67GHz RF over Fiber Mini-L Low Noise High SFDR
Table of Contents
Introduction
RFOptic’s analog RFoF compact modules enable long-distance transport of wideband RF signals. The Tx unit uses an optical transmitter, converts wideband RF signals to an Optical signal and the Rx unit converts the Optical signal back to the RF signal. The two units are connected by the customer’s fiber.
In general, a wide range of spurious-free dynamic range (SFDR) is desirable when multiple signals of very different power levels are expected. This Low Noise RFoF HSFDR link offers improved Noise Figure performance. High SFDR transmission RFoF simplifies signal conditioning requirements intended to avoid signal saturation and subsequent consequences such as power level adjustment. During e.g., antenna testing, radar, or communications system testing, high SFDR is essential due to the typical large amplitude ratios between main and side lobes or close and distant targets. The same applies to DF/ELINT systems that have to handle strong jammers concurrent with weak signals of interest.
RFOptic’s 12, 18, 20, 30, 40, and 67GHz RFoF solutions provide high SFDR of minimum 114 dB/Hz. Due to their improved NF, an additional pre-amplifier may not be needed. These high-performance products are used in applications such as civil communication, antenna remoting, telemetry, defense systems, satellite communications, and more.
Key Features
- Frequency Range: 1 – 67GHz
- Low Noise RFoF HSFDR version
- Low spurious level
- High SFDR 114 dB/Hz
- Excellent phase linearity
- Excellent Phase Noise
Configurations
- Standard (stand-alone)
- 1U Generic enclosure (4 units)
- 1U Removable panel enclosure (4 units)
- Outdoor (4 units)
Applications
- Distributed Antenna
- Satcom
- Radio telescopes
- Telecommunication:
- Antenna Remoting
- Long RF links via fiber
- EW
Options
- Customized RF Gain, P1dB, Noise Figure by adding internal Pre & Post amplifier(s)
- Extended low-frequency bandwidth
RFoF 67GHz L0 Mini Low Noise High SFDR Specifications
| RF Parameter Tx-Rx Link | Unit | Specification (typical) |
|---|---|---|
| Frequency Range | GHz | 1 – 67 |
| RF Gain at 40GHz [1,2] | dB | -27 |
| Gain Flatness for every 5GHz bandwidth | dB | ±1.5 |
| 1dB Input gain compression point at 40GHz [2] | dBm | 17 |
| Noise Figure at 40GHz [2] | dB | 29 |
| SFDR (calculated) [2,3] | dB/Hz2/3 | 114 |
| Maximum RF input level (No damage) | dBm | 20 |
| VSWR Input | - | 2:1 |
| VSWR Output | - | 2:1 |
| Spurious [4] | dBc | <-90 |
| Phase Noise at 40GHz at 10KHz Offset | dBc/Hz | -130 |
| Input / Output impedance | Ohm | 50 |
| Optical and Electrical and Environmental (Tx, Rx) | ||
| Laser diode optical wavelength | µm | 1.55 |
| Receiver photodiode optical wavelength | µm | 1.5-1.58 |
| Operating temperature range | °C | 0 to +70 |
| Storage temperature | °C | -40 to +85 |
| LED status indicators (Tx/Rx) | - | Blue/Green/Red |
| Input voltage [5] | VDC | 5 |
| Power consumption Tx module | Watt | 2 |
| Power consumption Rx module | Watt | 0.25 |
| Mechanical (Tx/Rx) | ||
| Dimensions Tx/Rx unit | mm | 75*154*33 |
| Weight Tx/Rx unit | grams | 450 |
| RF Input / Output connectors | - | 1.85 |
| Optical Connector | - | FC/APC |
| Power connector and Data/monitor connector [6] | - | DB15 |
- Excluding customer fiber loss.
- Measured at 40GHz.
- SFDR (calculated) ≈ 2/3x[(IP1dB+10)+174-NF] dB/Hz2/3; Excluding in-band harmonics.
- Measured with input signal at Ip1dBc – 3dB at 1GHz.
- Recommended Power Supplies: Meanwell P/N GSM25U05-P1J (USA); GSM25E05-P1J (Europe); GE40I05-P1J (all purpose).
- For USB monitor, download the software here: https://rfoptic.com/software-download-rfof/
RFoF 67GHz – Simplified Block Diagram
RFoF Low NF 40GHz: Typical Test Results
RFoF Enclosure Options
| Parameter | 19" 1U Enclosure for RFoF | Outdoor Enclosure for RFoF |
|---|---|---|
| Dimensions (mm) | 19" 1U Generic: 445(W)* 476(L)*44(H) 19" 1U Removable: 442(W)* 402(L)*44(H) | Small Outdoor: 270(W)*230(L)*85(H) Large Outdoor: 330(W)*350(L)*85(H) |
| RF Input / Output Connector | 1.85mm female | 1.85mm female |
| Optical Connector | FC/APC or SC/APC | MPO/APC 4/8 male [1] |
| Data Connector | USB2/RJ-45 | RJ45 female [2] |
| Power Connector | HP Socket | DC female/ AC male [2,3] |
| Power | 110/220 VAC | 9-36DC / 110/220VAC [2,3] |
- MPO (F) 4/8 optical cable should be ordered according to the required length and conditions.
- IP-54 Data, AC and DC opposite connectors are provided as accessories with the module (cables are not included).
- DC and AC versions of the outdoor enclosure are available.
Mechanical Outline Drawing: 40GHz RFoF Tx and Rx modules
Rx module
Tx module
Ordering Information
| P/N | Description | Tx | Rx |
|---|---|---|---|
| RFoF-67G-L0-Mini | Transceiver 67GHz, HSFDR | RFoF67TFL-N0-11 | RFoF67RFL-N0-11 |
| HSFDR-Cable-Data-DC [1] | 2 X D15 to USB 150cm & D15 to DC 25cm special cable | For stand-alone HSFDR link | |
| Outdoor Data & AC set [2] | Data and 110/220 AC opposite connectors – accessories | For outdoor enclosure with AC supply | |
| Outdoor Data & DC set [2] | Data and 5VDC opposite connectors – accessories | For outdoor enclosure with DC supply | |
- Cable supplied with the RFoF-67G-L0-Mini link.
- Connectors supplied with the RFoF-67G-L0-Mini link/s in Outdoor enclosure.
Contact information: Tel. Int.: +972-76-540 0180, Tel. USA: +1 708 RFOPTIC, To contact us directly, click here