Antennaperformanceisfundamentallyafunctionofsizemeasuredinwavelengthsattheoperatingfrequency.“Electricallysmall”antennasarethosethataresmallcomparedtothewavelength,notnecessarilysmallcomparedtothepeoplewhousethem.ThewavelengthatthemiddleoftheAMbroadcastbandis300m,soatower30mtall