A miniaturized multiband broadband quasi-self-complementary antenna (QSCA) is presented, which mainly consists of a third-step radiation patch on the right and a third-step wide slot on the left. With the help of an L-shaped metal ground patch, a coplanar waveguide (CPW)-like matching technique is used to improve the impedance matching of the antenna. To further compress the antenna, a U-shaped slot and a branch patch are loaded in the antenna, which makes the proposed antenna exhibit a broadband property with a compact size. The measured results show that the proposed antenna can cover 698-960 MHz (low band), 1427-1518 MHz, 1710-2690 MHz (middle band), and 3300-3800 MHz (high band) successfully. The compact size (100 mm x 25 mm) and simply printed geometry is suitable for wireless broadband devices.
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机译：提出了一种小型化多频段宽带准自互补天线（QSCA），该天线主要由右侧的第三级辐射贴片和左侧的第三级宽槽组成。借助L形金属接地贴片，采用类似共面波导（CPW）的匹配技术来改善天线的阻抗匹配。为了进一步压缩天线，在天线中加载了一个U形槽和一个分支贴片，这使得所提出的天线具有紧凑的宽带特性。实测结果表明，所提天线能够成功覆盖698-960 MHz（低频段）、1427-1518 MHz、1710-2690 MHz（中频段）和3300-3800 MHz（高频段）。紧凑的尺寸 （100 mm x 25 mm） 和简单的打印几何形状适用于无线宽带设备。
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