What is Antenna Factor?
I still remember the day when there was no internet or Google and I was searching antenna books to find the definition of the term “antenna factor”. The term was commonly used by all EMC engineers during radiated emissions testing, but then, they were not called EMC engineers, but referred to as RFI or EMI engineers. Even today, the subject of “Antenna Factor” is not commonly discussed in antenna theory or antenna design books. However, in the world of EMI or EMC testing (often called “EMI-EMC” testing), the concept of antenna factors is used as commonly as the antennas themselves. However, quite often, the concept of antenna factor is used without fully understanding its meaning, its limitations, the reasoning or the complexity behind this simple idea.
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