Wave transmission lines and networks – Attenuators
Patent
1991-06-13
1993-03-16
Gensler, Paul
Wave transmission lines and networks
Attenuators
333 28R, H03H 724, H01P 122
Patent
active
051948346
ABSTRACT:
Apparatus and a method are disclosed for providing a microwave attenuator system using distributed (transmission line) reactive elements to achieve a reduction in the transmitted electrical signal amplitude. The attenuator system includes a fixed attenuator unit and an adjustable attenuator unit. The fixed attenuator unit contains a "T" resistive attenuator component. Transmission line resonator components are added to the attenuator component to provide frequency selectively. The transmission line resonator components are coupled to the resistive attenuator component in such a way as not to compromise the impedance match of the transmission line. The step adjustable loss component includes shunt transmission lines coupled to the center conductor of the transmission line by means of a spring contacting mechanism. The shunt transmission lines include preselected resistive elements. The preselected resistive elements provide incremental known attenuation characteristics for manual fine response step adjustments.
REFERENCES:
patent: 3648200 (1972-03-01), Harrison et al.
patent: 4117425 (1978-09-01), Bacher
patent: 5039961 (1991-08-01), Veteran
Bacher Helmut
Bourne, Jr. Clyfton W.
Knott Bradley
Cates Charles E.
Gensler Paul
Holloway William W.
Semflex, Inc.
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