求几篇IEEE文献: A dual-frequency series-fed patch array antenna.pdf

Pozar, D.M, "Comparison of three series fed microstrip array geometries", 1993. AP-S. Digest,   
June 28 1993-July 2 1993, Page(s):728 - 731 vol.2, 28 Jun 1993-02

C. Niu, J. She, and Z. Feng, “Design and simulation of linear series-fed
low-sidelobe microstrip antenna array,” in Proc. Asia-Pacific Microwave
Conference APMC 2007, 11–14 Dec. 2007, pp. 1–4.

S. Otto, O. Litschke, J. Lei?, and K. Solbach, “A unit cell based low side
lobe level design for series-fed array,” in Proc. Asia-Pacific Microwave
Conference (APMC), Hong Kong, Dec. 2008, CD-ROM, 2008.

S. Otto, A. Rennings, O. Litschke, and K. Solbach, “A dual-frequency
series-fed patch array antenna,” in 3rd European Conference on Antennas
and Propagation, Berlin, Germany, 3 2009.

谢谢！