Questions and Answers Yokota Air Base.pdf
PDF 142 KB Posted
- Attached to
- Yokota Air Base - Radio Frequency over Fiber
- Solicitation number
- FA520925Q014A
About this file
This document is a Questions and Answers (Q&A) file for a Radio Frequency over Fiber (RFoF) project at Yokota Air Base in Japan. The Q&A provides technical details about the planned radio communication system, including specific radio equipment (AN/PRC-117G multiband, AN/PRC-160, KOR-24A radios), with plans to upgrade to AN/PRC-167 multiband radios in the future. The fiber infrastructure will use optical aggregation with CWDM or WDM technologies, spanning approximately 5 kilometers with three patch panels, and utilizing a single-mode fiber core between the antenna station and radio room.
The document addresses technical specifications for radio frequency transmission, including power considerations and interference mitigation strategies. The system anticipates a maximum RF output of 20W, with RFoF transmitters operating at +10 to +13 dBm input levels. Co-site interference will be managed through proper antenna separation and careful system gain and isolation design. The project supports various radio operations including VHF/UHF line-of-sight, HF, and L-Band (Link 16) communications, with flexibility for redundancy and directional separation built into the fiber infrastructure.
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Other files
| File | Type | Posted |
|---|---|---|
| RFoF Solicitation.pdf | ||
| Statement of Work - RF Over Fiber.pdf | ||
| Provisions and Clauses.pdf |
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Questions and Answers Yokota Air Base – Radio Frequency over Fiber
1. Radios:
i. What radios do you plan to use?
We are using the AN/PRC-117G multiband, AN/PRC-160, KOR-24A radios, supporting VHF/UHF LOS, HF and L-Band (Link 16) operations respectively.
Additionally, we anticipate upgrading the AN/PRC-117G to the AN/PRC-167 multiband in the near future.
ii. How will you handle co-site interferers?
Co-site interference will be mitigated using proper antenna separation.
Additionally, system gain and isolation will be carefully managed through the RF over Fiber (RFoF) design and rack layout.
2. Fiber
i. Does the “Optical Aggregation” mean that each link needs to operate on a different wavelength so that all 4 channels go over one fiber?
Yes, "Optical Aggregation" refers to using CWDM or WDM, where each channel operates on a different wavelength to allow all channels to be multiplexed over a single fiber core (or pair if required).
ii. Is one fiber link between radio station and antenna station, or can there be multiple fiber?
The design intends to use one single-mode fiber core between the antenna station (rooftop) and the radio room. However, we have access to two fiber pairs, offering flexibility for redundancy or directional separation if needed.
iii. How long is the link?
The total fiber link length is approximately 5 kilometers, with three patch panels along the path.
3. Power
i. No mention of RF output power, should 20W be assumed?
Yes, 20W RF output should be considered as the maximum potential, particularly during high-power LOS transmission.
ii. How much output power do you need?
After attenuation, we anticipate driving the RFoF transmitters at approximately +10 to +13 dBm input levels. The RFoF system must accommodate this range or include attenuation at the module input to manage higher radio power levels.
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