Wide-Bandwidth V-Band Circularly Polarized IPD Based Quarter-Mode Substrate-Integrated Waveguide Antenna Using Flip Chip Technology

A wide-bandwidth V-band quarter-mode substrate-integrated waveguide (QM-SIW) antenna using integrated passive device (IPD) process and flip-chip technology is proposed in this paper. The proposed antenna mainly comprises of four QM-SIW formed by flip-chip cavity structure surrounded a series-type power divider network to achieve circularly polarized radiation. The cavity size is of 3.2 × 3.2 × 0.1 mm
³
. The proposed antenna is well suited for compact high-integrated millimeter-wave beam forming wireless communication systems.