Ultra Wideband Ring Monopole Miniaturization Using Dielectric Loading Sandwich
Moreira, A. A.
Ultra Wideband Ring Monopole Miniaturization Using Dielectric Loading Sandwich, Proc International Workshop on Antenna Technology - IWAT, Santa Monica, United States, Vol. 1, pp. 1 - 4, March, 2009.
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A simple miniaturization technique using dielectric loading was applied to the design of Ultra Wideband (UWB) microstrip fed ring monopoles. The method consists of gluing a commercially available substrate layer to each metallization side. Two antenna prototypes were built and tested to validate the concept. The larger prototype covers the whole UWB bandwidth with |S11| < -10dB. The smaller has considerable reduced size, making it suitable for use in a Universal Serial Bus (USB) dongle. The larger structure was further investigated by testing the influence of a close metallic box on antenna matching.