Smith chart
E864053
The Smith chart is a graphical tool used in RF engineering to analyze and design transmission lines and matching networks by representing complex impedances and reflection coefficients.
Statements (52)
| Predicate | Object |
|---|---|
| instanceOf |
engineering diagram
ⓘ
graphical tool ⓘ nomogram ⓘ |
| assumes | reference impedance ⓘ |
| basedOn | complex reflection coefficient plane ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| createdBy | Phillip H. Smith NERFINISHED ⓘ |
| field |
electrical engineering
ⓘ
microwave engineering ⓘ radio-frequency engineering ⓘ |
| hasCoordinateSystem | polar coordinates ⓘ |
| hasDigitalForm |
Smith chart display in vector network analyzers
ⓘ
computer-aided Smith chart software ⓘ |
| hasFeature |
VSWR circles
ⓘ
circles of constant conductance ⓘ circles of constant reactance ⓘ circles of constant resistance ⓘ circles of constant susceptance ⓘ constant reflection coefficient magnitude circles ⓘ impedance and admittance duality ⓘ outer boundary corresponding to unity reflection coefficient magnitude ⓘ radial lines of constant reflection coefficient angle ⓘ |
| hasVariant |
admittance Smith chart
NERFINISHED
ⓘ
combined impedance-admittance Smith chart NERFINISHED ⓘ impedance Smith chart NERFINISHED ⓘ |
| inception | 1930s ⓘ |
| maps |
load impedance to reflection coefficient
ⓘ
reflection coefficient to load impedance ⓘ transmission line position to phase of reflection coefficient ⓘ |
| relatedTo |
S-parameters
ⓘ
reflection coefficient ⓘ standing wave ratio ⓘ transmission line theory ⓘ |
| represents |
complex reflection coefficient
ⓘ
normalized admittance ⓘ normalized impedance ⓘ |
| typicallyUses |
50 ohm reference impedance
ⓘ
75 ohm reference impedance ⓘ |
| usedFor |
admittance matching
ⓘ
analyzing transmission lines ⓘ designing impedance matching networks ⓘ designing transmission lines ⓘ impedance matching ⓘ stability analysis of RF amplifiers ⓘ visualizing complex impedances ⓘ visualizing reflection coefficients ⓘ visualizing standing wave patterns ⓘ |
| usedIn |
RF circuit design
ⓘ
antenna matching ⓘ microwave network analysis ⓘ network analyzer measurements ⓘ transmission line education ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.