Folded dipole aerial on Cairn Gorm

There is a weather station on the top of Cairn Gorm that sends information back to Herriot Watt university in Eduinburgh http://cairngormweather.eps.hw.ac.uk/  The aerial is of a type called a folded dipole http://www.antenna-theory.com/antennas/foldeddipole.php The two ends of the dipole are joined electrically to form a complete loop circuit. This gives greater bandwidth. The input impedance is higher. Impedance is a word used instead of resistance for an alternating current circuit. AC can attempt to block current by capacitance or inductance. Neither method is to do with vibrating lattice ions so cannot be called resistance. More work needed on this - I never fully understood it during my degree! The top to bottom measurement on the dipole is half a wavelength. Measured against the person in the photograph I'd say 80cm so one wavelength is 1.6m. That gives 188MHz.