Ultra-small circularly polarized antenna based on electromagnetic ultra-resonator

Abstract

The invention discloses an ultra-small circularly polarized antenna based on an electromagnetic ultra-resonator, the antenna comprises a dielectric substrate and a metal floor, and is characterized inthat a plurality of laminated capacitors, a feed device and a metal loop connecting end are formed on the dielectric substrate; first electrodes of the laminated capacitor are electrically connectedwith one another to form a first common electrode of the laminated capacitor; the feeding device is connected to the first common electrode of the laminated capacitor, and the metal loop connecting end is arranged on the second electrode of each laminated capacitor; each metal loop connecting end is electrically connected with one end of a metal column, and the other end of each metal column is electrically connected with the metal floor; and the metal floor, the metal column and the laminated capacitor which are electrically connected form a super-resonator current loop. By adjusting the length of the laminated capacitor and the length of the metal loop, large equivalent capacitance and equivalent inductance are constructed, small resonant frequency is obtained, and ultra-small antenna design is achieved.

Description

technical field [0001] The invention belongs to the technical field of radio frequency antennas, relates to the technical field of small circularly polarized antennas, in particular to an ultra-small circularly polarized antenna based on an electromagnetic superresonator. Background technique [0002] With the advancement of miniaturization of electronic equipment, the problem of antenna size becomes more and more prominent, and there is an urgent need to develop miniaturized antennas with high performance. As an important branch of antennas, circularly polarized antennas are widely used in mobile communications, satellite communications, and electronic countermeasures. [0003] At present, the circularly polarized antennas commonly used in miniaturized electronic equipment can be roughly divided into orthogonal dipole pair circularly polarized antennas and microstrip circularly polarized antennas according to the antenna structure. Orthogonal dipole pair circularly polariz...

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Problems solved by technology

This type of antenna is limited by the height requirements of the dipole structure and the reflective floor, and has disadvantages such as large antenna volume; at the same time, it is limited by the gain of a single dipole antenna, and the overall gain of the antenna is not high; in the existing design Among them, in order to realize the fixation of the antenna, etc., the dielectric substrate is often used as a support, which introduces dielectric loss and increases the production cost.

[0005] As far as the commonly used microstrip circularly polarized antenna is concerned, due to the limitations of the structure and principle of the microstrip antenna, there are shortcomings such as narrow antenna bandwidth; for the microstrip patch antenna that uses a dielectric for miniaturization design, dielectric loss will be introduced , to reduce the antenna gain; for the microstrip circular polarization scheme of double-feed and multi-feed points, it is necessary to build a feed network, which has disadvantages such as large size

[0006] In summary, currently commonly used orthogonal dipole pair antennas are limited by their own performance and the principle of circular polarization, and have disadvantages such as large physical size, limited gain, and difficulty in miniaturization; microstrip circularly polarized antennas are limited For microstrip antenna elements, there are disadvantages such as narrow antenna working bandwidth and insufficient gain

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