Equipment conformal slot coupled antenna based on liquid crystal adjustable material

Abstract

The invention discloses an equipment conformal slot coupled antenna based on a liquid crystal adjustable material. The antenna adopts a Minkowski fractal microstrip structure, so the electric length of the radiation patch is increased, the size of the antenna unit is reduced, the influence of curved surface curvature change on antenna radiation is reduced, the bandwidth of the antenna unit is improved by adopting a strip line slot coupling feed structure, the surface wave loss of the antenna unit is reduced, and a radiation element and a feed network are better isolated; by designing the rectangular slot gap in the floor layer, surface wave propagation between antennas can be suppressed, and coupling between conformal array antenna units is effectively reduced; by designing the liquid crystal tuning circuit, the liquid crystal is applied to the antenna unit, electric tuning is carried out to change the equivalent dielectric constant of the liquid crystal, frequency reconfiguration is realized, and the anti-interference capability of the equipment conformal antenna is improved, so the bandwidth and gain of the existing antenna are improved, and the radiation influence is reduced.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to an equipment-type slot coupling antenna based on liquid crystal adjustable materials. Background technique [0002] With the rapid development of electronic technology and the continuous deepening of electromagnetic research, the antenna is an indispensable key component for signal reception and transmission. Its development and application have penetrated into many fields such as radar, electronic countermeasures, navigation and communication. The army's requirements for real-time communication and the ability to transmit important information on the battlefield have promoted the research of advanced antenna technology. The design and development of high-performance new antennas have become an urgent need. [0003] Equipped with common-type antennas are widely used in aviation aircraft, missiles and other weapons and equipment. Equipping common-type antennas on aircraft and mi...

AI Technical Summary

Problems solved by technology

[0004] However, the existing planar antenna has a limited scanning range, the gain gradually decreases with the increase of the scanning angle, and the lobes gradually widen with the increase of the scanning angle. When it is applied to high-speed aircraft such as fighter jets and missiles, it will not only seriously affect its aerodynamic characteristics , will also increase a series of problems such as radar cross section

However, the mutual coupling suppression between microstrip common array antenna elements is serious, the profile is high, the bandwidth is narrow, and the gain is low.

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