The definition of what it is, is actually in your question. It's a receiver that operates in the radio frequency spectrum. Anything that has a transmitter is said to transmit in radio frequency or `RF`. The term radio is short for radiotelegraphy, which has become generic over the years.
Where does the radio frequency start? Technically, it' at 10,000 hz and higher. That's not to say that there's lower frequency transmitters (The U.S. Gov't uses 2 hz. to reach our submarines when they're under water, but that's more of an exception than the rule. The radio frequency spectrum can extend into the gigahertz range for things such as satellite communications, and as our technology advances, we could eventually see frequencies in the teraherts.
So a radio frequency receiver is anything that will receive a a frequency in the radio frequency range.
Hope this helps,
Cubby
RF stands for Radio Frequency
When you receive on a Radio Frequency, you simply "listen" to the data on a particular radio frequency.
This can be a radio program with speech or music.
The actual purpose of the RF Transmitter is to transform audible frequencies so high up in frequency so that they become electromagnetic waves instead. This is the characteristics of ALL RadioWaves. Electromagnetic wavelengts of energy.
There are TWO commonly known methods of doing this FrequencyTransformation.
AmplitudeModulation: where one amplifies the transmitted energy on a fixed frequency according to the amplitude of the audible signal.
FrequencyModulation: where one keep the transmitted energy on a fixed current and then vary the frequency slightly according to the amplitude of the audible signal.
FrequencyModulation is in most cases preferable because one can then simply adjust the current down for small range and up for large range. Quite easy to do.
The purpose of a RF Receiver is to "decode"
In an FM Receiver it simply transform the frequency-variations of a set base frequency back to an audible frequency.
Then we use an Amplifier to enlarge this signal so that we can listen to it from a loudspeaker.
There are "other" methods of actually encode a signal for transmittion that will accordingly need a reverse method for decoding signal again.
Mainly used to transmit encoded data, but the principles are the same and one can use both methods for this.
One use different frequencies for different purposes.
Some frequencies are reflected better due to atmospheric conditions and can have a very very long range with little power. (Low frequencies)
Other frequencies are better for very short range but provide the ability for massive amounts of data.(Very High Frequencies)
As a baseline, the higher the frequency, the more information you can send in one frame of time (IE 1 second).
This does not mean that the speed of the magnetic waves of the higer frequencies move faster, they just shift/switch polarity faster.
Magnetic waves all move at the speed of light (in vacum).
Regards.
The tools for performing Radio Frequency Identification (RFID) would be a two-way radio transmitter-receiver and a magnetic field that powers and reads RFID's at a short distance.
It can get pretty complicated. You need a radio receiver, and you need to be close enough to the transmitter of the station you want to receive. Also, you need to know that station's transmit frequency, and tune your receiver to that frequency.
Receiver incremental tuning (RIT)--A transceiver control that allows for a slight change in the receiver frequency without changing the transmitter frequency. Some manufacturers call this a clarifier (CLAM) control.
a Whale of a good idea but its probably illegal.
A superheterodyne receiver is a Radio Frequency receiver method that multiplies the received signal frequency with a local oscillator frequency to get frequencies that are the sum and difference of the 2 frequencies. For example, if the received signal is 5MHz and the local oscillator frequency is 4MHz, they are multiplied together. 1MHz and 9MHz frequencies would be gotten. Usually the 1MHz is the Intermediate Frequency (IF). It will be admitted (through a band pass filter) later passed through the required electronic circuits for proper processing. There is also the method of the Variable Tuned Filter.
I would very much like to see you with greater frequency. What frequency will you be on? I can switch to another radio station by adjusting the frequency of my radio receiver.
To change the frequency on a radio controller car, you change the crystal in the transmitter and receiver.
radio frequency amplifier intermediate frequency( If strip) in a superheterodyne radio mixer /demodulator Audio amplifier
A radio receiver is an electronic device that receives radio wave/signal and convert the information carried by them to a usuable form through speaker. The principal functions of a radio receiver are frequency selection, amplification and detection of signals which are been convert back to its original form through the help of radio speaker.
You need a VHF radio antenna, a VHF radio receiver and of course a station broadcasting on the VHF frequency.
Most FM receivers use 10.7 MHz as the IF.
You would probably be using a radio receiver. It is possible you'd be using a transceiver, which combines the functions of a transmitter and a receiver.
The tools for performing Radio Frequency Identification (RFID) would be a two-way radio transmitter-receiver and a magnetic field that powers and reads RFID's at a short distance.
Is this sentence supposed to be question? Any superheterodyne receiver will have an IF amplifier. It doesn't matter whether TV or radio.
A radio telescope has two basic components, a large radio antenna and a radio receiver. It is used to detect radio-frequency radiation emitted by objects in space.
It can get pretty complicated. You need a radio receiver, and you need to be close enough to the transmitter of the station you want to receive. Also, you need to know that station's transmit frequency, and tune your receiver to that frequency.
to shift the frequency of information signal ,at the frequency domain to a higher frequency ...so the information can be transmitted to the receiver.