科研之友
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摘要
The open-slot antenna is very suitable for applications in the metal-framed tablet device, such as the tablet computer, to achieve a low profile with wideband or multiband operation. This article presents a U-shape open-slot (U-slot) antenna with a low profile of 7 mm to the top edge of the metal-framed tablet computer for the LTE operation. The U-slot has a simple structure of length 70 mm and the two slot openings thereof are disposed at the metal frame. The U-slot antenna is fed using an end-shorted 50- microstrip feedline, with a wideband matching network embedded therein. The antenna can support a 0.5-wavelength slot resonant mode supported by the U-slot itself and a 0.25-wavelength slot resonant mode created by the open-slot radiator (denoted as Slot 1 in this study) formed between one slot opening and the microstrip feedline as a virtual shorting. By further using an inverted-U strip connecting across the U-slot, the antenna can create an additional open-slot radiator (denoted as Slot 2 in this study) to generate a 0.25-wavelength slot resonant mode at lower frequencies. The resonant modes supported by the U-slot, Slot 1, and Slot 2 can form two wideband operating bands to cover the LTE operation in the 698-960 and 1710-2690 MHz bands. Details of the proposed U-slot antenna and the effects of the inverted-U strip connecting across the U-slot and the matching network are addressed. Experimental results of the fabricated U-slot antenna are also presented.
- 出版日期2015-11
- 单位中山大学
