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Since there is no unique solution for a particular RF applications, some guidelines are needed. This article looks at some such guidelines. An antenna transmits and receives electromagnetic (EM) radiation in free space. The wireless range of an antenna depends...
Among the different types of electromagnetic or EM waves, radio signals are used very widely in our lives. Cue in this widespread usage, they have a major effect on RF antennas themselves and RF antenna design. RF, visible, ultra-violet and infrared all comprise electromagnetic waves differing...
Today, almost all applications are expected to be wireless, consume very little power and have high data retention capability. For this, selection of an effective media at the physical layer is important. Today, several wireless devices featuring ZigBee protocol,...
Antenna polarisation (or polarization) is a very important consideration when choosing and installing an antenna and can mean as much as a 20db in signal loss if the receiver and transmitter antenna are not using the same polarisation. Most...
Smart antennas and smart antenna technology using an adaptive antenna array are being introduced increasingly with the development of other technologies including the software defined radio, cognitive radio, MIMO and many others. Smart antenna technology or adaptive antenna array technology...
While there are a lot of books out there on EM waves and antenna design, they have been written for a very wide range of engineers. Ranging from a novice to veterans, the books have to be made such...