A kind of antenna structure and design method

Abstract

The invention discloses an antenna structure and a design method thereof, wherein the antenna structure comprises a radiation unit and a feed network. An output end of the feed network is connected with an input end of the radiation unit. The feed network is of an axisymmetric structure. The feed network comprises one-to-multiple substrate integrated waveguide power divider and a phase shifter. The phase shifter is connected to multiple output ends of the substrate integrated waveguide power divider. The radiation unit is of a symmetric structure with the symmetric axis of the feed network serving as the center and is connected to the tail end of the phase shifter. The antenna structure overcomes the problems of a relatively large-scale microstrip feed network that the relatively large radiation loss and cross coupling exists in the millimeter wave frequency band, the antenna can also meet middle distance and long distance test requirements of a radar, switching time existing in other schemes is eliminated, the cost is low, and the size is small.

Description

[0001] The invention relates to the fields of electronics, microwave radio frequency, radar and the like, and in particular relates to a structure and a design method of a novel array antenna. Background technique [0002] current technology [0003] Array antennas are used in many occasions due to their advantages of high gain and beamforming, such as radar, communication, navigation, etc. The design of the feed network is a very important part of the design of the array antenna. Microstrip transmission lines are used as a This traditional transmission line form has been widely used, especially in the feed network design of some array antennas. In some special applications, an array form with a large number of array elements and a relatively complex feed network are required. For the millimeter-wave frequency band with high frequency, the complex feed network will not only greatly increase the difficulty of design, but also greatly The large-scale use of microstrip feeding w...

AI Technical Summary

Problems solved by technology

[0009] The problem to be solved by the present invention is: to overcome the large-scale microstrip feed network used by the array antenna, which has relatively large radiation loss and mutual coupling in the millimeter wave frequency band, and proposes a The antenna structure overcomes the shortcomings of switching time, insertion loss, cost increase, and system circuit board area increase in the prior art when solving such problems, and gives the design method of the antenna structure

Images