omnidirectional ceiling antenna

Abstract

The present invention provides an omnidirectional ceiling antenna, which includes a cone-shaped radiating oscillator, a cone-shaped reflector, a disc-shaped bottom plate, and an insulating dielectric ring; wherein the reflector includes a first hollow cone and a first cylindrical ring , the flared end of the first hollow cone is connected to the first cylindrical ring, and the outer diameter of the first cylindrical ring is smaller than the outer diameter of the flared end of the first hollow cone; a second cylindrical ring is arranged on the bottom plate, and the second cylindrical ring is connected to the first cylindrical ring. The cylindrical rings are socketed to form a space-isolated coupling structure; the insulating dielectric ring is arranged between the second cylindrical ring and the first cylindrical ring to realize isolation and support and fixation between the reflector and the bottom plate. The invention solves the problem that the high-frequency signal of the ultra-broadband indoor omnidirectional antenna gathers downward, not only expands the effective coverage of the high-frequency signal, makes the indoor signal distribution more uniform, but also effectively reduces the electromagnetic radiation intensity under the antenna, ensuring indoor Safety in the electromagnetic environment.

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...

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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

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