Time Reversal Based Broadband Synthesis Method for Arbitrarily Structured Beam-Steering Arrays

Zhao, Deshuang; Jin, Yufeng; Wang, Bing‐Zhong; Zang, Rui

doi:10.1109/tap.2011.2167904

Cited by 30 publications

(13 citation statements)

References 26 publications

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“…Generally, optimizing far-field patterns of tightly-coupled array is time-consuming and difficult. The spatial and temporal focusing characteristic of time-reversed electromagnetic wave can be used to optimize the beam-steering arrays with strong coupling [18]. The amplitude and phase of the excitation signal of each element can be determined adaptively by using the time reversal synthesis method (TRSM) [19].…”

Section: A Wide-angle Scanning Array With the Proposed Jpm-type Wimentioning

confidence: 99%

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Planar Phased Array With Wide-Angle Scanning Performance Based on Image Theory

Ren

Wang

Ding

et al. 2015

IEEE Trans. Antennas Propagat.

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136

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Abstract-A wide-beam antenna and a planar phased array with wide-angle scanning performance based on image theory are proposed. To solve the wide-angle scanning problem, a summative evaluation of basic types of carrier-based antennas is given and the antenna types available for wide-angle scanning arrays or end-fire arrays are pointed out. Afterwards, a wide-angle scanning array with an artificial magnetic conductor (AMC) ground is proposed. The main beam direction of the array can scan from -89° to 90° in the H plane with a gain fluctuation less than 3 dB and the scanning 3 dB beam-width can cover a range from -105° to 105°. An excellent wide-angle scanning performance from the broadside direction to the end-fire direction can be obtained by the proposed method, which can be used to guide the design of wide-angle scanning arrays.Index Terms-Artificial magnetic conductor (AMC), image theory, planar phased array, wide-angle scanning.

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Section: A Wide-angle Scanning Array With the Proposed Jpm-type Wimentioning

confidence: 99%

“…Compared to the conventional array synthesis methods, TRSM has the following characteristics [18]: (1) The element mutual coupling is not required to be measured. (2) All the element excitation can be determined by a single TR operation.…”

Section: A Wide-angle Scanning Array With the Proposed Jpm-type Wimentioning

confidence: 99%

Planar Phased Array With Wide-Angle Scanning Performance Based on Image Theory

Ren

Wang

Ding

et al. 2015

IEEE Trans. Antennas Propagat.

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136

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“…The detailed description of the two kinds of dipole arrays can be found in our recent work, in which they were used as examples to demonstrate the time reversal-based broadband pattern synthesis of arbitrarily structured arrays. [16] In this paper, we emphasis on fast sampling and processing of the pulsed echoes received by the linear array and the circular array. The two models are numerically simulated with the time-domain solver of the CST Microwave Studio, and the temporal array echoes are obtained by recording all waves reflected from the feeding ports of the array elements.…”

Section: Basis Function Determinationmentioning

confidence: 99%

Basis function selection for compressed sensing and sparse representations of pulsed radar echoes

Zhao

Wang

et al. 2013

Journal of Electromagnetic Waves and Applications

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Compressed sensing theory supposes that a sparse signal can be sampled at a rate much lower than the Nyquist-Shannon rate and reconstructed with high probability. Such lower sampling rate commonly requires finding a set of the optimal basis functions to sparsely represent the signal first. This paper provides a simple and effective working process to select the basis functions for a family of pulsed radar echoes. The selection process is performed in two steps. First,the waveform matching based on the the known array excitation is carried out to select a mother function from a wavelet dictionary. Second, the spectrum matching principle is used to produce a small set of basis functions from the selected mother function. The proposed method is numerically validated by a pulsed radar system equipped with two different dipole arrays. The results demonstrate that the new method is quite effective. With the selected basis functions, all echoes can be under-sampled at a rate lower than 5% of the conventional Nyquist-Shannon rate and reconstructed with the root mean-squared error of less than 2%.

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“…Furthermore, complex scattering media are shown to enhance the performance of a TRM due to an effective increase in spatial coverage by capturing parts of the waves redirected by scattering [7]. TRMs are studied for both acoustic and electromagnetic waves in various applications such as underwater communications [8][9][10], sensors [11][12][13], wireless communications [4,[14][15][16][17][18], imaging [19][20][21][22], radars [23,24], and beam forming [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Electromagnetic Time Reversal in an Open Semireverberant System

et al. 2014

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We consider nonlinear electromagnetic time reversal (TR) applied to a semireverberant complex enclosure containing a discrete passive nonlinear circuit. Unlike closed reverberant systems used for the previous demonstrations of nonlinear electromagnetic TR, the experimental system used here better represents realistic environments that are often far more lossy. Moreover, we demonstrate the use of pulse inversion to extract nonlinear responses for electromagnetic time reversal, which could help overcome potential practical-implementation issues. Concentrating on the application of this technique as an efficient power-delivery method, we evaluate the peak power enhancement resulting from TR focusing at the location of the nonlinear circuit.PHYSICAL REVIEW APPLIED 2, 044013 (2014) 2331-7019=14=2(4)=044013 (8) 044013-1

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Time Reversal Based Broadband Synthesis Method for Arbitrarily Structured Beam-Steering Arrays

Cited by 30 publications

References 26 publications

Planar Phased Array With Wide-Angle Scanning Performance Based on Image Theory

Planar Phased Array With Wide-Angle Scanning Performance Based on Image Theory

Basis function selection for compressed sensing and sparse representations of pulsed radar echoes

Nonlinear Electromagnetic Time Reversal in an Open Semireverberant System

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