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 […]

ACLR / ACPR

ACPR stands for Adjacent Channel Power Ratio and ACLR stands for Adjacent Channel Leakage Ratio. Though the name is different, both terms are used interchangeably to represent the same thing. […]