Sidelobe Minimisation in Active Phased Arrays

Revankar, U.K.; Beenamole, K. S.; Sreenivasulu, K.; Veerabhadra, K.M.

doi:10.1080/02564602.2001.11416961

Cited by 6 publications

(7 citation statements)

References 2 publications

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“…Most of the improvements focus on the time-difference and the spatialdifference discretizations. Discrete singular convolution-symplectic integrator propagator (DSC-SIP) method [2,3] has been reported to solve transmission problems since 2005, where the DSC method is used to improve the spatial-difference [2] and the SIP is used to improve the time-difference. Compared with the standard FDTD method, DSC-SIP method has second-to fourth-order accuracy in time domain and have 2*M (1 M < 6) order accuracy in spatial domain.…”

Section: Discussionmentioning

confidence: 99%

“…The article is organized as the follows, in Section 2, the SIP [3] and DSC schemes are introduced. In Section 3, the connection boundary between the total/scattered fields is modified to meet DSC-SIP requirement.…”

Section: Discussionmentioning

confidence: 99%

“…Regarding the quantization lobe, feeding antenna elements to cause a quadratic phase distribution across the array can reduce the level of quantization lobes as a result of it breaking up the periodicity of phase error on the array [1]. A phase randomization method [3] can also effectively reduce the quantization lobes.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A study on antenna gain degradation due to digital phase shifter in phased array antennas

Kamoda¹,

Tsumochi²,

Kuki³

et al. 2011

Micro & Optical Tech Letters

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We studied antenna gain degradation of phased array antennas due to phase quantization by digital phase shifters, where the amplitude weighting for element excitation and the losses in the phase shifters were taken into account. By adding a phase offset to the ideal analog phase shifts before they are quantized, the degradation can be varied as a result of the change in the phase errors due to quantization. It was shown that the amplitude weighting and losses greatly affected the peak‐to‐peak variation of the degradation and they must be taken into account to obtain the optimum phase offset that gives the least degradation in actual phased array antennas using digital phase shifters. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26145

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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A study on antenna gain degradation due to digital phase shifter in phased array antennas

Kamoda¹,

Tsumochi²,

Kuki³

et al. 2011

Micro & Optical Tech Letters

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“…Hence the choice of bits is very important. Out of the several methods proposed for reducing the quantisation lobe level, Two Probable Value Method [8] reduces the SLL to −12n dB, for large n. This method has been used in the present study to reduce the quantisation lobe level introduced in the radiation pattern of active phased array antenna, and has been discussed in detail in our earlier work [9]. The effect of 6 bit amplitude and phase quantisation on array performance, clearly exhibiting degradation in SLL has been shown in Figures 2 and 3.…”

Section: Effect Of Quantisation Errors On the Active Phased Array Antmentioning

confidence: 99%

Performance Appraisal of Active Phased Array Antenna in Presence of a Multilayer Flat Sandwich Radome

Kedar¹,

Beenamole²,

Revankar³

2006

PIER

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Abstract-This paper studies the performance appraisal of radiation performance of ultra low sidelobe level Active Phased Array Antennas in presence of Multilayer Flat Sandwich Radome. Further, the effect of errors introduced due to amplitude/phase quantisation and planarity of the array surface, on the radiation performance has been studied. Based on these errors, manufacturing tolerances of the Flat Sandwich Radome have been suggested to control the deterioration of radiation performance within tolerable limits. This work is expected to be useful in development/manufacturing of radomes for Active Phased Array Radars and similar applications where ultra low sidelobe levels are required to be maintained.

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“…The Chebyshev distribution used in [6,7] presents problems with edge effects and mutual coupling for large number of elements and for side lobe levels below −22 dB [1]. Complex weighted excitations with digitally controlled attenuators and phase shifters with discrete attenuation and phase states have been discussed and used in active phased arrays to realize low sidelobe levels [8]. In this case too, only simulation results are presented.…”

Section: Introductionmentioning

confidence: 99%

Antenna Array Using Non-Identical Truncated Circular Elements for FSLL Reduction

Singh¹,

Sarwade²,

Ray³

2018

PIER M

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Resonance frequency of a Circular Microstrip Antenna (CMSA) depends on its diameter. Hence when CMSA is truncated or sectored into smaller elements, keeping the diameter same, it resonates at almost the same frequency. An analysis of the new antenna arrays designed using these truncated non-identical CMSA elements to realize an amplitude distribution over pedestals leading to a desired first side lobe level (FSLL) has been presented. Truncated elements are designed as non-identical elements based on their gain variation with respect to the standard normalized aperture distribution coefficients. Experimental verification to validate the proposed concept and simulated results has been carried out using an antenna array with eight non-identical elements. There is good agreement between simulated and measured results at 1.76 GHz.

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Sidelobe Minimisation in Active Phased Arrays

Cited by 6 publications

References 2 publications

A study on antenna gain degradation due to digital phase shifter in phased array antennas

A study on antenna gain degradation due to digital phase shifter in phased array antennas

Performance Appraisal of Active Phased Array Antenna in Presence of a Multilayer Flat Sandwich Radome

Antenna Array Using Non-Identical Truncated Circular Elements for FSLL Reduction

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