Antenna Design of 60-GHz Micro-Radar System-In-Package for Noncontact Vital Sign Detection

作者：Shen Tze Min^*; Kao Te Yu Jason; Huang Ting Yi; Tu Jianxuan; Lin Jenshan; Wu Ruey Beei

来源：IEEE Antennas and Wireless Propagation Letters, 2012, 11: 1702-1705.

DOI：10.1109/LAWP.2013.2239957

• Antenna arrays
• Doppler radar
• flip chip
• frequency measurement
• medical signal detection
• millimeter-wave radar
• patch antennas

A circularly polarized sequential-rotation 2 x 2 patch antenna array integrated with a 60-GHz Doppler radar system is implemented on the low-temperature co-fired ceramic (LTCC) substrate. The LTCC technology with multiple metal layers is able to satisfy the different dielectric thickness requirements of antennas and microstrip feedlines, and it also provides a compact millimeter-wave packaging option for the CMOS radar chip. Compared to linearly polarized single-patch antenna, the 10-dB bandwidth of the antenna array on LTCC increases from 1.3 (2.4%) to 7 GHz (12.8%) at 55 GHz, and narrow 50-Omega feedline is achieved to realize flip-chip transition. As the modeling and manufacturing variations are often present in the millimeter-wave systems, wide antenna bandwidth is able to cover the possible frequency drift and increase the yield of system-in-package. The circular polarization also provides better isolation against other sensors in multiple radars applications.

• 出版日期2012