Omni-directional ceiling antenna

Abstract

The invention discloses an omni-directional ceiling antenna. The omni-directional ceiling antenna comprises a cone column-shaped radiation oscillator, a cone column-shaped reflector, a plate column-shaped bottom plate and an insulating medium ring, wherein the reflector comprises a first hollow cone and a first cylindrical ring, the flared end of the first hollow cone is connected with the first cylindrical ring, and the outer diameter of the first cylindrical ring is less than that of the first hollow cone; the bottom plate is provided with a second cylindrical ring, and the second cylindrical ring and the first cylindrical ring are connected in a sleeve mode to form a space isolating coupling structure; an insulating medium ring is arranged between the second cylindrical ring and the first cylindrical ring to separate the reflector from the bottom plate and support and fix the reflector and the bottom plate. The omni-directional ceiling antenna solves the problem that high-frequency signals of an ultra-wide-band indoor omni-directional antenna are gathered downward, enables the effective cover range of high-frequency signals to be expanded, enables indoor signals to be distributed more uniformly, enables the electromagnetic radiation intensity under the antenna to be lowered effectively and enables the indoor electromagnetic environment safety to be guaranteed.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to an omnidirectional ceiling antenna. Background technique [0002] Mobile communication indoor omnidirectional ceiling antennas are widely used in indoor distribution systems. They are the main type of antennas used for indoor wireless signal coverage. Their performance and quality directly affect the quality of indoor wireless communication and the investment efficiency of indoor distribution systems. Omnidirectional ceiling antennas generally use the half-wave vibrator principle, using a conical vibrator plus reflector structure. The conical vibrator can widen the impedance broadband of the antenna. The existing omnidirectional ceiling antenna in China usually connects the impedance matching line (piece) between the radiating vibrator and the reflective floor to reduce the volume and further expand the bandwidth of the low-end frequency to meet the requirements of 806 The requ...

AI Technical Summary

Problems solved by technology

[0004] However, with the deployment of higher frequency networks such as LTE / 4G, the omnidirectional ceiling antenna improved by the above technology does not consider the problem of downward aggregation of higher frequency signals such as LTE / 4G, and the maximum gain direction for frequencies above 2500MHz is about 60°. The gain attenuation in the 85° direction reaches about 2dB, and the downward signal aggregation is still very obvious, so that the coverage efficiency of LTE / 4G and other higher frequency signals is still low, and the radiation intensity under the antenna is still high

Images