Design and development of electronically tunable microstrip antennas
Design and development of electronically tunable microstrip antennas
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DOI：
10.1088/0964-1726/8/2/009
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发表时间：
1999-04
影响因子：
4.1
通讯作者：
V. Varadan;K. A. Jose;V. Varadan
中科院分区：
文献类型：
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作者：
V. Varadan;K. A. Jose;V. Varadan
传统微带天线的窄带宽在实时应用中存在许多限制。可调谐介电和磁性材料为这个问题提供了解决方案。本文介绍了钛酸锶钡衬底上介电可调谐微带天线的设计和实验研究。通过改变所施加的偏置电压，发现天线的谐振频率变化超过3%。通过使用适当的隔直电路和更高的偏置电压，可以实现更多的可调性。已经确定，这些基板材料的介电常数变化超过 50%，具体取决于改变偏置电压时的 BST 成分。还可以在衬底处理过程中将介电常数控制在 15 至 1500 范围内，同时在可调谐性方面进行一些权衡。人们发现BST衬底的可调谐性在宽带微带天线阵列和移相器的开发中具有优势。
The narrow bandwidth of conventional microstrip antennas has many restrictions in real-time applications. The tunable dielectric and magnetic materials offer solutions to this problem. This paper presents the design and experimental investigations on a dielectric tunable microstrip antenna on barium strontium titanate substrate. The resonant frequency of the antenna is found to change more than 3% by changing the applied bias voltage. It would be possible to achieve more tunability by using proper dc blocking circuits and higher bias voltages. It is already established that the changes in dielectric constant of these substrate materials are more than 50% depending on the BST composition on changing the bias voltage. It is also possible to control the dielectric constant during the processing of substrates in the range of 15 to 1500 with some trade-off in tunability. The tunability of the BST substrate is found to have advantages in development of wideband microstrip antenna arrays and phase shifters.