Micro-miniature terminal antenna based on composite right/left-handed transmission line

Abstract

The invention provides a composite left and right hand transmission wire-based ultra small terminal antenna, comprising a copper clad microwave dielectric substrate, components formed on upper and lower surfaces of the microwave dielectric substrate trough etching copper foil; wherein, the microwave dielectric substrate is composite left and right hand material; the upper surface component comprises N upper radiating patches, with N as an natural number not less than 1; the lower surface component comprises a lower floor and a small-size lower connecting floor with an area less than that of the upper radiating patch; the lower floor and the small-size lower connecting floor are connected through a lower connecting line; the upper radiating patch is communicated to the small-size lower connecting floor through a shortcut needle; the quantity of the upper radiating patch is identical with that of the small-size lower connecting floor, or the quantities are different. The advantage is as follows: the small-size lower connecting floor connected to the lower floor is applied to replacing the former whole floor in the invention, so as to obtain the ultra small terminal antenna; the upper surface component is provided with the mode of connecting piece further, so as to enhance electromagnetic coupling of the connecting line with the upper radiating patch on coplanar wave guide, so as to enhance operation band width of the antenna.

Description

technical field [0001] The invention relates to an antenna, in particular to an ultra-small mobile terminal antenna based on composite left and right hand transmission line technology. Background technique [0002] Left-handed materials (Left-Handed Metamaterials) is one of the research hotspots in the field of materials science and physics in recent years. When it comes to left-hand materials, we have to start with right-hand materials. In the classical electrodynamic theory, the electromagnetic properties of dielectric materials can be described by two macroscopic parameters, the permittivity ε and the magnetic permeability μ. The ε and μ of matter in nature are both positive numbers. When the electromagnetic wave passes through it, the three physical quantities describing the propagation characteristics of the electromagnetic wave, the electric field direction E, the magnetic field direction H and the propagation direction K of the electromagnetic wave, form a one-to-one...

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Problems solved by technology

[0003] Itoh et al. introduced an antenna design method based on composite left-handed transmission line technology in the literature and related literature. The geometric size of the antenna designed by this method can be reduced to less than one-twentieth of the wavelength. The fly in the ointment is that this Sievenpiper Antennas designed with a mushroom structure have a very small bandwidth (usually less than 1%), which is difficult to meet the requirements of most practical applications

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