The two most widely used locking bandwidth equations for injection locked oscillators, Adler's and Kurokawa's equations, are compared for the first time. Three differences are pointed out from the comparison: first, the absence of the factor

A highly efficient photodiode plus amplifier hybrid module in the mm-wave region is demonstrated. The design uses a broadband edge-coupled PIN photodiode and a MMIC amplifier interconnected through a microstrip matching circuit. An improvement of 9 dB in output power is demonstrated at 27 GHz compared to the same PIN diode connected to a 5OQ amplifier without matching.

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