Abstract
An optically transparent metasurface (MS) is proposed to design a resonant cavity fed by a patch antenna operating at 5.6 GHz. In the proposed MS, a transparent micro metal mesh conductive (MMMC) film is used as the transparent conducting film (TCF), and it has a high optical transmittance of more than 75% and a low sheet resistance of 0.7 Ω/sq. The MS is composed of a layer of glass substrate and a layer of MMMC film. The unit cell of MS consists of a square patch using MMMC film patterned on a square glass substrate. The transparent MS, patch antenna, ground plane, and air-filled half-wavelength cavity form a resonant cavity antenna, to achieve an improved gain. The MS is designed, optimized and analyzed using the EM simulation software CST. Results show that the MS can improve the simulated boresight gain from 4.7 to 13.2 dBi by 8.5 dB, without affecting the impedance bandwidth (IMBW) much. The losses of MS with different values of sheet resistance are also studied, showing the MS using MMMC with sheet resistance of 0.7 Ω/sq has very small losses.
Highlights
In recent years there has been increased interest in thin-film, electromagnetically sensitive surfaces known as metasurfaces (MS)
We propose an optically transparent MS using micro metal mesh conductive (MMMC) film to design a resonant cavity fed [14,15,16,17] by a patch antenna operating at 5.6 GHz
MS consists of a square patch using MMMC film patterned on a square glass substrate
Summary
In recent years there has been increased interest in thin-film, electromagnetically sensitive surfaces known as metasurfaces (MS). Some microwave components, such as antennas and couplers, have been designed using transparent conductive film (TCF) for the purpose of aesthetics [9,10,11,12,13]. We propose an optically transparent MS using MMMC film to design a resonant. The unit cell of one has used MMMC film to design a MS for the resonant cavity antenna [14,15,16,17]. MS consists of a square patch using MMMC film patterned on a square glass substrate. Consists of a square patch using MMMC film patterned on a square glass substrate. A patch antenna is used for studying the gain enhancement of proposed MMMC film has very small losses. Measured boresight gain by 7 dB (from 5.2 to 12.2 dBi) at the resonant frequency of 5.6 GHz
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