Title :
Frequency Reconfigurable and Miniaturized Substrate Integrated Waveguide Interdigital Capacitor (SIW-IDC) Antenna
Author :
Somarith, Sam ; Hyunseong Kang ; Sungjoon Lim
Author_Institution :
Sch. of Electr. & Electron. Eng., Chung-Ang Univ., Seoul, South Korea
Abstract :
A novel frequency reconfigurable substrate integrated waveguide-interdigital capacitor (SIW-IDC) antenna is presented. The antenna is designed based on a composite right/left-handed (CRLH) resonator, which is realized by the SIW-IDC. Thanks to CRLH characteristics, the antenna size is reduced. Since the IDC determines the resonant frequency, a varactor diode is embedded on the interdigital slot of the short-ended SIW. Its zeroth-order resonance (ZOR) frequency is varied from 4.13 GHz to 4.50 GHz by changing the bias voltage from 0 V to 36 V while keeping good impedance matching better than 15 dB. The radiation performance is numerically and experimentally investigated. Very good agreements between the simulated and measured S-parameters and radiation patterns are observed.
Keywords :
antenna radiation patterns; capacitors; impedance matching; microwave antennas; substrate integrated waveguides; waveguide antennas; CRLH characteristics; CRLH resonator; IDC; S-parameters; SIW-IDC antenna; ZOR frequency; composite right-left handed resonator; frequency 4.13 GHz to 4.5 GHz; frequency reconfigurable substrate integrated waveguide interdigital capacitor; impedance matching; interdigital slot; miniaturized substrate integrated waveguide interdigital capacitor antenna; radiation patterns; radiation performance; short-ended SIW; varactor diode; zeroth-order resonance; Antenna measurements; Capacitance; Dipole antennas; Resonant frequency; Varactors; Composite right/left-handed (CRLH); frequency reconfigurable antenna; interdigital capacitor (IDC); substrate integrated waveguide (SIW); zeroth-order resonance (ZOR);
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2013.2281662
