In this paper a design of a new antenna with modified ground plane is validated for multiband applications. The proposed modified ground structure is incorporated with a patch antenna to boost the performance. The antenna's entire area is 59.5x47mm 2 and is printed on an FR-4 substrate and fed by a 50 Ohm microstrip line. This structure is validated in the GPS (1.56-1.58 GHz) band at 1.57 GHz, in the ISM (2.43-2.49 GHz) band at 2.45GHz and in the WiMAX (3.50-3.56 GHz) band at 3.53 GHz. These three frequency bands have good matching input impedance for, S11≤-10 dB. The antenna presents a good performance in terms of radiation pattern, and it is designed, optimized, and miniaturized by using CST-MW whose results are compared with other solvers HFSS and ADS. The results obtained by the use of the three EM solvers are in good agreement. After realization, we have tested and validated this antenna. The measurement results of the antenna present a good agreement with the numerical results.
Keyword:GPS band ISM band Modified Ground Structure Multibande Antenna WiMAX band
In this paper, a novel study on the design and analysis of a compact printed antenna for multi-band applications are presented. The structure of the entire area is 45x45.5 mm 2 and is printed on an FR-4 epoxy substrate. It is suitable for GSM/GPS/PCS applications by using an M-shaped antenna which is formed of different arms and an L-shaped shorted strip connected between the feeding line and the ground plane. Simulation results of the antenna input impedance bandwidths for, Sl1 ::; (-10) dB, show that it covers the GSM, GPS and PCS bands. Also, a stable radiation pattern and an average antenna directivity of 2.18 dBi across the operating bands have been obtained by using ADS" Advanced DesignSystem". Also, we have conducted another study by using CST MW to compare the results obtained with ADS which give good agreement between the both EM solvers.
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