Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2016 Mar 30;6:23731. doi: 10.1038/srep23731

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

Copyright © 2016, Macmillan Publishers Limited

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

PMC Copyright notice

(a)The diagram of the 2-bit coding unit cell. The period of the unit is 14 mm, and a commercial printed circuit board F4B is chosen as the dielectric substrate (blue areas) with the relative permittivity of 2.2 and the thickness of 1 mm. The texture has two layers: the top layer and the bottom layer, which have mirror-symmetrical geometries except of the feeding lines. The two layers are separated by air with the gap of d = 3 mm. The pin diodes are connected between the fishnets in the outer rings and the middle metallic patches, which are insulated by the size of g = 2 mm. (b) The 2-bit programmable coding metasurface for our single-sensor and single-frequency imaging, in which FPGA can randomly deliver the binary codes (0 or 3.3 V voltage) on rows (green) and columns (red), simultaneously. (c,d) The simulated amplitudes (c) and phases (d) of transmission characteristics of the 2-bit coding unit cell with different states.