Authors: Aykut Cihangir, Florence Sonnerat, Fabien Ferrero, Gilles Jacquemod, Frederic Gianesello, Romain Pilard, Daniel Gloria, Patrice Brachat, and Cyril Luxey
Source: FERMAT, Volume 9, Article 3, May_Jun, 2015
Abstract: Two antenna designs operating in the LTE/4G cellular frequency bands are proposed in this paper. Both designs consist of a driven strip which capacitively excites a parasitic grounded strip for a better matching response around 700MHz. The antennas are realized using Laser Direct Structuring technology on POCAN plastic material with a height of 5mm above the system Printed Circuit Board. Passive matching circuits are necessary at each antenna’s feed to match the input impedance to 50 Ohm at the desired operating frequency bands (700-960 MHz and 1.7-2.2 GHz for the first design, 700-960 MHz and 1.7-2.7 GHz for the second). The simulation results are validated through S-parameter and total efficiency measurements. To form a basis for future studies, the effect of the hand and the head of the user are investigated versus the antenna performance.
Index Terms: LTE, 4G, LDS, mobile terminal antenna, parasitic element, matching network
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