2451 Crystal Drive Arlington, VA 22245-5200

D -- SHIPBOARD UHF OMNI DIRECTIONAL ANTENNA POC Matthew E. Brandt, PMW 172-12B, 703-602-8279 or Linda Squires, 02-32, 703-602-0660. Synopsis No. 23. Space and Naval Warfare Systems (SPAWAR) is seeking detailed information concerning an omnidirectional UHF antenna for maritime application. Current interest is that the UHF antenna is vertically polarized, a four-element array (minimum) providing omnidirectional azimuth coverage over a frequency range from 1350 to 1850 megahertz (MHz), when mounted around a central support conducting mast ranging from 10.16 cm (four inches) to 38.10 cm (15 inches) in diameter. In addition to general antenna description, the radiation pattern must occur at zero elevation over the 1350 to 1850 MHz band. The horizontal pattern of this antenna must be omnidirectional to within q 2 decibels (dB) over the entire 1350 to 1850 MHz frequency range. Furthermore, the antenna polarization shall transmit or receive vertically polarized RF energy, which is capable of handling up to 400 watts variable peak-envelope-power (PEP) and have maximum dB gain that antenna design approach will allow, alternative designs are encouraged. The impedance at the input to the antenna shall match the 50-ohm impedance of the input coaxial cable, so that the Voltage Standing Wave Ratio (VSWR) does not exceed 2.0:1 over the entire 1350 to 1850 MHz range when mounted. Information submitted should include all available White Papers describing: 1) details of the antenna design, 2) antenna testing and reliability data, 3) delivery and cost data. Please note that this is a Request For Information only, and that no procurement documents for such an antenna exist at this time. SPAWAR may, however, use information obtained through this request when structuring future NDI/COTS procurement documents which may include a requirement for demonstration of the proposed antenna prior to award of any future contract. Interested parties should indicate whether they are small business, small disadvantaged business, or 8(a). This is not a request for proposal (RFP), a promise to issue an RFP, nor a promise by the government to pay for information received in response to this synopsis. Acknowledgement of receipt will not be made nor will telephone inquiries be honored. Proprietary data submitted in response to this synopsis will be protected when designated. A procurement, if any, resulting form this synopsis will be separately synopsized by RFP in the CBD. Interested offerors may send information by 23 February 1995 to: Commander, Space and Naval Warfare Systems Command, Attn: Matthew E. Brandt, RF Systems Engineer, Code: PMW 172-12B, Room 540, 2451 Crystal Drive, Arlington, VA 22245-5200. Please reference this synopsis no. 23 on both mailing envelope and the enclosures. (0053)

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