Conclusion

Microwave holography - Principle and applications

Figure 1 - Holographic recording and playback

Figure 2 - Comparison of one of the first microwave holography systems in 1971 and a current system

Figure 3 - Hologram recording

Figure 4 - Principle of object image reconstruction

Figure 5 - Diagram of a FINCH recorder [14]

Figure 6 - Principle of synthetic aperture radar (SAR)

Figure 7 - The 70-meter diameter antenna of the Deep Space Network at Goldstone

Figure 8 - Magellan probe

Figure 9 - Communications based on holographic MIMO antennas between users

Figure 10 - Metasurfaces

Figure 11 - Principle of a holographic metasurface

Figure 12 - Example of a metasurface composed of metallic patterns (in yellow) on a dielectric substrate (in green)

Figure 13 - Schematic illustration of a three-dimensional hologram for information encryption [38]

Figure 14 - Active metasurface