Attch 1_Chamber Specifications_23r12 _R2.docx

AFRL/RI

Anechoic Chamber 10 August 2023

Vendor to submit quotation to AFRL/RI to design, manufacture, install and test an unclassified Radio Frequency Shielded Chamber (herein referred to as Chamber) as described below. Intended testing applications for this chamber include generic RF/OTA testing of radio equipment, and near and far-field antenna measurements.

1. Specifications and Performance

Basic Physical Attributes:

· The chamber shall be 28.0 ' long x 18.0 ' wide x 11.0 ' high.

· The chamber shall fit into the existing lab (AFRL/RI Building 3, room I5-C) and utilize the existing door area for access.

· The approximate dimensions of this room are 30’ 7.5” long x 19’ 11.5” wide x 12’ high.

· The design of the chamber shall be such that the structural system will make chamber completely self-supported.

· The design of the chamber shall meet seismic considerations for a Risk Category II, Importance Factor I, Site Class D, Seismic Design Category B.

· The Chamber’s enclosure will meet or exceed the minimum functional requirements (as listed herein. This includes but is not limited to the entire six-sided RF enclosure, the RF door, waveguides for HVAC and/or piping, and RF filters for electrical.

· See Section 2 for additional details.

Applicable Specifications:

· IEEE Std 299-1997 IEEE Standard Method for Measuring the Effectiveness of the Electromagnetic Shielding Enclosures

· MIL-F-15733 Filters and Capacitors, Radio Frequency Interference, General Specification

· ANSI/UL-1283 Standard for Safety, Electromagnetic Interference Filters

· MIL-STD-220A - Method of Insertion Loss Measurement for Radio Frequency filters.

· UL 1283 - Standard for Safety - Electromagnetic Interference Filters.

Code Considerations:

A. The design shall conform to functional and descriptive data as found in the most current issues of the following publications:

1. Air Force Handbook 32-1084, Standard Facility Requirements Handbook.

2. National Electric Code

3. National Fire Protection Association (NFPA) Life Safety Code NFPA 101

4. National Plumbing Code

5. International Building Code (I.B.C.)

6. Uniform Federal Accessibility Standards

7. AFI 32-1032, Programming Civil Engineering Resources.

B. Other project-specific Federal Standards (FED STD):

1. Unified Facilities Criteria (UFC)

2. DoD Unified Design Guidance

3. Regulations and/or Federal Specifications (FED SPECs) that shall be cited as applicable in the Statement of Work (SOW) for each individual project Delivery Order (DO).

4. The Federal Acquisition Regulation (FAR), regarding Green Procurement; specifically clauses FAR 23.202, FAR 23.403 , FAR 23.703

Frequency Range:

· 1 GHz to 40 GHz

RF Shielding Performance:

· Unless stated otherwise, components are guaranteed to meet the following attenuation performances:

90dB from 28 GHz to 40 GHz

RF Reflectivity Performance:

· -30dB or better from 1GHz to 40GHz+

2. RF Shielded Enclosure Materials

Description:

· The Chamber shall have Detailed drawing package for AFRL/RI approval, including up to 2 revisions.

· A revision includes changes that are within the quoted scope of work, are minor in nature (e.g., adding/relocating vents, pipe pens, filters, etc.) and do not require a material design re-configuration or fundamental design change to the product.

· The Chamber shall have Operation and Maintenance manual.

· The Chamber shall have all intrusions documented, including their actual EMI filter amount.

· The MSDS sheets of all absorber materials and adhesives used to install the materials shall be provided.

Door:

· The Chamber shall include at 1 reversible RF Shielded 36” Door, c/w hinges, latch points, low profile sill for equipment carts, phenolic lever handle, auto latch. 10 GHz to 40 GHz

· The Chamber door shall be easily opened by anyone working in the area without the aid of electrical power or without any other mechanism that is prone to failure. Safety features will be incorporated to prevent any personnel from accidently being locked inside the chamber.

Floor:

· The Chamber shall have RF floor system, with walkway from Test Bench to unit under test area.

HVAC:

· The Chamber shall have (4) four RF waveguide air vents / 2 supply, 2 return, in the ceiling - sized min. 12 x 12 each, For attachment of HVAC ductwork by AFRL.

Power, Communications, RF Penetrations and Filters:

· Power & Penetrations

· All power shall be filtered external to the Chamber before entering Chamber.

· The Chamber shall have adequate grounding for all equipment and Test Bench, which is UL certified and complies with all local building codes.

· The Chamber shall have a single point ground.

