Tag: RF systems
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Features of FM Receivers
FM receivers employ heterodyne principle. The FM broadcast signals lie in the frequency range between 88 MHz and 108 MHz. The intermediate frequency (IF) of a FM receiver is 10.7 MHz which is much higher than the IF value of 455 kHz in AM receivers. Let’s consider the block diagram of an FM receiver below:…
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RF Power and Voltage Measurement
RF system’s output power level is often the key factor in the design and ultimately the performance of virtually all radio frequency and microwave equipment. For the measurement of average power, a sensor along with a calibrated power meter is connected with the RF transmitter. Initially, if the output of the sensor is switched OFF…
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Radio Frequency Spectrum Analyser
Spectrum analysis is the analysing of signals in terms of their frequencies. The spectrum analyser can measure the frequencies present in a complex signal or the frequencies resulting from modulation on a carrier. The spectrum analyser is a measurement instrument that displays frequency components of a signal. Each frequency component contained in the input signal…
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Radio Frequency (RF) and Microwave Spectral Analysis
The display of electromagnetic radiation as a function of wavelength is termed to as electromagnetic spectrum. Based upon the wavelengths, the spectrum is divided into various frequency bands as illustrated in the figure below: With the rapid advancement of wireless technology and satellite sensor technology, there is need for more and more accurate field measurements…