Print a Compact Single- and Quad-Band Slot Antenna on Ceramic Substrate

C.-F. Yang Department of Chemical and Materials Engineering, National University of Kaohsiung, Kaohsiung, Taiwan;, Email: [email protected]

M. Cheung Department of Media and Communication, City University of Hong Kong, Hong Kong, China

C.-Y. Huang Department of Electronic Engineering, National Kaohsiung Normal University, Kaohsiung, Taiwan

J.-S. Sun Department of Electronic Engineering and Graduate Institute of Computer and Communication Engineering, National Taipei University of Technology, Taiwan

Abstract

A miniaturized slot antenna is designed on the 0.4 mm-thickness Al₂O₃ ceramic substrate with ground plane size of 30 mm × 30 mm and the printed method is used to get the designed patterns. Two different strip insets, U-shape and N-shape, are added in the slot to improve the characteristics of microstrip fed antennas. When a symmetrical U-shaped strip inset is added in the slot, the fabricated antenna reveals a single-band characteristic and has a relatively large return loss of –28.0 dB at 3.12 GHz and a wide –10 dB impendence bandwidth of 8.9% (275 MHz). When an un-symmetrical N-shaped strip inset is added, the antenna reveals the quad-band characteristics with the resonant frequencies at 2.22 GHz, 3.23 GHz, 4.63 GHz, and 5.42 GHz, respectively. The gains and far-field radiation patterns of the N-shaped antenna are also developed in this study.

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Print a Compact Single- and Quad-Band Slot Antenna on Ceramic Substrate

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Print a Compact Single- and Quad-Band Slot Antenna on Ceramic Substrate

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