Abstract:
The application disclose an antenna. The antenna includes a first radiating element, a second radiating element, a third radiating element, and a closed ring, where the first radiating element is connected to a first feed point, the second radiating element is connected to a second feed point, and the third radiating element is connected to a third feed point; the closed ring is configured to be disposed in a clearance area of a ground plate, and configured to connect to the ground plate; the first radiating element, the second radiating element, and the third radiating element are connected by using a microstrip, to form a radiator; the third radiating element is disposed between the first radiating element and the second radiating element.
Abstract:
A board includes: a baseband unit, multiple transmitters, multiple receivers, a multi-antenna array, a correction transceiver, a correction calculation unit, a bidirectional coupler, and a combiner-splitter. The bidirectional coupler is configured to couple radio frequency signals output by the multiple transmitters and then transmit the coupled radio frequency signals to the combiner-splitter, and to couple receiver correction reference signals obtained by performing division by the combiner-splitter and then send the coupled receiver correction reference signals to the multiple receivers; and the combiner-splitter is configured to combine transmitter radio frequency signals coupled by the bidirectional coupler and then transmit the combined transmitter radio frequency signals to the correction transceiver, and to divide a receiver correction reference signal sent by the correction transceiver and then send receiver correction reference signals obtained by performing division to the coupler. Accuracy of channel reciprocity correction of a transmitter and a receiver can be ensured.