Beam reconstruction method, antenna, and microwave device

A beam reconstruction method for an antenna, wherein

• the antenna comprises:
• a feed;
• a liquid crystal metasurface array;
• a liquid crystal bias control circuit;
• and
• a beam transformation structure, wherein
• the liquid crystal metasurface array comprises a plurality of liquid crystal metasurface array units,
• the feed is configured to generate or receive a radio frequency signal,
• the liquid crystal bias control circuit is configured to:
• determine a to-be-adjusted beam angle, and
• load a voltage bias value on each liquid crystal metasurface array unit in the liquid crystal metasurface array based on the beam angle,
• the liquid crystal metasurface array is configured to:
• transmit the radio frequency signal, and
• generate a lateral offset of a feed phase center based on the voltage bias value, and the beam transformation structure is configured to
• emit the radio frequency signal generated from the feed and then transmitted through the liquid crystal metasurface array, or
• receive the radio frequency signal and then direct the radio frequency signal through the liquid crystal metasurface array to the feed,
• the method comprises:
• generating or receiving, by the feed, the radio frequency signal;
• determining, by the liquid crystal bias control circuit, the to-be-adjusted beam angle;
• loading, by the liquid crystal bias control circuit, the voltage bias value on each liquid crystal metasurface array unit in the liquid crystal metasurface array based on the beam angle, wherein the lateral offset of the feed phase center is generated based on the voltage bias value after the radio frequency signal is transmitted through the liquid crystal metasurface array;
• and
• emitting the generated radio frequency signal transmitted through the liquid crystal metasurface array, or directing the received radio frequency signal through the liquid crystal metasurface array to the feed.

A microwave device, comprising:

• a first device, a second device, and an antenna, wherein
• the first device is configured to perform a first conversion between a baseband digital signal and an intermediate frequency analog signal,
• the second device is coupled to the first device, and configured to perform a second conversion between the intermediate frequency analog signal and a radio frequency signal, and
• the antenna is coupled to the second device, and comprises:
• a feed;
• a liquid crystal metasurface array;
• a liquid crystal bias control circuit;
• and
• a beam transformation structure, wherein
• the liquid crystal metasurface array comprises a plurality of liquid crystal metasurface array units,
• the feed is configured to generate or receive a radio frequency signal,
• the liquid crystal bias control circuit is configured to:
• determine a to-be-adjusted beam angle, and
• load a voltage bias value on each liquid crystal metasurface array unit in the liquid crystal metasurface array based on the beam angle,
• the liquid crystal metasurface array is configured to:
• transmit the radio frequency signal, and
• generate a lateral offset of a feed phase center based on the voltage bias value, and the beam transformation structure is configured to
• emit the radio frequency signal generated from the feed and then transmitted through the liquid crystal metasurface array, or
• receive the radio frequency signal and then direct the radio frequency signal through the liquid crystal metasurface array to the feed.