Low-band frequency selective surface with minimized cell sizes
Patent Information
- Authority / Receiving Office
- CN Β· China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA SHIP DEV & DESIGN CENT
- Publication Date
- 2012-07-11
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Abstract
Description
technical field
[0001] The invention belongs to the field of electromagnetic compatibility, and in particular relates to a low-frequency frequency selective surface with miniaturized unit size. Background technique
[0002] At present, for electronic equipment with a low working frequency band (300MHz~1GHz), it is difficult to develop a corresponding passband frequency selection surface radome, mainly for the following reasons: firstly, it can be known from the working principle of FSS that the unit perimeter It is approximately proportional to the free-space wavelength of the electromagnetic wave. The size of the periodic unit of the low resonant frequency FSS will be large. Taking the FSS with a resonant frequency of 300MHz as an example, the free-space wavelength of its electromagnetic wave is about 1000mm, and the variable length of the periodic unit is about 250mm, which is almost the same as the size of the equipment antenna. The frequency selective surface made by us...