RF over Fiber


RF over Fiber (RFoF) solutions convert analog RF signals into optical signals which are then transmitted over optical fibers and converted back to RF signals at various bands. RFoF Solutions are designed to replace coax cables that degrade RF signals over long distances, typically longer than 150 ft.

RFOptic’s easy-to-use RFoF solutions are mainly used to connect remote antennas to central in-door locations over optical fiber in Communications, Satcom, Cellular, Defense, DAS, A/V and GPS applications. Since fiber is lighter than coax RFoF solutions are also used in weight sensitive application such as space, marine, airborne and balloon-based communication applications.

RFOptic’s Low Frequency solutions support up to 6 GHz while the High Frequency solutions support up to 40 GHz. See below for details:

 

RFOptic’s Supported Standard Radar Frequency Letter Band

BandFrequency RangeBandFrequency RangeBandFrequency Range
HF3 MHz to 30 MHzL band1 to 2 GHzX band8 to 12 GHz
VHF30 to 300 MHzS band2 to 4 GHzKu band12 to 18 GHz
UHF0.3 to 1 GHzC band4 to 8 GHzKa band26 to 40 GHz
 

High Frequency RF over Fiber (RFoF) modules

The RF parameters such as S21, NF, and P1dB that are detailed on the spec sheets can be customized to requirements.

 

High SFDR High Frequency RFoF Configuration Options

 No AmplificationPreAmpPreAmp & PostAmpPostAmp
18 GHzRFoF-18GHz- Q0-Mini
RFoF18TFR-N0-11
RFoF18RFR-N0-11
RFoF-18GHz-Q1-Mini
RFoF18TFR-A0-11
RFoF18RFR-N0-11
RFoF-18GHz-Q2-Mini
RFoF18TFR-A0-11
RFoF18RFR-A0-11
RFoF-18GHz-Q0-Mini-P
RFoF18TFR-N0-11
RFoF18RFR-A1-11
20 GHzRFoF-20GHz- Q0-Mini
RFoF20TFR-N0-11
RFoF20RFR-N0-11
RFoF-20GHz-Q1-Mini
RFoF20TFR-A0-11
RFoF20RFR-N0-11
RFoF-20GHz-Q2-Mini
RFoF20TFR-A0-11
RFoF20RFR-A0-11
RFoF-2-GHz-Q0-Mini-P
RFoF20TFR-N0-11
RFoF20RFR-A1-11
30 GHzRFoF-30GHz- Q0-Mini
RFoF30TFR-N0-11
RFoF30RFR-N0-11
RFoF-30GHz-Q1-Mini
RFoF30TFR-A0-11
RFoF30RFR-N0-11
RFoF-30GHz-Q2-Mini
RFoF30TFR-A0-11
RFoF30RFR-A0-11
RFoF-18GHz-Q0-Mini-P
RFoF30TFR-N0-11
RFoF30RFR-A1-11
40 GHzRFoF-40GHz- Q0-Mini
RFoF40TFR-N0-11
RFoF40RFR-N0-11
RFoF-40GHz-Q1-Mini
RFoF40TFR-A0-11
RFoF40RFR-N0-11
RFoF-40GHz-Q2-Mini
RFoF40TFR-A0-11
RFoF40RFR-A0-11
RFoF-18GHz-Q0-Mini-P
RFoF40TFR-N0-11
RFoF40RFR-A1-11
* Unity Gain or Higher, ** Low Noise Figure
 

Programmable Low Frequency RF over Fiber (RFoF) modules

Customization through programming

The embedded LNA and attenuators can be adjusted through the GUI to achieve the desired system link gain (S21), Noise Figure (NF), and P1dB (1 dB Compression point). The free RFoF link simulator tool can be used to determine how the embedded LNA and attenuator should be set up to meet the required link budget.

Furthermore, the solution has Optical and RF diagnostic capabilities for Tx, Rx modules and the RFoF link. These features save the cost of test equipment and provide the real-time diagnostic for any deployed link.


 

Programmable RFoF link Part Numbering

Unidirectional RFoF LinkDescriptionTx Module Part#Rx Module Part#
RFoF-2GHz-1310 Prog0.5 MHz - 2.5 GHz, 1310 nm *RFoF2T3FR-PA-11RFoF2R3FR-PA-11
RFoF-2GHz-1310 Prog GPSGPS Over Fiber with Bias-TRFoF2T3FT-PA-11RFoF2R3FR-PA-11
RFoF-3GHz-1310 Prog0.5 MHz - 3 GHz, 1310 nm*RFoF3T3FR-PA-11RFoF3R3FR-PA-11
RFoF-4GHz-1310 Prog0.5 MHz - 4 GHz, 1310 nm*RFoF4T3FR-PA-11RFoF4R3FR-PA-11
RFoF-6GHz-1310 Prog0.5 MHz - 6 GHz, 1310 nm*RFoF6T3FR-PA-11RFoF6R3FR-PA-11
RFoF-6GHz-1550 Prog0.5 MHz - 6 GHz, 1550 nm*RFoF6T5FR-PA-11RFoF6R5FR-PA-11
Bidirectional RFoF LinkDescriptionTransceiver 1Transceiver 2
RFoF-2G-5531S-B1​2.5 GHz Bidirectional, 1550 & 1310 nm RFoFB2T3R5SR-11RFoFB2T5R3SR-11
RFoF-3G-5531S-B13 GHz Bidirectional, 1550 & 1310 nmRFoFB3T3R5SR-11RFoFB3T5R3SR-11
RFoF-6G-5531S-B16 GHz Bidirectional, 1550 & 1310 nmRFoFB6T3R5SR-11RFoFB6T5R3SR-11
*Other wavelengths optional
 

Enclosure options for Multi Channel RFoF deployments


rfoptic-multi-channel-rfof-ind

1U Generic Chassis

  • Can house up to 8 RFoF Modules (Tx or Rx)
  • Splitter and WDM can be integrated for various multi link configurations

Multi Link RFoF Solutions

1U Removable Chassis

  • Can house up to 4 RFoF Modules (Tx or Rx)
  • Hot swappable architecture

Multi-Link-1U-or-2U

2U Removable Chassis

  • Can house up to 8 RFoF Modules (Tx or Rx)
  • Hot swappable architecture

rfoptic-multi-channel-rfof-out

IP-65 rated outdoor enclosure

  • Can house up to 8 RFoF modules Splitter and WDM can be integrated for various multi link configurations
  • ODVA MPO multi termini Optical connector
  • N-type RF connectors
*Ethernet based HTML/SNMP control available in all multi link chassis in enclosures

When is RFoF used?


An RF signal which is received through an antenna needs to be processed by a receiver. Typically, antennas are connected to nearby receivers using coax cables. Even though coax cables weaken the strength of the RF signal, RF power stays within the acceptable input power range of the receivers over short distances. However, in some applications using a coax cable becomes impractical or impossible due to the longer distance and RF over Fiber must be used.