Phased-array antenna with circular truncated cone structure and beam wave direction calculation system and method of phased-array antenna

Abstract

The invention relates to a phased-array antenna with a circular truncated cone structure and a beam wave direction calculation system and method thereof, and belongs to the field combination of antennas and radio orientation. The technical problems that an existing planar phased-array antenna is narrow in beam coverage range and a spherical phased-array antenna system is complex in structure are solved. The phased-array antenna comprises a circular-truncated-cone-shaped antenna substrate, and a plurality of array element antennas are arranged on the upper surface and the side face of the antenna substrate. The beam wave pointing calculation system comprises four paths of first phase shifters, a first power divider, a second power divider, a path of four-way power divider, a third power divider, a fourth power divider, two paths of one-out-of-five switches and a digital signal processing unit, the two paths of one-out-of-five switches are utilized to quickly switch four array element antenna signals located on the upper surface of an antenna substrate, and a phase comparison method is adopted to calculate the beam wave pointing direction. And the wave direction can be calculated within ms-level time. Therefore, the antenna provided by the invention has the characteristics of easy DOA estimation of a planar phased-array antenna and wide beam range of a spherical phased-array antenna.

Description

technical field [0001] The invention relates to a phased array antenna with a wide beam range and a method for measuring the angle of arrival thereof, belonging to the field of antenna and radio orientation combination. Background technique [0002] For simplicity in design, processing and calculation, most phased array antennas use planar arrays, such as figure 1 shown. Although the signal processing of the planar array is simple, the disadvantage is also obvious, that is, the coverage is narrow, and generally it can only be used in the range of ±60°. Therefore, in order to improve the beam coverage, some manufacturers have developed spherical phased array antennas. figure 2 . The spherical phased array antenna has basically the same gain in all directions, and can work within the range of ±90°. Since all the array element antennas are in different attitudes, it is impossible to obtain an array element antenna with basically the same gain, and perform DOA (beam pointing...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problem that the beam coverage of the existing planar phased array antenna is narrow and the spherical phased array antenna needs to rely on inertial navigation, magnetic compass or global satellite positioning system to achieve beam pointing measurement, which leads to a relatively complicated technical problem in the whole system structure , the present invention provides a phased array antenna with a circular frustum structure and its beam pointing measurement method. Combining the respective advantages of the planar array and spherical array antennas, it can not only have a wide beam coverage, but also obtain the beam pointing through simple calculations without Realized by external measurement system, the structure is relatively simple

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