RF refers to the frequencies that fall with in the electromagnetic spectrum associated with radio wave propagation. RF current creates electromagnetic fields when applied to an antenna that propagate the applied signal through space. Electromagnetic wave based communications have been utilized for many decades especially for wireless voice communications and data communications. The frequency of RF signal is inversely proportional to the wavelength of the field. The rate of oscillation for the radio frequencies is in the range about 30 KHz to 300 GHz.
RF waves that have been modulated to contain information are called RF signals. These RF signals have some behaviors that can be predicted and detected and they can interface with other signals. Antennas must be used for receiving the radio signals. These antennas will pick up more number of radio signals at a time. By using radio tuners particular frequencies can be picked up. There are some free bands available which are used for remote controlling applications. These are also called ISM (Industrial, Scientific and Medical) bands. The most attractive frequency band is 434 MHz.
The payload data needs to be modulated on the RF carrier. Two simple modulation techniques Amplitude shift Keying (ASK) and Frequency shift keying (FSK) are popular for this. For power consumption reasons, ASK is mostly implemented as ON-OFF keying (OOK). The challenge is finding an antenna design or concept which represents a perfect compromise between cost and performance. A clear RF design is necessary for meeting regulations.
FAR-HAT Technologies mission is to provide high quality telecommunications and data systems to our customers. RF Communications is charged with the proper care and maintenance of our customers' telecommunications systems so as to provide maximum efficiency and usefulness. We will attend to all emergencies with the swiftest and most effective response possible, so as not to leave our clients without telecommunications services. We will exceed our customers' expectations by providing the highest quality services available anywhere.
RF communication mainly used for wireless data, voice transfer applications, and home automation applications, remote control applications and in industry oriented applications.
For example, in home automation applications we can use RF controlled switches instead of conventional switches. For this purpose a RF remote can be used for controlling lights and other devices without moving to other places. This application is mostly useful for physically handicapped people. In industry oriented applications for controlling robots and vehicles RF communication can be used. The robot vehicles are generally used in risky operations which can’t be performed by humans. For this a transmitting unit is needed for controlling the robot vehicles movement.