Generating the orbital angular momentum of radio frequency signals using optical-true-time-delay unit based on optical spectrum processor.
A system for generating radio frequency signals with orbital angular momentum (OAM) is proposed and certificated for the first time, which employs an array of multiple optical-true-time-delay elements and circular antennas array (CAAs). A constructive Fourier series theory about CAAs collectively forming an OAM radio beam is demonstrated. An optical spectrum processor offers the four lines high-resolution time delay by adding a series of linear optical phase shifts. The OAM radio beam with topological charge L=1 is produced and measured successfully.
Xinlu
X
Gao
Shanguo
S
Huang
Yunlong
Y
Song
Shangyuan
S
Li
Yongfeng
Y
Wei
Jing
J
Zhou
Xiaoping
X
Zheng
Hanyi
H
Zhang
Wanyi
W
Gu