A tightly coupled dipole array antenna with high power and broadband
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摘要: 提出了一种新型高功率微波宽带紧耦合偶极子阵列天线。在常规的紧耦合偶极子阵列天线的基础上，该阵列天线通过采用全金属结构设计、天线匹配层和密封层一体化设计以及调节天线结构的手段，获得了宽带高功率性能。仿真结果显示，在0.8～4.0 GHz的范围内，天线未扫描时的驻波比小于2；在16 mm×32 mm单元尺寸内和1个大气压的SF6气体中，功率容量达到0.12 MW；以该单元天线组成10×10阵列，100个单元总尺寸仅为160 mm×320 mm，在1个大气压的SF6气体中，功率容量可以达到12 MW，另外，该天线可实现45°的宽角扫描。该阵列天线的提出为实现高功率微波宽带天线的宽频带、大角度扫描、紧凑化、小型化以及低剖面化提供了参考。Abstract: A novel tightly coupled dipole array antenna with high power and broadband is proposed in this paper. On the basis of conventional tightly coupled dipole array antennas, and by adopting an all-metal structure design, an integrated design of antenna matching layer and sealing layer, and a method of adjusting the antenna structure, a high-power and broadband performance of such an array antenna is obtained. The simulation results show that the standing wave ratio of the array antenna is less than 2 at the broadside in the range of 0.8-4.0 GHz. And the power capacity of an element antenna reaches 0.12 MW within the size of 16 mm × 32 mm in the space full of SF6 at one atmospheric pressure. Moreover, the power capacity of the 10×10 array antenna composed of 100 elements can reach 12 MW within the size of 320 mm × 640 mm in the space full of SF6 at one atmospheric pressure. In addition, the array antenna can achieve a wide-angle scan of 45°. The proposed array antenna provides a solution for high-power microwave broadband antennas to achieve a broadband, large-angle scanning, compact, miniaturized, and low-profile performance.
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Key words:
- high-power microwave /
- tight coupling /
- beam scanning /
- power handling capacity /
- compactness
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图 8 阵列天线三维辐射方向图
Figure 8. Three-dimensional radiation pattern of tightly coupled dipole array antenna
图 9 紧耦合偶极子天线的E面和H面的波束扫描特性
Figure 9. Beam-scanning performance for E-plane and H-plane of tightly coupled dipole array antenna
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