Commercial applications of antennas range to transmission and receiving af and rf signals in radio receivers and television sets. Tv antennas or television antennas are manufactured in wide varieties for use in many consumer electronic appliances. Tv antennas or television antennas are available in variety of configurations for different applications. Short-wave antenna is suitable for a wide range of short wave, medium wave and long wave listening applications. There are no magic tv antennas that will deliver excellent tv reception in every location. The main factors determining reception are the distance and direction from the tv station transmitters to home. Other factors affect tv antennas include the transmitter's power and the height of its tower, the terrain between the tower and your antenna, and the size and location of any large buildings in the path of the transmission.
If you live within a few miles of the transmitter, and the signal path is relatively unobstructed, you may be able to get adequate reception using a small set-top indoor tv antenna. But as you move farther away, getting usable signal strength becomes trickier. This is where careful antenna selection and installation become essential.
Uni-directional tv antennas are designed to receive signals from one direction. Multi-directional tv antennas are able to receive signals from all directions. Uni-directional tv antennas are able to pull in signals from greater distances, and because they see in only one direction they are resistant to noise and multipath distortion (a problem created when an antenna receives reflections of the desired signal). Because multi-directional tv antennas see in many directions they are more likely to pick up noise, interference, and multipath distortion.
Indoor tv antennas are generally small, designed to be placed on or near your tv. Outdoor tv antennas tend to be significantly larger and are intended for roof- or attic-mounting. In general, the larger an antenna's surface area is, the stronger the signal it will provide. The relative strength of the signal an antenna can deliver to a tuner is referred to as gain and is measured in decibels (db). The higher the db rating, the greater the gain.
Nearly all outdoor tv antennas perform better than even the best indoor tv antennas. Along with their size disadvantage, indoor tv antennas have a height disadvantage, and are adversely affected by the walls of a house and even by movement of people in the room. Other sources of household interference include fluorescent lights, computers and cordless phones.
Gps antennas are widely used for gps receivers. Gps antenna comes with spectrum features like spiral helices, micro strip, planner rings and other multi-path resistance designs. Long wire hf antenna is largely used in different frequency ranges like short, medium, long wave receivers. Embedded antennas are used for blue tooth devices and short-range appliances such as wireless video and audio equipment, headsets, modems, mobile computers, mobile phones etc. Steerable beam antennas are available for both indoor and outdoor and widely used in wireless lan applications.
