Ultra-narrow-band navigation interference antenna design method, antenna and application thereof

Abstract

The invention discloses an ultra-narrow-band navigation interference antenna design method, which belongs to the technical field of interference antennas, and comprises the following steps of: 1) estimating the size of a microstrip patch according to material parameters of a dielectric substrate; 2) combining the plurality of microstrip patches to form an array antenna in a series-feed mode or a parallel-feed mode; 3) controlling the excitation current of each microstrip patch by adopting a microstrip patch width gradual change method, so that the current on each microstrip patch on the arrayantenna complies with Chebyshev distribution; 4) optimizing the length of the feeder line connected with each microstrip patch to ensure that each microstrip patch is in the same phase so as to realize the edge emission characteristic, and 5) carrying out simulation optimization on the array antenna, The method has the advantages of strong orientation capability, high energy density, small environmental influence and the like.

Description

technical field [0001] The present invention mainly relates to the technical field of jamming antennas, in particular to a design method of ultra-narrowband navigation jamming antennas, antennas and applications thereof. Background technique [0002] With the rapid iteration of UAV airborne communication systems, UAVs with self-made communication and non-cooperative inertial navigation systems will become the main threat to electronic tool warfare in the future. With the development in the direction of changing transients, the traditional "drone" jamming equipment realizes the electromagnetic suppression of the uplink of the drone, and there will be a large area of ​​"blinding". Power navigation interference equipment cannot achieve precise strikes, causing secondary damage to the environment and equipment, and has a serious impact on non-UAV inertial navigation system equipment. Therefore, the deficiencies of the existing navigation jamming antennas have the following poin...

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Problems solved by technology

[0003] 1. Existing navigation jamming antennas usually use a single-antenna design. It can be known from antenna theory that the radiation beam width of a single antenna is wide and the gain is low, so that the radiation energy density is poor, resulting in poor directional jamming performance of the jammer. Antenna radiation side lobes are likely to interfere with the timing system of local communication base stations, resulting in the paralysis of the communication network;

[0004] 2. With multi-unit array interference, the gain will increase accordingly, but the front-to-back ratio has not improved significantly, and the feed network at the back end of the array will become more complicated, which will increase the complexity of the system, and the cost of the array will also be corresponding The higher the value, it is not conducive to product development and production;

[0005] 3. In the low-frequency navigation frequency band, the frequency band division is complicated, and the frequency domain bandwidth of the navigation interference antenna is wide, which may easily cause interference to navigation systems in different frequency bands in the controlled area. For example, the distance between the L1 frequency band of Beidou BD2 and the L1 frequency band of GPS is less than 13MHz

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