A Tutorial on Optical Feeding of Millimeter-Wave Phased Array Antennas for Communication Applications

Figure 10

Phase control using different physical paths in free-space optics: (a) using a rotary mirror and a plane reflector, (b) employing a mechanically positioned prism, and (c) being based on a white cell. Solid and discontinuous time represent paths with different lengths and . Arrows indicate the displacement/rotation for obtaining different lengths.

(a)

(b)

(c)