Attachment 1 -Salient Characteristics.pdf
PDF 102 KB Posted
- Attached to
- USAFA Anechoic Chamber Modernization Federal contract opportunity
- Solicitation number
- FA700025Q0024
About this file
This document is a detailed Technical Specification for an anechoic electromagnetic testing chamber and its associated equipment, specifically for the United States Air Force Academy (USAFA) located in Fairchild Hall. The chamber specifications require foam absorbers fabricated from closed-cell materials with a 25-year service life, capable of electromagnetic wave absorption across 10 MHz to 40 GHz, and installed comprehensively in a chamber measuring approximately 34 ft. x 14 ft. x 14 ft. with an additional perpendicular section. The document also details two critical pieces of equipment: an electric antenna stand with a 1.5-meter fixed height supporting up to 6 kg, controlled via LAN with DC stepper motor polarization, and a 2-meter diameter turntable capable of supporting 500 kg point loads and 100 kg distributed loads, with precise rotational capabilities. Both the antenna stand and turntable are designed to operate within 10°C to 35°C, use 110-230 VAC power, provide 20 dB interference suppression, and integrate with FCU3.0 or NCD Controllers for remote operation.
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Other files for this federal contract opportunity
| File | Type | Posted |
|---|---|---|
| Combined Synopsis Solicitation_Anechoic Chamber_FA700025Q0024_Amendment 3.pdf | ||
| Attachment 4 - FAR 52.212-3(b).pdf | ||
| Combined Synopsis Solicitation_Anechoic Chamber_FA700025Q0024_Amendment 2.pdf | ||
| Combined Synopsis Solicitation_Anechoic Chamber_FA700025Q0024_Amendment 1.pdf | ||
| Attachment 3 -Trade Agreement Certificate.pdf | ||
| Combined Synopsis Solicitation_Anechoic Chamber_FA700025Q0024.pdf | ||
| Attachment 2 - Provisions and Clauses_FA700025Q0024.pdf |
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Text version
Salient Characteristics:
Chamber Technical Specifications:
1.The foam absorbers shall be fabricated from closed-cell materials (e.g., polyethylene, polystyrene, or other proprietary formulations) that prevent particle shedding.
2.The material shall resist environmental degradation caused by moisture, humidity, and temperature fluctuations, ensuring consistent performance throughout its service life.
3.The absorbers shall feature a modular design, enabling individual unit replacements without the need to replace entire panels or sections.
4.The foam absorbers shall be designed for a minimum service life of 25 years, maintaining their electromagnetic absorption properties and structural integrity under continuous operational use.
5.The absorbers shall demonstrate resistance to physical damage and impacts typical of high-use environments, ensuring reliability throughout their lifespan.
6.The absorbers shall be installed to comprehensively cover all surfaces of the chamber, including the floor, walls, and ceiling, to ensure optimal electromagnetic wave absorption and minimize reflectivity. Absorbers of varying dimensions shall be deployed based on the chamber's design, such as 12-inch absorbers for specific areas and 26-inch absorbers for broader surface coverage. The absorbers shall be installed in the anechoic chamber located on the 2nd floor of Fairchild Hall, USAFA, with chamber dimensions of approximately 34 ft. x 14 ft. x 14 ft., plus an additional perpendicular section measuring 13 ft. x 14 ft. x 14ft.
7.The installation of walkway absorbers shall be integrated into the chamber to allow for personnel access without disrupting the electromagnetic properties or testing environment. These walkway absorbers shall bedurable enough to withstand frequent use while maintaining the chamber's performance standards. 8.The new absorbers shall demonstrate high electromagnetic performance across a frequency range from approximately 10 MHz to 40 GHz, with a minimum of a 3ft quiet zone in the middle of the primary chamber, ensuring low reflectivity and effective absorption across this spectrum. The reflectivity performance of the absorbers shall be tested post-installation to verify that they meet or exceed the operational requirements of USAFA’s anechoic chamber.
9.The absorbers shall comply with recognized quality standards, including ISO 9001 for quality management and ISO 14001 for environmental management. Certification documentation shall be provided to confirm compliance with these standards, ensuring that the absorbers meet rigorous quality control and environmental responsibility measures during manufacturing and installation.
Electric Antenna Stand Technical Specification:
1.The antenna stand shall have a fixed height of 1.5 meters with a total mast height of 1.6 meters.
2.The stand shall support a maximum load of 6 kg, provided that the load is balanced. A counterweight solution shall be available for heavy antennas to maintain balance.
3.Polarization shall be controlled by a DC stepper motor, with a polarization time of approximately 3 seconds. The system shall rotate antennas around their axis to minimize elevation errors during measurements.
4.The stand shall be controlled remotely via LAN (TCP/IP), with additional control options available when connected to the FCU3.0 or NCD Controller.
5.The antenna stand shall provide interference suppression of 20 dB below limits, as per DIN EN55011:2022-05 class B standards.
6.The system shall operate on a voltage range of 110-230 VAC, with a maximum current consumption of 16Aand operating on a 50/60 Hz single phase power supply.
7.The operational temperature range for the system shall be between 10°C and 35°C.
8.The stand shall be equipped with four wheels to ensure easy mobility within the chamber
Turntable Technical Specification:
1.The turntable shall have a diameter of 2.0 meters and a height of 140 mm, designed for freestanding installation on the surface of the floor in electromagnetic absorption chambers.
2.The turntable shall support a point load of 500 kg and a distributed load of 100 kg over an area of 10 cm x10 cm.
3.The turntable shall use a synchronous servo motor with adjustable rotating speeds ranging from
0.1 rpm to2.5 rpm, with a positioning accuracy of ± 0.5°.
4.The turntable shall provide a rotational angle range of -200° to 400°.
5.The turntable’s elevation tolerance shall be less than 3 mm, ensuring minimal vertical deviation during rotation.
6.The turntable shall be remotely controlled via LAN (TCP/IP) and shall be integrated with the FCU3.0 or NCD Controller for full functionality.
7.The turntable control system shall be fiber-optic based, to allow for remote control outside of the chamber.
8.The turntable shall provide interference suppression of 20 dB under limits, as per DIN EN 55011:2022-05class B standards.
9.The turntable shall operate on a 110-230 VAC, 50/60 Hz single-phase power supply, with a maximum current consumption of 16A.
10.The turntable shall be operational within a temperature range of 10°C to 35°C.
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