Shoichi Kumagai, Yasuhiro Kazama, Naohisa Goto. Dual-Frequency Ring Patch Antennas for GPS. In Proceedings of the 2nd IEEE International Symposium on Wireless Communication Systems, ISWCS 2005, Siena, Italy, 5-7 September 2005. pages 601-605, IEEE, 2005. [doi]
Abstract is missing.