Tag: RF
What is directivity in a coupler ?
Directional couplers are four-port circuits where a defined amount of the electromagnetic power fed at the input port in a transmission line is coupled to a port (known as coupled […]
How to get better ACLR in TX chain ?
If you are trying to debug the bad ACLR in TX Chain or you are designing a TX for your system, then you must take care following points with regards […]
Amplifier Efficiency Concept, How Envelope Tracking (ET) helps better efficiency to Power Amplifiers?
Envelope tracking (ET) describes an approach to radio frequency (RF) amplifier design in which the power supply voltage applied to the RF power amplifier is continuously adjusted to ensure that the amplifier is operating at peak efficiency for […]
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 […]