Smart antenna application on vehicles with low profile array antennas

Because the direction of a single antenna is limited, and for strengthening the direct radiant ability of the antenna, we will put the weaker direction antennas together in some way to constitute an antenna array system. The antenna array is also called the array antenna or a disperse antenna array. The antenna cell can be the symmetry center-fed dipole, the aperture antenna, the circle antenna or other forms of the antennas whose direction are limited. In practice, the antenna array is almost constituted of similar antenna cells. I have mainly completed the antenna array direction diagram in conditions of some kinds of parameters. And at last, I get the useful results for practice. This also provides theories basis for the analysis of smart antenna.

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Low-Profile PIFA Array Antennas for UHF Band RFID Tags Mountable on Metallic Objects

IEEE Transactions on Antennas and Propagation ◽

10.1109/tap.2010.2041158 ◽

2010 ◽

Vol 58 (4) ◽

pp. 1087-1092 ◽

Cited By ~ 60

Author(s):

Horng-Dean Chen ◽

Yu-Hung Tsao

Keyword(s):

Rfid Tags ◽

Array Antennas ◽

Low Profile ◽

Uhf Band

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Reduction of Surface Waves in Arrays using Uni-Planar EBG

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.c6433.098319 ◽

2019 ◽

Vol 8 (3) ◽

pp. 8065-8069

Keyword(s):

Mutual Coupling ◽

Unit Cell ◽

Harmonic Suppression ◽

Planar Antennas ◽

Effective Technique ◽

Dispersion Diagram ◽

Electromagnetic Band Gap ◽

Array Antennas ◽

Low Profile ◽

Array Performance

Electromagnetic band gap (EBG) structures can be treated as sporadic arrangement of dielectrics. These structures will aid in the coupling reduction in arrays. In this paper, for reducing coupling between array antennas, a new arrangement of EBG structures is presented. The antenna resonates at 5.8GHz, used for wireless requirement. Here 5 × 2 EBG structures are used to reduce mutual coupling more than 20 dB. The antenna substrate dimensions are 36 mm × 68 mm × 1.6 mm. Also, the dispersion diagram was used to design EBG unit cell. In this, a uniplanar EBG configuration which is easy to fabricate without the use of vias is designed for antennas. Their use in coupling reduction of planar antennas and low-profile antenna applications is explored through an effective technique, because the information required is the dispersion diagram and reflection phase of the unit cell. Diff erent Uniplanar-EBGs are used for optimizing current distribution on the antennas, decreasing the coupling between elements and harmonic suppression. As a result, the antenna array performance is improved and minimum coupling is less than -20 dB by using this EBG structure

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