Browsing by Author "Khan, Talha Masood"
Now showing items 1-9 of 9
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Area-selective atomic layer deposition of noble metals: polymerized fluorocarbon layers as effective growth inhibitors
(AVS Science and Technology Society, 2021-01-29)The increasingly complex nanoscale three-dimensional and multilayered structures utilized in nanoelectronic, catalytic, and energy conversion/storage devices necessitate novel substrate-selective material deposition ... -
Beam steering in a half-frequency driven airborne CMUT transmitter array
(IEEE Computer Society, 2019)An airborne Capacitive Micromachined Ultrasonic Transducer (CMUT) transmit array was designed using electromechanical modelling for unbiased airborne operation. The array elements are designed for maximum swing at 10V p-p ... -
Design, fabrication and operation of a very high intensity CMUT transmit array for beam steering applications
(Bilkent University, 2020-12)Several studies have reported airborne ultrasound transmission systems focused on achieving beamforming. However, beam steering and beamforming for capacitive micromachined ultrasonic transducers (CMUTs) at high intensity ... -
High-Intensity airborne CMUT transmitter array with beam steering
(IEEE, 2020)A 2×2 high-intensity CMUT transmit array that is capable of two-dimensional beam steering is presented. The device uses an ac drive voltage at half the ultrasound frequency without any dc bias, enabling the usage of the ... -
Optical characterization of high and low resistive silicon samples suitable for reconfigurable antenna design
(Wiley Periodicals, Inc., 2018)Highly resistive (HR) silicon (Si) can behave as a switch when illuminated by optical source of suitable wavelength. Different reconfigurable passive structures, such as filters, waveguides, and antennas, can be constructed ... -
Optically reconfigurable planar monopole antenna for cognitive radio application
(Wiley Periodicals, Inc., 2019)Frequency reconfigurable antenna is one of the important elements needed for cognitive radio application. Such antenna can be designed using highly resistive (HR) silicon (Si) operating as an optical switch. This letter ... -
A performance-enhanced planar Schottky diode for Terahertz applications: an electromagnetic modeling approach
(Cambridge University Press, 2017)In this paper, we present the electromagnetic modeling of a performance-enhanced planar Schottky diode for applications in terahertz (THz) frequencies. We provide a systematic simulation approach for analyzing our Schottky ... -
Terahertz Bandpass Frequency Selective Surfaces on Glass Substrates Using a Wet Micromachining Process
(Springer New York LLC, 2017)This paper presents terahertz (THz) frequency selective surfaces (FSS) implemented on glass substrate using standard microfabrication techniques. These FSS structures are designed for frequencies around 0.8 THz. A fabrication ... -
Tunable Q matching networks for capacitive ultrasound transmitters
(Springer New York LLC, 2021-05-06)Airborne capacitive micromachined ultrasonic transducers (CMUTs) have predominantly large input capacitive reactance with small series radiation resistance. To maximize the acoustic power radiation at resonance we employ ...
