Low-frequency integrated double-polarization folded antenna oscillator

Abstract

The invention belongs to the field of a mobile communication base station antenna, and particularly relates to a low-frequency integrated double-polarization folded antenna oscillator. The low-frequency integrated double-polarization folded antenna oscillator comprises four groups of compensating half-wave folded oscillators, wherein each group of compensating half-wave folded oscillator is connected to a docking platform through the bottom of an oscillator arm to form a whole integrated double-polarization folded oscillator; the horizontal parts of the four groups of compensating half-wave folded oscillators are connected through isolation connecting blocks to form rectangular four sides; and the compensating half-wave folded oscillators on each group of opposite sides in the rectangular four sides form a polarization-direction radiating element combination. An oscillator feed mode is that a feed-through and a support arm form coplanar waveguide mode feed, the gap space between the feed-through and the support arm and the sectional dimension are changed to regulate the input impedance characteristic of the oscillator, and then the match with a feed network is realized. The low-frequency integrated double-polarization folded antenna oscillator has the advantages of simplicity in manufacture, stable structure and high radiating efficiency.

Description

technical field [0001] The invention belongs to the field of mobile communication base station antennas, and relates to an antenna vibrator, in particular to a low-frequency integrated dual-polarization folded antenna vibrator. Background technique [0002] The vibrator, also known as the radiation unit, is the core part of the base station antenna. Most linearly polarized antennas use half-wave symmetric elements. The principle is to use the deformation of two-wire transmission in the transmission line theory to open the angle between the two wires to 180 degrees. The arm length is equivalent to the half-wavelength of the center frequency point of the frequency band used. Therefore, called a half-wave oscillator. Most of the existing dual-polarized antennas use orthogonal oscillators, and the structure mostly adopts the bent and upright form of sheet metal. [0003] Due to the needs of dual-polarized antennas, the isolation between the two polarizations of the half-wave o...

AI Technical Summary

Problems solved by technology

[0003] Due to the needs of dual-polarized antennas, the isolation between the two polarizations of the half-wave oscillators in the form of sheet metal bending and vertical orthogonality is poor. The mutual coupling is large; the second is that the strength of the sheet metal bending vibrator cannot meet the requirements of the vibration test, resulting in structural instability and reducing the polarization purity

The cross-polarization ratio performance also becomes unstable

In addition, the height of the orthogonal vertical oscillator is limited by the frequency, generally about a quarter of the wavelength, so at low frequencies, the oscillator is easy to be very high, which seriously restricts the advancement of antenna miniaturization

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