A Distributed Multipoint Feed Broadband Vertically Polarized Omnidirectional Antenna

Abstract

The invention relates to a distributed multi-point feeding broadband vertically polarized omnidirectional antenna, which belongs to the technical field of antennas. Including, a dielectric cavity composed of four identical radiating substrates, the dielectric cavity is placed vertically on the metal base plate, and the antenna radiator part is printed on the surface of the dielectric cavity; a feeder for multi-point feed The substrate, the feed substrate is placed parallel to the metal base plate and placed inside the dielectric cavity, the upper surface of the feed substrate is printed with an equal-power microstrip matching circuit for feeding the antenna radiator part; a metal base plate , the dielectric cavity and the feeder substrate are both on the upper surface of the metal bottom plate; a radio frequency joint, the inner core of the radio frequency joint is connected with the center of the equal power distribution microstrip matching circuit. The antenna of the present invention realizes the broadband and omnidirectional characteristics of the vertically polarized antenna at the same time, and the antenna is easy to be integrated with other antennas to realize the integration and miniaturization of multiple antennas.

Description

technical field [0001] The invention belongs to the technical field of antennas, and specifically relates to a distributed multi-point feed broadband vertically polarized omnidirectional antenna, which can be used for integration with other antennas, and can form multi-frequency bands or multi-poles without increasing the overall size of the antenna. Miniaturized antennas, thereby realizing the integration and miniaturization of multiple antennas. Background technique [0002] The vertically polarized antenna is usually implemented by a monopole antenna. The monopole is composed of one arm of the symmetrical oscillator and the metal floor instead of one arm of the symmetrical oscillator. The monopole achieves the same horizontal omnidirectional radiation performance as the symmetrical oscillator with only half the height of the symmetrical oscillator. The impedance bandwidth of the traditional monopole is relatively narrow. In order to increase the impedance bandwidth of th...

AI Technical Summary

Problems solved by technology

The impedance bandwidth of the traditional monopole is relatively narrow. In order to increase the impedance bandwidth of the antenna, the monopole is usually deformed and designed, such as different shapes of sheet structures, loading parasitic radiation structures, improving the floor structure, adding microstrip matching circuits and other technical means Broaden the Impedance Bandwidth of Monopoles

However, while increasing the impedance bandwidth of the monopole, the stability of the antenna radiation pattern will be significantly deteriorated by the influence of the metal floor. Gain pointing will be biased towards low elevation angles and the beam will be narrowed

Images