一种轻薄型共面波导圆极化整流天线

CPW-Fed Light-weight Circularly Polarized Rectenna

摘要:

本文设计了一款应用于近地飞行器的轻薄圆极化整流天线，飞行器普遍载荷有限，且在不断地运动，因此要求整流天线具有圆极化、重量轻、体积小、剖面低、易与飞行器表面共形等特点.本文设计的整流天线工作在5.8 GHz，采用共面波导耦合馈电，具有较宽的工作带宽.后端整流电路采用串联二极管形式，并利用共面波导低通滤波器进行直流滤波，不需要使用任何集总元件.该整流天线结构紧凑，全重仅1.98 g，剖面厚度0.5 mm，最佳整流效率71.22%.测试结果与仿真结果吻合良好，验证了该设计的可行性.

Abstract:

In this paper, a thin circular polarization rectenna for near space aerocrafts is designed. Since aerocrafts are generally limited in load and moving continuously, the rectenna should have the characteristics of circular polarization, light weight, small volume, low profile, and is easy to be conformed to the surface of aerocrafts. The rectenna designed in this paper works at 5.8 GHz and is fed by coplanar waveguide (CPW), which has a wide bandwidth. The rectifier circuit adopts series diode form, and uses CPW lowpass filter for DC filtering without using any lumped elements. The designed rectenna, which only weighs 1.98 g, has a compact structure and a 0.5 mm thick profile, and the optimum rectification efficiency is 71.22%. The test results are in good agreement with the simulation results, which verifies the feasibility of the design.