A New approach for distributed amplifier design

Yılmaz, İsmail Gökhan
In this thesis work, a new distributed amplifier topology is discussed and applied to three different cases. The topology is based on dividing the frequency spectrum into channels and amplifying afterwards. The channelized and amplified signals are then combined at the output for broadband amplification. This topology is used in the design of a three channel 0.1-1 GHz amplifier with a gain of 14.5±0.6 dB. The design is fabricated, and then the measured and simulated results are compared. A second 0.1-1 GHz amplifier with 21±1 dB is designed in simulation environment with five channels. This five channel amplifier is fabricated and measured results are compared with the simulated ones. A 1-6 GHz three channel amplifier is also designed with a gain of 10.5±0.5 dB. Application of the proposed topology to three different designs shows promising results for future amplifier designs.


Özgüven, Hasan Nevzat (Elsevier BV, 1987-09-08)
A method of calculating the receptances of a non-proportionally damped structure from the undamped modal data and the damping matrix of the system is presented. The method developed is an exact method. It gives exact results when exact undamped receptances are employed in the computation. Inaccuracies are due to the truncations made in the calculation of undamped receptances. Numerical examples, demonstrating the accuracy and speed of the method when truncated receptance series are used are also presented. ...
Novel SIE Implementations for Efficient and Accurate Electromagnetic Simulations of Zero-index Materials
Ibili, H.; Koyaz, Y.; Ozmu, U.; Karaosmanoglu, B.; Ergül, Özgür Salih (2019-01-01)
We present novel surface-integral-equation formulations for efficient and accurate iterative solutions of electromagnetic problems involving zero-index (ZI) and near-zero-index (NZI) materials. When applied to materials with small permittivity and/or permeability values, conventional implementations employing traditional formulations tend to become inefficient, inaccurate, or both. Such numerical issues arise mainly due to low-frequency breakdowns related to inner problems, as well as due to deteriorating b...
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Bostan-Korpeoglu, B; Yazıcı, Adnan (2004-01-01)
We use a Fuzzy Petri Net (FPN) structure to represent knowledge and model the behavior in our intelligent object-oriented database environment, which integrates fuzzy, active and deductive rules with database objects. However, the behavior of a system can be unpredictable due to the rules triggering or untriggering each other (non-termination). Intermediate and final database states may also differ according to the order of rule executions (non-confluence). In order to foresee and solve problematic behavior...
Design and implementation of microwave lumped components and system integration using MEMS technology
Temoçin, Engin Ufuk; Akın, Tayfun; Department of Electrical and Electronics Engineering (2006)
This thesis presents the design and fabrication of coplanar waveguide to microstrip transitions and planar spiral inductors, and the design of metal-insulator-metal capacitors, a planar band-pass, and a low-pass filter structures as an application for the inductors and capacitors using the RF MEMS technology. This thesis also includes a packaging method for RF MEMS devices with the use of “benzocyclobutene” as bonding material. The transition structures are formed by four different methods between coplanar ...
An efficient transitive closure algorithm for distributed databases
Toroslu, İsmail Hakkı (1993-01-01)
© 1993 IEEE.Because most of the recognizable queries in deductive databases can be transformed into transitive-closure (TC) problem, the development of efficient algorithms to process the different forms of TC problems within the context of large database systems has recently attracted a large amount of research efforts. However, the parallelization of the computation of TC is still a new issue and there are only a few and recent parallel TC algorithms. Most of these parallel algorithms mere developed for s...
Citation Formats
İ. G. Yılmaz, “A New approach for distributed amplifier design,” M.S. - Master of Science, Middle East Technical University, 2012.