C
CI Coman
30 records found
1
Authored
For Accurate estimation of AOA of multiple sources an antenna array can be used. In this paper a comparison between the directions finding capability of three array geometries circular array, uniform- and non-uniform Y-shaped array are presented. the center frequency is 2.25 GHz
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A new family of structures launching the fundamental mode in rectangular waveguides is proposed. Individual or stacked cavity-backed patch antennas radiate into a rectangular waveguide, providing a good matching with a coaxial input over a wide frequency range. The configuration
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A solution to desiging multifunction array antennas is discussed. Distinct system functions performed at separate frequency ranges are associated to sparse sub-arrays that are interleaved in a shared aperture configuration. The sparse architectures are designed using a combinator
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The design aspects concerning the sparse array antennas are discussed. Commonly, the beamwidth, the side-lobes level and the gain are the relevant features in antenna design procedures. These parameters are evaluated for different sparse topologies and generalised design relation
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A consistent strategy for the design of finite array antennas consisting of differently sized radiating elements is discussed. In view of increasing the total bandwidth of the antenna system, while maintaining a low mutual coupling between the elementary radiators, sparse subarra
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A novel structure for launching the fundamental mode in rectangular waveguides is proposed. The geometry consists of a cavity-backed circular patch radiating into a rectangular waveguide. The matching properties of the proposed components are comparable with the ones of the class
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This contribution presents a full-wave analysis and the pertaining design strategies for cavity-backed and probe-fed circular microstrip patch antennas. The analysis procedure is based on the Mode Matching Method that was consitently employed fo charcterizing the feeding circuit,
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A combinatorial method for the design of spatially interlaced sparse array antennas is advocated. The cyclic difference sets are used infinding optimum positions of the elements in the sparse sub-arrays that share a common number of sub-array that can be interwoven on a common ap
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