Low cross‐polarisation high‐isolation frequency scanning aperture coupled microstrip patch antenna array with matched dual‐polarisation radiation patterns

Saeidi-Manesh, Hadi; Mirmozafari, Mirhamed; Zhang, G.

doi:10.1049/el.2017.1282

Cited by 22 publications

(9 citation statements)

References 9 publications

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“…However, ρ hv is low and not up to expectations due to the antenna beam mismatch and other system instability issues. The beam mismatch is being addressed by a redesign of the frequency-scan dual-polarization column antennas (Saeidi-Manesh et al, 2017). The CPPAR electronics is also being redesigned and rebuilt to have a stable system so that many CPPAR related issues such as commutating scan, sector-to-sector isolation, surface wave effects, and accurate weather measurements can be addressed/demonstrated.…”

Section: Polarimetric Par Technologymentioning

confidence: 99%

Current Status and Future Challenges of Weather Radar Polarimetry: Bridging the Gap between Radar Meteorology/Hydrology/Engineering and Numerical Weather Prediction

et al. 2019

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After decades of research and development, the WSR-88D (NEXRAD) network in the United States was upgraded with dual-polarization capability, providing polarimetric radar data (PRD) that have the potential to improve weather observations, quantification, forecasting, and warnings. The weather radar networks in China and other countries are also being upgraded with dual-polarization capability. Now, with radar polarimetry technology having matured, and PRD available both nationally and globally, it is important to understand the current status and future challenges and opportunities. The potential impact of PRD has been limited by their oftentimes subjective and empirical use. More importantly, the community has not begun to regularly derive from PRD the state parameters, such as water mixing ratios and number concentrations, used in numerical weather prediction (NWP) models.In this review, we summarize the current status of weather radar polarimetry, discuss the issues and limitations of PRD usage, and explore potential approaches to more efficiently use PRD for quantitative precipitation estimation and forecasting based on statistical retrieval with physical constraints where prior information is used and observation error is included. This approach aligns the observation-based retrievals favored by the radar meteorology community with the model-based analysis of the NWP community. We also examine the challenges and opportunities of polarimetric phased array radar research and development for future weather observation.Citation: Zhang, G. F., and Coauthors, 2019: Current status and future challenges of weather radar polarimetry: Bridging the gap between radar meteorology/hydrology/engineering and numerical weather prediction. Adv. Atmos. Sci., 36(6), 571-588, https://doi.org/10.1007/s00376-019-8172-4.Article Highlights:• The current status/limitations and future challenges/opportunities of weather radar polarimetry are reviewed.• The gaps between the radar meteorology/hydrology/engineering and NWP communities are revealed, and possible approaches to bridge them discussed. • New methods and technologies that advance weather radar polarimetry to meet future needs are explored.

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Section: Polarimetric Par Technologymentioning

confidence: 99%

Current Status and Future Challenges of Weather Radar Polarimetry: Bridging the Gap between Radar Meteorology/Hydrology/Engineering and Numerical Weather Prediction

et al. 2019

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“…Based on weather radar requirements and deficiencies of the planar array antenna, a cylindrical polarimetric phased‐array antenna is designed and proposed for MPAR application. The CPPAR demonstrator, a 2 m diameter cylindrical array antenna designed and fabricated by the Advanced Radar Research Center (ARRC) of the University of Oklahoma (Saeidi‐Manesh et al, ), is shown in Figure a. As shown in Figure b M × N element cylindrical array antenna consists of N rows of M‐element circular array antenna.…”

Section: Planar or Cylindrical Geometry?mentioning

confidence: 99%

High‐Isolation Low Cross‐Polarization Phased‐Array Antenna for MPAR Application

et al. 2017

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The design and analysis of 12 × 12‐element planar array of a dual‐polarized aperture‐coupled microstrip patch antenna operating in the frequency band of 2.7 GHz to 3.0 GHz for multifunction applications are presented. High‐isolation between horizontal and vertical polarization ports and low cross‐polarization are achieved through an aperture‐coupled feed. The reflection coefficient and the isolation of horizontal and vertical ports at different scan angles are examined. The array antenna is fabricated and its radiation patterns are measured in the far‐field and near‐field chambers. The embedded element pattern of designed element is measured in the near‐field chamber and is used for calculating the array scanning radiation pattern.

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“…Taking advantages of PDMs, the effective bandwidth can be doubled [1]. However, PDM requires strict cross-polarisation discrimination (XPD) of the adopted orthogonally polarised antenna [2][3][4][5]. Recently, satellite communications on the move (SOTMs) are undergoing rapid advancement.…”

Section: Introductionmentioning

confidence: 99%

Far‐field cancellation of cross‐polarisation based on mirroring subarrays of densely arranged PDM apertures

Wang

et al. 2020

IET Microwaves, Antennas & Propagation

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Achieving highly directional planar array antennas with sufficient cross‐polarisation discriminations (XPDs) is crucial for satellite communications based on the polarisation‐division multiplexing (PDM). In this work, the authors propose a robust three‐step approach that can be used to significantly enhance the XPD of such array antennas in the normal and nearby directions based on mirroring subarrays, especially when the radiation elements are densely arranged. Theoretical, simulation and experimental results show that by dividing an in‐phase feed array into two or four identical subarrays and properly mirroring them with a differentially feeding, the XPD can be remarkably enhanced by means of far‐field cancellation, regardless of the scale and the XPD of the original array. It provides a practical and robust solution to obtain compact PDM antennas satisfying strict XPD requirements.

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Low cross‐polarisation high‐isolation frequency scanning aperture coupled microstrip patch antenna array with matched dual‐polarisation radiation patterns

Cited by 22 publications

References 9 publications

Current Status and Future Challenges of Weather Radar Polarimetry: Bridging the Gap between Radar Meteorology/Hydrology/Engineering and Numerical Weather Prediction

Current Status and Future Challenges of Weather Radar Polarimetry: Bridging the Gap between Radar Meteorology/Hydrology/Engineering and Numerical Weather Prediction

High‐Isolation Low Cross‐Polarization Phased‐Array Antenna for MPAR Application

Far‐field cancellation of cross‐polarisation based on mirroring subarrays of densely arranged PDM apertures

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