Compact Tightly-Coupled Self-Decoupled MIMO Antenna Using Internal Hybrid Tunning

Enhancing Multi-Band MIMO Antenna Stability for Various Electronic Applications With Human-Body Interaction Consideration

“…Implementing any of the aforementioned methods may potentially deviate from the original design requirements. With the criterion for ECC consistently below 0.5 [2,12,13,27,31], the overall ECC of the MIMO antenna system in this paper is all below 0.5. This indicates that the MIMO antenna system in this paper possesses independent and satisfactory antenna performance.…”

“…As the size of communication electronic equipment gradually decreases, it becomes difficult to design antennas in the limited area of communication electronic equipment. In the same time, it is difficult to maintain good isolation between antennas in a small space because the antennas can interfere with each other and affect signal transmission [11][12][13][14][15][16].…”

“…As the size of communication electronic equipment gradually decreases, it becomes difficult to design antennas in the limited area of communication electronic equipment. In the same time, it is difficult to maintain good isolation between antennas in a small space because the antennas can interfere with each other and affect signal transmission [11][12][13][14][15][16].This paper discusses some antenna design research in recent years and lists the following issues:1) In recent years, due to the popularity of 5G communication technology, there are many antenna designs used in Sub-6G and 5G NR frequency bands that are worthy of reference. In [17], the H-shaped monopole antenna for laptop was proposed.…”

“…3) A MIMO antenna system that meets the above two conditions can directly optimize isolation by changing the antenna position and keeping all antennas' isolation below -10dB [29]. In other literature, -10dB or less is also used as the antenna isolation standard of the antenna [2,4,5,7,8,12,13,26,28,29]. This paper proposes a Multi-Band antenna that realizes the LTE900 frequency band through the coupled-feed structure without using passive components.…”

Self-isolated MIMO antenna using mixed coupling by close coupling technique

“…Various self-isolation-based approaches are offered in literature [17][18][19][20][21][22][23][24][25] . There are techniques that works with common coupled grounding branch 17 , common-mode(CM) and differential-mode(DM) tunning 18 , using ground plane weak-field 19 , gap-coupled loop antennas using asymmetrically mirrored arrangement 20 , L-pattern branch operates as a radiating and de-coupling element 21 , inverted U-pattern member 22 , using closely paired 23 , couplings between a pair of coupled antennas are canceled out by proper adjustment 24,25 . The shorting legs in the PIFA pair 6 are utilized to attain self-isolation in the MIMO antenna.…”