Practical aspects of the direction finding accuracy of compact wideband arrays for V/UHF frequencies

The paper discusses some advanced topics of direction finding (DF) of communication signals and respective antenna arrays in the frequency range from 20 to 3000 MHz. There are a number of issues contributing to potentially severe performance degradation of an installed system in its typical operational environment compared to the same system operated under the well-defined test conditions on an antenna test site. It is shown that especially polarization aspects deserve more attention than traditionally paid.