DRAFT Salient Characteristics.pdf
PDF 159 KB Posted
- Attached to
- UHF/VHF Antennas Federal contract opportunity
- Solicitation number
- 6973GH-24-MS-00006
About this file
This document contains a draft statement of work and salient characteristics for the acquisition of UHF and VHF antennas by the Federal Aviation Administration (FAA). Key details include:
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The FAA requires UHF and VHF antennas in accordance with the draft statement of work and salient characteristics for eight National Stock Numbers. The antennas are used in various FAA communications facility types including backup emergency communications, emergency communications systems, radio center air/ground communication facilities, remote communications outlets, and remote transmitter/receivers.
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The anticipated contract type is an indefinite-delivery/indefinite-quantity contract with fixed unit prices and a two-year base period plus four two-year option periods. The North American Industry Classification System code is 334290 for other communications equipment manufacturing and the small business size standard is 800 employees.
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Interested vendors must submit capability statements and past performance information by February 22, 2024 to a point of contact at the FAA in response to solicitation number 6973GH-24-MS-00006. Capability statements must demonstrate experience manufacturing similar VHF/UHF antennas and meeting the requirements in the draft statement of work and salient characteristics.
View the file
Other files for this federal contract opportunity
| File | Type | Posted |
|---|---|---|
| Design of VHF and UHF Comm Antennas.pdf | ||
| DRAFT Air to Ground Antenna Contract SOW.pdf | ||
| ANSI_ASQCZ1-4-1993.pdf | ||
| FAA-NA-77-39 Test and Evaluation of Air Ground Comm Antennas.pdf | ||
| MILSTD810F.pdf | ||
| ASTM D 3951-98.pdf |
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Text version
AIR TO GROUND COMMUNICATION ANTENNA SALIENT CHARACTERISTICS
Salient Characteristics, Mechanical:
The antenna shall be omni-directional, vertically polarized, radome supported and enclosed, di-pole antenna and designed for mounting on a common, in-line support pipe.
The support pipe size shall be 2 ½ inch I.P.S for dual range, arctic and high-gain antennas and 2 ½ to 1 ¼ inch I.P.S. for single range antennas. An adapter kit shall be provided with each antenna for adapting the 2 ½ inch mounting to a 1 ¼ inch mast. All hardware required for mounting and securing the antenna assembly to either the 2 ½ inch support pipe or adapting the 2 ½ inch mounting to a 1 ¼ inch mast shall be provided. The assembly mounting-to-support-pipe shall be coaxial or in-line. The assembly shall be provided with seals to prevent any moisture from entering either the antenna or support pipe.
The antennas shall have a drain hole that will allow any condensate water to drain from the inside of the radome. The fiberglass radomes’ outer surface shall have a finish suitable for long term (approximately 10 years) outdoor operation. The antennas shall be constructed of corrosion-resistant materials and contain no exposed dissimilar metal joints.
All parts required for mounting the antennas to 1 ¼ I.P.S. and 2 ½ I.P.S. support pipes shall be captive to the antennas with the exception of the mounting bolts.
An assembly shall include all components of the antenna array, assembly mount, connector(s), radome and support mast where applicable. Components of the antenna array that are enclosed within the radome assembly shall be securely held in place.
Each antenna shall be terminated at the lower exterior base of the antenna radome with a Type N female coaxial connector.
The antenna mounting method shall be such that the antennas can be securely rested on the support pipes and be self-supporting during the mounting process. The antennas must be installable by only one technician.
The antenna assembly shall meet or exceed the required characteristics over the range of operating service conditions specified below:
Temperature -40 degrees C to 60 degree C
Relative Humidity 0% to 100%, including seacoast salt-spray environment.
Wind and ice loading Shall be able to withstand winds up to 85 knots; with up to ½ inch of radial ice coating.
Precipitation
Shall be able to operate with 7 inches of rainfall per hour.
Vibration
Highway Transportation
Fungus
Inert to fungus growth
The antenna shall be sufficiently rugged and weather-proof to operate unattended and continuously for 10 years in adverse environments, i.e., fog, rain, snow, hail, salt-spray, high winds, etc.
All metal parts of the antennas, including the center pin of the input connector, shall have a low (less than an ohm) DC resistance to ground.
Grounding shall be accomplished after securing the antenna to the mast. A means shall be provided to attach a customer supplied AWG #6 ground wire to the external antenna ground. Any terminals required to ground the antenna shall be provided.
Salient Characteristics, Electrical:
VSWR Shall be less than or equal to 2:1
Terminal impedance 50 ohms plus/minus 5%
RF power rating Shall be able to radiate 100W carrier continuously without visible damage or deformation of the antenna; the change in Voltage Standing Wave Ratio (VSWR) shall be less than 10% over the frequency range.
Radiation, Omni-directional Plus/minus 1.0 dB for 360 degrees of rotation at 0 degrees elevation.
Radiation, vertical peak or deviation 0 degrees, plus/minus 10 degrees.
