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Bidirectional multi-frequency integrated antenna

An integrated antenna and antenna technology, applied in the direction of antenna, antenna array, radiating element structure, etc., can solve the problems of large size, unusable, and antenna application limitations, and achieve the effect of small size, convenient control and simple structure

Inactive Publication Date: 2006-10-25
SOUTHEAST UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

They all have the disadvantage of large size. They can still be used in outdoor environments or places with no special restrictions on space volume, but basically cannot be used in indoor environments or places with limited space.
In addition, because they are composed of independent single antennas, they can only achieve two-way antenna radiation performance in one frequency band, and cannot achieve multi-frequency and multi-mode operation in one antenna, which limits the application of the above-mentioned antennas.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A bidirectional multi-frequency integrated antenna used in a communication system, comprising a dielectric substrate 1, on which two surfaces of the dielectric substrate 1 are respectively provided with a microstrip transmission line 21, a microstrip ground 22 and at least two symmetrical dipole antennas 3, The other ends of the microstrip transmission line 21 and the microstrip ground 22 are respectively connected with a T-shaped branch 6 and connected with the unbalanced input port of the T-shaped branch 6 respectively. A symmetrical dipole antenna in each pair of symmetrical dipole antennas is connected with the T-shaped dipole antenna. The balanced output port of the branch is connected, and the other symmetrical dipole antenna is connected with the other balanced output port of the T-shaped branch. Any pair of vibrators forming the symmetrical dipole antenna are respectively located on the two surfaces of the dielectric substrate 1 and are respectively located on the...

Embodiment 2

[0027] A two-way antenna working in the WLAN 802.11b / g frequency band such as Figure 5 As shown, the microstrip dielectric substrate of the antenna and the feed circuit and printed antenna on it are as follows figure 1 . The dielectric substrate is a glass fiber-polytetrafluoroethylene double-sided copper-clad board with a thickness of 1mm and a dielectric constant of 2.65. The signal feed-in point is connected in such a way that the inner conductor 51 of the coaxial cable 5 is connected to the feeder input end 21, the outer conductor 52 of the coaxial cable 5 is connected to the microstrip ground 22 of the feeder input end, and is also welded to the metal ground plane 4 at the same time. together to ensure good ground performance, see figure 1 , FIG. 2, FIG. 4 and FIG. 4, the radome 10 is used to protect the antenna and beautify it. For the pattern and the test results of the S11 frequency response characteristic representing the return loss of the port, see Figure 9 , ...

Embodiment 3

[0029] The feed and vibrator structure of a two-way dual-frequency dual-mode antenna is as follows: Figure 6 shown. On the microstrip dielectric substrate 1, there are feeder circuits 2, two groups of vibrator antennas working at different frequencies (4 pairs in total) H (2 pairs), L (2 pairs), T-shaped branch 6, balanced-unbalanced transformation Device 7, a group of dipole antennas H with high frequency is placed between a group of dipole antennas L with low frequency, and the ends of the dipole arms of a group of low frequency antennas can be folded 33, 34 at 90° to reduce the size of the antenna. A balun 7 can also be used Figure 7 The structure shown is implemented on the main feeder before the T-shaped branch, and the signals of the two frequency bands can feed the antenna from 21 and 22 through a coaxial cable. The method of connecting the antenna to the coaxial cable 5 and the metal ground plane 4 is the same as that of the first embodiment, and the antenna is pla...

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Abstract

This invention discloses a double multi-frequency integration antenna including a medium chip and shape-T branch, in which, a micro-strip transmission line, a micro-strip ground and at least two pairs of symmetrical vibrator antennas are set at two surfaces of the medium chip, the unbalance input end of the T branch is connected with the micro-strip transmission line and the ground, the balance output end of the T branch is connected with a symmetrical vibrator antenna in the symmetrical vibrator antennas, the other balance output end of the branch is connected with the other antenna, the pair of vibrators on the two surfaces of the medium chip are connected with the balanced output ports of the two T branches on the two surfaces of the chip and the micro-strip ground is connected with the vibrators of the antenna by graded lines.

Description

technical field [0001] The invention relates to an antenna that can be used in the fields of wireless communication, information broadcasting, detection, electronic countermeasures, etc., and in particular to a bidirectional multi-frequency integrated antenna suitable for use in a communication system where multi-frequency and multi-mode coexist. Background technique [0002] The proper form of the antenna pattern plays an important role in the performance of the communication system. Usually, the antennas used in wireless systems are unidirectional directional radiation and azimuth omnidirectional radiation antennas, but in special environments, bidirectional radiation antennas are required to achieve reasonable energy distribution and suppress interference. The commonly used two-way antenna is mainly realized by the method of forming an array of omnidirectional antennas (such as a binary array) and the method of erecting two identical unidirectional directional radiation a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q13/08H01Q21/00
Inventor 蒯振起洪伟周健义赵嘉宁
Owner SOUTHEAST UNIV
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