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A circularly polarized sequential-rotation 2 × 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- Ω 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.
Published in:
Antennas and Wireless Propagation Letters, IEEE
(Volume:11
)
Date of Publication: 2012
- Page(s):
- 1702 - 1705
- ISSN :
- 1536-1225
- INSPEC Accession Number:
- 13255756
- Digital Object Identifier :
- 10.1109/LAWP.2013.2239957
- Product Type:
- Journals & Magazines
- Date of Publication :
- 21 January 2013
- Date of Current Version :
- 01 February 2013
- Issue Date :
- 2012
- Sponsored by :
- IEEE Antennas and Propagation Society
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