Abstract
Two improved designs of wideband dual polarization antennas for base station. The first design is the crossed dipoles for the frequency bands 1695–2695 MHz. The presented shape of crossed dipole provides a low level of crosspolarization, VSWR better than 1.4, the isolation between polarizations is better than –33 dB and the beam width in the horizontal plane is 65±4 degrees. The second design is the square dipole in the frequency range 690–960 MHz provides the beam width in the horizontal plane 60±5 degrees, E-plane 58±3 degrees, H-plane 64±3 degrees, the isolation between polarizations better than –35dB.
Highlights
In these days of high mobile phone usage, market needs huge quantity of wideband dual polarized antennas each year considerable work has been done in this field to create such antennas which are easy to be manufactured
Crossed dipoles supported by a balun are the simplest dual polarized antennas hundreds of such antennas were invented to extend its frequency band and decrease cost of manufacturing, due to the constant growth in the weight and size requirements of base station antennas, this issue remains relevant
The radiating arrangement containing four dipoles placed above a reflective conductive plate and arranged in a shape of a dipole square
Summary
In these days of high mobile phone usage, market needs huge quantity of wideband dual polarized antennas each year considerable work has been done in this field to create such antennas which are easy to be manufactured. The most of antennas for base station have to provide 65 degree beam width, good cross polarization discrimination and matching with feeding cables through wide frequency band. Crossed dipoles supported by a balun are the simplest dual polarized antennas hundreds of such antennas were invented to extend its frequency band and decrease cost of manufacturing, due to the constant growth in the weight and size requirements of base station antennas, this issue remains relevant. One radiator of this kind described in [1]. The present paper is devoted to research and improvement a wideband directional antenna radiating two linear polarizations and having better cross polarization discrimination and matching with feeding line through a wide frequency band than known antennas, providing less unwanted coupling between neighbor antennas of antenna array for single- and multi-band systems
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