Table 1 The main functions of each module in orbital angular momentum (OAM) on-off keying transmission system.
From: Orbital angular momentum detection device for vortex microwave photons
Module name | Function |
|---|---|
On-off keying control signal generator | Convert the user data into bit sequence, and select which branch works according to the bit 1 or 0. |
High-voltage power supply | Provide the high voltage in the cyclotron. |
Cyclotron | Generate the vortex microwave photons by the vortex electrons. |
Mode selector | Select the vortex microwave photons with mode 1, then feed the plane wave into the waveguide combiner. |
Plane wave signal source | Generate the sine signal for the plane wave. |
Power amplifier | Enhance the energy of the plane wave. |
Waveguide converter | Convert the plane wave from the rectangular to circular waveguide. |
Waveguide receiver | Receive the electromagnetic wave from the free space. |
OAM detection device | Transfer the OAM mode from the received microwave photons to the electrons, then detect the OAM mode by the diffraction pattern of the vortex electrons. |
Camera | Record the diffraction pattern of vortex electrons on the fluorescent screen. |
Information sequence identifier | Recover the user data by distinguishing the diffraction pattern recorded by the camera. |
