Comparative Study of Low Sidelobe Time Modulated Linear Arrays with Different Time Schemes

Yang, Shiwen; Gan, Yeow-Beng; Tan, Puay‐Hoon

doi:10.1163/1569393042954910

Cited by 70 publications

(57 citation statements)

References 6 publications

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“…τ k and t 0k can be normalized in one time modulation period T p . Thus, according to (3) and (4), the array factor of the TMLA at the center frequency (n = 0), the first positive sideband (n = 1) and the first negative sideband (n = −1) can be written as (5)- (7), respectively, given by…”

Section: Electronic Beam Steering Techniquementioning

confidence: 99%

See 1 more Smart Citation

A Novel Electronic Beam Steering Technique in Time Modulated Antenna Array

Li¹,

Yang²,

Chen³

et al. 2009

PIER

150

102

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Abstract-In this paper, a novel technique for electronic beam steering in time modulated linear array (TMLA) is proposed. The beam steering technique is realized at the first sideband by controlling the switch-on time sequences of each element in the TMLA without using phase shifters. The differential evolution (DE) algorithm is employed to improve the gain and suppress the sidelobe levels (SLLs) at both the center frequency and the first sideband, simultaneously. An S-band 8-element double-layered printed dipole linear array was used to verify the technique experimentally. Measured results are compared with numerical data, and good agreement is reported. Moreover, some simulation results on the binary phase shift keying (BPSK) modulated signals arriving from different directions received by the proposed approach are presented, which validates the application of the proposed beam steering technique.

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Section: Electronic Beam Steering Techniquementioning

confidence: 99%

“…Due to the time modulation that the TMAAs generate unwanted sidebands spaced at multiples of the time modulation frequency, which may cause the energy losses. Some studies on minimizing sideband level (SBL) were proposed in [2][3][4][5]. However, sidebands are not always harmful to the TMAAs.…”

Section: Introductionmentioning

confidence: 99%

A Novel Electronic Beam Steering Technique in Time Modulated Antenna Array

Li¹,

Yang²,

Chen³

et al. 2009

PIER

150

102

View full text Add to dashboard Cite

show abstract

“…Toward this end, many techniques have been proposed based on differential evolution (DE) [4][5][6][7], simulated annealing (SA) [8], and particle swarm optimizer (P SO) [9][10][11] aimed at minimizing the sideband level (SBL) [4], namely the peak level of the harmonic patterns, or the overall harmonic content [9] or both [11] by suitably defining the timepulse durations. The possibility to modify the periodic waveforms has been also examined in [12][13][14][15] to achieve a better handling of the SRs.…”

Section: Introductionmentioning

confidence: 99%

An Iterative Approach for the Synthesis of Optimized Sparse Time-Modulated Linear Arrays

Rocca¹,

D’Urso²,

Poli³

2013

PIER B

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Abstract-In this paper, the synthesis of sparse time-modulated linear arrays with minimum number of elements and controlled harmonic radiations is investigated. The proposed iterative approach based on a particle swarm optimization is aimed at finding the array configuration with the minimum number of elements and the optimal pulse sequence that affords a beam pattern with the same features of a reference one also limiting the amount of sideband radiations under a specific threshold. A set of representative numerical examples is discussed to assess the effectiveness and the reliability of the proposed approach.

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“…The approach utilizes a direct optimization of the "switch-on" time sequence of each array element via the Simple Genetic Algorithm (SGA). Some other recently reported and significant research works on time-modulated antenna arrays include synthesis of shaped beam patterns [11], investigations on various time sequences [12,13], full wave simulation of time-modulated antenna arrays in frequency domain [14], mutual coupling compensation [15], and time-domain analysis of time-modulated antenna arrays [16].…”

Section: Introductionmentioning

confidence: 99%

Design of Time-Modulated Linear Arrays With a Multi-Objective Optimization Approach

Pal¹,

Das²,

Basak³

2010

PIER B

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Abstract-This article proposes a Multi-objective Optimization (MO) framework for the design of time-modulated linear antenna arrays with ultra low maximum Side Lobe Level (SLL), maximum Side Band Level (SBL) and main lobe Beam Width between the First Nulls (BWFN). In contrast to the existing optimization-based methods that attempt to minimize a weighted sum of SLL, SBL, and BWFN, we treat these as three distinct objectives that are to be achieved simultaneously and use one of the best known MultiObjective Evolutionary Algorithms (MOEAs) of current interest called MOEA/D-DE (Decomposition based MOEA with Differential Evolution operator) to determine the best compromise among these three objectives. Unlike the single-objective approaches, the MO approach provides greater flexibility in the design by yielding a set of equivalent final solutions from which the user can choose one that attains a suitable trade-off margin as per requirements. We compared time-modulated antenna structures with other methods for linear array synthesis such as the excitation method and the phase-position synthesis method on the basis of the approximated Pareto Fronts

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Comparative Study of Low Sidelobe Time Modulated Linear Arrays with Different Time Schemes

Cited by 70 publications

References 6 publications

A Novel Electronic Beam Steering Technique in Time Modulated Antenna Array

A Novel Electronic Beam Steering Technique in Time Modulated Antenna Array

An Iterative Approach for the Synthesis of Optimized Sparse Time-Modulated Linear Arrays

Design of Time-Modulated Linear Arrays With a Multi-Objective Optimization Approach

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