Some results of dipole antenna broadband radiation modelling
DOI:
https://doi.org/10.1109/ICATT.1995.1234113Abstract
The paper presents an analysis of the radiation of dipole antenna excited by polyharmonic signal. It is considered, that relative signal bandwidth defined by:
*
is no less then l (*) and that the first resonant frequency of antenna * is comparable with harmonic component frequencies of exciting signal. It means that *, where fd are fg - the lowest and uppermost component frequencies of signal, respectively.
Antenna is modeled as the cascade of two quadrupoles (fig. 1). One of them represents circuit features of antenna (YA = 1/ZA) and the other represents field features of antenna (ZT). It means that the antenna is analyzed as a spatial- frequency filter.
*
Fig. 1. Equivalent circuit of the dipole antenna
Radiated signals (antenna responses) are computed in time and frequency domains for * = 0 and * = 7 (*, c is the light velocity in vacuum, 2l is the length of dipole antenna), and for several values of τ/T, where τ is the pulse width, T is the signal period.
Method of modelling can be used to describe undesired radiation of desktop equipment.
