<p>During the work at Gateway Security AB in Motala I began examining available antenna models to get a wider perspective, this have given knowledge of their structure, and an understanding of their function. All my necessary fact is based on my observations and notes of these measurings. </p><p>New antenna models, and available models were examined where measurements at different heights and different distances on the antenna were performed with the help of an oscilloscope and a measure probe, peak – to - peak was brought on the signal. The measurements are presented in a line diagram. </p><p>Further development of simulating tool for antenna designs have been made. Calculations of electromagnetic fields from the antenna take place in the simulation programme Wire-MoM, where the antenna is fed in as a thread structure. I used the data from this programme to present the appearance graphical in 2-dimension in Matlab. Further development represents an improvement of the result presentation management of the simulating tool. </p><p>The results are presented graphical and show the fields at a height of for example 1 meter. Conclusions where taken on the basis of comparison of my results from all the measurements and the graphical image.</p>

During the work at Gateway Security AB in Motala I began examining available antenna models to get a wider perspective, this have given knowledge of their structure, and an understanding of their function. All my necessary fact is based on my observations and notes of these measurings. New antenna models, and available models were examined where measurements at different heights and different distances on the antenna were performed with the help of an oscilloscope and a measure probe, peak – to - peak was brought on the signal. The measurements are presented in a line diagram. Further development of simulating tool for antenna designs have been made. Calculations of electromagnetic fields from the antenna take place in the simulation programme Wire-MoM, where the antenna is fed in as a thread structure. I used the data from this programme to present the appearance graphical in 2-dimension in Matlab. Further development represents an improvement of the result presentation management of the simulating tool. The results are presented graphical and show the fields at a height of for example 1 meter. Conclusions where taken on the basis of comparison of my results from all the measurements and the graphical image.