Methods of adjusting frequency ratio of a dual-band slot antenna with double t-match stubs

In Y. C. Lin and K. J. Hung (2006), a simple and compact dual-band slot antenna is proposed to reduce the antenna size while keeping the broadband feature for both operational bands. Using the broadband T-match techniques (Balanis, 2005) combined with the design of dual resonant paths, double T-match stubs are employed in Y. C. Lin and K. J. Hung (2006) to realize the broad dual-band operation. Furthermore, in this paper, an extended study on how to adjust the frequency ratio of the antenna is investigated and discussed.