Array antenna structure and design method thereof

Abstract

The invention provides an array antenna structure and a design method thereof, wherein the array antenna structure comprises a feeding network and a radiation sub-array. The feeding network comprises a power divider and a plurality of phase shifters. The power divider is a substrate integrated waveguide T-type power divider. The phase shifter has a combined structure in which a substrate integrated waveguide and a microstrip line are combined. The T-type power divider comprises a signal input end and a plurality of signal output ends which are parallelly arranged. Each signal output end is connected with one phase shifter. The width of the substrate integrated waveguide of the substrate integrated waveguide T-type power divider is same with that of the substrate integrated waveguide used as phase shifter input. The array antenna structure and the design method thereof have advantages of reducing self radiation of a supply network, reducing sidelobe level of the vertical surface of the array antenna and reducing effect of machining precision to the supply network for preventing antenna performance reduction. Furthermore simple design and convenient adjustment are realized. Furthermore the array antenna structure and the design method thereof can improve design efficiency of engineering technical personnel.

Description

technical field [0001] The invention relates to the field of electronics, in particular to an array antenna structure and a design method. Background technique [0002] With the development of social economy and the improvement of people's living standards, cars are becoming more and more popular. At the same time, frequent road traffic accidents have forced driving safety to become a topic of widespread concern. The key component of vehicle radar has become a research hotspot in academia and industry. Antenna is a key period in a wireless electronic device, and its performance will determine the performance of the entire wireless electronic device. [0003] Substrate integrated waveguide (SIW) is a new type of waveguide structure that can be integrated into a dielectric substrate. In this structure, multiple metallized through holes are arranged at a certain interval in the dielectric substrate to form a smooth side wall of the waveguide. The alternative structure of the ...

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Problems solved by technology

[0008]Second, the standing wave and phase of the feeding network with microstrip T-shaped structure are difficult to adjust separately, and the design is relatively difficult

[0010]In short, when using a microstrip structure network to realize a high-gain antenna, the radiation of the feed network itself will deteriorate the performance of the array antenna, and the complexity of its design It is not conducive to improving the design efficiency of engineers, and sometimes it is difficult to guarantee high PCB accuracy requirements

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