The invention relates to the technical field of
satellite navigation antennas and particularly discloses a micro-strip navigation antenna with an air back cavity. The inner part of the structural cavity in a navigation antenna
package is of a groove structure, and the
peripheral walls of the groove structure form a structural cavity
enclosure structure, and a micro-strip printed board emitting layer radio-frequency substrate is installed on the structural cavity
enclosure structure, so that the micro-strip printed board
radiation layer radio-frequency substrate and the structural cavity form an air back cavity
radiation layer; a micro-strip printed board
radiation layer
metal pattern is printed on the upper surface of the micro-strip printed board radiation layer radio-frequency substrate,a feed connector is arranged on the back of the structural cavity, so that a feed connector conductor in the feed connector penetrates through the structural cavity and is connected with the
metal pattern. The air back cavity radiation layer additionally arranged in the structural cavity is used, so that the defects that a traditional micro-strip
satellite navigation antenna is small in radiationbandwidth, low in radiation efficiency, poor in directionality and the like are overcome, and the
engineering problem for the micro-strip antenna being installed in large temperature change and beingused for actual
satellite navigation applications such as approaching multi-frequency points and the like is solved.