Citation:
Adamson MF, Morrow IL, James D. (2022) Behaviour of characteristic modes on patch antennas in multilayered media. In: Automated RF (Radio Frequency) and Microwave Society (ARMMS) Conference, Thame, 25-26 April 2022
Abstract:
A design methodology is described supported by Characteristic Mode Analysis (CMA) to enhance the radiation
gain from a patch antenna using multiple dielectric superstrates. Analytic expressions for the radiation field patterns
and impedance match are derived for the patch eigenmodes. An equivalent commercial simulation model is used
to determine the associated characteristic modes. Eigenmode and CMA behaviour are studied as low cost planar
dielectric sheets are stacked above the antenna to affect an increase in the radiated field gain. Numerical results
are compared with laboratory measurements made on several prototype dielectric radome antenna configurations
and demonstrate an impedance bandwidth of 3.6% and radiated field pattern gain of 11.5dBi for a double layer
superstrate antenna.