Miniaturized ultra-wideband high-gain cavity-backed antenna and array thereof

The invention discloses a miniaturized ultra-wideband high-gain cavity-backed antenna and an array thereof. The back cavity antenna comprises a miniaturized back cavity, a broadband radiation oscillator and a balanced feed body, the balanced feed body is erected at the bottom of the miniaturized back cavity, the broadband radiation oscillator is arranged on the balanced feed body, and the broadband radiation oscillator is located at a cavity opening of the miniaturized back cavity. The array of the cavity-backed antenna is formed by the cavity-backed antenna array. The invention has the beneficial effects that the back cavity is optimally designed based on current analysis, the miniaturization of the back cavity is realized, the ultra-wideband impedance matching is met, the aperture size is only 1.2 lambda min * 0.7 lambda min, the working bandwidth reaches 2.5: 1, and the standing wave is less than 2.5; a balanced feed mode is adopted, the beam symmetry is good, the half-power beam width is larger than 78 de