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Definition of "omnidirectional antenna" |
An omnidirectional antenna is a wireless transmitting or receiving antenna that radiates or intercepts radio-frequency electromagnetic fields equally well in all horizontal directions in a flat, two-dimensional geometric plane. Omnidirectional antennas are used in most consumer RF wireless devices, including cellular telephone sets and wireless routers. / The Bell 202 modem was an early modem developed by Bell System. It specifies audio frequency-shift keying to encode and transfer data at a rate of 1200 bits per second, half-duplex using differential phase-shift keying modulation. / an antenna that radiates power equally in all directions in at least one plane through its radiation center, but whose radiation pattern may vary for other such planes. |
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