Gunn diode
E708818
A Gunn diode is a semiconductor device that generates microwave-frequency oscillations by exploiting the Gunn effect in materials like gallium arsenide, commonly used in high-frequency oscillators and radar systems.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Gunn diode canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8021369 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Gunn diode Context triple: [Esaki diode, relatedTo, Gunn diode]
-
A.
Esaki diode
The Esaki diode is a heavily doped semiconductor tunnel diode that exhibits negative differential resistance, enabling high-speed and microwave-frequency electronic applications.
-
B.
Shockley diode equation
The Shockley diode equation is a fundamental formula in semiconductor physics that describes the current–voltage relationship of an ideal p–n junction diode.
-
C.
gallium arsenide
Gallium arsenide is a compound semiconductor material known for its high electron mobility and direct bandgap, widely used in high-frequency and optoelectronic devices such as microwave integrated circuits, LEDs, and laser diodes.
-
D.
Electron Pump
Electron Pump is a fictional advanced energy-transfer device in Isaac Asimov’s novel "The Gods Themselves," enabling the exchange of matter and energy between parallel universes with catastrophic side effects.
-
E.
Maser
Maser is a small town in the Veneto region of northern Italy, noted for its Renaissance architecture and association with the architect Andrea Palladio.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Gunn diode Target entity description: A Gunn diode is a semiconductor device that generates microwave-frequency oscillations by exploiting the Gunn effect in materials like gallium arsenide, commonly used in high-frequency oscillators and radar systems.
-
A.
Esaki diode
The Esaki diode is a heavily doped semiconductor tunnel diode that exhibits negative differential resistance, enabling high-speed and microwave-frequency electronic applications.
-
B.
Shockley diode equation
The Shockley diode equation is a fundamental formula in semiconductor physics that describes the current–voltage relationship of an ideal p–n junction diode.
-
C.
gallium arsenide
Gallium arsenide is a compound semiconductor material known for its high electron mobility and direct bandgap, widely used in high-frequency and optoelectronic devices such as microwave integrated circuits, LEDs, and laser diodes.
-
D.
Electron Pump
Electron Pump is a fictional advanced energy-transfer device in Isaac Asimov’s novel "The Gods Themselves," enabling the exchange of matter and energy between parallel universes with catastrophic side effects.
-
E.
Maser
Maser is a small town in the Veneto region of northern Italy, noted for its Renaissance architecture and association with the architect Andrea Palladio.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
microwave oscillator device
ⓘ
semiconductor device ⓘ |
| discoveredBy | J. B. Gunn NERFINISHED ⓘ |
| discoveredYear | 1963 ⓘ |
| doesNotRelyOn | p-n junction ⓘ |
| exhibitsProperty | negative differential resistance ⓘ |
| exploitsEffect | Gunn effect NERFINISHED ⓘ |
| generates |
RF power
ⓘ
microwave oscillations ⓘ |
| hasAdvantage |
compact size
ⓘ
no need for external resonant cavity in some designs ⓘ relatively low cost for microwave generation ⓘ simple structure ⓘ |
| hasConductionType | bulk negative differential resistance ⓘ |
| hasLimitation |
efficiency decreases at very high frequencies
ⓘ
limited output power compared to some vacuum devices ⓘ |
| hasRegion | active n-type region ⓘ |
| hasStructure | n+–n–n+ structure ⓘ |
| isBasedOn | transferred electron mechanism ⓘ |
| isClassifiedAs |
transferred electron device
ⓘ
two-terminal device ⓘ |
| isUsedAs |
frequency reference in some microwave systems
ⓘ
local oscillator ⓘ microwave source ⓘ |
| isUsedIn |
automatic door openers
ⓘ
industrial level and distance measurement sensors ⓘ solid-state radar front-ends ⓘ |
| namedAfter | J. B. Gunn NERFINISHED ⓘ |
| operatesInFrequencyRange |
microwave frequencies
ⓘ
millimeter-wave frequencies ⓘ |
| operatingMode |
limited space-charge accumulation mode
ⓘ
quenched domain mode ⓘ transit-time domain formation ⓘ |
| requiresBiasCondition | high electric field across active region ⓘ |
| requiresBiasType | DC bias ⓘ |
| typicalFrequencyRange | 1 GHz to 100 GHz ⓘ |
| usedIn |
frequency generators
ⓘ
intruder alarm systems ⓘ local oscillators in receivers ⓘ microwave communication links ⓘ microwave oscillators ⓘ microwave test equipment ⓘ microwave transceivers ⓘ motion detectors ⓘ police radar speed guns ⓘ radar systems ⓘ |
| usesMaterial |
gallium arsenide
ⓘ
gallium nitride ⓘ indium phosphide NERFINISHED ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Gunn diode Description of subject: A Gunn diode is a semiconductor device that generates microwave-frequency oscillations by exploiting the Gunn effect in materials like gallium arsenide, commonly used in high-frequency oscillators and radar systems.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.