180-GHz Broadside Radiation Bond-Wire Antenna for Short-Range Wireless Communication

A technique for realizing an efficient broadside radiation bond-wire antenna for short-range wireless communication is demonstrated. The bond wire forming the antenna is located around
$375~\mu \text{m}$
(
$\sim \lambda $
/4 at 180 GHz) above the ground plane on a printed circuit board (PCB) for constructive interference of reflected waves from the PCB and that radiated from the antenna. At 178.3 GHz, a gold bond wire shaped in a half loop and terminated on a bond pad of a neighboring chip 975-
$\mu \text{m}$
away exhibits a measured peak gain of 2.5 dB at the
$\phi = 90^{\circ }$
plane. The antenna also exhibits >20 GHz measured −10-dB
$\vert \text{S}_{11}\vert $
bandwidth. The simulated efficiency is 52%.