The antenna is an arrangement of aerial electrical conductors designed to transmit or receive radio waves that is a class of electromagnetic waves. In other terms, antennas mainly convert radio frequency electrical currents into electromagnetic waves. Antennas are used in systems such as radio and television broadcasting point-to-point radio commun...
The omni directional antenna is an antenna system that radiates power uniformly in all directions. The only 3 dimensional omni directional antenna is the isotropic antenna, a hypothetical construct derived from actual antenna radiation patterns and used as a suggestion for specifying antenna gain and radio system effective radiated power. Practical...
An antenna that is able to receive signals from many directions is called a multi directional antenna. There are many size and shapes of multi directional antennas. They have different features. There are mainly two types of multi directional antennas, one being the indoor antenna and the other being the outdoor antenna. The indoor antennas can be ...
Television antenna signals are strongest and reception is generally the best when the station's transmitting tower is in clear line of vision with the home receiving the broadcast. Mountains, buildings or trees that block this line of sight tend to weaken and degrade the received signal. The signal also becomes weaker as it travels further from the...
The transmission of TV programs to the home and office is via coaxial cable. Since they were already wired into so many homes, cable TV companies have had great success selling Internet access. Unlike the other cable service, Internet via cable does not have distance limitations. Cable television or community antenna television is a system of provi...
Being able to talk on a handheld gadget without wires crossways the world is really a great achievement in technology. Few people stop and imagine about this minor miracle. However, when someone stuck somewhere unable to make a call because of a poor cell signal, the appreciation for this technology can be tested. Regrettably, cellular service prov...
The elements of the antenna array means the collection of all the similar radiation and elements related to the antenna, where the counting of the elements starts from 1 till N number. The similarity of the elements is judged on the basis of the same frequency, which means to derive voltage of each element one has fixed amplitude and phase angle. T...
While watching television the viewer is in a very relaxed mood and is absolutely entertained by the scenes. He can improve the utility of the time spent in watching television by performing some shoulder exercises. By this method, he can achieve dual gains of entertainment and body fitness simultaneously.
A good way to get an aerobic exercise is to use a rowing machine. And rowing while watching TV can be fun. Rowing moves one’s body through a wider range of motion than most other activities. It allows one to stretch his muscles and rotate his joints. Exercise rowing machines build muscular strength and endurance by working out muscles in arms, legs...
Dumbbells are those pieces of equipments that are used specifically in weight training. And is considered as a type of free weight in the category of gym equipments. Dumb bells are usually meant opt be held in one hand. For this reason dumb bell always comes in pairs. The origin of dumb bells is rooted in India, wh...