Analysis and modeling of nonlinear microwave circuits

Özkan, İbrahim Atak


Analysis and modeling of high power microwave modules
Yapıcı, A. Çağrı; Toker, Canan; Department of Electrical and Electronics Engineering (2004)
A microwave module supplying up-to 1 Watt output power at 2.4-2.5 GHz frequency band was investigated. First the module was operated at low power levels and the output power was predicted using the small signal S-parameters of the module. A method was developed to obtain its large signal model using Advanced Design System (ADS) simulator̕s nonlinear analyses facilities. Later using the large signal model of the module simulations carried out to obtain larger powers up-to 1 Watt. The implementation of the mo...
Analysis and design of wideband antenna arrays
Çapraz, Kenan; Alatan, Lale; Department of Electrical and Electronics Engineering (2014)
Two methods of wideband array design are studied. The aim of this study is to investigate arrays with aperiodic spacings which are designed with these methods in order to obtain wideband behavior. These methods are genetic algorithm and wavelength scaled arrays that have active regions with variable interelement spacings. Genetic algorithm is utilized for array antennas with aperiodic spacing to optimize sidelobe levels of the antenna array in wide frequency band. Wavelength scaled spacing concept in design...
Analysis and modeling of routing and security problems in wireless sensor networks with mathematical programming
İncebacak, Davut; Baykal, Nazife; Bıçakcı, Kemal; Department of Information Systems (2013)
Wireless Sensor Networks (WSNs) are composed of battery powered small sensor nodes with limited processing, memory and energy resources. Self organization property together with infrastructureless characteristics of WSNs make them favorable solutions for many applications. Algorithms and protocols developed for WSNs must consider the characteristics and constraints of WSNs but since battery replenishment is not possible or highly challenging for sensor nodes, one of the major concerns in designing network p...
Analysis and design optimization of three dimensional nozzles
Yildizlar, B.; Eyi, Sinan (2014-01-01)
© 2014 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.The aim of this study is to develop analysis and design optimization method for three dimensional nozzles. For analysis, three dimensional Euler equations are solved using both Newton and Newton-GMRES methods and their performances are compared. The Jacobian matrix needed for Newton method is evaluated analytically. Newton-GMRES method is a matrix free solution technique hence it does not require the Jacobian matrix e...
Analysis and design of cylindrically conformal microstrip antennas
Taşoğlu, Ali Özgür; Dural Ünver, Mevlüde Gülbin; Department of Electrical and Electronics Engineering (2011)
Cylindrically conformal microstrip antennas are investigated. Two different structures, namely proximity coupled and E-shaped microstrip antennas are analyzed and information about the design parameters is obtained by means of parametric study. With these structures, cylindrical arrays, having omnidirectional radiation in the circumferential plane of the cylinder, are designed. Proximity coupled cylindrical arrays operate in the 2.3-2.4 GHz aeronautical telemetry band with approximately 4% bandwidth. On the...
Citation Formats
İ. A. Özkan, “Analysis and modeling of nonlinear microwave circuits,” Middle East Technical University, 1997.