强耦合天线阵列研究+文献综述
毕业论文关键词 强耦合 宽带 高增益 小型化
Title Study of A Tightly Coupled Antenna Array
Abstract With the increasingly rapid development of modern wireless communication technology, the new generation of communication equipment and imaging radars require wider bandwidth to transmit high rate data and high quality images. Most of the time, these systems have to work at high power, which requires the antenna with broadband and even ultra-wideband and high gain. The development of traditional wideband antenna array has achieved fruitful results, but meanwhile, there are many inevitable shortcomings and limitations. For example, the bandwidth of the antenna element is difficult to be further expanded, due to mutual coupling of the array elements, and the transversal size of antenna array is often large beyond demands. For this issue, we present the antenna array based on tightly coupled effect which proposed in recent years. In this paper, we analyze the principle of realizing wide band utilizing the model of tightly coupled antenna array. The interdigital capacitor structure of tightly coupled antenna unit is designed，and applied in infinite array environment into a 1*8 linear array. As a result, a 3-octave band is obtained. Furthermore, we designed a wideband linear antenna array which has only two units, and a balun feeding network is also shown. Finally we comprised a 1 * 8 planar array of tightly coupled dipole elements with this two-unit structure. The antenna array operates at 6-18GHz. The concept is validated by simulations. The simulated result demonstrates that a 10dB array gain can be easily achieved and active VSWR is less than 2 over the operation frequency range. Thus we realized the design of wideband, easy to conform and miniaturization antenna array.
Keywords tightly coupled wideband high gain miniaturization
目 次
1 引言1
2 强耦合宽带天线阵列的基本理论 … 5
2.1 强耦合效应宽带天线阵列的工作原理5
2.2 本章小结… 7
3 基于强耦合的宽带天线阵列初步设计8
3.1 设计指标… 8
3.2 单元形式的选择8
3.3 交指电容结构单元的设计与仿真9
3.4 一文无限大环境周期阵列的摸拟… 12