Fujimoto Kyohei, Hiroi Yoshiyasu: Folded integrated antenna and amplifier. Matsushita Electric Industrial, November 23, 1971: US3622890 (81 worldwide citation)

An integrated antenna system comprising a ground plane, at least one vertical element substantially perpendicular to the ground plane, a helically shaped element having horizontal polarization and a solid state circuit located at the junction of the horizontal and vertical elements. The described an ...