A 60-GHz Wideband Slot Antenna Based on Substrate Integrated Waveguide Cavity
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A 60-GHz Wideband Slot Antenna Based on Substrate Integrated Waveguide Cavity Xiao-Jun Tang & Shao-qiu Xiao & Bing-Zhong Wang & Jianpeng Wang
Received: 27 January 2007 / Accepted: 8 February 2007 / Published online: 22 February 2007 # Springer Science + Business Media, LLC 2007
Abstract This paper proposes a new wideband W-band substrate integrated waveguide (SIW) cavity-backed slot (CBS) antenna. The SIW cavity suppresses the backward radiation and ensures this antenna have a very low profile (only about 4% of the operating wavelength). Several techniques, such as slot resonator with semicircular end, quarterwavelength microstrip resonator, are introduced to improve impedance matching. The studied results demonstrate that this antenna has wide operating bandwidth in 54.3–67 GHz (about 20.9% of the fractional bandwidth), unidirectional radiation pattern and good linear polarization characteristic. These properties are very suitable for RF front-end systemon-package (SoP) design in millimeter wave wireless communication systems. Keywords Cavity-backed slot antenna . Substrate integrated waveguide cavity . Millimeter wave . Wideband
1 Introduction Nowadays, the demand for higher data rate (Gb/s) wireless communication systems motivates the usage of millimeter wave frequency bands (e.g., 57–64 GHz in U.S.A., 59–66 GHz in Japan) having multiple of GHz bandwidth available, and lots of millimeter wave circuits and systems have been presented and studied. Both the commercial and military applications require these millimeter wave circuits and systems to be small size, low profile, light-weight, low fabrication cost, and high level integration. Recently, the technology of system-on-package (SoP) is developed. In SoP application, it is desired to integrate antenna with RF circuits and
This work was supported by the National Nature Science Foundation of China (60501011, 90505001), the Specialized Research Fund for the Doctoral Program of Higher Education of China (No. 20060614005) and the Creative Research Team Program of UESTC.
X.-J. Tang : S.-q. Xiao (*) : B.-Z. Wang : J. Wang Institute of Applied Physics, University of Electronic Science and Technology of China, Chengdu 610054, People’s Republic of China e-mail: [email protected]
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Int J Infrared Milli Waves (2007) 28:275–281
Fig. 1 The configuration of the proposed SIW cavity-backed slot antenna.
Int J Infrared Milli Waves (2007) 28:275–281 Fig. 2 The return loss of the CBS antenna proposed in [4].
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systems together. Therefore, an integrated antenna scheme, which has a compact size, simple fabrication process and ease of integration with RF front end circuits, is required. Microstrip antennas are used widely in millimeter wave systems because of its light weight, small volume, low profile, low cost, ease of integration with active circuits. However, microstrip antenna has a main disadvantage of narrow bandwidth especially in low profile case. This trai
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