Airborne navigation antenna

Abstract

The invention provides an airborne navigation antenna, which comprises an antenna radiator 100, wherein the antenna radiator 100 is printed on a dielectric slab and comprises a gliding radiating unit 101, a heading radiating unit 102, a grounding wire 104 and a high-impedance strip-type line 103; the radiating units (101 and 102) are provided with vibrators consisting of strip-type lines and are connected with matched strip-type lines (106 and 107); the gliding radiating unit 101 is connected with the heading radiating unit 102 through the high-impedance strip-type line 103; the heading radiating unit 102 is connected with the grounding wire 104 through a loaded inductor 105; and the antenna radiator 100 feeds a signal through the gliding radiating unit 101. The airborne navigation antenna is compact in structure, attractive in appearance, and high in reliability, matching loss brought by a matching circuit is not generated, electrical performance is excellent, and the airborne navigation antenna can be used as a matching antenna of a landing system of a high-speed airborne instrument.

Description

technical field [0001] The invention belongs to the field of airborne navigation, and in particular relates to an airborne navigation antenna. Background technique [0002] The instrument landing system (ILS) is composed of the airborne glide marker beacon receiving equipment and the ground glide marker beacon transmitter. Next, guide the aircraft to approach and land according to the indication of the instrument. [0003] The heading frequency band used by the instrument landing system is 108MHz~112MHz, and the glide frequency band is 328MHz~336MHz. The system informs the displacement of the aircraft on the azimuth plane landing route (or glide path) by comparing the modulation depth of the two received signals sent by the ground station set on the edge of the runway with horizontal polarization. The ability to suppress spurious multipath signals caused by radiation, reflection, and cross-polarization. The airborne antenna receives the radio frequency signals emitted by ...

AI Technical Summary

Problems solved by technology

[0004] At present, the airborne antenna of the instrument landing system at home and abroad is mainly installed on the vertical tail of the aircraft, and the left and right antennas are installed symmetrically. They are protruding installations, which have a certain impact on the aerodynamic performance and appearance of the aircraft; the other is the heading system. It is equipped with a separate antenna for the glide system and installed on the nose of the aircraft. This method increases the number of antennas, increases the weight, affects the overall layout of the aircraft, and reduces reliability.

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