Ten Fundamental Antenna-Theory Puzzles Solved by the Antenna Equation: A remarkable array of solutions

Describing the performance of antennas in the time domain has long been problematic. No standard definitions exist, for example, in the IEEE Standard Definitions of Terms for Antennas [1]. This makes it difficult for ultrawideband (UWB) antenna manufacturers to compare their antennas to each other. This contrasts sharply with the situation in the frequency domain, where one commonly uses gain or realized gain, as defined in [1]. With no accepted standards, UWB antenna development is hindered. To address this, the antenna equation has recently been developed. However, for it to become widely adopted, more examples of its usefulness are needed.