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http://dx.doi.org/10.5515/KJKIEES.2014.25.1.10

Dual-Band Frequency Reconfigurable Small Eighth-Mode Substrate-Integrated Waveguide Antenna  

Kang, Hyunseong (School of Electrical and Electronics Engineering, Chung-Ang University)
Lim, Sungjoon (School of Electrical and Electronics Engineering, Chung-Ang University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.25, no.1, 2014 , pp. 10-18 More about this Journal
Abstract
In this paper, we propose a new frequency reconfigurable dual-band antenna. By using an electronically compact eighth-mode substrate-integrated-waveguide(EMSIW) resonator, we have designed a compact antenna, which performs dual-band movement by additionally loading a complementary split ring resonator(CSRR) structure. The EMSIW and CSRR structures are designed to satisfy the bandwidths of 1.575 GHz(GPS) and 2.4 GHz(WLAN), respectively. We load the CSRR with a varactor diode to allow a narrow bandwidth and to enable the resonance frequency to continuously vary from 2.4 GHz to 2.5 GHz. Thus, we realize a channel selection function that is used in the WLAN standards. Irrespective of how a varactor diode moves, the EMSIW independently resonates so that the antenna maintains a fixed frequency of the GPS bandwidth even at different voltages. Consequently, as the DC bias voltage changes from 11.4 V to 30 V, the resonance frequency of the WLAN bandwidth continuously changes between 2.38 GHz and 2.5 GHz, when the DC bias voltage changes from 11.4 V to 30 V. We observe that the simulated and the measured S-parameter values and radiation patterns are in good agreement with each other.
Keywords
Frequency Reconfigurable Antenna; Dual-Band Antenna; Complementary Split Ring Resonator(CSRR); Substrate Integrated Waveguide; Electrically Small Antenna;
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