What is SAW Filter ?

A Surface Acoustic Wave filter, or SAW filter is a filter whereby the electrical input signal is converted to a acoustic wave by so-called interdigital transducers (IDTs) on a piezoelectric […]

dB , dBm Terminology

I keep seeing people using the terms “dB” and “dBm”, interchangeably, when they actually mean very different things. So, here’s a little background on the correct usage of the terms. […]

Radio Frequency Bands

Radio frequency (RF) is any of the electromagnetic wave frequencies that lie in the range extending from around 3 kHz to 300 GHz. Following is the radio frequency spectrum table divided in different bands: S/N Designation […]

1dB Compression Point (P1dB Point)

When operating in the linear region of a device (such as power amplifier, mixer etc.), gain through that device is constant. As the input power is increased, a point is […]

VSWR

Impedance mismatches in a radio-frequency (RF) electrical transmission line cause reflection of rf power and thus power loss. VSWR is a way to measure transmission line imperfections. VSWR stands for Voltage […]

Mobile Phone Architecture

When we say a mobile, it is not just a piece of plastic/metallic body, as it looks from outside, there are lots of different components/modules inside that mobile. This article […]

Noise Figure

Noise figure (NF) and noise factor (F) are measures of degradation of the signal-to-noise ratio (SNR), caused by components in a radio-frequency (RF) signal chain. It is a number by which the performance of an amplifier or a […]

CPRI – A High Speed Link

Today’s wireless operators face competitive pressure to reduce the rising cost of base stations, to provide higher bandwidth and for better quality of service. Traditional coaxial-based systems on cell towers […]