一种层叠结构双频圆极化GPS天线的设计

The Design of Dual-band Stacked Microstrip Patch Antennas for GPS Applications

运用腔模理论,结合多馈点网络和表面开槽技术,提出了一种新型、高效的层叠结构的GPS微带天线.时域有限差分法(FDTD)模拟仿真表明,该设计通过改变贴片以及其上所附加调节枝节的尺寸,使电场强度重新分布,可实现在所需工作频率点的谐振.同时,上层寄生单元上开孔,在提高天线辐射场的对称性的同时,有效地提高了天线的辐射效率.在通信波长范围,该设计结构尺寸小、频带宽、易于实现双频圆极化,在无线通信领域具有重要的发展前景.

It presents the design of a kind of novel and high-efficient dual-band stacked microstrip patch antennas,based on cavity model theory,the technology of sloting on the surface of the patch,and multiple feed points technology..The property of the microstrip antennas has been numerically simulated using the Finite Difference Time Domain（FDTD） method.By simply tuning the size of the patch and the turning-stub,and inducing the redistribution of the power of the electric field,the production of resonance in the desirable frequency can be achieved.At the same time,the upper layer which is the parasitic element of the under layer is perforated for improving the symmetry of the radiation field and the radiation efficiency.These excellent features,including the small size,the wide band,and the easy achievement of dual-band circular polarization,make the design have promising prospects in the future of wireless communication.