Konzepte zur Trennung und Winkelmessung mehrerer HF-Transponder

Many Systems, in both at private or commercial environment, use auto- nomic working equipment for efficiency and simplification reasons. To ensure reliable work, it is essential that this equipment always knows its exact posi- tion. If there is more than one device, it is very important that each device’s posi- tion is known. To solve this problem, modulated signals were used to seperate the different transponders. This way, it is possible to have a couple of devices without loosing a single transponder’s identity. One of the most important criteria in RF-Systems is how much bandwith is used. In most localization problems frequency sweeps are used, but with the disadvantage of needing bandwith. To avoid this problem, only a small bandwith around the center frequecy is required in this diploma work. Another advantage is the use of microwaves around 6 GHz. Unlike light waves, which are affected by their environment, microwaves are largely independent on their environment.