Active wide band miniaturized navigation antenna

The invention discloses an active wide band miniaturized navigation antenna divided into five layers, wherein from top to bottom, a first layer is a radiation layer, a second layer is an L-shaped probe feed layer, a third layer is a secondary feed network layer, a fourth layer is a primary feed network layer and a fifth layer is a low noise amplification (LNA) circuit part. A radiation patch is located on the top of dielectric of the first layer, the second layer is composed of four L-shaped probes, a horizontal part is printed on the dielectric layer, a perpendicular part penetrates through the dielectric layer and is connected with output ports of a secondary feed network, the third layer is composed of two pairs of power dividers provided with 90-degree wide band phase shifters, the fourth layer is composed of a pair of power dividers provided with 180-degree wide band phase shifters, the fifth layer is a single-stage amplifying circuit and mainly comprises a bias part, an amplifying part, a front part, a