What is SAW Filter ?
A Surface Acoustic Wave filter, or SAW filter is a filter whereby the electrical input signal is converted to a...
Category: RF Basics
LTE Base Station Classifications
As per 3GPP reference 36.104 release 12, there are four classes for the base stations based on the rated power...
What is RF Isolator, How to choose it ?
An RF Isolator is a two port device that is unidirectional, means it passes the RF signal in one direction...
Massive MIMO
In a wireless network, two wireless nodes communicate by transmitting and receiving data on a radio channel. This channel uses...
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...
Vector Network Analyzer
Vector network analyzer (VNA) is one of the most essential RF and microwave measurement instrument. VNA is commonly used to measure...
RSRQ (Reference Signal Received Quality)
RSRQ is th Reference Signal Received Quality and it can be defined using following. RSRQ= (N* RSRP)/RSSI As per the...
Insertion Loss / Return Loss
Insertion Loss, Return Loss and Attenuation In order to understand losses, study the figure above. Microwave power is sent down...
4G LTE EUTRAN Bands
LTE Bands and Available Bandwidth Band Uplink-fmin Uplink-fmax Downlink-fmin Downlink-fmax Available Bandwidth Duplex Mode Remark 1 1920 MHz 1980 MHz...
dB , dBm Terminology
I keep seeing people using the terms “dB” and “dBm”, interchangeably, when they actually mean very different things. So, here’s...