The major work of this thesis is to design and make a good LPDA(log-periodic dipole antenna)as the feed of the ten-meter parabolic reflectors at the Yunnan Observatory.
文中所作的主要工作是为云南天文台十米抛物面设计、制造一付好的对数周期偶极子天线（LPDA）作馈源。
A new type of broadband printed twin dipole antenna is proposed in this paper. Corresponding feed structure of broadside coupled parallel line is also designed.
本文给出了一种新型双偶极子型宽带印制天线，并设计出相应的类平行宽边耦合双线双面馈电结构。
To obtain the balanced feed for the dipole antenna driven by a coaxial transmission line, a coplanar waveguide fed structure is used.
为获得在同轴馈电时天线振子的平衡馈电，该设计使用了共面波导馈电结构。
Balanced micro-strip line is utilized as feed line, printed dipole is adopted as radiation element, and a matching network is employed for tuning the input impedance of the antenna.
该天线采用平衡微带线作馈线，以印刷振子作为辐射单元，末端采用匹配电路对其输入阻抗进行匹配。
Through theoretical analysis and numerical simulation, the pattern reconfigurable feasibility of the structures of butterfly, folded dipole and double-feed is analyzed.
本文通过理论分析和软件数值仿真，分析了蝶形结构、折合偶极子结构以及双馈方式实现方向图可重构的可行性。
The log-period dipole array is applied as a feed element for a back-fire antenna.
用对数周期振子阵作为背射天线的馈源。
The log-period dipole array is applied as a feed element for a back-fire antenna.
用对数周期振子阵作为背射天线的馈源。
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