Phase-only control of antenna sum and shaped patterns through null perturbation

Trastoy, A.; Ares, F.; Moreno, E.

doi:10.1109/74.979495

Cited by 38 publications

(27 citation statements)

References 11 publications

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“…In this example, we obtain a gap of 30 dB between the side lobes at both sides of the main beam. An improvement of more than 10 dB over the results reported in [9,10] has been noticed. The main beam widths in the original Dolph array and the proposed array patterns are 6.7520 ∘ and 7.26 ∘ , respectively, while the taper efficiency has changed from 96.09% to 86.86%.…”

Section: Simulation Resultssupporting

confidence: 53%

“…The first is fully controlled arrays [1][2][3][4][5][6][7] that require full control of weights of all the array elements, while the second is the partially controlled arrays that require few elements' weight to be controllable [8]. In both groups, it is much easier to control the phase distribution of the element excitations than to control the amplitude distribution [9,10]. To synthesize an array pattern with specific constraints on the side lobe structure, various optimization algorithms have been proposed in the literature.…”

Section: Introductionmentioning

confidence: 99%

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Synthesizing Asymmetric Side Lobe Pattern with Steered Nulling in Nonuniformly Excited Linear Arrays by Controlling Edge Elements

Mohammed¹,

Sayidmarie²

2017

International Journal of Antennas and Propagation

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In radar antennas, asymmetric side lobes are useful, where undesired signals such as noise and ground clutter should be minimized. Also, for practical implementation, the feeding network of such antennas should be efficiently designed. In this paper, a simple analytical method for synthesizing asymmetric side lobe pattern with a wide-angle steered null in the nonuniformly excited linear arrays is presented. In this method, the difference in the side lobe levels on both sides of the main beam is achieved by varying just the phase excitations of the two-edge elements. The major novelty of this paper lies in the fact that the required asymmetric side lobe pattern can be achieved by changing a single phase shifter resulting in a simple feeding network.

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Section: Simulation Resultssupporting

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Synthesizing Asymmetric Side Lobe Pattern with Steered Nulling in Nonuniformly Excited Linear Arrays by Controlling Edge Elements

Mohammed¹,

Sayidmarie²

2017

International Journal of Antennas and Propagation

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“…The trivial solution would be amplitude tapering, or, as an extreme case, the use of only a part of the transmit antenna; but this causes a significant loss of radiated power; furthermore, it may lower the overall efficiency since the high-power amplifiers in the T/R modules are no longer driven in saturation. Another solution is phase tapering, but the derivation of appropriate phase coefficients is a complex task that requires, in general, complicated numerical optimization techniques [42], [43].…”

Section: A Limitations Of a Fixed-aperture Illuminationmentioning

confidence: 99%

Multidimensional Waveform Encoding: A New Digital Beamforming Technique for Synthetic Aperture Radar Remote Sensing

Krieger

Gebert

Moreira

2008

IEEE Trans. Geosci. Remote Sensing

356

237

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Abstract-This paper introduces the innovative concept of multidimensional waveform encoding for spaceborne synthetic aperture radar (SAR). The combination of this technique with digital beamforming on receive enables a new generation of SAR systems with improved performance and flexible imaging capabilities. Examples are high-resolution wide-swath radar imaging with compact antennas, enhanced sensitivity for applications like alongtrack interferometry and moving object indication, and the implementation of hybrid SAR imaging modes that are well suited to satisfy hitherto incompatible user requirements. Implementationspecific issues are discussed and performance examples demonstrate the potential of the new technique for different remote sensing applications.Index Terms-Adaptive radar, along-track interferometry (ATI), ambiguity reduction, digital beamforming, displaced phase centre antenna (DPCA), ground moving target indication (GMTI), high-resolution wide-swath SAR imaging, hybrid SAR, MIMO SAR, synthetic aperture radar (SAR), waveform diversity.

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“…The capability of easily reconfiguring the radiation behavior of a direct-radiating array antenna is crucial in several applications, including radar and satellite telecommunications [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Amongst the different kinds of reconfigurability, a very effective one is undoubtedly represented by phase-only control, as it allows both a simplification of the beam forming network and an increase of the amplifiers' efficiency [1][2][3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…Amongst the different kinds of reconfigurability, a very effective one is undoubtedly represented by phase-only control, as it allows both a simplification of the beam forming network and an increase of the amplifiers' efficiency [1][2][3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Circular-Ring Antenna Arrays Being at the Same Time Sparse, Isophoric, and Phase-Only Reconfigurable: Optimal Synthesis via Continuous Aperture Sources

Morabito¹,

Nicolaci²

2018

PIER M

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Abstract-An innovative and general approach is proposed to the optimal, mask-constrained power synthesis of circular continuous aperture sources able to dynamically reconfigure their radiation behavior by just modifying their phase distribution. The design procedure relies on an effective a-priori exploration of the search space which guarantees the achievement of the globally-optimal solution. The synthesis is cast as a convex programming problem and can handle an arbitrary number of pencil and shaped beams. The achieved solutions are then exploited as reference and benchmark in order to design phase-only reconfigurable isophoric circular-ring sparse arrays. Numerical results concerning new-generation telecommunication systems are provided in support of the given theory.

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Phase-only control of antenna sum and shaped patterns through null perturbation

Cited by 38 publications

References 11 publications

Synthesizing Asymmetric Side Lobe Pattern with Steered Nulling in Nonuniformly Excited Linear Arrays by Controlling Edge Elements

Synthesizing Asymmetric Side Lobe Pattern with Steered Nulling in Nonuniformly Excited Linear Arrays by Controlling Edge Elements

Multidimensional Waveform Encoding: A New Digital Beamforming Technique for Synthetic Aperture Radar Remote Sensing

Circular-Ring Antenna Arrays Being at the Same Time Sparse, Isophoric, and Phase-Only Reconfigurable: Optimal Synthesis via Continuous Aperture Sources

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