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Loading lumped element frequency selection surface

A technology of frequency selective surface and lumped components, which is applied in the direction of electrical components, waveguide devices, circuits, etc., can solve the problems of large electrical size and difficult implementation, achieve simple design process, improve miniaturization index, and broaden the design scope Effect

Active Publication Date: 2018-12-28
NANJING UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

Due to the low-frequency frequency selection surface resonance frequency is close, and the electrical size is large, it is very difficult to realize.

Method used

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  • Loading lumped element frequency selection surface
  • Loading lumped element frequency selection surface
  • Loading lumped element frequency selection surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0028] Such as figure 2 , image 3 As shown, the present invention is mainly composed of a metal structure, a lumped element and a dielectric substrate to realize radiation of two frequencies. The surface satisfies the following properties:

[0029]

[0030]

[0031]

[0032]

[0033]

[0034] In the formula, L 内环 is the equivalent inductance of the inner ring of the structure, L 外环左 is the equivalent inductance on the left side of the outer ring of the structure, L 外环右 is the equivalent inductance on the right side of the outer metal ring of the structure. L 1 , L 2 is the inductance value of lumped inductors L1 and L2, ε eff is the effective permittivity of the dielectric plate. mu 0 is the magnetic permeability in vacuum, ε 0 is the dielectric constant in vacuum, ε r is the dielectric coefficient of the dielectric plate, C 缝隙 is the gap capacitance between the inner and outer rings.

[0035]

[0036]

[0037]

[0038]

[0039] Among ...

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Abstract

The invention discloses a loading lumped element frequency selection surface, which comprises a dielectric substrate and an inner ring metal patch and an outer ring metal patch closely attached to theupper surface of the dielectric substrate. The inner ring metal patch comprises four first L-shaped metal patches, two adjacent first L-shaped metal patches are provided with gaps, and each gap is provided with a first lumped inductance; the outer ring metal patch comprises four second L-shaped metal patches, and two adjacent second L-shaped metal patches are provided with gaps, wherein two adjacent gaps are provided with lumped capacitors, and the other two adjacent gaps are provided with second lumped inductors. The invention realizes higher miniaturization index and more flexible resonantfrequency point design through lumped components, thereby widening the design range of resonant frequency.

Description

technical field [0001] The invention belongs to the technical field of wireless communication FSS, in particular to a frequency selective surface loaded with lumped elements. Background technique [0002] Traditional miniaturization methods mainly include bending structure loading and lumped component loading. [0003] At present, FSS has made great progress in miniaturization, multi-band and low profile. The implementation scheme of FSS mainly includes metal loading, and its periodic units can be roughly divided into two types, one is a metal patch, and the other is a complementary slot structure on a metal plate. [0004] The frequency selective surface itself does not absorb energy, and its response characteristics vary with frequency, and it is almost completely transparent to incident electromagnetic waves in some frequency bands, while showing near-total reflection characteristics to incident waves in other frequency bands. Its frequency characteristics mainly depend...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20
CPCH01P1/20
Inventor 宗志园阙凯峰
Owner NANJING UNIV OF SCI & TECH
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