Antennas are a crucial component of modern communication systems. They are devices that transmit and receive electromagnetic waves, allowing us to communicate wirelessly over long distances. Antennas are used in a wide range of applications, from television and radio broadcasting to mobile phones and satellite communication.
Definitions
An antenna is a device that converts electrical signals into electromagnetic waves and vice versa. It is a transducer that can transmit and receive electromagnetic waves. Antennas are used in various applications, including radio and television broadcasting, mobile communication, radar, and satellite communication.
Origin
The word antenna comes from the Latin word “antenna,” which means “sailyard.” The word was first used in the context of radio communication in the early 20th century. The concept of antennas dates back to the 19th century, when scientists discovered the existence of electromagnetic waves and began to experiment with ways to transmit and receive them.
Meaning in different dictionaries
The meaning of antennas varies slightly in different dictionaries. According to the Merriam-Webster dictionary, an antenna is “a metallic device for sending or receiving electromagnetic waves.” The Oxford English Dictionary defines an antenna as “a device that transmits or receives radio or television signals.”
Associations
Antennas are associated with various technologies, including radio and television broadcasting, mobile communication, radar, and satellite communication. They are also associated with scientific research and development in the field of electromagnetics.
Synonyms
Synonyms for antennas include aerial, transmitter, receiver, dish, and parabolic reflector.
Antonyms
Antonyms for antennas include cable, wire, and fiber optic.
The same root words
The word antenna has no other root words.
Example Sentences
- The television antenna on the roof of the house was damaged in the storm.
- The mobile phone has a built-in antenna that allows it to receive signals from the nearest cell tower.
- The radar antenna on the top of the building rotates to scan the surrounding area.
- The satellite antenna dish in the backyard allows us to receive satellite television signals.
- The scientists used a high-gain antenna to communicate with the spacecraft orbiting Mars.