Wave transmission lines and networks – Plural channel systems – Having branched circuits
Patent
1999-10-14
2000-05-30
Gensler, Paul
Wave transmission lines and networks
Plural channel systems
Having branched circuits
200181, 333105, H01P 110, H01H 5700
Patent
active
060695404
ABSTRACT:
An RF switch formed as a micro electro-mechanical switch (MEMS) which can be configured in an array forming a micro electro-mechanical switch array (MEMSA). The MEMS is formed on a substrate. A pin, pivotally carried by the substrate defines a pivot point. A rigid beam or transmission line is generally centrally disposed on the pin forming a teeter-totter configuration. The use of a rigid beam and the configuration eliminates the torsional and bending forces of the beam which can reduce reliability. The switch is adapted to be monolithically integrated with other monolithic microwave integrated circuits (MMIC) for example from HBTs and HEMTs, by separating such MMICs from the switch by way of a suitable polymer layer, such as polyimide, enabling the switch to be monolithically integrated with other circuitry. In order to reduce insertion losses, the beam is formed from all metal, which improves the sensitivity of the switch and also allows the switch to be used in RF switching applications. By forming the beam from all metal, the switch will have lower insertion loss than other switches which use SiO2 or mix metal contacts.
REFERENCES:
patent: 4203017 (1980-05-01), Lee
patent: 5638946 (1997-06-01), Zavracky
Berenz John J.
Lee Alfred E.
McIver George W.
Gensler Paul
TRW Inc.
Yatsko Michael S.
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