DOI: 10.1109/TMTT.2024.3519424   IEEEXplore: https://ieeexplore.ieee.org/document/10819002    

2-layer CP-feed and LP-feed multichannel triple-band reflective metasurfaces, each with a large frequency ratio and a 147.9 mm radius

7.5 GHz (C-band), 18.5 GHz (K-band), 29 GHz (Ka-band)

A spin-decoupling strategy and a full-polarization decoupling strategy are each demonstrated with consideration for mutual coupling influences between C band , K / Ka band cells, and a phase coding strategy for each unit cell. This foundation enables the metasurfaces (MSs) to achieve triple-band independent control of dual-CP waves and full-polarized waves. 3x3-bit cells for the C-band MS layer and 2x2-bit cells for the K and Ka band MS layer are simulated and implemented

Multiband and dual-circular polarization satellite EM transmitters, and Internet of Things with joint implementation of microwave and millimeter wave communications.

6 channels for CP-feed left-hand ((LHCP) and right hand (RHCP) beam polarization states at C, K and Ka bands; 12 channels for LP-feed for x-, y-, LHCP and RHCP beam polarization states. >30.6 dB / >30.8 dB / >23.7 dB XPL (cross-polarization level) for CP-feed; >20.4 dB / >16.8 dB / >17.5 dB XPL for LP-feed. >20.3 dB / >26.3 dB / >26.6 dB SSL (side-lobe level for CP-feed; >16.6 dB / >17.3 dB / >17.3 dB SSL for LP-feed. 8% / 11,8% / 5.6% 2dB Gain BW for CP-feed; 8% / 12.1% / 7.1% 2dB Gain BW for LP-feed.