Cost-effective 60-GHz surface-mount antenna-package for wireless file-transfer system

A cost-effective surface-mount antenna-package suitable for the mobile terminal of the wireless file-transfer system was fabricated. The package has two post-wall waveguide aperture antennas with the end-fire radiation. The package has the size of 14.4 mm × 14.4 mm × 1.0 mm. The isolation between Tx and Rx antenna was measured to be less than -36.2 dB in the frequency range of 59 - 66 GHz. The measured |S21| from the GSG pad on the package to one on the printed circuit board (PCB) were -0.23 dB for IF of 2-GHz and -1.5 dB for external 20-GHz local signal. The measured |S11| were less than -10 dB for both IF and 20-GHz. The repeatability of the ball grid array (BGA) assembly was also confirmed by the small measurement variation.