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Despite decades of scientists' effort, absolute phase determination of interferometry synthetic aperture radar (InSAR) image still remains unsolved. InSAR measurement derived from phase data is not only ambiguous by its modulo-2pi mathematical-ill pose, but also further corrupted by noise. Therefore, we suggest an adaptive least mean square (LMS) algorithm based on steepest descent method for noise...
Continuous monitoring of ground deformation on high-risk areas is of great importance for the study of landslide mechanisms as well as to serve as an early warning system before the triggers of hazardous events. A new ground-based synthetic aperture radar (GBSAR) has been developed and installed at selected landslide-prone areas in Malaysia. The proposed system operates at 17.2 GHz with high resolution...
Contactor pin is commonly used as the test tooling to enable million times of repeatability functional testing in manufacturing. Simulation should be performed before contactor sent for prototyping. The objective is to optimize the design according to device performance and avoid design faulty which may lead to higher testing cost. This paper introduces the methodology on contactor pin characterization...
The design and development of Synthetic Aperture Radar (SAR) is one of the focused research areas in Malaysia since early 2000s. The main objective of this research is to develop an all-weather instrument for earth resource monitoring in Malaysia. The first SAR sensor developed was a C-band (5.3 GHz) SAR mounted on a small unmanned aerial vehicle (UAV) [1]. In 2013, a new SAR sensor operating at S-band...
Hazards involving ground movements and instabilities such as landslides, falling rocks or earth-falls can lead to considerable human and economic losses. Continuous monitoring of such regions can give insight into mechanisms and triggers of hazardous events. This paper discusses the design and development of a ground-based millimetre-wave Synthetic Aperture Radar (SAR) for land deformation monitoring...
A novel dual band antenna for Wireless Local Area Network (WLAN) applications is presented. The dual band characteristic is achieved by feeding two different length resonant paths with a 50 Ω microstrip line. The compact antenna only occupies 5.3 × 16 mm2 and promotes wideband characteristic. The bandwidth for lower resonance spans from 2.03 GHz to 2.80 GHz (30.3%) and 4.86 GHz to 6.44 GHz (31.6%)...
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