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Adjustable linear polarization wave beam separator based on gradient super-surface

A technology of metasurface and separator, which is applied in the field of metasurface, can solve the problems of high Q value and narrow bandwidth of phase dynamic regulation, and achieve the effect of expanding bandwidth and improving conversion efficiency

Active Publication Date: 2016-04-06
FUDAN UNIV
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Problems solved by technology

However, the previous research on tunable metasurfaces was limited to HMS, and there has been no public report on tunable GMS (TunableGMS, TGMS).
At the same time, due to the introduction of PIN diodes, the Q value is very high, GMS can complete the phase jump in a very narrow frequency range, and the asymptotic behavior is outside the band, and the bandwidth of phase dynamic adjustment is very narrow

Method used

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  • Adjustable linear polarization wave beam separator based on gradient super-surface
  • Adjustable linear polarization wave beam separator based on gradient super-surface
  • Adjustable linear polarization wave beam separator based on gradient super-surface

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Embodiment Construction

[0021] The present invention is further specifically described below through specific examples.

[0022] The TGMS unit consists of a three-layer metal structure, a two-layer dielectric board, and metallized vias connecting the three-layer metal structure, such as figure 1 shown.

[0023] In this embodiment, the upper / lower dielectric boards are all made of polytetrafluoroethylene glass cloth boards, and the dielectric constant ε r =2.65, electric tangent loss tanσ=0.001, thickness of copper foil is 0.036mm, among them, p x =p y =12mm, the distance d between the patch and the open microstrip line 1 =0.4mm, the width d of the open microstrip line 2 =0.5mm, via diameter d 3 =0.3mm, the width of the patch w 1 =3mm, the width w of the high-impedance microstrip line in the brush structure 2 =0.4mm, the outer and inner radius R of the ring in the brush structure 1 =3mm, R 2 =2.5mm, the thickness h of the upper and lower dielectric plates 1 =3mm, h 2 =0.5mm, the height h o...

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Abstract

The invention belongs to the technical field of super-surfaces, specifically an adjustable linear polarization wave beam separator based on a gradient super-surface. The separator takes TGMS units as the basis, enables six TGMS units to sequentially rotate 30 degrees in the clockwise direction, and obtains a TGMS super-unit with a phase gradient. The TGMS super-unit is enabled to carry out two-dimensional periodic extension in x and y orthogonal directions in a horizontal plane, and a microstrip bias line at the lower layer of the TGMS is used for the feed of the TGMS units in each row, thereby obtaining the separator with a plurality of functions. The TGMS units are in a three-layer metal structure, wherein the upper layer consists of a pair of the same metal pasters and an opening microstrip line, wherein the opening at the center of the opening microstrip line is used for loading a PIN diode, the central layer is a metal ground plate and the center consists of two metal columns and circular grooves wrapping the upper column, and the lower layer is a brush structure. The separator greatly improves the conversion efficiency (greater than 89%), and achieves the switching and regulation and control of wave beam separation frequency bands.

Description

technical field [0001] The invention belongs to the technical field of metasurfaces, in particular to an adjustable linear polarization beam splitter based on gradient metasurfaces. Background technique [0002] Metamaterial (MTM) refers to a "specific" artificial composite structure or material with a certain electrical or magnetic response that does not exist in nature itself. People use sub-wavelength artificial microstructure units and design based on electromagnetic theory. Although people can arbitrarily manipulate electromagnetic waves through three-dimensional heterotropic media, high loss and manufacturing complexity greatly limit its application, so there are not many real applications at present. As a two-dimensional planar form of anisotropic medium, a metasurface is born accordingly. Due to its unique electromagnetic characteristics and planar structure, it can conform to high-speed targets such as aircraft, missiles, rockets, and satellites without destroying i...

Claims

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Application Information

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IPC IPC(8): H01Q15/24
CPCH01Q15/244
Inventor 许河秀罗伟杰蔡通周磊
Owner FUDAN UNIV
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