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Innovative UWB phase shifters using groove gap-waveguide technology inspired by metasurfaces for beamforming networks operating at 100 GHz
Published 2025“…The metasurface features a "bed-of-nails" structure, where metal pins are connected to a bottom layer and spaced <λ/4 from a top plate. …”
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Metamaterial based ultra-wideband antennas for portable wireless applications
Published 2017“…Various approaches have been reported to reduce the physical size of RF antennas including using high permittivity substrates, shorting pins, reactive components, and more recently, metamaterials (MTM) based on composite right-/left-handed transmission-lines (CRLH-TLs). …”
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Biomechanical evaluation and new improvement on ankle external fixator
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Development of coated peanut separator and frying skillet machine
Published 2018“…The groundnut is sticking and become like a ping pong size ball and the time consuming to fry is longer. …”
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The potential of effective microorganism (EM) inclusion in enhancing the properties of cement paste and concrete
Published 2019“…Furthermore, the high compressive strength and low porosity also leading to improve the internal densification of cement matrix which reported the formation of calcium silicate hydrate (CSH) and ettringite by detecting from formation of bundle shape and needles like pine leaves, acicular, thin, narrow and pointed shape, respectively at later age of 28 days and 60 days using scanning electron microscopy (SEM). …”
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Prediction of sedimentation and bank erosion due to the construction of Kahang Dam
Published 2020“…This research used the Artificial Neural Network (ANN) and ANN with Autoregressive (AR) (NNETAR) in predicting suspended sediment concentration using sediment concentration, discharge and water level as inputs. Similarly, erosion pins were installed on four transects to monitor the riverbank for thirteen months. …”
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Untitled (Publicity notice board)
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Development of switchable planar reflectors for beam shaping realization
Published 2016“…Higher tunable loss factor of 1.91dB was demonstrated by liquid crystal based design as compared to tunable loss factor of 1.43dB shown by PIN diode based design. The investigations were further extended by carrying out equivalent circuit analysis of PIN diode based and liquid crystal based designs for detailed characterization of reconfigurable planar reflector designs. …”
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Multi-Mode Yagi Uda Patch Array Antenna With Non-Linear Inter-Parasitic Element Spacing
Published 2023“…Applying the inter-parasitic element spacing’s optimization and minimizing the switching circuitry using four RF PIN diodes on the parasitic elements have contributed to the gain achievement of more than 7 dBi.…”
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