yagi antenna
Low frequency in general discourse; medium frequency in technical/radio communitiesTechnical, specialized
Definition
Meaning
A directional radio antenna consisting of a driven element connected to a transmitter or receiver, and several parasitic elements (reflector and directors) arranged in parallel to increase gain and directivity.
A highly directional antenna design commonly used for point-to-point communication, television reception, and amateur radio. The design allows it to focus transmitted or received energy in a specific direction while rejecting signals from other directions.
Linguistics
Semantic Notes
Named after its Japanese inventors, Hidetsugu Yagi and Shintaro Uda. Often shortened to 'yagi' in technical contexts. It's a subtype of 'parasitic array' antenna.
Dialectal Variation
British vs American Usage
Differences
Usage is identical in both varieties. The term is a technical loanword and is not subject to regional variation in meaning.
Connotations
Neutral technical term in both regions.
Frequency
Equally low in general usage, equally common in technical/radio/ham radio contexts in both the UK and US.
Vocabulary
Collocations
Grammar
Valency Patterns
The [engineer/operator] installed a yagi antenna on [the mast/the roof].A yagi antenna for [TV/amateur radio] consists of [multiple elements/a reflector].[Signal strength/Gain] is improved by using a yagi antenna.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “Point your yagi at the signal.”
- “It's not a dipole; it's a yagi.”
Usage
Context Usage
Business
Rare, except in telecommunications procurement or satellite link companies.
Academic
Used in electrical engineering, telecommunications, and physics papers on antenna theory.
Everyday
Virtually unused unless discussing TV reception, amateur radio, or emergency communications.
Technical
Standard term in radio engineering, amateur radio, and wireless communication design.
Examples
By Part of Speech
noun
British English
- The radio amateur carefully aligned his yagi antenna towards the continent.
- For the best Freeview signal, you might need a high-gain yagi.
American English
- The storm damaged the yagi antenna on the roof, disrupting the satellite internet.
- His new yagi for the 2-meter band significantly improved his contact log.
Examples
By CEFR Level
- A yagi antenna is often used for television.
- The antenna on that roof is a yagi.
- To improve reception, the technician replaced the old dipole with a directional yagi antenna.
- Yagi antennas are favored in amateur radio due to their excellent gain and directivity.
- The system's design incorporated a multi-element yagi antenna array to mitigate multipath interference and maximize the signal-to-noise ratio.
- While the yagi's forward gain is substantial, its operational bandwidth is relatively narrow compared to a log-periodic design.
Learning
Memory Aids
Mnemonic
Imagine a Yogi Bear trying to catch a TV signal with a long stick with many crossbars – 'Yogi' sounds like 'Yagi'.
Conceptual Metaphor
A SATELLITE DISH'S SKINNY COUSIN; A DIRECTED EYE FOR RADIO WAVES.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid calquing as 'яги антенна'. The standard Russian technical term is 'антенна типа "Волновой канал"' or 'антенна Яги'.
- Do not confuse 'yagi' with the Russian word 'ягода' (berry).
Common Mistakes
- Pronouncing it as /ˈjæɡi/ (like 'yappy') instead of /ˈjɑːɡi/.
- Using 'yagi' as a general term for any antenna.
- Misspelling as 'yaghi' or 'yagui'.
Practice
Quiz
What is the primary functional advantage of a yagi antenna?
FAQ
Frequently Asked Questions
Often, yes. Many traditional TV aerials are yagi antennas. However, not all TV aerials are yagis (some are log-periodic), and yagis are used for many other purposes beyond TV.
It is named after one of its two Japanese inventors, Dr. Hidetsugu Yagi, who, along with Dr. Shintaro Uda, published the seminal design in the 1920s.
Yes. Like most antennas, a yagi is reciprocal and works for both transmission and reception with the same directional characteristics.
A typical yagi has three types of elements: a single driven element (connected to the cable), one reflector (longer element behind the driven element), and one or more directors (shorter elements in front of the driven element) which create the directionality.