Subjects: Geosciences >> Space Physics submitted time 2017-03-10
Abstract：提出了一种单层的具有多谐振结构的微带反射阵单元,利用HFSS对其反射相位特性进行仿真分析，获得了约430°的反射相位动态范围，并且反射相位曲线的线性度较好。根据此单元设计了一个工作在Ku波段的微带反射阵，用指数渐变槽线（Vivaldi）天线作为该反射阵的馈源。仿真结果表明，在中心频率处增益可达27.1dB，半功率波瓣宽度均为4.96°，在12GHz-15.5GHz的频带内增益波动约2dB，具有较宽的频带。将此Vivaldi天线和反射阵天线进行加工测试，得到的测试结果与仿真结果吻合的较好。
Peer Review Status:
Awaiting Review
Subjects: Geosciences >> Space Physics submitted time 2016-05-03
Abstract： Millimeter-wave space-borne antennas with multi-band and multi-polarization have many advances such as high gain,low side-lobe,high beam efficiency and low loss.The operating frequency of the antenna includes 18.7,23.8 and 37.0 GHz.The use of common feed system has significance for saving volume and enhancing structure stiffness.And the ring-loaded corrugated conical horn can cover octave bandwidth.The orthomode transducer(OMT)with new turnstile junction and frequency divider was employed to separate dual polarizations signals and then divide different frequencies into their own receivers,respectively.The cross polarization levels are -32.6,-31.6 and -25.0 dB in 18.7,23.8 and 37.0 GHz,respectively.The side lobe levels are -21,-30 and -30 dB.Due to compact structure and multiple observations for one target,the simulation result demonstrates the design of feed system is suitable to space-borne antennas.
Peer Review Status:Awaiting Review
Subjects: Geosciences >> Space Physics submitted time 2016-05-03
Abstract： A novel single layer microstrip reflectarray element with multi-resonance structure is proposed in this paper.HFSS soft ware is used to analyze the reflect phase for the designed element.About 430皉eflect phase range is obtained with the reflect phase curve nearly linear.A microstrip reflectarray composed of the proposed element is designed for Ku band and a Vivaldi antenna is used as the feed.The results indicate that the gain reaches 27.1 dB at the center frequency,and the half power beamwidth is 4.96�The gain changes less than 2 dB in the range of 12~15.5GHz,which shows that the reflectarray has wide band.The Vivaldi antenna and the reflectarray is manufactured and tested,and a well coincide is obtained between the simulation results and the test results.
Peer Review Status:Awaiting Review
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