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High isolation dual-polarized microstrip antenna fed by slot

A microstrip antenna, dual-polarization technology, applied to antenna unit combinations, antennas, electrical components and other directions with different polarization directions, can solve problems such as difficulty in obtaining higher isolation, improve polarization current linearity, improve Isolation, the effect of improving isolation

Active Publication Date: 2011-01-19
SOUTHEAST UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the existing technologies for improving the isolation of dual-polarized microstrip antennas mainly include symmetrical cross-slot feeding, T-shaped slot feeding, probe / edge hybrid feeding, etc., but these technologies usually only obtain about -35~- 40dB isolation, it is difficult to obtain higher isolation

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  • High isolation dual-polarized microstrip antenna fed by slot

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Embodiment Construction

[0019] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0020] see figure 1 , figure 2 and image 3 , the present invention includes a first layer of dielectric board 1, a second layer of dielectric board 2 and a third layer of dielectric board 3, and the dielectric constant of the first layer of dielectric board 1 is 2.65, the thickness is 1 mm, the second layer of dielectric board 2 The dielectric constants of both the dielectric constant and the third dielectric plate 3 are 2.2, and the thicknesses are both 0.508 mm. The second layer of dielectric board 2 tightly adheres the third layer of dielectric board 3 and the second layer of dielectric board 2 together through the common metal layer 7, and the first layer of dielectric board 1 is at a height H above the second layer of dielectric board 2 ...

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Abstract

The invention discloses a high isolation dual-polarized microstrip antenna fed by slot, which comprises a first-layer medium plate, a second-layer medium plate and a third-layer medium plate, wherein the second-layer medium plate and the third-layer medium plate are arranged below the first-layer medium plate, and the lower surface of the first-layer medium plate is provided with radiation stickers; the second-layer medium plate and the third-layer medium plate are fixedly connected to form a whole by a public metal layer, and the public metal layer is provided with a standard cross-shaped slot; the upper surface of the second-layer medium plate and the lower surface of the third-layer medium plate are respectively provided with a first feeding structure and a second feeding structure, and the symmetry axes, which are projected on the public metal layer, of the first feeding structure and the second feeding structure coincide with the symmetry axis of the horizontal slot along the length direction and the symmetry axis of the vertical slot along the length direction. The dual-polarized antenna of the invention can greatly improve the isolation between two orthogonal polarized fields of the dual-polarized antenna, and has extensive applicability and flexibility.

Description

technical field [0001] The invention relates to a microstrip antenna, in particular to a slot-fed high-isolation dual-polarized microstrip antenna. Background technique [0002] In recent years, with the rapid development of wireless communication technology, various wireless communication systems are emerging, and the radio spectrum is becoming more and more crowded. In order to make full use of spectrum resources, dual-polarized antennas have received extensive attention. At the same time, in the MIMO communication system, the use of dual-polarized antennas has the advantages of realizing 2×2 MIMO channels in a small size, increasing the independence between MIMO channels, obtaining the highest polarization diversity gain, increasing the data rate and reducing the bit error rate. Therefore, dual-polarized antennas have become an important antenna technology in high-speed data communication systems. No matter using dual-polarized antennas to improve spectrum utilization or...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q13/08H01Q21/24
Inventor 蒯振起卢杰朱晓维洪伟张念祖
Owner SOUTHEAST UNIV
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