Title :
Electrically Tunable Evanescent Mode Half-Mode Substrate-Integrated-Waveguide Resonators
Author :
Senior, David E. ; Cheng, Xiaoyu ; Yoon, Yong-Kyu
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Florida, Gainesville, FL, USA
fDate :
3/1/2012 12:00:00 AM
Abstract :
Electrically tunable evanescent mode half mode substrate integrated waveguide (HMSIW) resonators are implemented for S band applications. An HMSIW loaded with a complementary split ring resonator (CSRR) achieves forward electromagnetic wave transmission below the characteristic waveguide cutoff frequency due to evanescent wave amplification. A variable capacitor connected to one of the conductors of the CSRR changes its effective capacitance to ground, resulting in frequency tuning of the resonator. Three different configurations are investigated with a varactor diode connected between the ground and three different contact points of the CSRR. The external Q factor is slightly affected by the frequency tuning. More than 15% tunability is achieved around 3.4 GHz. Full wave structure simulation results are in good agreement with those of measurement.
Keywords :
electromagnetic wave transmission; microwave resonators; substrate integrated waveguides; varactors; S band application; characteristic waveguide cutoff frequency; complementary split ring resonator; electrically tunable evanescent mode; evanescent wave amplification; forward electromagnetic wave transmission; frequency tuning; half-mode substrate integrated waveguide resonator; varactor diode; variable capacitor; Capacitance; Conductors; Cutoff frequency; Q factor; Resonant frequency; Substrates; Varactors; Complementary split ring resonator (CSRR); half mode substrate integrated waveguide (HMSIW); tunable resonator; varactor diode;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2012.2183860