Chayono R, Kimura Y, M. Haneishi. Design of stable high-gain multiband circular microstrip antenna. Proc. 2008 Int. Symp. Antennas Propagat. (ISAP). 2008. 453-456
Chayono R, Haneishi M, Kimura Y. Radiation properties of amultiband stacked circular microstrip antenna with 2-D defected groundstructure (DGS). Proc. The 2nd Int. Congress Adv. Electromag. Materials inMicrow. Optics. 2008. 662-664