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Analysis of polarization optimization of dual-polarized compact arrays for direction finding, which include Decoupling and Matching Networks (DMNs) comprised of distributed elements, is performed in this paper. The CRLB for two-dimensional Direction of Arrival (DoA) estimation is used as a figure of merit for the performance of five elements dual-polarized circular L-Quad arrays, assuming different...
We investigate in this paper the effects of Decoupling and Matching Networks (DMNs) to the polarization characteristics of single-polarized microstrip patches used for the Direction of Arrival (DoA) estimation of impinging waves. Additionally, we present results on the Cramer-Rao Lower Bound (CRLB), used as a performance metric, with the aim of evaluating the impact of polarization on the capabilities...
Noise radar is an emerging technology which employs random signals as their transmit waveforms. Relying on its stochastic properties, with the proper choice of system s parameters, high performance with respect to the suppression of range ambiguity and low range sidelobes can be achieved. Many works have been published in the literature addressing systems that transmit carriers modulated in amplitude...
Noise Radars are electromagnetic systems that use random signals for detecting and locating reflecting objects. Besides high performance with respect to the suppression of range ambiguity in the detection of targets and low range sidelobes, they also present an intrinsic property of low probability of interception by other systems, due to the stochastic nature of their transmit waveforms. Traditional...
This paper presents results on optimization of antenna arrays to be used for Direction of Arrival (DoA) estimation using Cramér-Rao Lower Bounds computation. In our work, we apply the optimization to an L-quad antenna array and to a nonuniform patch array and compare the results in terms of direction finding capability. The aim of the optimization procedure is to increase the DoA estimation ability...
Current excitation of each active element in a phased array antenna allows for the generation of a specific beam shape. Nevertheless, the transmitter amplifiers can add constraints to the amplitude weights used for feeding the elements. This paper proposes an optimization method for generating a phase-only radiation pattern based on the least squares methods. Furthermore, a comparison is drawn between...
Current excitation of each active element in a phased array antenna allows for the generation of a specific beam shape. Nevertheless, the transmitter amplifiers can add constraints to the amplitude weights used for feeding the elements. This paper proposes an optimization method for generating a phase-only radiation pattern based on the least squares methods. Furthermore, a comparison is drawn between...
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