Abstract: A frequency-scalable device for interfacing a planar medium with a coaxial medium to propagate a primary signal, the device comprises a transition medium connectable between the coaxial medium and the planar medium. The transition medium suppresses excitation of secondary electrical signals by the primary signal when the primary signal is propagated through the transition medium at a frequency below an upper limit.

Abstract: In an embodiment, a system for measuring high frequency response of a DUT having improved power leveling includes a signal source, a modulator, an upconverter, and a leveling loop having dynamic gain adjustment. The signal source generates a test signal and the modulator modulates the amplitude of the generated test signal to target a requested power. The converter multiplies a frequency of the test signal. The leveling loop is configured to detect an intermediate frequency (IF) signal generated in response to the upconverted test signal. Modulation of the amplitude of the generated test signal by the modulator is adjustable based on the IF signal detected by the leveling loop.