Jung-Hwan Lim
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View article: Performance Comparison between Monostatic and Bistatic Staring Spotlight Modes Based on Several Scenarios
Performance Comparison between Monostatic and Bistatic Staring Spotlight Modes Based on Several Scenarios Open
This paper analyzes the performance of the bistatic staring spotlight mode in a low-orbit satellite environment and then compares it with the performance of the monostatic staring spotlight mode. The staring spotlight mode provides high-re…
View article: Performance Evaluation of Spaceborne Bistatic SAR Systems
Performance Evaluation of Spaceborne Bistatic SAR Systems Open
In this paper, the performances of spaceborne bistatic synthetic aperture radar (SAR) systems are evaluated and compared with those of the conventional monostatic SAR system. Drawing on information on the altitude of satellites and the pul…
View article: Estimation of Electromagnetic Field Penetration into Concrete Buildings Using a Theoretical Approach Considering External Environmental Factors
Estimation of Electromagnetic Field Penetration into Concrete Buildings Using a Theoretical Approach Considering External Environmental Factors Open
In this paper, we propose a theoretical approach to estimate the power level of electromagnetic waves radiated into a structure by a specific external source. The target structure is a multistory building on a university campus that is use…
View article: Cross-Pol Pattern Effects of Parabolic Reflector Antennas on the Performance of Spaceborne Quad-Pol SAR Systems
Cross-Pol Pattern Effects of Parabolic Reflector Antennas on the Performance of Spaceborne Quad-Pol SAR Systems Open
The ambiguity performance related to the image quality of a synthetic aperture radar (SAR) system can be categorized into range ambiguity, azimuth ambiguity, and cross ambiguity depending on the cause of the ambiguity signals. The ambiguit…
View article: Accuracy Improvement in Measuring the Reflection Coefficient of Curved Composite Reflector Panels
Accuracy Improvement in Measuring the Reflection Coefficient of Curved Composite Reflector Panels Open
Conventionally, to measure the electrical characteristics of a reflector antenna panel made of a composite material, a flat sample was separately manufactured with the same material as the panel or a part of the antenna panel was cut to ma…
View article: Erratum to “Performance Evaluation of a Modified SweepSAR Mode for Quad-Pol Application in SAR Systems”
Erratum to “Performance Evaluation of a Modified SweepSAR Mode for Quad-Pol Application in SAR Systems” Open
In the paper entitled “Performance Evaluation of a Modified SweepSAR Mode for Quad-Pol Application in SAR Systems (Journal of Electromagnetic Engineering and Science, vol. 20, no. 3, pp. 199-206, 2020)”, the Acknowledgments has incorrect i…
View article: Design and Implementation of Lightweight Antenna for Small Satellite SAR with Feeder Strut
Design and Implementation of Lightweight Antenna for Small Satellite SAR with Feeder Strut Open
We designed a lightweight, deployable reflector antenna for use in a small satellite SAR. The CFRP composite material was used for the deployable panel to reduce weight, and a deep reflector type antenna was designed by using a feeder with…
View article: Performance Evaluation of a Modified SweepSAR Mode for Quad-Pol Application in SAR Systems
Performance Evaluation of a Modified SweepSAR Mode for Quad-Pol Application in SAR Systems Open
Efficient earth observation using spaceborne synthetic aperture radar (SAR) requires the analysis of high-resolution wide-swath (HRWS) systems, which have a fine resolution and a short revisit time through wide-area observation, and quadra…
View article: Optimal Design of the Reflector Antenna to Improve Performance of C-Band Quad-Pol ScanSAR Systems
Optimal Design of the Reflector Antenna to Improve Performance of C-Band Quad-Pol ScanSAR Systems Open
The performance of synthetic aperture radar (SAR) antenna determines the quality of images obtained from the spaceborne SAR system, and thus, SAR antenna should be designed to satisfy the target performance of SAR system. The performance i…
View article: Choke Feeder Design for Deep Reflector Antenna in Small Satellite SAR
Choke Feeder Design for Deep Reflector Antenna in Small Satellite SAR Open
In this study, we designed and fabricated a choke antenna as a feeder for a deployable reflector antenna for small satellite spaceborne synthetic aperture radar(SAR). The deep reflector antenna was selected considering the storage efficien…
View article: Measurement of Reflection Coefficient for Curved Panel of Reflector Antenna Using Composite Material
Measurement of Reflection Coefficient for Curved Panel of Reflector Antenna Using Composite Material Open
It is essential to analyze the electrical characteristics of composite materials, such as Carbon Fiber Reinforced Polymer(CFRP), as their electromagnetic properties change according to the method of fabrication. However, the conventional m…
View article: Performance Analysis of Quad-pol SAR System for Wide-Swath Operation Mode
Performance Analysis of Quad-pol SAR System for Wide-Swath Operation Mode Open
In this study, we propose a performance analysis of a quadrature-polarimetric(quad-pol) synthetic aperture radar(SAR) system for wide-swath operation mode and compare it with a single-pol system based on the operation mode. To achieve a sh…