CN-122000670-A - Directional diagram reconfigurable liquid transparent antenna applied to ocean communication

Abstract

The invention provides a pattern reconfigurable liquid transparent antenna applied to marine communication. The antenna consists of a hexagonal star-shaped radiation cavity, an inverted L-shaped feed probe and a liquid ground. Through design processing, the whole antenna realizes full transparency except a feed structure, has good optical stealth effect, and has more application scenes. By utilizing the fluidity of the liquid, the electric field distribution of the radiation cavity is changed by injecting distilled water into different cavities, so that different patterns are generated. The antenna can realize the function of directional diagram reconstruction in the range from 2.22 to 2.63 GHz, and has five state directional diagram switching modes of +/-15 degrees, +/-35 degrees and 0 degrees respectively, and meanwhile, the antenna has good impedance matching and radiation directivity, and has good optical stealth effect due to transparent appearance.

Inventors

• WANG TAO
• TANG FENGYU
• YIN DAWEI
• LIU WENBO

Assignees

• 西北民族大学

Dates

Publication Date

20260508

Application Date

20260209

Claims (6)

1. 1. A pattern reconfigurable liquid transparent antenna applied to ocean communication is characterized in that the antenna adopts a double-layer structure, and a main body of the antenna comprises a top hexagonal star-shaped radiation cavity (2), an inverted L-shaped feed probe (3) and a bottom water tray (1). Six transparent columns are used for connecting the hexagonal star-shaped radiation cavity (2) and the bottom water tray (1), and the inverted L-shaped feed probe (3) penetrates through the bottom water tray (1) and is positioned in an air layer between the hexagonal star-shaped radiation cavity (2) and the bottom water tray (1). The antenna achieves pattern deflection of + -35 DEG, + -15 DEG and 0 deg. Meanwhile, the high transparency realizes a certain stealth effect, and has a certain research value in marine communication.
2. 2. The pattern reconfigurable liquid transparent antenna for marine communication according to claim 1, wherein the top hexagonal star-shaped radiating cavity (2) is divided into seven parts, and is respectively composed of a middle regular hexagonal radiating cavity (2) and six regular triangular radiating cavities (2). The switching of the directional patterns is realized by injecting distilled water into different cavities. The length of the outer side of the regular hexagonal radiation cavity is 37mm, the height is 10mm, the side length of the inner cavity is 34.5mm, and the height is 5.2mm.
3. 3. A pattern reconfigurable liquid transparent antenna for use in marine communications according to claim 1 wherein said inverted L feed structure (3) is made of copper, passing through the bottom water tray (1) and into the air layer between the two layers. The vertical part of the probe is 28mm in height, and the transverse part is 16mm in length. The feeding position is selected to be 46.25mm away from the center of the bottom water tray.
4. 4. The pattern reconfigurable liquid transparent antenna for marine communication according to claim 1, wherein said chassis (1) is realized by injecting distilled water. The outer radius of the chassis is 65mm, the radius of the inner cavity is 61mm, the height is 7mm, and the height of the inner cavity is 2.8mm. After water is injected into the cavity structure, the reflecting effect is realized.
5. 5. A pattern reconfigurable liquid transparent antenna for marine communications according to claim 1 wherein six cylinders support upper and lower portions. The radius of the bottom of the cylinder is 3mm, and the height is 19mm. Meanwhile, 19mm is the height of an air layer between the top hexagonal star-shaped radiation cavity (2) and the bottom water tray (1).
6. 6. The pattern reconfigurable liquid transparent antenna for ocean communication of claim 1, wherein the pattern reconfigurable liquid transparent antenna is formed by 3D printing of transparent resin except for a feed part, so that transparentization is realized, and the whole antenna has a certain stealth effect.

Description

Directional diagram reconfigurable liquid transparent antenna applied to ocean communication Technical Field The invention belongs to the technical field of antennas, and particularly relates to a pattern reconfigurable liquid transparent antenna applied to marine communication. Background The antenna is an important radio frequency front end component in the fields of microwave wireless energy transmission, wireless communication and the like, and is used for receiving and radiating electromagnetic waves and realizing conversion between the electromagnetic waves and guided waves. With the rapid development of technology, the requirements on transmission rate and communication capacity in the current communication system are increasing, so that the antenna has the capability of coping with complex situations. The reconfigurable antenna is realized by changing the antenna function under the condition of not changing the antenna structure. Second, the pattern is an important indicator in the antenna design process. In modern complex communication environments, flexible switching of radiation directions is particularly important. The directional diagram reconfigurable antenna realizes the transformation of the antenna direction on the basis of not changing the structure of the antenna, and becomes a hot topic of current research. The transparent liquid antenna with the reconfigurable pattern by loading distilled water ensures that the whole antenna has a certain stealth effect. The document A Novel Pattern Reconfigurable Antenna Based On Liquid Metal proposes a new coaxial feed mode reconfigurable antenna based on liquid metal. The antenna state can be switched by injecting liquid metal into different shells, so that 4 radiation states, namely a +z-axis beam state, a conical omni-directional beam state and two directional beam states, are excited. In addition, the antenna has a simple structure, and does not need the assistance of other complex feed source structures or parasitic structures. The document A Radiation Pattern Reconfigurable Fabry-P rot Antenna Based on Liquid Metal proposes a novel beam-steering fabry-perot (FP) antenna using a liquid metal Partially Reflective Surface (PRS). PRSs can be divided into three different liquid metal filled regions. By injecting liquid metal into a specific area, the beam direction of the antenna and the beam width of 3 dB can be controlled respectively, and a simple control method is provided for the radiation mode reconfigurable FP antenna. The document Frequency AND PATTERN Reconfigurable Antenna Using Double LAYER PETAL SHAPED PARASITIC Structure proposes a Frequency and mode reconfigurable antenna employing a double-layer petal-shaped parasitic Structure and carrying a PIN diode. Its double-layer parasitic structure makes it possible to implement a mode reconfigurable function over a wider frequency range. The operating frequency of the antenna is continuously tunable and the radiation pattern is controllable, scanning from 0 ° to 360 ° in units of 25.7 °. Therefore, with the above technical background and the literature description, the present invention aims to provide a pattern reconfigurable liquid transparent antenna applied to marine communication. Disclosure of Invention Aiming at the specific requirements of the wireless communication system and the microwave wireless energy transmission field on an antenna, the invention aims to provide a pattern reconfigurable liquid transparent antenna applied to marine communication. Six transparent columns are used for connecting the hexagonal star-shaped radiation cavity and the bottom water tray, and the inverted L-shaped feed probe penetrates through the bottom water tray and is positioned in an air layer between the hexagonal star-shaped radiation cavity and the bottom water tray. By injecting distilled water into different parts of the hexagonal star-shaped cavity, the antenna achieves pattern deflection of +/-35 degrees, +/-15 degrees and 0 degrees. Meanwhile, the high transparency realizes a certain stealth effect, and has a certain research value in marine communication. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: for the target angle, a hexagonal star-shaped radiation cavity is designed, and the cavity consists of seven parts, namely a regular hexagonal radiation cavity and six regular triangle radiation cavities. The electric field is changed by injecting water into different cavities, and then the radiation direction is switched. Further, the bottom circular chassis is filled with distilled water to the middle cavity to form the water chassis. The reflection effect is achieved by being located at a position 19mm away from the top hexagonal star-shaped radiation cavity. Further, the inverted L-shaped feed probe is positioned in an air layer between the hexagonal star-shaped radiation cavity and the bottom water plate through the bottom water plate as