An Omnidirectional Circularly Polarized Antenna for Handheld Terminals

Abstract

The invention discloses an omnibearing circularly-polarized antenna of a handheld terminal. The antenna comprises a floor plate, dielectric substrates arranged on the floor plate, an inverted-F antenna and a monopole antenna which are both arranged on the dielectric substrates, wherein the plurality of dielectric substrates are sequentially connected on the floor plate to form a closed enclosure frame, and the inverted-F antenna and the monopole antenna are respectively arranged at the corners of the two dielectric substrates, and the inverted-F antenna and the monopole antenna are mutually connected, and a feed interface is arranged at the joint of the inverted-F antenna and the monopole antenna. According to the invention, the application of the antenna on the handheld terminal can be effectively realized, and the problems of miniaturization and the like are solved.

Description

technical field [0001] The present invention relates to the technical field of antennas, in particular to an omnidirectional circularly polarized antenna for a handheld terminal. Background technique [0002] With the comprehensive advancement of wireless communication technologies represented by 5G and the Internet of Things, especially the popularity of mobile terminals such as handheld terminals, there is an urgent need for high-quality small antenna components that are compact and easy to integrate. As an important branch of circularly polarized antennas, omnidirectional circularly polarized antennas are widely used in mobile communications, satellite communications, remote sensing, and electronic countermeasures due to their omnidirectional radiation and circular polarization characteristics. [0003] Currently commonly used omnidirectional circularly polarized antennas can be roughly divided into omnidirectional circularly polarized antennas based on arrays of directio...

AI Technical Summary

Problems solved by technology

[0004] As far as the commonly used omnidirectional circularly polarized antenna based on the array of directional circularly polarized elements is concerned, the antenna is essentially a circularly polarized array antenna. First, the bandwidth and axial ratio performance of the omnidirectional antenna are limited by the element antenna. After the array, there may be problems such as narrow antenna bandwidth and deterioration of circular polarization performance; secondly, the construction of the array has disadvantages such as large size and volume

[0005] As far as the commonly used omnidirectional circularly polarized antenna based on the array of omnidirectional radiation linear polarization units is concerned, the antenna is an array of omnidirectional antennas. degree), a circular array is constructed, which has disadvantages such as large size and volume; secondly, the structure of the antenna can be equivalent to a combination of electric dipole and magnetic dipole, which requires a specific feeding method, so there is a feed Disadvantages such as complex structure and poor antenna return loss

[0006] As far as the commonly used omnidirectional circularly polarized antenna based on the zero-order resonant antenna is concerned, the antenna mainly relies on the zero-order resonance and the radiation effect of the support arm. Due to the influence of the resonance effect, there are shortcomings such as narrow operating bandwidth of the antenna; The antenna still has disadvantages such as complex structure, large size, and difficulty in integrating with the terminal

[0007] As far as the commonly used circular polarizer-omnidirectional antenna is concerned, the antenna is essentially a combination of a circular polarizer and an omnidirectional antenna, which has the disadvantages of complex structure, large size, and difficulty in miniaturization. question

[0008] To sum up, the currently commonly used omnidirectional circularly polarized antennas are limited by their implementation principles and structures, and all have common shortcomings and problems such as large size, difficulty in miniaturization, and difficulty in integrating with handheld terminals, and some antennas have processing Disadvantages such as difficulty and narrow antenna working bandwidth

Images