Tag: RF
What are the important parameters to look for while choosing PCB material ?
In order to design PCBs intelligently it becomes important to understand, among other things, the electrical properties of the board material. Understandably, these materials are the foundations for many circuits, […]
How to choose an Antenna for your application ?
Choosing an antenna can be a difficult task, there are several parameters that need to be taken into consideration. Although It is important to examine several physical, electrical, and economical […]
Explain VSWR of BTS Antenna port, Why it gets degraded, What is a good VSWR and bad VSWR value ?
VSWR is a way to measure transmission line imperfections which is generally caused by the impedance mismatch, in this case between BTS output port and antenna connected to it. Physical […]
What is 90nm, 45nm or 5nm technology, why it ends Moore’s Law, and what’s Next ?
90 nm. 45 nm. 5nm If you follow computer processors, chipsets, radio or video cards very closely at all, you have likely heard at least a passing reference to “process size”. But […]
What is VBW, how it is different from RBW ?
VBW stands for Video Bandwidth; helps improve resolution of very weak signals in the presence of the noise signal. It is post detection filter bandwidth which just smooths out signal of interest. […]
What is RRH (Remote Radio Head), How it is connected to BBU (Base Band Unit) ?
The remote radio head (RRH) contains the base station’s RF circuitry plus analog-to-digital or digital-to-analog converters and up/down converters. It is sitting on top of cell tower that mainly performs […]
What are E-UTRA Test Models (E-TM) in LTE ?
The E-UTRA test models (E-TM) are set of signals defined by 3GPP for the radio frequecy standard testing of LTE device (it may be eNodeB or UE) transmitter chain. The […]
What is Skin Depth, Why it matters in Radio Frequencies ?
Skin depth is a measure of how far electrical conduction takes place in a conductor, and is a function of frequency. At DC (0 Hz) the entire conductor is used, no […]
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 […]
RF Sampling, making smaller base station for 3G, 4G, 5G Systems
“RF sampling” is the technology of digitizing an RF signal with an ADC directly, without an analog frequency conversion to a lower IF (intermediate frequency) or baseband (Zero IF) before […]