Elevation Beamwidth
RF Power Gain
65o minimum beamwidth at -3 dB half-power point.
0 dBi minimum
Testing Requirements
Design Qualification Testing
Antennas that have never been supplied to the FAA will be subjected to the following Design Qualification tests to verify compliance with the mechanical and electrical characteristics.
Attachment B RCAG Antenna Specification
2/8/2024
1. Performance of tests to verify compliance with VSWR, radiation patterns isolation and gain requirements.
a. Radiation patterns shall be substantially similar to those presented and measured in FAA-NA-77-39 Test and Evaluation of Air/Ground Communications Antennas for di-pole antennas.
2. Environmental testing to the following specifications
a. Low Temperature per MIL-STD-810F, Method 502.4, Procedure III.
Low temperature of -40oC, 24 hours dwell time after low temperature is reached.
b. High Temperature per MIL-STD-810F, Method 501.4, Procedure II.
High temperature of +60oC, 24 hours dwell time after High temperature is reached.
c. Relative Humidity per MIL-STD-810F, Method 507.4, Procedure II, Aggravated Temp-RH Test. Test duration of 10 each 24 hour cycles.
d. Fungus per MIL-STD-810F, Method 508.4.
e. Vibration per MIL-STD-810F, Method 514.5, Figure 514.5c-1, Highway Truck Vibration. Test time of 3 hours per axis.
f. Salt Fog per MIL-STD-810F, Method 509.4.
g. Simulated wind and ice load test. With the antenna mounted horizontally, place at least five equally distributed weights that equal the total wind and ice loading, along the length of the radome. Leave the weights in place for 10 minutes.
Production Testing
Each antenna will be tested by the manufacturer for acceptable VSWR using sweep frequency testing over the full frequency band prior to delivery.
NSN 5985-01-050-7521: This Type 1 antenna assembly shall be a low-profile UHF antenna (single element).
Antenna weight shall not exceed 4.5 pounds. Length of antenna shall not exceed 41 inches.
The antenna shall meet or exceed the Electrical Salient Characteristics over the frequency range 225 MHz to 339.5 MHz.
NSN 5985-01-050-7522: This Type 1 antenna assembly shall be a low profile VHF antenna (single element).
Antenna weight shall not exceed 5.5 pounds. Length of antenna shall not exceed 56 inches.
2/8/2024
The antenna shall meet or exceed the Electrical Salient Characteristics over the frequency range 118 MHz to 137 MHz.
NSN 5985-01-050-7523: This Type 1 antenna assembly shall be a low-profile UHF/UHF antenna (two single elements).
Antenna weight shall not exceed 9.5 pounds. Length of antenna shall not exceed 92 inches.
The antenna shall meet or exceed the Electrical Salient Characteristics over the frequency range 225 MHz to 399.5 MHz.
Channel isolation shall be at least 30 dB.
NSN 5985-01-050-7524: This Type 1 antenna assembly shall be a low-profile VHF / UHF antenna (two single elements).
Antenna weight shall not exceed 9.5 pounds. Length of antenna shall not exceed 94 inches.
The antenna shall meet or exceed the Electrical Salient Characteristics over the frequency range 118 MHz to 137 MHz and 225 MHz to 399.5 MHz.
Channel isolation shall be at least 30 dB.
NSN 5985-01-050-7525: This Type 1 antenna assembly shall be a low-profile High Gain VHF antenna (single element).
Antenna weight shall not exceed 16 pounds. Length of antenna shall not exceed 138 inches.
The antenna shall meet or exceed the Electrical Salient Characteristics over the frequency range 118 MHz to 137 MHz.
NSN 5985-01-053-5108: This Type 1 antenna assembly shall be a low-profile VHF/VHF antenna (two single elements).
Antenna weight shall not exceed 19 pounds. Length of antenna shall not exceed 154 inches.
The antenna shall meet or exceed the Electrical Salient Characteristics over the frequency range 118 MHz to 137 MHz.
Channel isolation shall be at least 30 dB.
NSN 5985-01-296-1904: This Type 1 antenna assembly shall be a low-profile High Gain UHF antenna (single element).
2/8/2024
Antenna weight shall not exceed 11 pounds. Length of antenna shall not exceed 78 inches.
The antenna shall meet or exceed the Electrical Salient Characteristics over the frequency range 225 MHz to 399.5 MHz.
NSN 5985-01-668-0620: This Type 1 antenna assembly shall be an arctic grade, low-profile VHF antenna (single element). It shall be painted black (or dark grey) and have a coating that will inhibit ice from collecting on the antenna.
Antenna weight shall not exceed 9 pounds. Length of antenna shall not exceed 65 inches.
The antenna shall meet or exceed the Electrical Salient Characteristics over the frequency range 118 MHz to 137 MHz
Attachments:
FAA-NA-77-39 Test and Evaluation of Air/Ground Communications Antennas
MIL-STD-810F Department of Defense Test Method Standard for Environmental Engineering Considerations and Laboratory Tests
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