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System study and design of broad-band U-Slot microstrip patch antennas for aperstructures and opportunistic arrays

An opportunistic array is an integrated ship-wide digital phased-array radar, where antenna elements are placed at available open areas over the entire shipâ s length. Such an array has the potential to fulfill many of the Navyâ s missions, including ballistic missile defence (BMD) where the radar mission encompasses exo-atmospheric surveillance, tracking and preliminary discrimination. Advantages of opportunistic arrays include enhanced stealth â since low-profile antennas reduce the shipâ s RCS; high angular resolution â as the entire shipâ s length forms the â apertureâ and produces a narrow beamwidth; and potentially lower costs â through the use of COTS technology and a flexible digital antenna architecture that reduces the number of distinct radar systems required. This research first investigated the opportunistic array concept in the context of BMD. A system level tradeoff was performed to size the system and verify that detection ranges greater than 1000 km could be achieved. Next, the research focused on designing a low-profile, broad-band U-slot microstrip patch antenna. Theoretical calculations and parametric studies were performed to develop an antenna element that could operate in the upper VHF/lower UHF frequencies. A set of simple design procedures is proposed to provide approximate rules that result in a good â first-passâ design with prescribed characteristics that require minimal tuning.

Identiferoai:union.ndltd.org:nps.edu/oai:calhoun.nps.edu:10945/1802
Date12 1900
CreatorsTong, Chin Hong Matthew
ContributorsJenn, David C., Walters, Donald L., Naval Postgraduate School (U.S.)., Department of Physics
PublisherMonterey California. Naval Postgraduate School
Source SetsNaval Postgraduate School
Detected LanguageEnglish
TypeThesis
Formatxviii, 88 p. : col. ill. ;, application/pdf
RightsApproved for public release, distribution unlimited

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