Characteristic Impedance Adjustment of Thin-Metal Mesh Transmission Lines for mmWave Display-Integrated Antennas

This paper proposes four methods and empirical formulas of adjusting characteristic impedances for thin-metal mesh transmission lines. The are discretely adjusted by changing the number size unit meshes, which provides macro-tuning capability, discrete values can be tuned more precisely varying line width aspect ratio geometry. validity proposed is confirmed full-wave numerical simulations, simulated impedance variations well-described our formulas. For further verifications, 26 distinguished samples lines a 28-GHz antenna fabricated, their characteristics measured in millimeter-wave spectrums. results confirm that provide accurate flexible design rules adjustment, allows potential advances display-integrated applications.