Frequency reconfigurable liquid medium resonant antenna

Abstract

The invention discloses a frequency reconfigurable liquid medium resonant antenna which comprises a liquid dielectric resonator and a ground plate. The main radiating element of the antenna is the liquid dielectric resonator composed of a transparent cuboid liquid container and pure water. The liquid container is evenly divided into a number of intervals. The size of the liquid medium resonator can be changed by adding pure water at a specific interval. The resonant frequency of the liquid resonator can be reconstructed. In addition, the liquid height in each interval is also adjustable. The operating frequency of the liquid resonant antenna can be further adjusted under different liquid interval combinations. According to the invention, liquid medium resonance structures of various sizescan be formed in the same structure without using an active device and a matching circuit; compact antenna scale, high radiation efficiency and wide frequency band coverage are realized; and the design can be widely used in various applications in the field of wireless communications.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a liquid medium resonant antenna. Background technique [0002] With the development of wireless communication systems in the direction of large-capacity, multi-function, and ultra-wideband, the system also puts forward higher requirements for antennas, not only requiring small antenna size and wide frequency bandwidth, but also requiring high antenna gain, low cost, and high radar cross-section Small. Traditional metal antennas are difficult to meet the requirements of the system. Therefore, the research on new antennas with application prospects is particularly urgent. Among the new antennas, liquid antennas have attracted extensive attention from scholars at home and abroad in recent years due to their advantages such as flexible structure, strong reconfigurability, low cost, and wide application range. [0003] Pure water (also known as distilled water) is a liquid medium ...

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Problems solved by technology

[0004] The design of pure water dielectric resonant antennas currently faces two problems: 1) The pure water antenna has a high quality factor (Quality Factor, Q) and the bandwidth of the antenna is narrow, which limits the application of some broadband; 2) The flow of pure water Various advantages such as stability and transparency have not been fully utilized. Water is a liquid material suitable for reconfigurable liquid antennas. On the basis of not relying on external active devices, it can form some structures that are relatively complex and difficult to form solid materials. The a

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