Antenna and array antenna

1. An antenna, comprising:

a first radiating element; and

a second radiating element,

wherein:

the first radiating element comprises four dipoles enclosing the second radiating element in a plan view, and

the second radiating element is disposed on an inner side of the first radiating element, and

wherein:

the first radiating element is configured to support a transmit frequency band, and the second radiating element is configured to support a receive frequency band, or

the first radiating element is configured to support the receive frequency band, and the second radiating element is configured to support the transmit frequency band; and

a third radiating element disposed on an outer side of the first radiating element,

wherein:

the first radiating element is configured to support a first transmit frequency band and a second transmit frequency band,

the second radiating element and the third radiating element each are configured to support either of a first receive frequency band or a second receive frequency band, and

the second radiating element and the third radiating element support different frequency bands.

2. The antenna according to claim 1 , wherein the first transmit frequency band is 1805-1880 MHz, the second transmit frequency band is 2110-2170 MHz, the first receive frequency band is 1710-1785 MHz, and the second receive frequency band is 1920-1980 MHz.

3. The antenna according to claim 1 ,

wherein the first radiating element is further configured to support a first receive frequency band and a second receive frequency band, and the second radiating element and the third radiating element each are further configured to support either of a first transmit frequency band or a second transmit frequency band.

4. The antenna according to claim 3 , wherein the first transmit frequency band is 1805-1880 MHz, the second transmit frequency band is 2110-2170 MHz, the first receive frequency band is 1710-1785 MHz, and the second receive frequency band is 1920-1980 MHz.

5. The antenna according to claim 1 , wherein the transmit frequency band is 1805-1880 MHz, and the receive frequency band is 1710-1785 MHz.

6. The antenna according to claim 1 , wherein the first radiating element is configured to support the transmit frequency band, and the second radiating element is configured to support the receive frequency band.

7. The antenna according to claim 1 , wherein the first radiating element is configured to support the receive frequency band, and the second radiating element is configured to support the transmit frequency band.

8. An array antenna, comprising a plurality of antennas, wherein each antenna of the plurality of antennas respectively comprises:

a first radiating element; and

a second radiating element,

wherein:

the first radiating element comprises four dipoles enclosing the second radiating element in a plan view, and

the second radiating element is disposed on an inner side of the first radiating element; and

wherein, for each antenna of the plurality of antennas:

the first radiating element of the respective antenna is configured to support a transmit frequency band, and the second radiating element of the respective antenna is configured to support a receive frequency band, or

the first radiating element of the respective antenna is configured to support the receive frequency band, and the second radiating element of the respective antenna is configured to support the transmit frequency band; and

a third radiating element, wherein each third radiating element is disposed on an outer side of the respective corresponding first radiating element,

wherein:

each first radiating element is configured to support a first transmit frequency band and a second transmit frequency band,

each second radiating element and each third radiating element are configured to support either of a first receive frequency band or a second receive frequency band, and

the second radiating elements and the third radiating elements support different frequency bands.

9. The array antenna according to claim 8 , wherein antennas of the plurality of antennas are arranged into a row or a column to form a linear array.

10. The array antenna according to claim 8 , wherein antennas of the plurality of antennas are arranged into square arrays.

11. The array antenna according to claim 8 , wherein a range of a distance between two adjacent first radiating elements is 0.4λ to 0.6λ, and λ represents a wavelength corresponding to a frequency band supported by the first radiating elements.

12. The array antenna according to claim 8 , wherein antennas of the plurality of antennas are arranged according to a preset deployment scheme.

13. The array antenna according to claim 8 , wherein the first transmit frequency band is 1805-1880 MHz, the second transmit frequency band is 2110-2170 MHz, the first receive frequency band is 1710-1785 MHz, and the second receive frequency band is 1920-1980 MHz.

14. The array antenna according to claim 8 ,

wherein each first radiating element is configured to support a first receive frequency band and a second receive frequency band, and each second radiating element and each third radiating element are configured to support either of a first transmit frequency band or a second transmit frequency band.

15. The array antenna according to claim 14 , wherein the first transmit frequency band is 1805-1880 MHz, the second transmit frequency band is 2110-2170 MHz, the first receive frequency band is 1710-1785 MHz, and the second receive frequency band is 1920-1980 MHz.

16. The array antenna according to claim 8 , wherein the transmit frequency band is 1805-1880 MHz, and the receive frequency band is 1710-1785 MHz.

17. The array antenna according to claim 8 , wherein each first radiating element is configured to support the transmit frequency band, and each second radiating element is configured to support the receive frequency band.