Abstract
In this letter, a novel and compact printed monopole antenna is presented, which has a simple but effective radiating patch for multiband wireless communication systems and mobile devices. Operational bands covered simultaneously by the antenna include the following: UMTS (1920-2170 MHz), 2.4-GHz WLAN (2400-2484 MHz), mobile WiMAX (IEEE 802.16e 2500-2690 MHz), 5-GHz WLAN (5150-5350/5725-5825 MHz), and ITS (5795-6400 MHz). A parametric study is applied in the antenna design process to achieve the required operational frequency bands. Desired resonances can be tuned by adjusting the gaps between the radiating semicircular arms and central feed-line, as well as embedding a dielectric slot in the ground surface. The antenna has dimensions ~ 20×20×1 mm3, which is smaller than previously proposed monopole structures. The design concept was validated by fabricating the antenna prototype and measuring its characteristics. The measured results show the antenna exhibits omnidirectional radiation and appropriate gain.
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