Browsing by Author "Aksen, Ahmet"
Now showing items 1-20 of 46
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21 st century university internetworking infrastructure
Büyüktopçu, Hakan (Işık Üniversitesi, 2003)In the thesis, we study emerging technologies for a University Campus Internetworking Infrastructure including wireless communication standards. Basicly, Internetworking is a collection of data networking technologies ... -
Cascade synthesis of two-variable lossless two-port networks with lumped elements and transmission lines: a semi-analytic procedure
Aksen, Ahmet; Yarman, Bekir Sıddık Binboğa (Tylor & Francis Ltd, 2001)Two-variable characterization of cascades composed of lossless two-port networks with lumped elements and transmission lines is considered. The problems associated with the construction of scattering functions in two ... -
Circuit model for given reflectance data constructed with mixed lumped and distributed elements for high speed/high frequency communication systems
Yarman, Bekir Sıddık Binboğa; Şengül, Metin; Kılınç, Ali; Aksen, Ahmet (IEEE, 2005)In this paper, a reflectance-based "non linear interpolation method" is presented to model the measured or computed data, obtained from a "passive one-port physical device" using mixed lumped and distributed elements. Mixed ... -
Circuit models with mixed lumped and distributed elements for passive one-port devices
Şengül, Metin (Işık Üniversitesi, 2006-01-23)In this thesis, to model measured data obtained from an actual passive one-port device, a circuit modeling method with mixed lumped and distributed elements is proposed. Namely, measured data is modelled by means of its ... -
Computer aided darlington synthesis of an all purpose immittance function
Aksen, Ahmet; Yarman, Bekir Sıddık Binboğa; Köprü, Ramazan; Kumar, Narendra Senthil; Aydın, Çağatay; Atilla, Doğu Çağdaş; Chacko, Prakash (Istanbul University, 2016)This work is the continuation of our high precision immittance synthesis paper series introduced in IEEE TCAS-I. In the present manuscript, we modified the previously introduced high precision Bandpass LC-ladder synthesis ... -
A computer aided design technique for hybrid and monolithic microwave amplifiers employing distributed equalizers with lumped discontinuities
Aksen, Ahmet; Yarman, Bekir Sıddık Binboğa (IEEE, 2001)This paper will addres the use of mixed lumped and distributed elements in the matching equalizers of microwave amplifers for hybrid and monolithic MIC realizations. In this work we show how the computer aided real frequency ... -
Computer aided high precision Darlington synthesis for real frequency matching
Aksen, Ahmet; Yarman, Bekir Sıddık Binboğa; Köprü, Ramazan; Aydın, Çaǧatay; Atilla, Doğu Çağdaş (Institute of Electrical and Electronics Engineers Inc, 2014)In this work, we introduce a high precision synthesis algorithm to include the extraction of finite frequency and right half plane (RHP) transmission zeros of an impedance function as Brune/Darlington Type-C sections. After ... -
Construction of multivariable broadband matching networks : an integrated design tool
Şimşek, Hayri (Işık Üniversitesi, 2009)One of the major problems in high frequency applications is designing matching circuits. Real frequency design of broadband matching networks is a commonly preferred approach since experimental termination data is directly ... -
Design and implementation of wideband microwave amplifiers based on Normalized Gain Function
Köprü, Ramazan; Kılınç, Sedat; Aksen, Ahmet; Yarman, Bekir Sıddık Binboğa (Institute of Electrical and Electronics Engineers Inc., 2014)In this work, we introduce the design and implementation of wideband microwave amplifiers based on "Normalized Gain Function (NGF)" method. Normalized Gain Function is defined as the ratio of desired shape or frequency ... -
Design and simulation of miniaturized communication systems employing symmetrical lossless two-ports constructed with two kinds of elements
Yarman, Bekir Sıddık Binboğa; Aksen, Ahmet; Çimen, Ebru Gürsu (IEEE, 2003)In this paper, a semi-analytic method is presented to describe symmetrical lossless networks with two-kinds of elements, namely, distributed and lumped elements in cascade connection. in terms of the independently chosen ... -
