CPW feed high-isolation two-stop-band MIMO antenna

Abstract

The invention relates to a CPW feed high-isolation two-stop-band MIMO antenna. The antenna comprises a substrate, an antenna and a grounding plate, and is characterized in that the antenna comprises two radiation units; a circular monopole UWB antenna is contained in each radiation unit; the two circular monopole UWB antennas are perpendicular to each other; and the circular monopole UWB antennascorrode an SRR groove. Compared with the prior art, the antenna adopts a coplanar waveguide feed mode, so that the dispersion effect can be reduced; the antenna is simple to manufacture and compact instructure, a winding, a via hole and a corresponding parasitic source inductor are omitted, so that radiation loss caused by surface waves is reduced, and antenna gain is increased; high isolation and notch characteristics are realized; by adopting the FR4 material with economical efficiency, the antenna is small in size; and the whole antenna is simple in structure and easy to process.

Description

technical field [0001] The invention relates to a wireless communication antenna, in particular to a CPW feeding high-isolation double-stop-band MIMO antenna. Background technique [0002] The U.S. Federal Communications Commission (FCC) approved the 3.1-10.6GHz frequency band in 2002 as an ultra-wideband (UWB) working frequency band, although it has rich spectrum resources, strong anti-interference performance, high transmission rate and confidentiality, etc. There are many advantages, but there are two serious defects that limit its development. One is to avoid the UWB system’s signal interference with other systems that share part of the frequency band, its power is limited to a very low level; the other is that the UWB channel is a high-frequency selective fading channel, the channel generally includes With hundreds of paths, the maximum path delay can reach hundreds of nanoseconds. If the symbol time is too short, the intersymbol interference will be very serious, whic...

AI Technical Summary

Problems solved by technology

The function of filtering the target frequency band can be effectively achieved by adding stubs, but the introduction of stubs will inevitably lead to an increase in the overall size of the antenna, especially when the stubs are introduced into the MIMO antenna, it is easy to cause "two Sub-coupling" interferes with the independence of the MIMO antenna unit's work; while a certain length of gap is embedded in the MIMO antenna floor, which destroys the symmetry of the antenna structure, which easily causes the distortion of the high-frequency part of the antenna pattern and affects its radiation performance.

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