Browsing by Author "Chang, Kai"
Now showing items 41-60 of 60
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Goldberger, Sean Arthur (2018-05-02)This work investigates an ultra-wideband (UWB), compact, and multilayer Wilkinson power combiners for tightly coupled array (TCA) designs. The Wilkinson topology designs encompass UHF, L-, and S-bands. These combiners ...
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Seo, Sungkyu (2009-05-15)This dissertation contains two different research topics. One is a ‘Nano Scale Device for Plasmonic Nanolithography – Optical Antenna’ and the other is a ‘Nano Scale Device for Rapid Sensing of Bacteria – SEPTIC’. Since ...
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Hu, Jingyu (2005-04-01)This thesis is intended to provide several new bounding techniques for channel codes over quasi-static fading channels (QSFC). This type of channel has drawn more and more attention recently with the demanding need for ...
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Deng, Zhijie (Texas A&M University, 2007-09-17)Optics has the inherent advantages of parallelism and wide bandwidths in processing information. However, the need to interface with electronics creates a bottleneck that eliminates many of these advantages. The proposed ...
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Rodenbeck, Christopher Timothy (Texas A&M University, 2004-11-15)This dissertation introduces new technologies and techniques for low-cost phased arrays and scanning antennas. Special emphasis is placed on new approaches for low-cost millimeter-wave beam control. Several topics are ...
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Fang, Guangyang (2012-07-16)Because the bulk optical properties of dust are largely dependent on their chemical composition, published reports from numerous dust field studies enabled us to compile observation data sets to derive the effective complex ...
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Miller, Jeffrey Allen (Texas A&M University. Libraries, 2000)A full wave analysis of the electromagnetic field in the time-domain derived from R. P. Feynman’s path integral is examined. The propagator, which evolves the fields through successive time steps, comes from a state variable ...
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Chang, Kai; Navarro, Julio A.; Shu, Yong H. (United States. Patent and Trademark Office; Texas A&M University. Libraries, 1992-08-25)Microwave and millmeter-wave system components are fabricated by using slotlines extending from the periphery of CPW resonators. This technique permits the degree of electrical coupling between the CPW and and the slotlines ...
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Kim, Chan Ho (2012-07-16)In modern wireless communication and radar systems, filters play an important role in getting a high-quality signal while rejecting spurious and neighboring unwanted signals. The filters with reconfigurable features, such ...
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Kokel, Samuel John (Texas A&M University, 2006-04-12)This thesis proposes a novel technique using a phase-lock loop (PLL) style phase control loop to achieve retrodirective phased array antenna steering. This novel approach introduces the concept of phase scaling and frequency ...
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Lee, Jungkyu (2012-07-16)The reflectarray has been considered as a suitable candidate to replace the conventional parabolic reflectors because of its high-gain, low profile, and beam reconfiguration capability. Beam scanning capability and multi-band ...
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Ho, Chien-Hsun (Texas A&M University. Libraries, 1994)Slotline and coplanar waveguide (CPW) ring elements have been developed as circuit components for resonator, filter, and coupler applications. Transitions from CPW to slotline and coplanar strip (CPS) using uniform and ...
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Jung, Dong (2010-01-16)This thesis discusses microstrip circuits and components with a slotted area on the ground plane. In recent years, various slot geometries have been placed on the ground plane with the purpose of reducing harmonics, producing ...
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Lewis, Brian Patrick (2011-08-08)Today's microwave circuits, whether for communication, radar, or testing systems, need compact tunable microwave filters. Since different microwave circuit applications have radically different size, power, insertion loss, ...
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Hong, Sung Wook (2009-06-02)Currently, the effect of the vertical resolution on the brightness temperature (BT) has not been examined in depth. The uncertainty of the freezing level (FL) retrieved using two different satellites' data is large. Various ...
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Smith, Christopher Brian (2009-05-15)Due to the recent interest in broadband antennas a microstrip patch antenna was developed to meet the need for a cheap, low profile, broadband antenna. This antenna could be used in a wide range of applications such as in ...
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Hansen, Jonathan Noel (2012-02-14)Microstrip patch antennas are the most common type of printed antenna due to a myriad of advantages which encourage use in a wide range of applications such as: wireless communication, radar, satellites, remote sensing, ...
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Tu, Wen-Hua (2009-05-15)Modern satellite, wireless communications, and radar systems often demand wideband performance for multi-channel and multi-function operations. Among these applications, phased array antennas play an important role. This ...
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Oh, Seong Won (2012-10-19)The reflectarray has been considered as a suitable candidate to replace the conventional parabolic reflectors because of its high-gain, low profile, and beam reconfiguration capability. Narrow bandwidth of the reflectarray ...
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Kim, Sang Gyu (Texas A&M University, 2005-08-29)Modern satellite, wireless communication, and radar systems often demand wideband performance for multi-channel operation and the ability to steer multiple beams for multiple moving targets. This dissertation covers a ...