Search

CN-122000691-A - IFA-based parasitic coupling multi-band antenna and communication equipment

CN122000691ACN 122000691 ACN122000691 ACN 122000691ACN-122000691-A

Abstract

The invention provides an IFA-based parasitic-coupling multi-band antenna and communication equipment, wherein the IFA-based parasitic-coupling multi-band antenna comprises a substrate and an antenna structure; the antenna structure comprises a connecting arm, a first radiation arm, a second radiation arm and a third radiation arm, wherein the connecting arm, the first radiation arm, the second radiation arm and the third radiation arm are all arranged on the base material, and the connecting arm comprises a first connecting part and a second connecting part which are connected with each other. Compared with the prior art, the parasitic coupling multi-band antenna based on the IFA has the advantages that multiple resonances are generated by the antenna through the multiple radiating arms and the two gaps, the working frequency band is widened, the antenna efficiency is better, three working frequency bands with low frequency and intermediate frequency and high frequency can be covered, the multi-band full coverage is realized, the working frequency band is wider under the condition that the internal space of communication equipment is not increased, the space occupied by the antenna is small, and the cost is reduced.

Inventors

  • LIU MENGWEN

Assignees

  • 深圳市中诺通讯有限公司

Dates

Publication Date
20260508
Application Date
20260209

Claims (10)

  1. 1. The parasitic coupling multi-band antenna based on the IFA is characterized by comprising a substrate and an antenna structure; the substrate is provided with a feed point, an antenna anchor and a parasitic anchor; The antenna structure comprises a connecting arm, a first radiating arm, a second radiating arm and a third radiating arm, wherein the connecting arm, the first radiating arm, the second radiating arm and the third radiating arm are all arranged on the substrate; the connecting arm comprises a first connecting part and a second connecting part which are connected with each other, the first connecting part is positioned at one side of the first radiating arm, a first antenna gap is formed between the first connecting part and the first radiating arm, the first connecting part is connected with the feed point, the second connecting part is connected with the antenna ground leg, and a second antenna gap is formed between the first connecting part and the second connecting part; the second radiation arm is connected with the second connecting part; The third radiation arm is connected with the third connecting part; The first radiating arm and the feeding point are coupled through the first antenna slot, and the feeding point, the first radiating arm and the parasitic ground leg form a first antenna loop; The feed point, the second radiation arm and the antenna anchor form a second antenna loop; And the feed point, the third radiation arm and the antenna anchor form a third antenna loop.
  2. 2. The IFA-based parasitically coupled multi-band antenna of claim 1, wherein the first radiating arm has a first extension formed on a side thereof adjacent to the first connection portion, and the parasitic leg is connected to the first extension.
  3. 3. The IFA-based parasitically coupled multi-band antenna of claim 1, wherein the first connection portion and the second connection portion are sequentially arranged along a predetermined direction, and the first radiating arm extends in a direction opposite to the predetermined direction.
  4. 4. The IFA-based parasitically coupled multi-band antenna of claim 1, wherein the first and second connecting portions are arranged in sequence along a predetermined direction, the second and third radiating arms extending in the predetermined direction.
  5. 5. The IFA-based parasitic-coupling multiband antenna according to claim 1, wherein an avoidance space is formed in the substrate, the avoidance space is located on one side, away from the antenna ground leg, of the second connecting portion, and the second radiating arm extends around the avoidance space.
  6. 6. The IFA-based parasitically coupled multi-band antenna of claim 1, wherein the second connecting portion has a second extension portion formed on a side thereof remote from the third radiating arm, the second extension portion extending away from the third radiating arm.
  7. 7. The IFA-based parasitically coupled multi-band antenna according to any one of claims 1 to 6, wherein the first antenna loop corresponds to an operating frequency band of 2.3-2.6GHz.
  8. 8. The IFA-based parasitically coupled multi-band antenna according to any one of claims 1 to 6, wherein the second antenna loop corresponds to an operating frequency band of 1.7-2.1GHz.
  9. 9. The IFA-based parasitically coupled multi-band antenna according to any one of claims 1 to 6, wherein the third antenna loop corresponds to an operating frequency band of 0.8-0.9GHz.
  10. 10. A communication device comprising a housing and an IFA-based parasitically coupled multi-band antenna according to any one of claims 1 to 9, said substrate being disposed within said housing.

