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Omnidirectional radiative microstrip aerial

A technology of microstrip antenna and omnidirectional radiation, which is applied in the field of wireless communication, can solve the problems of unrealized omnidirectional radiation, and achieve the effect of low cross polarization level and low profile

Inactive Publication Date: 2011-06-01
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current microstrip antenna can adjust the maximum radiation direction from side-fire to end-fire by designing different microstrip elements, but it has not achieved omnidirectional radiation.

Method used

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  • Omnidirectional radiative microstrip aerial
  • Omnidirectional radiative microstrip aerial
  • Omnidirectional radiative microstrip aerial

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: first refer to Figure 1~3 The structural diagram of the microstrip antenna of the present invention is described.

[0024] The bottom surface of the dielectric substrate 1 is a metal floor 6 , and the upper surface of the substrate 1 is a radiation metal patch 2 . The metal floor 6, the dielectric substrate 1 and the radiating metal patch 2 are placed in parallel sequentially from bottom to top. The metal via 3 passes through the dielectric substrate 1 vertically, connects the metal floor 6 and the radiating metal patch 2, and a radio frequency coaxial connector SMA connector connects the radiating metal patch 2 and the metal grounding plate 6, and serves as a feeder for the antenna radio signal Incoming interface. The inner core 4 of the SMA coaxial joint passes through the small hole of the same size drilled on the metal ground plate 6 and the dielectric substrate 1 is connected to the radiation metal patch 2, while the metal outer wall of the outer core...

Embodiment 2

[0028] Embodiment 2: refer to Figure 7 , still use the FR4 dielectric substrate with a relative dielectric constant of 4.4 and a size of 40mm×40mm×2mm. The outer contour side length of the radiation metal patch is 22.6mm, the inner contour side length is 4mm, the radius of the metal via hole is 0.3mm, and the adjacent via hole The distance between them is 10.8mm, and the gap width is 0.2mm. In this case, each radiating metal patch of the antenna contains two or more metal vias. This is equivalent to increasing the diameter of the metal via, the equivalent parallel inductance becomes smaller, and the zero-order resonance frequency will become higher. The zero-order resonance of this antenna occurs at 4.4GHz, and omnidirectional radiation can also be achieved at this frequency.

Embodiment 3

[0029] Embodiment 3: refer to Figure 8 , the radiating metal patch of the antenna can be not only rectangular, but also circular, or other shapes, while satisfying the symmetry of the antenna with respect to the normal of the antenna plane, because their equivalent circuits are the same, only the equivalent value Different, it will only affect the working frequency of the zero-order resonance, and both have the performance of omnidirectional radiation. Only the shape of the radiating metal sheet of this antenna is different from that of the foregoing embodiments, and the rest are similar, so details will not be repeated here.

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Abstract

The invention discloses a microband antenna with all-directional radiation, comprising: a medium substrate; a radiation metal pad with microband seam and a metal earthing board, respectively printed on two sides of the medium substrate; at least a metal via connecting the metal earthing board with the radiation metal pad through the medium substrate; a SMA connector, connecting the radiation metal pad with the metal earthing board and used as feed-in interface of antenna electric wave signals. And its advantages: it has low section, and can be conformal with the carrier; at a certain frequency, it has a characteristic of all-directional radiation in horizontal; and has vertical linear electric field polarization and low cross-polarization level.

Description

technical field [0001] The invention relates to a microstrip antenna, which belongs to the technical field of wireless communication, in particular to a microstrip antenna which uses a left-handed / right-handed transmission line structure for receiving or transmitting electromagnetic signals and has omnidirectional radiation performance. Background technique [0002] In many electronic devices such as wireless communication, radar, satellite, electronic countermeasures and electronic navigation, antennas with small size and light weight are increasingly required. Antenna technology has developed from traditional vibrator antennas, Yagi antennas, parabolic antennas, and horn antennas to microstrip antennas with smaller volumes and simpler structures. Compared with traditional antennas, microstrip antennas are small in size, light in weight, low in profile, and have a planar structure, and are easy to conform to carriers (such as missiles, satellites, and other high-speed aircr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q13/08H01Q13/10H01Q1/38
Inventor 冯一军韩文佳赵俊明姜田郝玙陈罡
Owner NANJING UNIV
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