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Double-frequency dual-polarization cavity backed slot antenna

A slot antenna, dual-polarization technology, applied in slot antennas, antenna unit combinations with different polarization directions, independent antenna unit combinations, etc., can solve the problems of difficult array formation, large space for multiple antennas, etc. Features, high machining accuracy, light weight effect

Active Publication Date: 2012-12-26
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the antenna needs to work in multiple frequency bands and has dual polarization characteristics, ordinary microstrip slot antennas do not have this characteristic, and the integration of multiple antennas takes up a large space, which also brings difficulties to the array

Method used

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  • Double-frequency dual-polarization cavity backed slot antenna
  • Double-frequency dual-polarization cavity backed slot antenna
  • Double-frequency dual-polarization cavity backed slot antenna

Examples

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Embodiment

[0043] We have implemented a dual-band dual-polarization cavity-backed slot antenna in two frequency bands of 2.4GHz and 3.6GHz. Wherein the substrate is a high-frequency dielectric substrate.

[0044] For the simulation results of the antenna, see Figure 5 - Figure 10 .

[0045] The working principle of the dual-band dual-polarized cavity-backed slot antenna:

[0046] The dual-frequency dual-polarized cavity-backed slot antenna opens a "ten" cross double slot on the slot metal surface of the cavity-backed slot antenna. When passing through the slit, part of it bypasses the slit, and part of it passes through the slit in the form of displacement current and radiates to space. Double slits of different lengths can have different radiation frequency bands. The feed circuit above the dielectric layer is in the form of a double-arm feed, which makes each feed slot have two feed points. Adjusting the relative positions of the two feed points and the slot can change the impedanc...

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Abstract

The invention discloses a dual-frequency dual-polarization cavity backed slot antenna which is compact in structure. The dual-frequency dual-polarization cavity backed slot antenna is divided into an upper structure, an intermediate structure and a lower structure, wherein in the upper structure (1), a single metal sheet (11) and a dielectric supported metal foil (12) of a metal round slot director which are used as antenna directors are positioned on a dielectric plate (23); in the intermediate structure (2), a double-arm feed circuit (22) is positioned above the dielectric plate (23), and a crisscross slot metal surface (24) is positioned below the dielectric plate (23); and the lower structure (3) is a rectangular or elliptical metal waveguide cavity or a rectangular or elliptical SIW (Substrate Integrated Waveguide) cavity. According to the dual-frequency dual-polarization cavity backed slot antenna, because the rectangular or elliptical waveguide cavity generates required dual-frequency resonant frequency and the antenna generates effective radiation on dual frequency bands by the special directors, a dual-frequency dual-polarization working mode is achieved, frequency spectrum sharing and efficient information transmission are realized in different frequency bands and the frequency spectrum utilization rate is increased.

Description

technical field [0001] The invention belongs to the field of radio antennas, relates to cavity-backed slot antennas, and is especially suitable for the field of cognitive radios. Background technique [0002] The rapid development and application of modern communication technology has effectively promoted the development of communication systems in the direction of miniaturization, integration and high performance. Microstrip slot antennas are widely used in microwave and millimeter wave systems due to their low cost, light weight, small profile, relatively wide operating bandwidth, and ease of mass production. Because of its compact structure and microstrip feeding form, it can be directly integrated with other circuits in the system, which solves the difficult problem of antenna integration. However, when the antenna needs to work in multiple frequency bands and has dual polarization characteristics, ordinary microstrip slot antennas do not have this characteristic, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q13/18H01Q21/24H01Q21/30
Inventor 华光陈继新洪伟岳西平张飞
Owner SOUTHEAST UNIV
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