Design of Thin-membrane Printed Dipole
Future space-based radar and spaceborne SAR require very large aperture and high-gain phased array antennas. Membrane-based deployable antennas provide a means to reduce mass, stowage volume, and overall cost of radar antenna system. JPL has developed some array antennas which are based on thin-membrane structure, and the elements of these antennas are microstrip antenna. But there are some distinct disadvantages associated with these thin-membrane microstrip antennas, as shown in Section 1 of this paper. As an improved antenna element, a novel printed dipole which based on thin-membrane structure is presented in this paper. This thin-membrane printed dipole is center fed by parallel-strip (PS), which is transformed from coplanar waveguide (CPW) by using a vertical transition balun. This vertical transition between CPW and PS has a wide frequency band due to the two waveguide structures have little or no variation of their characteristic impedance with respect to frequency and can meet the design requirement of thin-membrane printed dipole. The use of CPW in the feed network makes this printed dipole easily be integrated with T/R modules. The whole thin-membrane printed dipole with vertical transition balun is simulated by means of Ansoft HFSS. From the simulation result, it is know that this printed dipole has wide bandwidth of 190MHz (15.2％) and good radiation characteristic with low cross-polarization (< -30 dB). The thin-membrane printed dipole is a very useful antenna element for future large aperture, lightweight, deployable and high-gain phased array application.
Daqun Yu Ruiping Zhu
Nanjing Research Institute of Electronics Technology,Nanjing 210013,China Nanjing Research Institute of Electronics Technology,Nanjing 210013,China;China National Key Laborat
国际会议
Progress in Electromagnetics Research Symposium 2009(2009年电磁学研究新进展学术研讨会)(PIERS 2009)
北京
英文
497-501
2009-03-23（万方平台首次上网日期，不代表论文的发表时间）