Abstract
In this paper, a water antenna has been designed to generate tunable orbital angular momentum (OAM) vortex wave. With a revisiting theoretical analysis about radiation characteristic of the shorted ring patch fed by two probes, a frequency dependent single shorted ring water antenna is designed. With the increase of the operating frequency, the single-ring water antenna can radiate the OAM waves with the changeable modes. Furthermore, a dual shorted ring water antenna is proposed. With a tunable feeding network, the OAM waves with the reconfigurable modes including the l = 1, l = 2 and mixed modes can be radiated by adjusting ON/OFF states of the PIN diode. The prototype of the dual-ring water antenna is fabricated and measured. Good agreement between the simulation and the measurement demonstrates that the overlapped bandwidth for three states covers 2.35~2.55 GHz with a good mode purity.
Highlights
With rapid development of wireless communication system, improvement of spectral efficiency and system capacity has been facing serious challenges owing to the limited frequency spectrum
OPERATION MECHANISUM OF orbital angular momentum (OAM) VORTEX WAVE In order to demonstrate the operation mechanism of the proposed water antenna, we first studied the radiation performance of a shorted circular ring patch antenna with an inner radius a and an outer radius b, which is fed by a coaxial probe at (ρ0, 0) and fabricated on a substrate with permittivity of ε1 and thickness of h
In the State III, the OAM wave with the mixed mode is achieved in the frequency band of 2.35∼2.55 GHz
Summary
With rapid development of wireless communication system, improvement of spectral efficiency and system capacity has been facing serious challenges owing to the limited frequency spectrum. A water antenna has been proposed to generate the OAM vortex wave with the reconfigurable modes in a frequency band.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
