Description
The Fermi National Accelerator Laboratory is seeking a proposal for the supply of 36 units of 4 1/16" coaxial dual directional couplers for the 325 MHz system. The couplers must meet specific technical requirements, including a center frequency of 325 MHz, bandwidth of 5 MHz, and power handling of 20 kW CW forward. The proposal must include a completed SARC and PUR-466 form, and the supplier must be deemed responsible and technically acceptable. The award will be made to the supplier who offers the best value, represented by the lowest price of technically acceptable offerors.
Key features of the required couplers include:
* 4 1/16" EIA-type, 50 ohm, flange-mounted
* Swivel flange on one end and fixed flange on the other
* Inner conductor OD 1.711" and ID 1.631"
* Coupling of 50 +/- 0.5 dB for forward and reverse at 325 MHz
* Directivity of ≥ 35 dB across bandwidth
* Mainline VSWR of < 1.05:1
* Insertion loss of < 0.03 dB
* Coupling port VSWR of ≤ 1.2:1
* Pressure rating of airtight up to 5 PSIG internal pressure
* Material of copper/brass, with a RoHS compliant surface finish