | 17.7-21.2 | 27.5-31.0 | 1.25 | HLP/VLP |
| DH-Feed-Ka-4-RT… | 17.7-21.2 | 27.5-31.0 | 1.25 | RHCP/LHCP |
| DH-Feed-Ka-4-RTTrk… | 17.7-21.2 | 27.5-31.0 Trk18.3-20.2 | 1.35 | RHCP/LHCP |
| IL (dB) | Axial Ratio (dB) | Cross-pol (dB) | Isolation Tx/Rx | Freq. Isolation | Handling Power(W) | Interface Tx/Rx | Com.Port | Material |
|---|---|---|---|---|---|---|---|---|
| 1.5 | 20 | 100 | N-K | Al | ||||
| 0.75 | 25 | 85 | 1000 | WR112 | Φ54 | Al | ||
| 35 | 85 | 1000 | WR112 | Φ54 | Al | |||
| 0.8 | 20 | 15 | 20 | 100 | WR112/N-K | Al | ||
| 0.3 | 30 | 85 | 1000 | WR229/137 | Φ57.8 | Al | ||
| 0.4 | 0.5 | 30 | 85 | 1000 | WR229/137 | Φ57.8 | Al | |
| 0.35/0.55 | 0.5 | 30 | 30 | 500 | WR229/75 | Φ62 | Al | |
| 0.25 | 35 | 30 | 30 | 500 | WR229/75 | Φ62 | Al | |
| 0.3 | 0.5 | 30 | 85 | 500 | WR75/62 | Φ18.18 | Al | |
| 0.5 | 1.5 | 30 | 85 | 30 | 500 | WR75/42/28 | Al | |
| 0.7 | 35 | 85 | 500 | WR42/28 | Φ11.5 | Al | ||
| 0.7 | 0.5 | 30 | 85 | 500 | WR42/28 | Φ11.5 | Al | |
| 1.2 | 0.5 | 30 | 85 | 500 | WR42/28/42 | Φ11.5 | Al |
Published Ordering Code
The catalog gives the following ordering example for a Ku-band transceiver feed assembly.
Build the Feed Chain Around the Required Function
Polarization Split or Combination
When your network requires separate polarization paths, integrate an OMT. For circular polarization or phase-control requirements, review Dolph’s phase shifter and septum polarizer options.
Discuss the Polarization Layout
Band Selection and Tx/Rx Separation
Use a waveguide filter when the feed chain needs band selection. Use a waveguide diplexer when transmit and receive paths must be separated or combined in the network.
Read the Multi-Band Feed Network Article
Complete Feed Systems for More Complex Builds
If you need the horn, OMT, filters, diplexers, polarizers and other waveguide parts supplied as a complete feed system, see Dolph’s Antenna Feeder Networks or the Custom Antenna Feed Systems capability page.
See C-Band Feed and RF Network ExamplesNeed a Configuration Outside the Published Examples?
Send the frequency plan, polarization, power, interface, dish data, mechanical envelope, quantity and timing. Dolph can review a standard or customized RF network configuration.
Manufacturing and Test Support in Xi’an
Dolph was founded in 2001 and manufactures microwave components and feed systems in China. Manufacturing capabilities listed by Dolph include CNC machining, turning, waveguide forming and bending, soldering and brazing of copper, copper alloys and aluminium, plating and electroforming.
Dolph’s manufacturing information also lists a testing laboratory, microwave chamber and coordinate measuring equipment. Its Quality Manual and Quality Procedure use ISO 9001:2015, and manufacturing capabilities include anodising and passivation to RoHS requirements.
Dolph states a one-year warranty for defects in material and workmanship under the published warranty terms.
Technical Documents
Use the flange reference for interface designations and the RF Networks catalog for the published model table and ordering information.
