Electrically Small Superconducting Antennas With Bandpass Filters
Electrically Small Superconducting Antennas With Bandpass Filters
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DOI：
10.1109/tasc.2007.898273
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发表时间：
2007-07
影响因子：
1.8
通讯作者：
S. Oda;S. Sakaguchi;H. Kanaya;R. Pokharel;K. Yoshida
中科院分区：
文献类型：
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作者：
S. Oda;S. Sakaguchi;H. Kanaya;R. Pokharel;K. Yoshida
为了减小无线系统的尺寸，我们提出了电小天线（ESA）的设计公式，即尺寸远小于波长的天线，具有连接到50 Ω外部电路的小型化匹配电路。利用传输线电路（传输线模型）和电磁场模拟器，研究了采用本理论设计阻抗匹配电路的缝隙偶极子天线的理论性能。我们设计了一个缝隙偶极子天线的辅助下，使用的电路以及电磁场模拟器的模拟。在MgO基片上设计的天线尺寸为4.1mm × 1.9mm，中心频率为5GHz，相对介电常数为9.6，在RL（回波损耗）=-3dB时设计的带宽为13%。为了验证理论，我们还进行了实验的缝隙偶极子天线的匹配电路的极数n = 2使用高温超导体YBCO MgO基板上在5 GHz频段。
In order to reduce the size of a wireless system, we have proposed the design formulas for an electrically small antenna (ESA), i.e. an antenna whose dimension is much smaller than a wavelength, with a miniaturized matching circuit which connects to a 50 Omega external circuit. Theoretical performances of the slot dipole antenna with the impedance matching circuit designed by the present theory are studied by the electrical circuits using transmission lines (transmission line model) as well as the electromagnetic (EM) field simulator. We designed a slot dipole antenna with the aid of the simulations using the electrical circuits as well as the EM field simulator. The size of the designed antenna including the matching circuit is 4.1 mm times 1.9 mm on MgO substrate with relative permittivity of 9.6 at the center frequency of 5 GHz, and the designed fractional bandwidth is 13% @RL (return loss) = -3 dB. In order to demonstrate the theory, we also carried out experiments on the slot dipole antenna with the matching circuits of pole number n = 2 using high temperature superconductors YBCO on MgO substrates in the 5 GHz band.