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%.