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Sidelobe and cross polarization suppression method for array antenna

An array antenna and sidelobe technology, applied in the field of array antenna sidelobe and cross-polarization suppression

Active Publication Date: 2019-03-29
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In array reception, there is no effective way to suppress sidelobes and cross-polarization through array optimization

Method used

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  • Sidelobe and cross polarization suppression method for array antenna
  • Sidelobe and cross polarization suppression method for array antenna
  • Sidelobe and cross polarization suppression method for array antenna

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Embodiment Construction

[0058] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings.

[0059] In order to further illustrate the performance of the present invention, the cross-polarization suppression method in the present invention is compared with the method without cross-polarization suppression: the number of array elements is N=16, the array element spacing is λ / 2, and RHCP is considered as the main factor. Polarization reception, while testing the co-polarization and cross-polarization reception performance of the antenna. Set the main lobe of the antenna to be [-12°, 12°], the side lobe beam to be [-90°,-20°]∪[20°,90°], and the suppression area of ​​cross-polarization to be [42°,58°] .

[0060] figure 1 , 'CP-no XP supress' and 'XP-no XP suppress' represent the main polarization pattern and cross-polarization pattern wit...

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Abstract

The invention discloses a sidelobe and cross polarization suppression method for an array antenna, which belongs to the technical field of antennas. A cross polarization suppression optimization modeland a sidelobe suppression optimization model are firstly constructed; the constructed optimization models are then solved by iteration, the values continuously approach the optimal solution while left and right weight coefficients approach each other, and the solving speed is quickened. Besides, the convergence of the model is guaranteed by introducing a tuning factor. A convex optimization technology is used, a method of simultaneously suppressing sidelobes and cross-polarization of the array antenna is arranged through optimal selection on the antenna weight coefficients, the independent receiving ability of the array antenna for dual-polarization signals from different satellites is improved, and mutual influences are suppressed.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to the sidelobe and cross-polarization suppression technology of an array antenna. Background technique [0002] Multimedia receiving applications based on mobile platforms (such as cars, trains, ships, etc.) are increasingly becoming a part of public life. Multimedia reception based on terrestrial network needs to pay expensive traffic fees, while multimedia reception based on satellite forwarding technology not only does not require users to pay traffic fees, but also has wider geographical coverage than terrestrial networks, so it has huge application potential. However, because the satellite signal is easily blocked by ground buildings and various woods, hills and other factors, it has its inherent disadvantages. Taking the L-band ASIASTAR satellite as an example, in order to solve the problem of being easily blocked by single-satellite forwarding, the country plan...

Claims

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Application Information

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IPC IPC(8): G01S19/13
CPCG01S19/13
Inventor 雷世文胡皓全孙凯田径唐璞陈波
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA