High-order mode single-pulse antenna based on substrate integrated waveguide

Abstract

The invention discloses a high-order mode single-pulse antenna based on substrate integrated waveguide. A feed network, an upper layer medium base plate and a substrate integrated waveguide cavity aresequentially arranged from top to bottom. The feed network comprises a difference port network and a port network respectively arranged at two ends of an antenna; the substrate integrated waveguide cavity is divided into four independent symmetrical sub waveguide cavities through a first metal through hole in a shape like a Chinese character 'tian'; the difference port network and the port network respectively correspond to two sub waveguide cavities and respectively correspond to one row of second metal through holes; 180-degree phase differences are formed in the sub waveguide cavity corresponding to the difference port network, so that difference beams are obtained; and sum beams are obtained in the sub waveguide cavity corresponding to the port network. The single-pulse antenna provided by the invention has the advantages of simple structure, high radiation efficiency and low profile. The feed network design of the single-pulse antenna is greatly simplified.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a high-order mode monopulse antenna based on a substrate integrated waveguide. It can be applied to X-band microwave radar, astronomical observation, communication and other purposes. Background technique [0002] The monopulse antenna is a precision tracking antenna that appeared after World War II and developed rapidly in the 1950s and 1960s. The monopulse antenna can provide multiple beams at the same time, using a single pulse echo to form a sum beam for detecting the target distance and performing distance tracking, and a difference beam for detecting the angular information of the target and performing angular tracking. When the target position changes, the signal received by the difference beam changes from weak to strong. Therefore, the servo mechanism can be driven according to the change of the difference signal to make the antenna rotate in the azimuth o...

AI Technical Summary

Problems solved by technology

For example, the microstrip antenna array form is used to obtain the low-profile and low-cost characteristics of the monopulse antenna, but the feed network of the microstrip array form antenna and the summator of the monopulse antenna are inevitably distributed among many array elements. This leads to radiation leakage problems and mutual coupling problems between the feed network and the radiating elements, which will have an impact on the performance of the entire antenna

It also increases the complexity of its design

[0005] Dielectric substrate integrated waveguide array antenna has the advantages of low loss and low leakage radiation, but the existing monopulse antenna based on substrate integrated waveguide has problems such as complex feeding network and low aperture efficiency.

Images