You can “download” this material (.pdf-file, 932 kB) here or from the link: http://www.kathrein.de/de/mca/techn-infos/download/basicantenna.pdf
The text focuses on the basic concepts of the electromagnetic field, polarization, radiation pattern, gain, impedance, VSWR, type and design of antennas, etc.
Separate sections describe the features of base station antennas, car and portable antennas. A section is also presented on the methodology for using antennas in mobile communications.
This material is recommended to all radio engineering organizations using KATHREIN-Werke KG products, the study of which will allow you to use antenna equipment more efficiently, taking into account all its many advantages.
Unfortunately, the document is currently only in English.