Description

IFA-based parasitic coupling multi-band antenna and communication equipment Technical Field The invention relates to the technical field of antennas, in particular to an IFA-based parasitic coupling multi-band antenna and communication equipment. Background With rapid development of terminal electronic products, communication equipment such as smart phones is updated rapidly, and the communication equipment is developed from the previous 2G age to the current 5G age. The larger the screen of the 5G smart phone is, the smaller the antenna clearance is, the more frequency bands are required, the more the number of the 5G smart phone antennas is, the more compact the antenna layout is, especially the current mainstream 5G smart phone product is basically a full screen design, the smaller the antenna clearance is, the internal structure environment becomes complex, and the existing antennas are all single antennas only capable of covering one working frequency band, and the performance is poor. Disclosure of Invention The invention aims to overcome the defects and shortcomings in the prior art and provides an IFA-based parasitically-coupled multi-band antenna and communication equipment. One embodiment of the invention provides an IFA-based parasitically coupled multi-band antenna, comprising a substrate and an antenna structure; the substrate is provided with a feed point, an antenna anchor and a parasitic anchor; The antenna structure comprises a connecting arm, a first radiating arm, a second radiating arm and a third radiating arm, wherein the connecting arm, the first radiating arm, the second radiating arm and the third radiating arm are all arranged on the substrate; the connecting arm comprises a first connecting part and a second connecting part which are connected with each other, the first connecting part is positioned at one side of the first radiating arm, a first antenna gap is formed between the first connecting part and the first radiating arm, the first connecting part is connected with the feed point, the second connecting part is connected with the antenna ground leg, and a second antenna gap is formed between the first connecting part and the second connecting part; the second radiation arm is connected with the second connecting part; The third radiation arm is connected with the third connecting part; The first radiating arm and the feeding point are coupled through the first antenna slot, and the feeding point, the first radiating arm and the parasitic ground leg form a first antenna loop; The feed point, the second radiation arm and the antenna anchor form a second antenna loop; And the feed point, the third radiation arm and the antenna anchor form a third antenna loop. In some alternative embodiments, a first extension portion is formed on a side of the first radiating arm, which is close to the first connection portion, and the parasitic foot is connected to the first extension portion. In some alternative embodiments, the first connection portion and the second connection portion are arranged in sequence along a preset direction, and the first radiation arm extends in a direction opposite to the preset direction. In some alternative embodiments, the first connection portion and the second connection portion are arranged in sequence along a preset direction, and the second radiation arm and the third radiation arm extend toward the preset direction. In some optional embodiments, an avoidance space is provided on the substrate, the avoidance space is located on a side, away from the antenna anchor, of the second connection portion, and the second radiation arm extends around the avoidance space. In some alternative embodiments, a second extension is formed on a side of the second connection portion away from the third radiating arm, and the second extension extends away from the third radiating arm. In some alternative embodiments, the working frequency band corresponding to the first antenna loop is 2.3 GHz to 2.6GHz. In some optional embodiments, the working frequency band corresponding to the second antenna loop is 1.7-2.1GHz. In some optional embodiments, the working frequency band corresponding to the third antenna loop is 0.8-0.9GHz. Another embodiment of the present invention provides a communication device comprising a housing and an IFA-based parasitically coupled multi-band antenna as described above, the substrate being disposed within the housing. Compared with the prior art, the parasitic coupling multi-band antenna based on the IFA has the advantages that multiple resonances are generated by the antenna through the multiple radiating arms and the two gaps, the working frequency band is widened, the antenna efficiency is better, the number of the antenna resonances can reach 3, three working frequency bands of low frequency, intermediate frequency and high frequency can be covered, the multi-band full coverage is realized, the working frequency band is wider under the cond