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Patch-antenna miniaturization using recently available ceramic substrates

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6 Author(s)
J. S. Kula ; Dept. of Electr. & Comput. Eng., Ohio State Univ., Columbus, OH ; D. Psychoudakis ; W. -j. Liao ; C. -c. Chen
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The recent availability of high-contrast, low-loss ceramic materials provides us with possibilities for significant antenna miniaturization. This paper explores the use of low-temperature co-fired-ceramic (LTCC) substrates in producing a miniaturized patch-antenna design. Of particular interest in the design are parameters such as substrate thickness, input impedance, radiation efficiency, and bandwidth due to the high-contrast ceramic. We propose a thick substrate to increase bandwidth. However, the substrate is truncated to mitigate surface-wave loss, with possible texture to provide dielectric-constant control for improved impedance matching. Utilizing these proposed design modifications, a miniaturization factor of more than eight was achieved, with a return-loss half-power bandwidth greater than 9%. Moreover, respectable gain was maintained, given the achieved miniaturization

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IEEE Antennas and Propagation Magazine  (Volume:48 ,  Issue: 6 )