Sub-wavelength antenna array with defected ground structure for time reversal communication

Abstract

The invention discloses a sub-wavelength antenna array with a defected ground structure for time reversal communication, belonging to the technical field of wireless communication. The sub-wavelength antenna array is formed by stacking a plurality of same antenna units, and the distance between two adjacent unit antennae is smaller than 1 / 2 working wavelength lambda. A metal patch in the front ofa medium substrate comprises radiating units in the shape of a concentric rectangular ring cluster. In the concentric rectangular ring cluster, the perimeter of the maximum rectangular ring is lambda / 10:lambda / 5, the perimeters of other rectangular rings are sequentially shortened inwards in a proportion of 25%, and centers of any two adjacent sides are connected by adopting a microstrip line with the line width of lambda / 100:lambda / 50. The radiating units carry out feeding by adopting a microstrip line with the characteristic impedance of 50 ohms. A metal patch at the back of the medium substrate is a metal floor in which 35 crescent holes are etched uniformly. The sub-wavelength antenna array disclosed by the invention is applied to a time domain mobile communication terminal of time reversal, all channels of the antenna units are relatively independent and have small cross coupling, the interference between adjacent channels is extremely low, and the sub-wavelength antenna array can support higher data transmission ratio and frequency spectrum utilization ratio.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to an antenna array whose spacing between antenna elements works at a sub-wavelength, and in particular to a time-reversal sub-wavelength antenna array for a wireless mobile terminal. Background technique [0002] Improving the communication capacity and communication rate of the mobile communication system is the goal pursued by mobile communication. With the continuous growth of personal service requirements, mobile terminals are faced with a huge demand for urgent improvement in communication capacity and communication rate. Designing multiple antenna units on the mobile terminal and increasing the number of independent wireless channels is one of the main means for future mobile communications to improve the communication performance of mobile terminals [0003] According to the traditional theory, in order to make the multi-antenna system obtain good space diversi...

AI Technical Summary

Problems solved by technology

If the distance between the antenna units is much smaller than half the working wavelength in a limited space, the coupling between the units will increase, and the correlation of the wireless channels corresponding to each antenna will be greatly improved, resulting in a significant reduction in the communication capacity and communication rate of the mobile terminal system. , seriously impairs the communication quality, thus losing the meaning of introducing a multi-antenna system

Although people have done a lot of research on the miniaturization of antenna units, due to the limited size of the mobile terminal platform, integrating multiple antennas for different channels on the mobile terminal still takes up a lot of space

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