Time-Modulated Arrays: A Review

Varma, D. Suneel; Ram, Gopi; Kumar, G. Arun

doi:10.1080/02564602.2022.2055669

Cited by 10 publications

(2 citation statements)

References 87 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, many other applications like beam steering, direction finding, Radar communication, and unmanned aerial vehicles (UAVs) require reduced sideband levels (SBL) as well as sidelobe level (SLL). [4][5][6][7] The research on suppression of SBL initially reported with optimized ON time instant and excitation real amplitude in 2002 with 32-element linear array. 3 This paper is a roadmap to the research in timed antenna and their application in various fields.…”

Section: Introductionmentioning

confidence: 99%

“…The proper utilization of sideband radiation can extend the use of TMLAA to various applications like multi‐communication, and multi‐tracking systems. However, many other applications like beam steering, direction finding, Radar communication, and unmanned aerial vehicles (UAVs) require reduced sideband levels (SBL) as well as sidelobe level (SLL) 4–7 …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Power leakage minimization in time‐modulated linear antenna array with optimized switching strategies employing modified harmony search algorithm

Varma

Ram

Kumar

2022

Int J RF Mic Comp-Aid Eng

Self Cite

View full text Add to dashboard Cite

Time-modulated linear antenna array (TMLAA) with periodic time modulation of antenna elements radiates infinite inevitable harmonic beams. The infinite harmonic sideband radiation is a wastage of power unless the power is exploited. This paper aims to minimize inevitable power wastage in the harmonic beams radiated from TMLAA by employing an optimized periodic timing sequence. The optimization of the timing sequence is conducted employing harmony search (HS) to suppress the power wastage, However, conventional HS achieves an acceptable sidelobe level (SLL) below -30 dB. Nevertheless, a modified harmony search algorithm (MHSA) is proposed to attain more power in the desired fundamental beam. The algorithm is validated using an array of 4-, 10-, and 16-element uniform half-wavelength spacing TMLAA. The optimization is conducted on the ON and OFF time instants and the real current of the elements. The simulation results exhibit that HS and MHSA perform potentially alike to suppress the SLL of fundamental below -30 dB. However, the further suppression of the sideband levels employing MHSA justifies the modification proposed in this work. The MHSA performance in terms of radiation parameters is compared with the HS and also with previous works to show the potentiality of the modification.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Power leakage minimization in time‐modulated linear antenna array with optimized switching strategies employing modified harmony search algorithm

Varma

Ram

Kumar

2022

Int J RF Mic Comp-Aid Eng

Self Cite

View full text Add to dashboard Cite

show abstract

Enhanced dual lane detection in automotive radar systems using harmonic coordinated beamforming of time-modulated arrays

Ma,

Long,

Miao

et al. 2024

Wireless Netw

View full text Add to dashboard Cite

Pulse splitting technique for low sidelobe time-modulated antenna array synthesis with harmonic suppression

Sallam,

Attiya

2024

Int. J. Microw. Wireless Technol.

View full text Add to dashboard Cite

In this paper, pulse splitting approach is proposed to simultaneously reduce the sidelobe level (SLL) of fundamental signal and maximum sideband levels (SBLs) of harmonic signals for time-modulated linear array (TMLA). This is achieved by controlling only the periodic switching time sequence of each element of the TMLA. In pulse splitting, the on–off switching sequence of each radiating element is characterized by multiple rectangular sub-pulses within the modulation period which increase the degrees of freedom in order to better synthesize the desired fundamental pattern with simultaneous suppression of harmonic or sideband radiation. A genetic algorithm is employed to optimize the switch-on and switch-off instants of each sub-pulse for each element for 16-element uniform amplitude, phase, and space linear antenna array. The simulation results reveal that the proposed method can achieve the desired patterns with very low SLL and SBLs compared with previous published results.

show abstract

Time-Modulated Arrays: A Review

Cited by 10 publications

References 87 publications

Power leakage minimization in time‐modulated linear antenna array with optimized switching strategies employing modified harmony search algorithm

Power leakage minimization in time‐modulated linear antenna array with optimized switching strategies employing modified harmony search algorithm

Enhanced dual lane detection in automotive radar systems using harmonic coordinated beamforming of time-modulated arrays

Pulse splitting technique for low sidelobe time-modulated antenna array synthesis with harmonic suppression

Contact Info

Product

Resources

About