Abstract
This paper describes a broadband printed cross-dipole element with four polarization reconfigurations (BPCDE_PR). The BPCDE_PR can configure two linear and two circular polarizations in the operating band of 1.7–2.5 GHz. To implement the broadband polarization reconfigurations, switched network type broadband phase shifters are proposed and designed. The fabricated BPCDE_PR prototype with switched network including broadband phase shifters shows good electrical performances and the desired polarization reconfigurable functions in the operating band.
Highlights
In wireless mobile communication systems, base stations or repeater antennas are essential for their role in making a wireless signal path connection with wireless terminals
In the future, various wireless services will gradually converge to the use of a single wireless multimode terminal that can give multimode functions operating according to a selected service or frequency band
Two outputs of the broadband feed network for polarization reconfiguration (BFN PR) were connected with the cross-dipole element through two short coaxial lines with the same electrical length
Summary
In wireless mobile communication systems, base stations or repeater antennas are essential for their role in making a wireless signal path connection with wireless terminals In conventional technology, they are usually designed for single-mode operation that radiates mainly linear polarization. A switchable property in polarization or frequency can allow the user to access any existing network In this regard, it is desirable that base stations or repeater antennas provide multimode functions to reconfigure polarization and/or frequency. A new broadband printed cross-dipole (CDP) element with four polarization reconfigurations (BPCDE PR) is proposed to improve the operating bandwidth. It is designed in the operating band of 1.7–2.5 GHz (about 40% in fractional bandwidth). The proposed antenna can be used as an array element in broadband base stations or repeater antennas, or broadband terminal antennas because of its broadband characteristics and polarization reconfigurability
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