Abstract
This paper proposes a segmented parabolic curved antenna, which can be used in the base station of a 60 GHz millimeter wave communication system, with an oblique Yagi antenna as a feed. By analyzing the reflection and multi-path interference cancellation phenomenon when the main lobe of the Yagi antenna is reflected, the problem of main lobe splitting is solved. 3D printing technology relying on PLA (polylactic acid) granule raw materials was used to make the coaxial connector bracket and segmented parabolic surface. The reflective surface was vacuum coated (via aluminum evaporation) with low-loss aluminum. The manufacturing method is environmentally friendly and the structure was printed with 0.1 mm accuracy based on large-scale commercial applications at a low cost. The experimental results show that the reflector antenna proposed in this paper achieves a high gain of nearly 20 dBi in 57–64 GHz frequency band and ensures that the main lobe does not split.
Highlights
With the rapid development of broadband technology, there is a large potential market demand for wireless communication with 1 Gbit capacity per second
PLA plastics used in plastic powder additive manufacturing technology (i.e., 3D printing technology) are naturally degradable and environmentally friendly, while substrates made by 3D printing can be formed by vacuum plating to form reflective surfaces for antennas
The 3D printing accuracy of existing commercial applications can reach a range of 0.1 mm; with low cost, which is very suitable for the millimeter wave frequency band
Summary
With the rapid development of broadband technology, there is a large potential market demand for wireless communication with 1 Gbit capacity per second. The substrate integrated antenna [1,2,3,4] and the microstrip antenna [5] can meet the above requirements but to achieve high gain, the above two antennas need to adopt an array combination and the feed network is very complicated This increases the profile of the antenna, which means more corrosive liquid in manufacturing, causing consequent environmental pollution problems. In view of the above problems, this paper adopts 3D printing technology to realize the antenna reflection surface and utilize the planar Yagi antenna as the feed source, achieving seamless integration of the on-chip antenna and the active module. In order to meet the key indicators of the above 60 GHz millimeter wave base station antenna, this paper adopts the oblique reflection surface structure, which eliminates the shadowing effect of the feed and eliminates the main lobe splitting caused by multipath interference cancellation. Antenna accuracy of existing commercial applications can reach a range of 0.1 mm; with low cost, which is Antenna
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