Browsing by Author "Chang, Kai"
Now showing items 21-40 of 60
-
Liu, Ya-Chi (2014-01-14)In this dissertation, three devices are studied and devised for the applications in microwave and optical communication: (1) Multiband Patch Antenna, (2) Ultra-Wideband Band Pass Ring Filter and (3) Plasmonic Waveguide ...
-
Han, Jeongwoo (Texas A&M University, 2006-08-16)Novel microwave transmitter and receiver circuits have been developed for implementing UWB (Ultra-Wideband) impulse radar imaging sensor operating in frequency band 0.2 to 4 GHz. with tunable operating frequency band. The ...
-
Hsu, Shih-Hsun (2009-05-15)The reflectarray antenna has been considered as a suitable candidate to replace the traditional parabolic reflectors because of its high-gain and low-profile features. Beam scanning capability and multi-band operation are ...
-
Han, Chul Min (Texas A&M University, 2006-10-30)In recent years there has been a growing demand for reduced mass, small launch volume, and, at the same time, high-gain large-aperture antenna systems in modern space-borne applications. This dissertation introduces new ...
-
Chang, Kai; Yun, Tae-yeoul; Tahim, Raghbir S. (United States. Patent and Trademark Office; Texas A&M University. Libraries, 2006-01-17)An apparatus for introducing electromagnetic perturbation into a target device includes a piezoelectric transducer configured to deflect in response to an applied voltage and a perturber configured to deflect in response ...
-
Bhatranand, Apichai (Texas A&M University, 2005-11-01)The use of optical feedback for improving response linearity of electrooptic light modulators has been investigated. The modulator is configured as a straight channel waveguide flanked by electrodes in a lithium niobate ...
-
Yoo, Tae-Whan (Texas A&M University. Libraries, 1993)35 GHz power conversion receivers were developed through theoretical analyses and experiments. The theoretical analyses included the derivation o f a mathematical model for conversion efficiency, the calculation o f diode ...
-
Lee, Jong-Seo (Texas A&M University, 2004-09-30)All-fiber multireflector spectral filters which have potential application in optical communications have been investigated experimentally. These multireflector etalons were produced by aligning equal-length fiber sections ...
-
Al-Khaldi, Mohammad Mazen Mohammad (2017-05-17).An investigation of the design aspects along with proposed improvements in the construction of microwave ablation catheters are reported in this thesis. The computational methods used to carry out this research include ...
-
Karsilayan, Nur (2011-08-08)A new full-wave surface impedance integral equation method is presented for three-dimensional arbitrary-shaped interconnect parasitic extraction in layered media. Various new ways of applying voltage and current excitations ...
-
Song, Xiaomin (2012-02-14)The combination of the arsenic trisulfide (As2S3) waveguide and titanium diffused lithium niobate (Ti:LiNbO3) waveguide provide us compact and versatile means for transmitting and processing optical signals, which benefits ...
-
Yu, Ji Hyoung (2017-12-13)As an indispensable component, microwave bandpass filters play a very important role in many modern wireless systems. They are used to carry out the selection of only the wanted frequencies from RF signals with various ...
-
Mohieldin, Ahmed Nader (Texas A&M University, 2004-09-30)Vast attention has been paid to active continuous-time filters over the years. Thus as the cheap, readily available integrated circuit OpAmps replaced their discrete circuit versions, it became feasible to consider active-RC ...
-
Park, Joung Won (2010-10-12)In this work, a highly linear broadband Low Noise Amplifier (LNA) is presented. The linearity issue in broadband Radio Frequency (RF) front-end is introduced, followed by an analysis of the specifications and requirements ...
-
Tan, Wee Chong (2012-07-16)It is well known that thermally evaporated a-As2S3 thin films are prone to oxidation when exposed to an ambient environment. These As2O3 crystals are a major source of scattering loss in sub-micron optical integrated ...
-
Scher, Aaron David (Texas A&M University, 2005-08-29)In this thesis, two separate research topics are undertaken both in the general area of compact RF/microwave circuit design. The first topic involves characterizing the parasitic effects and error due to unused post-production ...
-
Ren, Yu-Jiun (2009-05-15)In the future, space solar power transmission and wireless power transmission will play an important role in gathering clean and infinite energy from space. The rectenna, i.e., a rectifying circuit combined with an antenna, ...
-
Ahn, Chi Hyung (2011-10-21)In the past decade, artificial materials have attracted considerable attention as potential solutions to meet the demands of modern microwave technology for simultaneously achieving component minimization and higher ...
-
Kwark, Bongsin (Texas A&M University. Libraries, 1993)A new type of photodetector, traveling wave photodetector (TWPD), was designed, fabricated, and tested. In a traveling wave photodetector structure the incident light interacts continuously with the optically generated ...
-
Zepeda, Paola (Texas A&M University, 2004-09-30)The contribution of the work here presented involves three main topics: Wireless Power Transmission (WPT) technology, phased array systems, and microwave components design and modeling. The first topic presents the conceptual ...