Design of multiband matching ladders without mutual coupling using parametric representation of Brune functions
Yıldız, Serkan; Aksen, Ahmet; Yarman, Bekir Sıddık Binboğa (John Wiley and Sons Inc, 2020-07-18)In this study, a semianalytical method for the design of mutual coupling free multiband matching networks is introduced. A new parametric representation of Brune functions is used for the construction of multiband ladder ... -
Design of tunable amplifier using digital capacitors
Atilla, Doğu Çağdaş; Aydın, Çaǧatay; Nesimoğlu, Tayfun; Köprü, Ramazan; Aksen, Ahmet; Yarman, Bekir Sıddık Binboğa (IEEE, 2014)In recent days, radio manufacturers are increasingly interested in broadband amplifiers for cellular communication. Demands of customers enforce manufacturers to develop systems compatible for all standards and it is ... -
Doppler radars in avionics systems
Özel, Volkan (Işık Üniversitesi, 2003-08)At the beginning of my thesis I give a brief information about history of Doppler radars. Then I studied the types and working principles of Doppler radars. After that I researched the avionic systems and radar types which ... -
Dual band filter design for GSM bands using frequency mapping and real frequency technique
Yıldız, Serkan; Kılınç, Sedat; Aksen, Ahmet; Yarman, Bekir Sıddık Binboğa (IEEE, 2018)In this study, dual band frequency mapping is incorporated with Real Frequency Technique to design a dual band filter for GSM900 and GSM1800/UMTS bands. The proposed real frequency design technique (RFT) involves a parametric ... -
Dual band filter design using real frequency technique and frequency transformation
Yıldız, Serkan; Aksen, Ahmet; Yarman, Bekir Sıddık Binboğa (Istanbul Univ, Fac Engineering, Elektrik-Elektronik Muhendisligi Bolumu, 2017)In this work, we present a frequency transformation based dual-band filter design approach using scattering based real frequency technique. In the design process, conventional low-pass to band-pass frequency transformation ... -
Dual band matching network design via real frequency technique by mapping from a band pass prototype
Yıldız, Serkan; Aksen, Ahmet; Yarman, Bekir Sıddık Binboğa (IEEE, 2016)In this study, a new method of design for dual band matching network is presented. A transformer-less Band Pass (BP) prototype matching network is synthesized with well-known Simplified Real Frequency Technique (SRFT) via ... -
Dual band stop filter design via frequency transformation and synthesis with lumped resonators
Yıldız, Serkan; Aksen, Ahmet; Kılınç, Sedat; Yarman, Bekir Sıddık Binboğa (Institution of Engineering and Technology, 2020-05-01)This study presents a new compact design technique for dual band stop (DBS) filter. Analytical formulation of DBS frequency transformation/mapping is derived in terms of parametric representation of band characteristic of ... -
A frequency transformation based real frequency design approach for dual-band matching
Aksen, Ahmet; Yıldız, Serkan; Yarman, Bekir Sıddık Binboğa (IEEE, 2017)This work describes a real frequency design approach for dual-band matching networks. The proposed design technique employs a direct low-pass to dual pass band frequency transformation in the scattering based real frequency ... -
A high precision Cascade Synthesis Technique for real frequency matching involving Brune and Darlington Type-C sections
Yarman, Bekir Sıddık Binboğa; Aksen, Ahmet; Köprü, Ramazan; Aydın, Çaǧatay; Atilla, Doğu Çağdaş (IEEE, 2014)In this work, we introduce a high precision cascade synthesis technique for lossless matching networks involving Brune and Darlington Type-C sections. In the present manuscript, we generalized our previously introduced ... -
An immitance based tool for modelling passive one-port devices by means of darlington equivalents
Yarman, Bekir Sıddık Binboğa; Aksen, Ahmet; Kılınç, Ali (Urban & Fischer Verlag, 2001)An immitance-based method is presented to model measured or computed data, obtained from a "passive one-port physical device" by means of its Darlington equivalent. In other words, the given data is modelled as a lossless ...
