Chang, Kai. Microwave ring circuits and related structures Kai Chang, Lung-Hwa Hsieh. - 2nd ed. - Hoboken, N.J. : J. Wiley, c2004. - xii, 365 p. : ill. ; 25 cm. - Wiley series in microwave and optical engineering . ISBN: 047144474X Subjects--Topical Terms: Microwave circuits.Microwave antennas. Dewey Class. No.: 621.38132