Pavel Smutny is an independent Czech researcher, who has an keen interest in the possibility of very advanced technology existing in the very ancient past. Smutny claims that the layouts of Egyptian temples “to a person familiar with the basics of computer technologies or even better to a person experienced with the construction of microwave circuits in bands above 1 gigahertz (GHz), he will tell you that these plans (of the temples) are schemes of PCB’s (boards for electronic circuits).” (c)
Commenting on the Maltese temples Smutny proposes in his English language book Atlantis Unveiled  and the Academia.edu website(a) that the complexes “were used probably as generators of high frequency acoustic waves. Purpose were (maybe) to arrange a communication channel between various islands.”
Smutny goes further and endeavours to suggest that the round towers of Ireland may have had acoustic and other features as advocated by American professor Phil Callahan, who, after studying a map of Ireland showing the towers he realised that “the towers formed a star map of the northern night sky at the time of the winter solstice.” However he goes further(b), claiming that “Soils around round towers are highly paramagnetic and enjoy great fertility.”
Callahan believes that the Irish towers act as wave-guides or aerials for extra-low-frequency (ELF) radiation from high above Earth (Schumann radiation) and the sun . Vital to our health, ELF waves are able to penetrate water and soil, unlike higher frequencies of radiation. To amplify incoming ELF, towers must be paramagnetic, and the effect is enhanced even more when paramagnetic and diamagnetic (i.e. weakly repelled by a magnet) materials are sandwiched together. Callahan’s theories are more fully explored in his Ancient Mysteries, Modern Vision .