A compact wideband antenna consisting of a L-shaped radiating element which has a modified inverted-F structure and a C-shaped parasitic radiating element on the ground is proposed. Three resonant frequencies and a very wide operating band are obtained. A prototype of the proposed antenna has been constructed and experimentally studied. The measured results show that the operating bandwidth with 10 dB return loss is about 2.9 GHz (2.11-5.01 GHz), 81.46%, respectively, covering LTE2500 (2.5-2.69 GHz), 2.4 GHz WLAN and 2.5/3.5 GHz WiMAX bands. Furthermore, the antenna has a simple planar structure and small volume of only 30 × 30 × 1.6 mm3. Good radiation characteristics and acceptable peak gains are obtained over the operating bands.
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doi:10.1163/156939311794827104
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doi:10.1163/156939308787537937
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doi:10.1109/LAWP.2010.2051131
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doi:10.1163/156939311795762150
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doi:10.2528/PIERC11021406
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doi:10.2528/PIER12020704
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13. Lee, C.-T., S.-W. Su, and F.-S. Chang, "A compact, planar plate-type antenna for 2.4/5.2/5.8-GHz tri-band WLAN operation," Progress In Electromagnetics Research Letters, Vol. 26, 125-134, 2011.
doi:10.2528/PIERL11073004
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doi:10.1163/156939311798806121
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doi:10.2528/PIERC12052907
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doi:10.1109/TAP.2011.2152315
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