Tag: RF Basics
What is physical significance of IP3, why it is more important in Receiver Chain ?
Understanding physical significance of 3rd order Intercept Point (IP3) When an amplifier or other circuit becomes non-linear, it will begin to produce harmonics of the amplified inputs. The second, third, […]
What are RF Splitters and Combiners ?
RF Splitter Basically, a splitter is a passive device which accepts an input signal and delivers multiple output signals with specific output phase and amplitude characteristics. In the following figure, […]
VSWR of BTS Antenna port, Why it gets degraded, Good VSWR and Bad VSWR
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 BAW Filter ? Why is it suited for 3G, 4G and 5G applications? What are its merits over SAW filter ?
BAW filter (Bulk Acoustic Wave) is a filter whereby the electrical input signal is converted to a acoustic wave by so-called interdigital transducers (IDTs) on a piezoelectric substrate such as […]
Revising Superheterodyne Transceiver Radio Architecture, Design Considerations, Image issue resolution
Superheterodyne is the most popular architecture used in communication transceivers. It is based on the heterodyne process of mixing an incoming signal with an offset frequency local oscillator (LO) in […]
What is RBW of instrument, why it is important for signal analysis ?
RBW stands for Resolution Bandwidth; it is used to view distinctly two very closely spaced signals in frequency domain. Two input signals can be seen as two spectrum waveforms only if […]
What is PAPR (Peak to average power ratio), Why it matters to Power Amplifier ?
The PAPR is the relation between the maximum power of a sample in a given OFDM transmit symbol divided by the average power of that OFDM symbol. In simple terms, PAPR […]
What is Duplexer, How it is used, Advantages and Disadvantages ?
A duplexer is a three port filtering device which allows transmitters and receivers operating at different frequencies to share the same antenna. A duplexer typically consists of two band pass […]
How are the RF signals transmitted and received ?
There are three basic requirement for communication (through RF Signals) to happen between two devices: Two or more devices that want to communicate Communication medium Few set of rules Many […]
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 […]