Scientific Conferences of Ukraine, ICATT’95 - I International Conference on Antenna Theory and Techniques

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Some results of dipole antenna broadband radiation modelling
W. Aloksa, Ireneusz Kubiak

Last modified: 2014-09-24


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.

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