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http://dx.doi.org/10.5515/KJKIEES.2009.20.10.1031

Macro-Micro Reconfigurable Antenna for Multi Mode & Multi Band(MMMB) Communication Systems  

Yeom, In-Su (Graduate School of NID Fusion Technology, Seoul National University of Technology)
Choi, Jung-Han (Digital Media & Communication R&D Center, Samsung Electronics)
Jung, Young-Bae (ETRI)
Kim, Dong-Ho (Graduate School of NID Fusion Technology, Seoul National University of Technology)
Jung, Chang-Won (Graduate School of NID Fusion Technology, Seoul National University of Technology)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.20, no.10, 2009 , pp. 1031-1041 More about this Journal
Abstract
A small microstrip monopole antenna for macro-micro frequency tuning over multiple bands is presented. The meander-shape antenna is fabricated on a conventional printed circuit board(FR-4, $\varepsilon_r=4.4$ and tan $\delta=0.02$). The antenna operates over WiBro(2.3~2.4 GHz) and WLAN a/b(2.4~2.5 GHz/5.15~5.35 GHz) service bands with an essentially constant antenna gain within each service band. Two diodes, a PIN diode and a varactor, are embedded into the antenna for frequency reconfiguration. The PIN diode is used for frequency switching(macro-tuning) between 2 GHz and 5 GHz bands while the varactor is used for frequency tuning(micro-tuning) within the service bands, 2.3~2.5 GHz and 5.15~5.35 GHz. Unwanted resonances between the two frequency bands(2 GHz and 5 GHz) are suppressed by filling up the gaps between the meander lines. The antenna gain is essentially constant and higher than 2 dBi within each service band. The measured performance of the proposed antenna system suggests the macro-micro frequency tuning techniques be useful in reconfigurable wireless communication systems.
Keywords
Reconfigurable Antenna; Macro-Micro Frequency Tuning; Constantgain; PIN Diode; Varactor; Multi-Band;
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