4G LTE broadband omnidirectional antenna and bandwidth adjusting method thereof

Abstract

The invention provides a 4G LTE broadband omnidirectional antenna and a bandwidth adjusting method thereof. The 4G LTE broadband omnidirectional antenna comprises a metal floor, a dielectric substrate and a feed SMA, a circular metal patch which is concentrically welded with a center probe of the feed SMA is arranged on the surface of one side, far away from the metal floor, of the dielectric substrate, and an upper arc-shaped microstrip line is arranged in the circumferential direction of the circular patch; and an annular metal patch is arranged on the surface of the other side of the dielectric substrate, the annular metal patch and a center probe of the feed SMA are concentrically arranged, a lower arc-shaped microstrip line is arranged in the circumferential direction of the annular metal patch, the lower arc-shaped microstrip line and the annular metal patch are connected through a connecting branch knot, and the lower arc-shaped microstrip line is spaced from the dielectric substrate and corresponds to the upper arc-shaped microstrip line in position. The plurality of equivalent inductors and equivalent capacitors respectively form two resonance points, the resonance frequencies of the two resonance frequency points can be tuned independently, and the magnitude of the resonance frequencies can be controlled by adjusting the physical structure parameters of the antenna, so that the two resonance frequencies are located at the low end and the high end of a passband respectively, and the target bandwidth is covered.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a 4G LTE omnidirectional antenna. Background technique [0002] With the rapid development of information technology, the data traffic of wireless communication has increased sharply, which also puts forward higher requirements for wireless base stations. Antennas, as devices for transmitting and receiving radio signals, play a pivotal role in wireless communication systems. [0003] On the one hand, the base station antenna needs to be able to cover a sufficiently large impedance bandwidth. For example, 1.7-2.7GHz contains many common frequency bands, such as DCS1800 (1710-1880MHz), PCS1900 (1850-1990MHz), UMTS (1920-2170MHz), LTE2300 (2305MHz -2400MHz), LTE2500 (2500-2690MHz), etc., use multiple antennas or frequency reconfigurable antennas to cover these frequency bands, which will inevitably lead to problems such as coupling or parasitic, increasing the complexity of the sys...

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Problems solved by technology

[0003] On the one hand, the base station antenna needs to be able to cover a sufficiently large impedance bandwidth, for example, 1.7-2.7GHz contains many common frequency bands, such as DCS1800 (1710-1880MHz), PCS1900 (1850-1990MHz), UMTS (1920-2170MHz), LTE2300 (2305MHz -2400MHz), LTE2500 (2500-2690MHz), etc., use multiple antennas or frequency reconfigurable antennas to cover these frequency bands, which will inevitably lead to problems such as coupling or parasitic, increasing the complexity of the system, and one can cover these frequency bands at the same time The antenna is obviously a better solution

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