Popenko, "UWB equiangular spiral antenna for 7.540 GHz," Microwave and Optical Technology Letters, vol.
Ghorbani, "A planar dual-arm equiangular spiral antenna," IEEE Transactions on Antennas and Propagation, vol.
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
An example for such a case is that shown in Figure 3 for a triangular patch model of a two-arm planar equiangular spiral antenna
. A zoom-in view focused on the central part of the antenna is presented in Figure 4(a).
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.
[40.] Dyson, J., "The equiangular spiral antenna
," IRE Trans.
Yamauchi, "Equiangular spiral antenna
backed by a shallow cavity with absorbing strips," IEEE Transactions on Antennas and Propagation, vol.
To offer an easy method for designing and optimizing low-profile CP directional antennas, we proposed a universal scheme along with a discrete meshing optimization method to generate two optimized 2D parasitic layers, which acts as a metamaterial between the existed equiangular spiral antenna and the ground plane to achieve good radiation performance.
We take an equiangular spiral antenna as an example to make this process more detailed.
Common external antennas include Archimedes and planar equiangular spiral antennas