⚡
Calculators
Transmission
Line Tools
Microstrip, stripline, coaxial, CPW, waveguide, differential pair, skin depth and more.
📡
S-Parameters
S-Parameter
Analysis Suite
Upload any Touchstone file — plot, Smith chart, cascade, de-embed and stability check.
📶
Antennas & Arrays
Phased Array
Visualiser
Interactive ULA / URA beam pattern with real-time steering, tapering and grating lobe detection.
🔗
Receiver Chain
RX Chain
Designer
Build cascaded NF and IIP3 chains, design LC filters and compute link budgets.
📖
RF Theory
The RF
Playbook
23 in-depth visual guides — radar, PLL, modulation, noise, filters, amplifiers, mixers and more.
🔧
RF Passives
Filters &
Matching
Attenuators, LC filters, resonators, Wilkinson dividers, directional couplers and impedance matching networks.
📘
RF Theory Guides
18 visual guides with SVG diagrams and worked examples
Explore ›
🎯
Interview Q&A Banks
245+ Easy / Medium / Hard graded questions with solutions
Start prep ›
📊
Radar & Modulation
FMCW, OFDM, IQ plane, phasors, EVM and constellations
Read ›
🔁
PLL & Oscillators
Phase noise, Leeson's equation, VCO design, ΣΔ
Read ›
📡
RF Amplifiers
LNA design, noise figure, gain, stability, P1dB and IIP3
Read ›
🔀
Mixers & Modulators
Conversion loss, image rejection, Gilbert cell, IQ mixers
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〰️
Noise in RF Systems
Thermal noise, Friis formula, noise temperature, NF budget
Read ›
〰
Transmission Lines
Reflections, VSWR, Smith Chart, stubs and matching
Read ›
🎚️
Filter Theory
Butterworth, Chebyshev, elliptic, SAW/BAW, group delay
Read ›
🏆
RF Knowledge Quiz
200+ questions, instant scoring and a downloadable certificate
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🏗️
RF System Architecture
Superheterodyne, direct conversion, dynamic range, AGC
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