Interested In Radio Frequency? Here’s What You Need To Know About Rf Communications
If you are interested in radio frequency, there are basic things first that you need to learn about the subject. RF communications, in the most basic terms, is a technology based on the laws of physics. It mainly describes electromagnetic energy waves’ behavior.
From the Basics: Radio Frequency
Radio frequency is already more than 100 years old. Yes, from that period, it can be easily said now that the world is surrounded with radio frequency communication signals. As a technology, radio frequency allows people, everyone in the world to broadcast signals from one to point to another. It does not matter what the purpose is for, whether the broadcasted signals are for listening to news on the radio and even in communicating signals that are highly encrypted from any military post in order to spy a plane flying in the sky.
As said, this technology has long been discovered and put to application in the world. However, although many developments were already made concerning this over the years, it is still far from being completed. The thing is, comparing to its status in the past, it can be said a lot has happened and has improved in this technology since then. In fact, experts are saying that the capabilities of today’s RF technologies have already exceeded its earliest pioneers’ wildest dreams.
Different Frequencies Are Involved in RF Communications
Each of these frequencies is used for a range of applications. The use of radio has long been regulated and highly controlled. This is the main reasons why specific frequencies are now also dedicated for a more specific application. A good example would be the frequencies used for telegraphs and distress signals. In this case, there is a specific set of frequencies these applications can only use, which are those between 490 and 510 KHz.
There are more applications for which frequencies are used for. Among these are the different frequencies set for amateur radio, global positioning systems, police scanners, wireless internet and LANS, and microwave ovens. But regardless of the application, lower frequencies are generally dedicated the most basic of applications. Those higher frequencies are intended for use in applications that are more specific and private.
Should You Operate on a Higher Frequency?
It has already been established that the frequency spectrum is now allocated for specific use and applications. Such fact is the reason why applications are being pushed into much higher frequencies. Every time a new application is discovered, it is instantly dedicated with higher frequencies in order to efficiently accommodate them. Like all other things, each of the frequency in the spectrum comes with each set of advantages and disadvantages. Both these aspects are mainly concerned about propagation efficiency, signal strength, noise and interface.
How RF Communications Works
It simply works by producing electromagnetic waves at a specific source. Once produced, these electromagnetic waves are picked at a certain destination. These electromagnetic waves are traveling through air at a speed that is close to the speed of light. As for the electromagnetic signal’s wavelength, the higher the frequency is, the shorter its wavelength is. In terms of performance, it can be said that it is the longer wavelengths which can better provide it. Longer wavelengths normally travels at a much greater distance and is capable of penetrating through as well as around objects, which it is better at than those signals having shorter wavelengths.
Other than these, those interested in RF Communications must be aware that FCC is just one of the regulatory bodies controlling and regulating use of frequencies. And if there is a generally accepted band worldwide, that would be the 2.4 GHz band.