A user terminal equipment, comprising: a radio frequency front-end module (410, 51) configured to control antennas to receive and transmit radio frequency signals; an antenna module (420, 52) configured to receive and transmit radio frequency signals and comprising N internal antennas and M external antennas, the M external antennas being electrically coupled to the radio frequency front-end module via a peripheral interface of the user terminal equipment, N being an integer larger than 0, and M being a positive integer smaller than or equal to N; and a processor (430, 53) configured to select M internal antennas from the N internal antennas to receive and transmit radio frequency signals when the M external antennas are configured to receive and transmit radio frequency signals, to realize reception and transmission of radio frequency signals from 2 M ∗ 2 M channels; the N internal antennas are divided into N /2 internal-antenna groups, wherein each internal-antenna group comprises a first antenna in a first polarization direction and a second antenna in a second polarization direction, and the N /2 internal-antenna groups are respectively distributed on N /2 different planes along a periphery of the user terminal equipment, wherein N is an even number larger than or equal to 2; characterized in that: the N internal antennas comprise eight internal antennas, wherein the eight internal antennas are divided into four internal-antenna groups, wherein the four internal-antenna groups are distributed around a periphery of the user terminal equipment, and each of the four internal-antenna groups comprises a first antenna in a first polarization direction and a second antenna in a second polarization direction; and the M external antennas comprise two external antennas, wherein the two external antennas form an external-antenna group. a radio frequency front-end module (410, 51) configured to control antennas to receive and transmit radio frequency signals; an antenna module (420, 52) configured to receive and transmit radio frequency signals and comprising N internal antennas and M external antennas, the M external antennas being electrically coupled to the radio frequency front-end module via a peripheral interface of the user terminal equipment, N being an integer larger than 0, and M being a positive integer smaller than or equal to N; and a processor (430, 53) configured to select M internal antennas from the N internal antennas to receive and transmit radio frequency signals when the M external antennas are configured to receive and transmit radio frequency signals, to realize reception and transmission of radio frequency signals from 2 M ∗ 2 M channels; the N internal antennas are divided into N /2 internal-antenna groups, wherein each internal-antenna group comprises a first antenna in a first polarization direction and a second antenna in a second polarization direction, and the N /2 internal-antenna groups are respectively distributed on N /2 different planes along a periphery of the user terminal equipment, wherein N is an even number larger than or equal to 2; characterized in that: the N internal antennas comprise eight internal antennas, wherein the eight internal antennas are divided into four internal-antenna groups, wherein the four internal-antenna groups are distributed around a periphery of the user terminal equipment, and each of the four internal-antenna groups comprises a first antenna in a first polarization direction and a second antenna in a second polarization direction; and the M external antennas comprise two external antennas, wherein the two external antennas form an external-antenna group. the N internal antennas comprise eight internal antennas, wherein the eight internal antennas are divided into four internal-antenna groups, wherein the four internal-antenna groups are distributed around a periphery of the user terminal equipment, and each of the four internal-antenna groups comprises a first antenna in a first polarization direction and a second antenna in a second polarization direction; and the M external antennas comprise two external antennas, wherein the two external antennas form an external-antenna group.