Results 31 to 40 of about 36,878 (167)

Observing irrigation using SWOT SAR Ka-band data from daily calibration and validation acquisitions

Science of Remote Sensing
While primarily designed for ocean and inland water monitoring through Interferometric SAR (InSAR) technology, the Surface Water and Ocean Topography (SWOT) Ka-band SAR sensor also presents a novel potential for agricultural applications.
Henri Bazzi, Nicolas Baghdadi, Cecile Cazals, Sami Najem, Damien Desroches, Frédéric Frappart, Mehrez Zribi, François Charron   +7 more
doaj   +1 more source

A Dual-Band Shared Aperture Antenna Array in Ku/Ka-Bands for Beam Scanning Applications

IEEE Access, 2019
A dual-band shared aperture antenna array for phased array system operated in Ku/Ka-bands is proposed in this paper. By judiciously designing the geometrical structure and parameters, compact and integrated antenna elements are proposed to achieve the ...
Shengying Liu, Kaibo Jiang, Guobing Xu, Xumin Ding, Kuang Zhang, Jiahui Fu, Qun Wu   +6 more
doaj   +1 more source

Matching comparison between Satellite radar DPR and ground-based radar CR and preliminary study of systematic error

暴雨灾害, 2021
In this paper, the observation data measured by the dual-frequency precipitation radar DPR on board the GPM satellite and the ground-based Ka/Ku dual-band radar CR of the Guangdong Longmen Observatory from April to September 2019 are matched in time and ...
Zhenyu ZENG, Liping LIU, Jiafeng ZHENG, Minglong ZOU, Boyong LI   +4 more
doaj   +1 more source

A Ka-Band Cylindrical Paneled Reflectarray Antenna [PDF]

Electronics, 2019
Cylindrical parabolic reflectors have been widely used in those applications requiring high gain antennas. Their design is dictated by the geometric relation of the parabola, which relate the feed location, f, to the radiating aperture, D. In this work, the use of reflectarrays is proposed to increase D without changing the feed location.
greco francesco, boccia luigi, arnieri emilio, amendola gian domenico   +3 more
openaire   +1 more source

Sea Ice Detection by an Unsupervised Method Using Ku- and Ka-Band Radar Data at Low Incidence Angles: First Results

Remote Sensing, 2023
This paper presents the first results of sea ice detection using the data of Ka- and Ku-band radars at low incidence angles. A classification method based on an unsupervised K-means approach is applied to the arrays of the data for the Arctic and ...
Maria Panfilova, Vladimir Karaev
doaj   +1 more source

Rain attenuation distribution characteristic of Ka band satellite communication

Tongxin xuebao, 2006
Using the ITU-R rain attenuation forecasting model,and based on the rainfall data and the geographic location parameters of main cities in our country,the isograms of rain attenuation distribution for the communication satellite with the orbital location
KANG Jian, WANG Yu-fei
doaj   +2 more sources

Surface-Mounted Ka-Band Vivaldi Antenna Array

IEEE Open Journal of Antennas and Propagation, 2021
The first electrically steerable dual-polarized Ka-band Vivaldi antenna array with connector-less, surface-mount interface is developed. The antenna interface includes integrated coaxial feed lines within the antenna element structure and contact pads on
Henri Kahkonen, Juha Ala-Laurinaho, Ville Viikari   +2 more
doaj   +1 more source

Nested Horn‐Based 3D‐Printed Dual‐Band High‐Gain Conical Beam Antenna

IET Microwaves, Antennas & Propagation
Dual‐band antennas have found extensive applications in the fields of communications, guidance, tracking systems, etc. However, traditional designs often struggle to simultaneously achieve high gain, wide impedance bandwidth and conical beam ...
Li Wu, Sipei Wu, Shuai Zhang, Hui Xue, Boyang Qian   +4 more
doaj   +1 more source

Auto-Focusing Imaging and Performance Analysis of Ka-Band Carrier-Frequency-Agility SAR

Remote Sensing
Ka-band carrier-frequency-agility (CFA) synthetic aperture radar (SAR) employs pulse-to-pulse random wide-range frequency hopping to enhance anti-interference capability.
Yushan Zhou, Yijiang Nan, Da Liang, Zhiyuan Xue, Yuesheng Chen, Haiwei Zhou, Yawei Zhao   +6 more
doaj   +1 more source

Analisis Perbandingan Komunikasi Satelit Frekuensi C-Band Dan Ka-Band Di Indonesia

Protek: Jurnal Ilmiah Teknik Elektro, 2020
This paper analyzes the comparison of data communications using GEO satellites between C-band and Ka-band frequencies in Indonesia which has a tropical rain climate. The data communication uses QPSK modulation on the path of four earth stations by paying
Tanridio Silviati Delfina Abdurrahman, Salmiah Salmiah, Saidah Suyuti   +2 more
doaj   +1 more source