microwave systems

In recent years there was a notable developmental leap in communications systems operating at microwave frequencies. In the dissertation, the goal is to demonstrate the challenges and to propose solutions that enable the successful design and realization of very wide band microwave components, in particular, microwave directional couplers and filters. Directional couplers are an essential part in microwave systems. They are commonly used for dividing or combining signals. For example they are used in the generation of the desired power ...

In this thesis we report on calculations for open quantum mechanical and certain microwave systems. The models refer to a quantum point contact and an electron cavity. We model this open system with an imaginary potential as source and drain, and use the finite difference method to make our calculations. We report on general features of the model we have found, and compare our calculations with measurements made on microwave cavities. Author: Hakanen, Jani Source: Linköping University Download This ...

Ericsson Microwave Systems AB (EMW) in Luleå uses component-based development for their Command and Control systems. The need for a better way of testing these software components led to this master thesis. The goal was to investigate whether there were any existing testing frameworks and/or testing techniques that could be used and if not, create a new framework. To fulfil the goals of this master thesis, requirements were set up which were approved by EMW and an investigation of techniques that ...

The work documented in this thesis has been carried out at Ericsson Microwave Systems AB in Luleå. The company has developed a system for remote support. The system enables personnel working at Ericsson to access equipment at their customers' sites via the Internet or other networks. There are several reasons for providing such a standardized system. For example, if a customer calls Ericsson requesting support for a specific system, setting up a connection ``Ad hoc'' can be very time consuming ...