· The Chamber shall N number of 110V 20 Amp circuits located near the Test Bench, a transmitter location, and positioner location.

· The Chamber shall N number of 220V 50 Amp circuits located near the Test Bench, a transmitter location, and positioner location.

· Communication, Connectors & Penetrations

· Any communications cabling penetrating the Chamber’s perimeter shall be fiber optic cable.

· The Chamber Shall have N number of:

· 10/100/1000 Base T Ethernet Fiberoptic Filters

· GPIB Fiberoptic Feedthrough

· USB Fiberoptic Filters

· RS232/485 Fiberoptic Filters

· BNC RF Coaxial Feedthroughs

· SMA RF Coaxial Feedthroughs

· TNC RF Coaxial Feedthroughs

· RF

· The Chamber Shall have a bulkhead Panel, for mounting RF Feedthroughs

· N Port Fiber Optic Feedthrough, for up to 40 GHz applications

· N number of NPT Brass Feedthrough Waveguides (Up to 6.5 GHz)

Alarms, Sprinkler and Sprinkler Interface:

· The Chamber shall have a Fire Alarm c/w filter.

· The chamber shall have (6) sprinkler heads inside, piped through the ceiling with piping for single point connection, For attachment of sprinkler piping by AFRL/RI.

· Sprinkler specifications:

· Quick response

· Upright heads in the pendant position

· 11.2 k-factor minimum

· Maximum spacing 9 ft with maximum of 80 sqft of coverage per head (0.6 gpm/sqft)

· Sprinkler drops minimum of 11" below tip of the absorber (for 22" absorbers)

· Location and design of the sprinklers inside chamber shall be such as to minimize RF Shielding Performance negative impacts.

Lighting:

· The Chamber shall have N number of LED lights, c/w any fixtures to illuminate inside chamber.

· The Chamber shall have a battery powered emergency lighting, c/w any fixtures.

· The Chamber shall have an illuminated emergency exit sign.

· Locations of all lights/fixtures inside the Chamber shall be such as to minimize RF Shielding Performance negative impacts.

3. Absorber Materials

· The Chamber shall have complete coverage of all internal walls, ceiling, floor, any vents, etc. with absorber to meet RF Shielding Reflectivity Performance.

· The Chambers absorber material shall be:

· Pyramidal Polystyrene or Polypropylene absorber

· Closed Cell, uniform carbon loading, light weight

· Resistant to humidity

· Compliant with fire retardancy ISO 11925-2 Class E

· Power handling 600 W/sq m

4. Chamber’s Internal Equipment

Test Bench:

· The Chamber shall contain QTY 1 Electrostatic Discharge Compliant Test Bench

· Includes LED lights to illuminate entire bench and power strip running the length of the bench with outlets.

· Power strip plugs in standard wall outlet.

· Test Bench location such that such as to minimize RF shielding performance negative impacts.

Hardened HD Camera System:

· 30X optical zoom, full HD 1080P

· 200V/m – 18GHz

· Compliant to CISPR 25, Class 5

· Full HDc1920x1080 (25p or 30p)

· Remote controlled zoom, focus, iris

· Auto focus, auto iris

· Shielded Mains Power Supply for Camera with Pan/Tilt

· Includes 5m power supply cable

· Wall bracket, 70cm, ferrite mounting

· Length: approx. 0.70m

· Material: GRP and PVC

· Max load: 10kg

· Wall mounted

· HD controller for 1 HD camera in metal shielded 19” housing

· Manual control of zoom, focus, pan/tilt

· Configurable to control up to 4 cameras

· Fiber-optic converters for HD-SDI video

· Fiber optic cable duplex, 10m, 50/125 um glass fiber (ST-ST)

· Connection from camera controller

5. RF Acceptance Testing

· The Chamber shall be Certified for RF Shielding Effectiveness at 1 GHz, and 40 GHz, to IEEE 299, and a Certified report shall be provided.

6. Freight to: Rome, NY 13441

· Freight: Shielding Materials incl. Panels, Framing, Doors

· Freight: EMC Equipment

· Freight: Absorber Material

7. Installation

· Vendor will utilize only factory-trained personnel for the erection of the anechoic chamber. Workmanship will be consistent with the highest industry standards and/or commercial practices.

· AFRL/RI will provide direction/support from electricians.

· Electrical from building to Chamber will be performed by AFRL/RI

· AFRL/RI will provide direction/support from HVAC and Fire Suppression.

· HVAC from building to Chamber will be performed by AFRL/RI

· Fire Suppression system from building to Chamber will be performed by AFRL/RI