用于无线通信的新型宽带旋转贴片天线设计

Novel broadband and rotated-patch antenna for wireless communication

设计了一种用于无线通信的新型宽带旋转贴片天线，通过对称旋转天线的矩形辐射贴片，天线的带宽得以显著扩展．讨论了贴片旋转角度及其他结构参数对天线带宽的影响．为了验证该设计的有效性，对所设计的天线原型进行了实际制作和测试．测试结果表明，所设计天线的阻抗带宽（10dB回波损耗）可达6．97GHz（2．29～9．26GHz），相对带宽约为120．7％，这一带宽接近传统交叉单极子天线带宽的两倍．此外，该天线在整个工作频率范围内具有较好的全向辐射特性和增益水平．

A novel broadband rotated-patch antenna for wireless communication applications is proposed. By rotating the rectangular patches symmetrically, the bandwidth of the antenna can be significantly enhanced. Especially, the effect of the rotating angle and other geometry parameters on the bandwidth has been studied in detail. An antenna prototype is then fabricated and measured to verify the effectiveness of this design. The measured results indicate that the proposed antenna can achieve an impedance bandwidth （10dB return loss） as wide as 6. 97GHz （2.29- 9. 26GHz） or the relative bandwidth is about 120.7%, which is nearly two times what the corresponding conventional cross monopole antenna does. Also relatively good omnidirectional radiation performance and antenna gain over the whole frequency range have been achieved.