“…In 1985, the 2.92-mm "K" connector was introduced by Bill Oldfield of Wi lt ron [16] to exte nd coverage to 40 GHz and mates with 3.5-mm connectors. Not to be outdone, Julius Botka of Hewlett-Packard introduced the 2.4-mm connector [17]. The key patent for the 2.4-mm connector described the details of the slotless female and male pin connection and is shown Figure 4.…”