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Formation of OAM Beams by Circular Polarization Ceramic Antenna Array
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Orbital angular momentum (OAM) beams can be generated at various microwave frequencies through using antenna array. However, the intricacy of system and incapacity to transmit over long distances limit the applications of OAM beams in radio domain. Here, a significantly simplified global positioning system (GPS) ceramic antenna array is employed to generate OAM beams without the help of phase shifting devices. Simulation of the GPS ceramic antenna array proves that the OAM beams with the mode of ±1 show small divergence angle and very standard spiral phase delivery. To test the transmission competence of the proposed antenna array, a measurement system which can detect the One-dimension spatial delivery of electromagnetic characteristic for the OAM beams is set up. Even considering the vast loss in cables and power divider, the receiving antenna still can receive the electromagnetic characteristic of the OAM beams at a place more than 2 m away from the antenna array. Experimental results presented in this paper demonstrate the excellent presentation of the OAM beams when generated with the proposed ceramic antenna array formation.
Title: Formation of OAM Beams by Circular Polarization Ceramic Antenna Array
Description:
Orbital angular momentum (OAM) beams can be generated at various microwave frequencies through using antenna array.
However, the intricacy of system and incapacity to transmit over long distances limit the applications of OAM beams in radio domain.
Here, a significantly simplified global positioning system (GPS) ceramic antenna array is employed to generate OAM beams without the help of phase shifting devices.
Simulation of the GPS ceramic antenna array proves that the OAM beams with the mode of ±1 show small divergence angle and very standard spiral phase delivery.
To test the transmission competence of the proposed antenna array, a measurement system which can detect the One-dimension spatial delivery of electromagnetic characteristic for the OAM beams is set up.
Even considering the vast loss in cables and power divider, the receiving antenna still can receive the electromagnetic characteristic of the OAM beams at a place more than 2 m away from the antenna array.
Experimental results presented in this paper demonstrate the excellent presentation of the OAM beams when generated with the proposed ceramic antenna array formation.
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