Cup-shaped ultra-wideband planar monopole antenna with ground plate of stepped open-circuit structure

Abstract

The invention discloses a cup-shaped ultra-wideband planar monopole antenna with a ground plate of a stepped open-circuit structure. The cup-shaped ultra-wideband planar monopole antenna is composed of a dielectric substrate, a cup-shaped feed source terminal printed on the dielectric substrate, a coplanar waveguide feeder line, a ground plate of a stepped open-circuit structure and an externally-connected coaxial connector. The transverse size of the cup-shaped feed source terminal gradually decreases from top to bottom. Therefore, radiation bands with different frequencies are formed and theantenna has ultra-wideband characteristics. The ground plate of the stepped open-circuit structure is adopted, so that the resonance can be generated at the low-frequency position of the antenna. Thedesign size of the antenna is reduced. The upper end of the ground plate of the stepped open-circuit structure is of the stepped structure, so that the impedance matching can be further adjusted. A rectangular floor at the lower end of the ground plate of the stepped open-circuit structure is subjected to arc angle cutting treatment, so that the impedance bandwidth of the antenna can be further broadened. The working frequency band of the antenna is 2.9 GHz - 13 GHz, and the design size of the antenna is 20 mm*20 mm. The antenna is excellent in both radiation characteristic and gain characteristic and suitable for an ultra-wideband wireless communication system.

Description

technical field [0001] The invention relates to the technical field of wireless communication antennas, in particular to a cup-shaped ultra-wideband planar monopole antenna with a stepped open-circuit structure floor, which is suitable for ultra-wideband wireless communication systems. Background technique [0002] With the rapid development of wireless communication technology, the wireless communication system is required to have wider bandwidth and higher communication frequency, and the original communication frequency domain can no longer meet the demand. Ultra-wideband technology has the characteristics of large capacity and high speed, which can be used for short-distance large-capacity high-speed transmission and radar detection, and can effectively solve the contradictions and problems faced by modern communication systems. The planar antenna has the advantage of being easy to integrate and can meet the miniaturization requirements of the UWB communication system. ...

AI Technical Summary

Problems solved by technology

A wide impedance bandwidth can be obtained by using a rectangular slot, and the impedance matching can be optimized by adjusting the structure and size of the feed terminal. For example, non-patent document 1 discloses ultra-wideband antennas with rectangular slot circular feed, trapezoidal feed, and polygonal slot square feed. , the slot structure adopts a rectangular or polygonal slot structure, the feed unit adopts a circular or trapezoidal shape, and is fed through a coplanar waveguide. The impedance bandwidth of the three antennas covers the ultra-wideband frequency range, but the design size is 40mm×30mm, which is relatively large

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