Calculators
Transmission
Microstrip, stripline, coaxial, CPW, waveguide, Z_in and 22+ more calculators.
S-Parameters
S-Parameter
Upload Touchstone — plot, Smith chart, cascade, de-embed and stability circles.
Antennas & Arrays
Phased Array
Real-time ULA/URA beam steering, tapering, grating lobes and patch antenna design.
LNA
MIX
IF
ADC
NF cascade
Receiver Chain
RX Chain
Cascaded NF, IIP3, gain budget, LC filter design and link budget calculator.
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Q
RF Theory
The RF
23 visual guides — radar, PLL, modulation, noise, filters, amplifiers and mixers.
RF Passives
Filters &
LC filters, stubs, Wilkinson dividers, attenuators, couplers and impedance matching.
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✨ Competitive Exam Question Bank
GATE ECE · ISRO · DRDO · PSU · IES/ESE
220+ exam-style questions with full solutions, difficulty badges and progress tracking across Transmission Lines, Antennas, S-Parameters, EM and Microwave topics.
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GATE & PSU Question Bank
220+ questions — GATE ECE, ISRO, DRDO, PSU, IES with full solutions
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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
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Radar & Modulation
FMCW, OFDM, IQ plane, phasors, EVM and constellations
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PLL & Oscillators
Phase noise, Leeson's equation, VCO design, ΣΔ
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RF Amplifiers
LNA design, noise figure, gain, stability, P1dB and IIP3
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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
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Transmission Lines
Reflections, VSWR, Smith Chart, stubs and matching
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Filter Theory
Butterworth, Chebyshev, elliptic, SAW/BAW, group delay
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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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