Antennas are crucial components in radio and television broadcasts because they convert electric energy into radio waves. This capturing property is what enables broadcasters to stream programs into subscribers’ homes.
Antennas are differentiated based on wavelengths and whether they can receive electromagnetic signals from one or more directions (directional and omni-directional). Those meant for radios cannot be used on TVs and vice versa.
Radio antennas
Radio antennas are primarily used in cars as television has slowly replaced radios. Those unable to afford TVs or receive signals make up a chunk of the buyer base.
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• Car radios: Car radio antennas are typically omni-directional (able to receive signals from multiple locations). They don’t transmit signals, however. Antennas are not large in keeping with the overall aesthetics and size of vehicles.
• CB radios: Citizens’ Band radio or CB radio allows short distance communication between users. Using low frequency wavelengths, range extends to about a maximum of 1,000 feet and the antennas themselves are very long, as much as 10 feet in height.
CB radios are generally used between vehicles as broadcast takes place between the two.
• Satellite radios: Satellite radios work differently than car and CB radios. They’re directional (one direction), the antennas point towards the satellite’s location and don’t have to be mounted outside a vehicle. Reception quality can be terrific and the range of channels included in a subscription package is very vast. However, atmospheric issues like bad weather can destroy signals.
• Two-way radios: Two-way radios function like CB radios, but are much smaller and don’t have to b