RF Anechoic Chamber_Questions_Answers_R2.docx

FA875123R0012 RF Anechoic Chamber- Questions/Answers:

Q1: In order to select the proper Anechoic Absorber material for the floor, walls, and ceiling interior surfaces, we need to understand the testing application(s) and desired reflectivity performance, for example:

1.) Far-Field 2/3D Antenna Pattern Measurements

· No 2.) Near-Field Range measurements

· No 3.) Radar Cross Section (RSC)

· No 4.) Electromagnetic Compatibility (EMC) testing (MIL STD 461 and/or RTCA DO160)

· No 5.) Functionality measurements of phased array antennas

· No 6.) Other?

· Generic RF/OTA testing of radio equipment A1: See answers under numbered list above.

Q2: Will the chamber be used for radiated immunity testing at a frequency below 1GHz, such that ferrite tile paneling will be required?

A2: No.

Q3: Does the door need to comply with ADA specifications? Will a manual ramp be acceptable?

A3: Yes, the door needs to comply with ADA specifications. A ramp is not required; this will be an in-house part.

Q4: The absorber requirements in your specifications are not possible to comply with by any vendor. What normal reflectivity performance do you need and at what frequency range? For example: Min -20db from 1GHz to 40 GHz.

A4: Acknowledge that there is an error in the specifications. The absorber should meet RF reflectivity requirements, NOT RF shielding requirements. Desired reflectivity is -30dB or better from 1GHz to 40GHz+. The specifications document has been updated accordingly. See most current version entitled: Attch 1_Chamber Specifications_23r12_R2.

Q5: Will you accept polypropylene absorber in place of polystyrene?

A5: Yes, polypropylene is fine, so long as it doesn’t degrade RF performance. The specifications document has been updated accordingly. See most current version entitled: Attch 1_Chamber Specifications_23r12_R2.

Q6: Can you provide more detail regarding your wall bracket with ferrite requirement? No detail is provided in the documentation.

A6: The specifications document has been updated to clarify this requirement. See most current version entitled: Attch 1_Chamber Specifications_23r12_R2.

Q7: Do any of the documents call out a list of countries from which products are allowed?

A7: The clause at DFARS 252.225-7021, Trade Agreements is included in the solicitation by reference. The full-text version of this clause, which can be viewed at www.acquisition.gov, contains listings of both designated countries and qualifying countries within.

Q8: Are we correctly interpreting the Trade Agreements clause at DFARS 252.225-7021 that we cannot supply materials from China?

A8: The chamber deliverable must comply with the clause at DFARS 252.225-7021, Trade Agreements, which is included in the solicitation. As noted in the response to Q7 above, a listing of both designated countries and qualifying countries can be found in the full-text version of the clause at www.acquisition.gov.