Antennas have a kind of lobe projecting from where mounted. So by moving the antenna it is possible to receive maximum signal and that is referred as orientation.
The maximum RF value that can be obtained is 1.0. This means that the substance travels the full distance of the chromatography medium being used. Any RF value greater than 1 is not physically possible.
The size of an antenna depends upon the frequecny of the RF signal and the gain.
Yes, if it has an antenna input connector, (RF in).
Using an Antenna and Receive RF Chain
The source is the RF current in the transmitting antenna.
Zero
An active antenna is powered antenna, this includes a RF amplifier and a power supply so it must be "plugged in" somewhere. A standard "passive" antenna has no amplifier.
Yes. An antenna is only used to receive or send a signal. A RF signal travels throughout any air medium independently of the existence or not of an antenna. Of course you will need an antenna if you want to receive the signal (which has to have, by the way, more or less the same lenght of the wavelength of the RF signal), but the propagation of a electromagnetic wave doesn't need a physical support. You can see an example with the radiotelescopes. They receive signals which come from the outer space without any physical support. Electromagnetic waves (and RF signal is one kind of them) doesn't need any physical media to travel (they travel in vacuum too!)
If it is widescreen and has an antenna (RF) input.
The parabolic antenna is really not an antenna at all - but a collector/reflector, which catches and concentrates RF (radio frequency) into a tiny antenna mounted above the dish, pointed into the dish. Since satellites transmit at very high frequencies (microwave), the actual antenna can be shorter than one inch. To strenghen the signal and make aiming the antenna at the satellite easier, the parabolic reflector picks up a wider area of RF.
The source is the RF current in the transmitting antenna.
An RF (Radio Frequency) input is the technical term for a coaxial/antenna input on the back of a television. This input is often referred to as simply 'cable' or 'cable vision'.