Semiconductor mounting and matching assembly

Wave transmission lines and networks – Coupling networks – With impedance matching

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333245, H01P 508

Patent

active

043652140

ABSTRACT:
A semiconductor mounting and matching assembly capable of performing over a frequency range to 20 GHz and higher comprising a coaxial transmission line having a first portion with a first end for receiving radio-frequency signals and providing an input impedance and a second portion with a second signal output end providing a termination characteristic impedance. A semiconductor diode which is hermetically sealed within and removable with the second portion is mounted at the second end and has a load resistance terminating the transmission line. The transmission line has a plurality of sections for providing elements of a network which transforms the input impedance and matches the termination characteristic impedance of the second end of the transmission line to the load resistance of the semiconductor device. The elements of the network are provided by the configurations and discontinuities of the sections of the transmission line and the capacitive and inductive properties provided by the semiconductor device, whereby the network incorporates therein the parasitic reaction elements of the semiconductor device so that said assembly transmits radio-frequency signals from its input end to the semiconductor device at its output end with low reflection and attenuation over a wide-band of frequencies.

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