Performance Analysis of Cross Beam Correlation Microwave Radiometers Using Two Orthogonal Subarrays

Feng, Xiaolong; Liu, Hao; Zhang, Cheng; Han, Donghao; Guo, Xi; Niu, Lijie

doi:10.1109/tgrs.2024.3371973

Cited by 1 publication

(2 citation statements)

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“…In order to achieve the positive and negative sidelobe solid angle equality by window function, the distribution characteristics of negative sidelobes in Mills cross array need to be known first [11].…”

Section: Sidelobes Distribution Characteristics Of Mills Cross Arraymentioning

confidence: 99%

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Improvement Method of Antenna Negative Sidelobes on Cross Beam Correlation Microwave Radiometer

Feng,

Liu,

Zhang

et al. 2024

Remote Sensing

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A weighting method is proposed for the correlation radiation measurement system based on Mills cross array. The Mills cross array achieves high spatial resolution by the product of two orthogonal fan beams. However, the product power pattern of the Mills cross array lacks a square operation, resulting in sidelobe deterioration and the presence of negative sidelobes. Therefore, a window function is necessary to improve beam performance. However, because of the negative sidelobes, the antenna array is sensitive to the weighting function, and common window functions such as Hanning and Hamming are not suitable for achieving optimal antenna performance. A weighting method is proposed to fully utilize the feature that the received energy of positive and negative sidelobes cancel each other out and to reduce the influence of antenna sidelobe errors in radiation measurement. Such a weighting function can be obtained by combining the combined cosine window function with the existing particle swarm optimization (PSO). The optimized window function is evaluated through numerical simulation and compared with the typical window function weighting results. The results show that this weighting method can minimize the impact of negative sidelobes and reduce the loss of spatial resolution.

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Section: Sidelobes Distribution Characteristics Of Mills Cross Arraymentioning

confidence: 99%

“…For the measurement model depicted in Figure 1, the correlation result of the output signals of the two sector beams can be expressed as [10,11]:…”

Section: Introductionmentioning

confidence: 99%

Improvement Method of Antenna Negative Sidelobes on Cross Beam Correlation Microwave Radiometer

Feng,

Liu,

Zhang

et al. 2024

Remote Sensing

Self Cite

View full text Add to dashboard Cite

show abstract

Performance Analysis of Cross Beam Correlation Microwave Radiometers Using Two Orthogonal Subarrays

Cited by 1 publication

References 35 publications

Improvement Method of Antenna Negative Sidelobes on Cross Beam Correlation Microwave Radiometer

Improvement Method of Antenna Negative Sidelobes on Cross Beam Correlation Microwave Radiometer

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