Broadband design on dual and circularly polarized antennas for wireless communication systems

... impedance bandwidth The broadband design of dual and circularly polarized antennas demands precise wideband control of individual orthogonal radiated polarizations Dual linear polarization is attained ... operating bandwidth This thesis presents the broadband design of dual and circularly polarized antennas, and the bandwidth definitions are first established 1....

Ngày tải lên: 02/10/2015, 12:56

... Suggestions for Future Works 141 Bibliography 143 iv Summary This thesis presents the design and analysis of antennas and rectifying circuits for applications in wireless power transmission ... capable of recycling low RF power A new rectenna with broad-band 1×4 quasi-Yagi antenna array and a dualband rectifier is designed to harvest the ambient RF powe...

Ngày tải lên: 09/09/2015, 11:12

... Data Traditional sensor network wireless Attack Data Traditional sensor network wireless or Random Kay Predistribution Data and information spoofing, Attacks in information in Transit Traditional ... sensor network wireless REWARD Blackhole attacks Traditional sensor network wireless Tiny Sec Data and Information spoofing, Message Replay Attack Data and Infor...

Ngày tải lên: 05/03/2014, 23:20

... occurs on the transcriptional or on the translational level, the system of combined transcription translation was decoupled The inuence on the transcriptional level was investigated by in vitro transcription ... dissociation constants were derived for the inhibition of the protein expression by CSP using two models In the most simple model the inhibitio...

Ngày tải lên: 07/03/2014, 21:20

... PUBLICATION Channel- Adaptive Technologies and Cross- Layer Designs for Wireless Systems with Multiple Antennas Channel- Adaptive Technologies and Cross- Layer Designs for Wireless Systems with Multiple Antennas ... with respect to the target channel Channel -Adaptive Technologies and Cross- Layer Designs for Wireless Systems...

Ngày tải lên: 01/06/2014, 07:54

... distribution was calculated for the following four situations: No position correction Daily position correction based on the bone match for both plans Daily position correction based on the tumor ... compared with correction on bony anatomy, correction on tumor position and no position correction Methods Patients and prescribed dose This simulation...

Ngày tải lên: 09/08/2014, 09:20

Ngày tải lên: 26/03/2015, 11:10

... SOME FUNDAMENTAL ISSUES IN RECEIVER DESIGN AND PERFORMANCE ANALYSIS FOR WIRELESS COMMUNICATION WU MINGWEI (B.Eng, M.Eng., National University of Singapore) A THESIS SUBMITTED FOR THE ... Just like in any communication, two fundamental research issues in wireless communication are receiver design and performance analysis The objective of receiv...

Ngày tải lên: 10/09/2015, 15:51

... ITERATIVE RECEIVER DESIGN FOR BROADBAND WIRELESS COMMUNICATION SYSTEMS VIA EXPECTATION MAXIMIZATION (EM) BASED ALGORITHMS THE-HANH PHAM (B Eng., Hanoi ... recommendations for future works Chapter Overview of Expectation Maximization (EM), Expectation Conditional Maximization (ECM) and Space-Alternating Generalized EM (SAGE) Algorithms 2.1 Expectat...

Ngày tải lên: 12/09/2015, 08:19

... Three types of UWB systems are defined in this R&O: imaging systems, communication and measurement systems, and vehicular radar systems Specifically, UWB characterizes transmission systems with ... comparison for communication systems Figure 1.2 FCC regulated spectral mask for UWB indoor communication systems Figure 1.3 Operation distance and data rate of maj...

Ngày tải lên: 04/10/2015, 17:05

... the operation for this inverter have proved its feasibility for dc-ac conversion in wind turbine applications ACKNOWLEDGMENT The authors wish to thank Natural Sciences and Engineering Research Council ... possibility for a low cost and high efficiency dc-ac converter appropriate for small wind turbine applications The inverter has a low component count with only power...

Ngày tải lên: 03/01/2014, 19:16

... where γ operates as z −1 For instance, the γ -transform of u is defined as ∞ u(i) ⊗ γ i , U (γ ) = i=0 1.3 Issues and Problems in Performance Evaluation 31 and Y (γ ) and X (γ ) are defined likewise ... in algebra, probability theory and linear system theory form an ideal background For algebra, [61] for instance provides suitable background material; for probability theory...

Ngày tải lên: 19/02/2014, 03:20

... to data items, and then express the query in a standard language (IL) A translator is written for each data management system in order to rephrase the IL query into the language of the data management ... Distributed Data Management and Computer Networks, May 25-27 1977, Berkeley, CA SECURITY Burger, J., Leal, A., and Shoshanl, A "Semantic Based Parsing and a Natural-L...

Ngày tải lên: 08/03/2014, 18:20

... roles and responsibilities surrounding the operation and management of learning management systems Highlights of Information Management Issues If we examine the materials that a learning management ... interests in the course site that persist beyond the conclusion of the course for a number of reasons The course site may be critically important documen...

Ngày tải lên: 17/03/2014, 20:20

... Switzerland a e-mail: marc-alexandre.dubois@csem.ch; claude.muller@csem.ch C.C Enz and A Kaiser (eds.), MEMS-based Circuits and Systems for Wireless Communication, Integrated Circuits and Systems, ... 333, USA e-mail: piazza@ece.cmu.edu C.C Enz and A Kaiser (eds.), MEMS-based Circuits and Systems for Wireless Communication, Integrated Circuits and Syste...

Ngày tải lên: 30/03/2014, 07:20