Yansıtmalı Dizi Antenlerin Nümerik Çözümü için Verimli Bir Yöntem


Efficient numerical analysis and design of reflectarray antennas
Erçil, Erdinç; Aydın Çivi, Hatice Özlem; Alatan, Lale; Department of Electrical and Electronics Engineering (2015)
The accurate numerical analysis of electrically large reflectarray antennas has been a challenging task since their advent because it becomes impractical to employ the generalized numerical electromagnetic tools for their numerical analysis. Therefore the classical approach is to resort to approximate methods. However, approximate methods trade off accuracy against memory and speed. In this thesis study; an approximate analysis technique is established such that it is more accurate than the present approxim...
The Relationship between teacher reflection and teacher autonomy with respect to certain variables
İpek Şahin, Derya; Aksu, Meral; Department of Curriculum and Instruction (2017)
This study aims to investigate whether there is a significant relationship between teacher reflection and teacher autonomy and among their subscales; and whether there is a significant difference in teacher reflection and teacher autonomy scores according to gender and years of teaching experience. The sample of the study, which is determined by means of cluster random sampling, is 284 classroom teachers (1-4 grades) in 15 elementary schools in three districts (Yenimahalle, Altındağ, Keçiören) of Ankara in ...
Developing reflective teachers : a study on perception and improvement of reflection in pre-service teacher education ping program and testing its effectiveness
Erginel, Senem Şanal; Yıldırım, Ali; Department of Educational Sciences (2006)
This study is a detailed examination of reflection in pre-service teacher education. It focuses on the process of the promotion of reflective teacher education. Within this process, it considers pre-service teachers' perceptions on becoming reflective and their focus of attention throughout their practicum. In relation to these, it analyzes pre-service teachers' improvement in reflection by focusing on various methods of promotion for reflectivity.
Design and implementation of reflectionless filters
Çubukcu, Ali İhsan; Günalp, Nilgün; Yıldırım, Nevzat; Department of Electrical and Electronics Engineering (2016)
In this thesis, typical applications of absorptive filters are examined. To better understand the effect of out of band matching of RF and microwave filters on overall system, some experiment setupsare constructed and simulations are performed. In addition to this, three types of conventional absorptive filter topologies are analyzed and the realizability of each type is shown by explanation, simulation or measurement. Finally, a recently found method, reflectionless filter structures by Matthew Morgan, is ...
Design and implementation of L1 C/A GPS transmitter for spoofing applications
Tunçyürek, Yunus Emre; Demir, Şimşek; Department of Electrical and Electronics Engineering (2022-12-01)
GPS is one of the main positioning services used in both military and civilian applications. It is possible to design a custom GPS Transmitter by using the SDR platform and periodically published Orbital Parameters. The realization of such a system brings spoofing threats for GPS Receivers. In this thesis, the baseband GPS signals are created by considering the pseudoranges and Doppler Frequencies for the specific user position with respect to the satellite positions whose orbital parameters are open to acc...
Citation Formats
E. Erçil, L. Alatan, and H. Ö. Aydın Çivi, “Yansıtmalı Dizi Antenlerin Nümerik Çözümü için Verimli Bir Yöntem,” 2016, Accessed: 00, 2021. [Online]. Available: http://ursi.org.tr/2016-Kongre/WEB%20SAYFASI/URSITR2016_Program_Detay_FINAL.htm.