RF Studio Labs
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Transmission Line Calculators
Impedance, wavelength, attenuation and phase velocity for every PCB and RF medium.
MicrostripLive→ StriplineLive→ Coaxial LineLive→ CPW / CPWGLive→ Rectangular WaveguideLive→ Differential PairNew→ Two-Wire LineLive→ Skin Depth & RsLive→
All calculators →
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S-Parameter Analysis
Upload any Touchstone file (.s1p–.s9p) — plot, cascade, de-embed and check stability in the browser.
S-Parameter PlotterLive→ Smith Chart PlotterLive→ Amplifier StabilityLive→ Cascade S-ParamsLive→ De-embeddingLive→ Group Delay & TDRLive→ VSWR / Return LossLive→ Γ Reflection Coeff.Live→
All S-param tools →
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Receiver Chain & Signal Design
Build RX chains with cascaded NF and IIP3, design filters, compute link budgets and convert RF units.
RX Chain DesignerNew→ LC Filter DesignLive→ Attenuator DesignLive→ RF Link BudgetLive→ LC ResonatorLive→ RF Unit ConverterNew→ dB / Power ConverterLive→
All signal tools →
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Antennas & Arrays
Antenna design calculators and an interactive phased array beam pattern visualiser with real-time steering.
ULA / URA Array VisualiserNew→ Patch AntennaLive→ Dipole / MonopoleLive→
All antenna tools →
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RF Theory — Visual Guides
18 in-depth theory pages — plain-English explanations with SVG diagrams, formulas, worked examples and interactive calculators built in.
All 18 guides →
Radar FundamentalsNew→
Echo principle, range equation, RCS, FMCW, Doppler, pulse compression — interactive range calculator included.
RF System ArchitectureNew→
Superhet vs zero-IF, full RX chain, image problem, FDD vs TDD, dynamic range. Interactive chain budget.
Antenna Arrays & BeamformingNew→
ULA vs URA, array factor, beam steering, tapering, grating lobes, massive MIMO — 5 guided experiments.
Modulation & IQ PlaneNew→
AM / FM / QPSK / QAM / OFDM with animated phasor, constellation gallery, EVM and IQ imbalance demo.
Power Amplifier TheoryNew→
PA classes A–F, P1dB, OIP3, PAE, Doherty, load pull, GaN vs GaAs vs LDMOS. Interactive PAE calculator.
PLL TheoryNew→
Charge pump, VCO, loop filter, phase noise, Leeson's equation, reference spurs, integer-N vs fractional-N.
Noise in RF SystemsLive→
Thermal noise, Friis cascade, sensitivity, IIP3, P1dB and dynamic range with interactive RX chain builder.
RF Filter TheoryLive→
Butterworth, Chebyshev, Bessel — LP prototype, denormalization, group delay and SAW/BAW explained.
Mixers & ModulatorsLive→
Conversion loss, IQ mixers, image freq, double-balanced topology, LO leakage and spur analysis.
RF Amplifier TheoryNew→
Gain definitions, P1dB, IP3, noise figure, LNA vs VGA vs PA, bias, stability circles.
Transmission Line TheoryLive→
Telegrapher's equations, VSWR, reflections, stubs, λ/4 transformer — 8 worked examples.
RF Link BudgetNew→
EIRP, path loss, sensitivity, fade margin — four worked examples: WiFi, LTE, satellite, radar.
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Interview & Exam Prep — 245+ Q&A
7 topic banks · 35 questions each · Easy / Medium / Hard graded · Full solutions with visual diagrams · Built by RF engineers for RF engineers.
All Q&A banks →
PLL Q&A BankNew→
Charge pump, loop filter design, phase noise, spurs, lock time, integer-N vs fractional-N.
Amplifier Q&A BankLive→
Gain, NF, P1dB, IIP3, stability, PA classes A–F, Doherty — 35 graded questions.
S-Parameter Q&A BankLive→
Two-port theory, Mason's rule, VNA calibration, stability, signal flow graphs.
Transmission Line Q&ALive→
VSWR, stubs, λ/4 transformers, TDR, dispersion — 35 graded questions with full worked solutions.
Mixer Q&A BankLive→
Conversion loss, IQ balance, LO leakage, spurious products, image rejection — 35 questions.
Filter Q&A BankLive→
Order selection, insertion loss, Q factor, image rejection, SAW vs BAW — 35 questions.
Antenna Q&A BankLive→
Gain, directivity, EIRP, near/far field, polarisation, FSPL and array factor — 35 questions.
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More topics coming
View all Q&A banks