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2D array electric scanning antenna and scanning method thereof

A scanning method and electronic scanning technology, applied in the electromagnetic field, can solve problems such as the inability to realize edge-shot scanning, the limited scanning range, and the inability to realize two-dimensional full-space scanning without blind spots, etc., and achieve simple structure, simplified complexity, and low cost Effect

Inactive Publication Date: 2016-10-05
NAT SPACE SCI CENT CAS
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Problems solved by technology

However, the scanning angle of these frequency-sweep antennas is also limited, and its scanning range is limited to a small range of forward or backward angles, and it is still impossible to achieve side-fire scanning; it can be seen that using a traditional frequency-sweep array to form a two-dimensional frequency-phase The scanning antenna array has a limited scanning range and cannot realize two-dimensional full-space scanning without blind spots

Method used

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  • 2D array electric scanning antenna and scanning method thereof
  • 2D array electric scanning antenna and scanning method thereof
  • 2D array electric scanning antenna and scanning method thereof

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Embodiment Construction

[0064] Before describing the embodiments of the present invention in detail, the relevant principles will be described first.

[0065] The antenna of the present invention utilizes a composite right / left-handed (Composite Right / Left-Handed: CRLH) leaky-wave antenna in a balanced state to form an antenna array; the dispersion expression of the CRLH unit in a balanced state is:

[0066] β ( ω ) = 1 p ( ω L R C R - 1 ω L L C L )

[0067] Among them, β is the propagation constant, p is the unit length, L...

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Abstract

The invention provides a two-dimensional array electronic scanning antenna, the antenna includes N parallel composite left and right hand leaky wave antennas; the composite left and right hand leaky wave antenna includes M serial composite left and right hand radiation units; each composite left and right hand leaky wave The antenna is connected to a feed channel; the feed channel is composed of an amplifier, an attenuator and a phase shifter connected in sequence, and the amplifier and attenuator are used to control the excitation amplitude and optimize the performance of the antenna pattern; the phase shifter is used to control each The phase of each channel; the antenna has the characteristics of simple structure and low cost. Based on the above-mentioned two-dimensional array electronic scanning antenna, the present invention also provides a scanning method of the two-dimensional array electronic scanning antenna, which can realize scanning in two-dimensional space without blind spots.

Description

technical field [0001] The invention relates to the electromagnetic field, in particular to a two-dimensional array electric scanning antenna and a scanning method thereof. Background technique [0002] With the rapid development of space technology, the requirements for modern radar and communication technology are getting higher and higher. As an important part of modern radar, the antenna has higher and higher requirements for fast and flexible scanning of its lobe. This requirement cannot be realized only by the mechanical movement of the antenna, so people introduce the electric scanning antenna technology in the radar field. Electronically scanned antennas can not only achieve rapid changes in beam pointing and beam shape, but also easily form multi-beam antennas, which can perform signal power synthesis in space (see reference [1]: Zhang Guangyi, Zhao Yujie. Phased array radar technology. Electronics industry Press, 2006.). [0003] Since the 1960s, electronic scann...

Claims

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Application Information

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IPC IPC(8): H01Q3/34H01Q1/36
Inventor 杨青山张云华
Owner NAT SPACE SCI CENT CAS
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