Popenko, "UWB
equiangular spiral antenna for 7.540 GHz," Microwave and Optical Technology Letters, vol.
Upon ending the process, this program generates a file with the .IBL extension ready to be imported to a CAD program, said computational code is based on the
equiangular spiral where programming of said codes helps to reduce design time and improve its precision [10], [11].
Scott, "Analysis of the
equiangular spiral antenna on a dielectric substrate," IEEE Trans.
Dispersive or non-dispersive antennas have been commonly used for GPR systems, such as dipole antenna, Bow-tie antenna, TEM horn antenna, Vivaldi or tapered slot antenna (TSA), and
equiangular spiral antenna [2].
Bernoulli was partial to the logarithmic or
equiangular spiral, which spreads out as it travels outward, like a nautilus shell.
LAC comprises Euler spiral ([alpha] = -1), Nielsen spiral ([alpha] = 0), logarithmic or
equiangular spiral ([alpha] = 1), circle involute ([alpha] = 2), and others.
From a theoretical point of view (Maxwell's equations), the planar
equiangular spiral antenna is one of the simplest types of wideband planar antennas.
The authors propose to insert two layers of artificial materials, generated by particle swarm optimization, between an
equiangular spiral antenna and the ground, in order to achieve both directional radiation pattern and high gain.