CN-116073113-B - Multi-frequency antenna and communication equipment

Abstract

The application provides a multi-frequency antenna and communication equipment. The multi-frequency antenna comprises a reflecting plate, a first radiating unit and a second radiating unit, wherein the first radiating unit and the second radiating unit are arranged on one side of the reflecting plate, and the first radiating unit is located between the reflecting plate and the second radiating unit. The first radiating unit comprises a first radiating part and a metal plate, and the metal plate is positioned between the first radiating part and the second radiating unit. The second radiating unit comprises a second radiating part and a metal ring, and the metal ring is positioned between the second radiating part and the metal plate. When adopting above-mentioned structure, can reduce the holistic size of multifrequency antenna, and make possess higher isolation between first frequency channel and the second frequency channel, guarantee that two frequency channels can each independent operation, can satisfy the miniaturized demand of multifrequency antenna common antenna face, antenna job stabilization, efficiency is higher.

Inventors

• ZHANG XIUYIN
• ZHANG ZHIJIE
• LIAO ZHIQIANG
• XUE CHENGDAI

Assignees

• 华为技术有限公司

Dates

Publication Date

20260508

Application Date

20211104

Claims (9)

1. 1. The utility model provides a multifrequency antenna, its characterized in that includes the reflecting plate, and set up in first radiating element and the second radiating element of reflecting plate one side, first radiating element is located between the reflecting plate with the second radiating element, wherein: the first radiating unit comprises a first radiating part and a metal plate, and the metal plate is positioned between the first radiating part and the second radiating unit; The second radiating unit comprises a second radiating part and a metal ring, and the metal ring is positioned between the second radiating part and the metal plate; The first radiation part is provided with a first through hole; The second radiation unit further comprises a balun, the second radiation part is arranged on the reflecting plate through the balun, and the balun is connected with the reflecting plate through the first radiation part by the first through hole; the first radiation unit and the second radiation unit are stacked along a first direction, and the first direction and the reflecting plate form an included angle; The perimeter of the cross section of the first through hole perpendicular to the first direction is larger than 1/10 of the wavelength corresponding to the lowest working frequency of the first radiation unit; the circumference of the metal ring on a plane perpendicular to the first direction is larger than 1/2 of the wavelength corresponding to the lowest working frequency of the second radiation unit; The metal ring is sleeved outside the balun and is fixedly connected with the balun through a non-conductive structural member.
2. 2. The multi-frequency antenna of claim 1, wherein the metal plate has a second through hole, the balun passing through the metal plate by the second through hole.
3. 3. The multi-frequency antenna according to claim 2, wherein a side of the metal plate facing the second radiation portion has an extension plate.
4. 4. A multi-frequency antenna as claimed in claim 3 wherein the height of the extension plate along the first direction is greater than 1/12 of the wavelength corresponding to the lowest operating frequency of the first radiating element.
5. 5. The multi-frequency antenna according to any one of claims 1 to 4, wherein the metal ring is sleeved outside the balun, and the metal ring is fixedly connected with the second radiation portion.
6. 6. The multi-frequency antenna according to any one of claims 1-4, wherein the second radiating element further comprises a mounting plate, the second radiating portion is fixedly connected to one side of the mounting plate, and the metal ring is fixedly connected to the other side of the mounting plate.
7. 7. The multi-frequency antenna according to any one of claims 1 to 4, wherein a feeding pin is disposed on a side of the reflecting plate facing the first radiation portion, and the feeding pin is electrically connected to the first radiation portion.
8. 8. The multi-frequency antenna of any one of claims 1-4, wherein the first direction is perpendicular to the reflector.
9. 9. A communication device, comprising a radio frequency processing unit and the multi-frequency antenna according to any one of claims 1 to 8, wherein the radio frequency processing unit is electrically connected to the multi-frequency antenna.

Description

Multi-frequency antenna and communication equipment Technical Field The present application relates to the field of antenna technologies, and in particular, to a multi-frequency antenna and a communication device. Background The evolution of base station antennas towards multiple frequencies, multiple polarizations, to meet the needs of individual operators, or the common needs of multiple operators, is a current trend. However, in the practical implementation process of the conventional multi-frequency antenna, the size of the space between the antennas is generally large in order to meet the requirements of the indicators such as isolation and directional patterns. Once the space between the antennas is small, the mutual influence between the frequency bands becomes significantly large, and the index is significantly deteriorated. Taking a dual-band antenna as an example, the existing dual-band antenna generally adopts a side-by-side (SBS) arrangement mode, and the distance between radiating oscillators in two frequency bands is generally greater than 0.5 times of the wavelength corresponding to the working frequency in the lower frequency band, so that the requirements of isolation degree and directional diagram non-distortion of the two frequency bands can be met. But this also results in a substantial increase in the width of the antenna array. In order to reduce the size of the dual-band antenna, the radiating element of the dual-band antenna also adopts a wideband design, and two sub-bands are separated by a combiner, so that two independent frequency bands are realized on a port. However, due to the introduction of the combiner and its connection lines, the insertion loss on the signal path increases significantly and passive intermodulation (passive intermodulation, PIM) interference occurs on the transmit signal path, resulting in a reduced signal-to-noise ratio of the overall antenna system. Disclosure of Invention The application provides a multi-frequency antenna and communication equipment, which are used for realizing the design of a common antenna surface of a temporary frequency dual-band antenna under a small size. In a first aspect, the present application provides a multi-frequency antenna, including a reflecting plate, a first radiating element and a second radiating element, where the first radiating element and the second radiating element are disposed on one side of the reflecting plate, and the first radiating element is located between the reflecting plate and the second radiating element. The first radiating unit comprises a first radiating part and a metal plate, and the metal plate is positioned between the first radiating part and the second radiating unit. The second radiating unit comprises a second radiating part and a metal ring, and the metal ring is positioned between the second radiating part and the metal plate. According to the technical scheme, the first radiating part is used as the radiating functional element of the first radiating unit and corresponds to radiate and receive the first frequency band, the second radiating part is used as the radiating functional element of the second radiating unit and corresponds to radiate and receive the second frequency band, the first radiating part and the second radiating part are arranged in a laminated mode, the whole width of the multi-frequency antenna can be reduced, a metal plate and a metal ring are arranged between the first radiating part and the second radiating part, a resonant standing wave zero point can be generated at the far end of the first frequency band through the arrangement of the metal plate, a resonant standing wave zero point can be generated at the near end of the second frequency band through the arrangement of the metal ring, high isolation between the first frequency band and the second frequency band is achieved, the isolation requirement between the first frequency band and the second frequency band is met, mutual interference between the first radiating part and the second radiating part is weakened, the first radiating part and the second radiating part can be decoupled, the two frequency bands can work independently, and the whole distance between the first frequency band and the second frequency band can be small due to the fact that the high isolation between the first frequency band and the second frequency band is achieved. In whole, the multifrequency antenna has less width and height, and the overall dimension is less to have higher isolation, can realize the decoupling of temporary frequency band, can regard as temporary frequency dual-frenquency antenna (the isolated bandwidth of two frequency channels is less than 5% antenna array) to use, can satisfy the miniaturized demand of dual-frenquency antenna common antenna face, and does not have PIM and interfere, and antenna job stabilization, efficiency is higher, and manufacturing process is simpler. In a specific embodiment, the first