Quarter-wave patch antenna based on BCB polymer for sensor network applications

This paper presents a design, fabrication and characterization of a 60 GHz lambda/4-patch antenna compatible with a benzeocyclobutene polymer packaging. The patch and ground plane size are adjusted to reduce the antenna size for matching to the package size. The designed size was 2 times 2 times 0.05 mm³. Using electromagnetic simulation, the proposed antenna was optimized by investigating the resonance characteristic and radiation pattern depending on the distance between patch and ground plane and the separation between shorting-pin and feed line. The prototype square patch antenna is manufactured on pyrex glass #7740 and shows a return loss of 30 dB at 65 GHz.