Dipole antenna using three-dimensional photonic crystal as reflecting substrate

Abstract

The invention discloses a dipole antenna using a three-dimensional photonic crystal as a reflecting substrate. The dipole antenna comprises a dipole antenna, a dipole, an SMA coaxial line conversion head and the three-dimensional photonic crystal, wherein the dipole antenna comprises two copper guide rods, the two copper guide rods are fixed on an insulator at intervals, the dipole uses the SMA coaxial line conversion head as a feeding interface, in the dipole using a fine copper wire as an antenna, one end of each of two segments of fine copper wires is welded on a central pin and an outer wall of the SMA coaxial line conversion head, the other end of the two segments of the fine copper wires are respectively welded with the two copper guide rods of the dipole antenna, the three-dimensional photonic crystal is used as the reflecting substrate and is arranged aside the dipole antenna, and the three-dimensional photonic crystal has a spherical diamond negative-type photonic crystal structure. In the dipole antenna, the three-dimensional photonic crystal is used as the reflecting substrate, an electromagnetic wave of a frequency point is substantially reflected, the reflecting energy to a free space is increased, thus, the radiating gain of the antenna is improved, and the dipole antenna plays an important role in the communication field.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a dipole antenna. Background technique [0002] Photonic crystals are artificial crystals whose dielectric constants are arranged periodically. The basic properties include photonic bandgap characteristics, photonic localization and some unique optical characteristics. Among them, the photonic band gap is its most fundamental characteristic, which means that when the frequency falls in the band gap, the incident light will be totally reflected, so that it cannot pass through the photonic crystal. Utilizing this characteristic, photonic crystals can be used to suppress unwanted spontaneous radiation, thereby efficiently controlling the transmission of electromagnetic wave signals and reducing energy loss during transmission. Photonic crystals are divided into three categories according to the spatial dimension in which the refractive index changes periodically, namely one-d...

AI Technical Summary

Problems solved by technology

[0003] The traditional dipole antenna mainly uses a two-dimensional photonic crystal structure, which is simple in structure and easy to manufacture, but the radiation efficiency is not high

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