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A highly stabilized electro-optic imaging system for measuring both the amplitude and phase of electric fields from on-wafer millimeter waveguides is presented. The near-field distribution at 95 GHz, launched with a GSG type on-wafer probe on a coplanar waveguide, is measured with a minimally invasive micro optic probe.
We demonstrate an endoscopic probing system to measure field distribution through a W-band waveguide. The electric fields propagating inside a WR-10 waveguide are measured utilizing W-band harmonics of a femtosecond laser with a minute photonic probe.
A radial power-combiner design is presented using broadband probes and a radial cavity configuration. The 8:1 combiner (which can also be used as a power divider) is demonstrated experimentally in both single-ended and differential configurations. The broadband probe is composed of cylindrical conductors and dielectric spacers, arranged on a rod for mechanical stability. The proposed radial power...
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