Featured · Updated October 2026
How Frequency Synthesizers Work: PLL Architectures
How an indirect PLL synthesizer works: circuit blocks, reference and feedback dividers, a worked frequency calculation, and the conditions for lock.
Evidence-led publishing
RF & Microwave Component Engineering Guides
Independent technical resources covering YIG oscillators, microwave filters, frequency synthesizers, converters and high-frequency signal-chain design.
Explore by section
Sections
12 guides
Microwave and RF Components
Component-family guides covering YIG oscillators and filters, microwave synthesizers, DROs, frequency converters, mixers and multipliers.
5 guides
YIG Technology
How yttrium iron garnet resonators, tuning coils and drivers work, and how YIG oscillators and filters compare with VCO, DRO and cavity alternatives.
6 guides
RF Engineering Guides
Reference guides to the parameters that decide a design, including phase noise, spurious content, insertion loss, VSWR, stability and settling time.
4 guides
RF Signal Chain
System-level guides to RF, IF and LO planning, up and downconversion, mixer conversion loss, image rejection and preselection.
1 guide
Microwave Applications
How component choices change across radar, electronic warfare, SATCOM, spectrum monitoring, test equipment and microwave communications.
1 guide
Component Sourcing and Quality
Practical guidance on obsolete RF parts, distributor evaluation, datasheet interpretation, traceability, incoming inspection and counterfeit avoidance.
In progress
Resources
Reference material for RF and microwave work, including a terminology glossary and an index of relevant standards and test methods.
How the parts connect
The RF signal chain
Each stage below leads to the guides covering that part of the chain.
Core technology
YIG Technology
yig technology
YIG Sphere FMR, Q Factor & Ga-YIG Specs
How single-crystal YIG sphere resonators set microwave Q factor and cutoff frequency: pure vs Ga-YIG 4πMs grades, ΔH linewidth, and BeO/sapphire rod alignment.
yig technology
How YIG Oscillators Work
How YIG-tuned oscillators work: negative-resistance devices locked to magnetically tuned resonators, coil driver circuits, and dual-coil architecture.
yig technology
What Is YIG and Why Microwave Designs Use It
Yttrium iron garnet resonates at a frequency set by an applied magnetic field, which is what makes octave-wide tunable oscillators and filters possible.
yig technology
YIG Filter vs Cavity Filter
Compare YIG-tuned and cavity filters for RF preselection. When to choose octave-wide tunability versus fixed-frequency ultra-low insertion loss.
Parameters and testing
RF Engineering Guides
engineering
RF Link Budget Calculator: FSPL, kTB+NF & X/Ku/Ka Fade Margin
Stage-by-stage RF link budget calculator and RF calculation formula reference: EIRP, FSPL, kTB+NF noise floor, G/T, Eb/N0, and ITU-R P.838 X/Ku/Ka rain fade margins.
engineering
Do Phase Noise Analyzers Need Calibration?
A practical check sheet for service calibration, internal alignment and the connected measurement chain.
engineering
Integrate Log-Spaced Phase-Noise Data Without Losing Units
Weight each log-spaced phase-noise row by its real hertz width, and keep the carrier, the limits, and the units with the sum.
engineering
Missing RF-to-IF Isolation: What to Ask and How to Measure
Record stimulus, LO state, terminations, reference plane, and analyzer frequency before comparing an RF-to-IF isolation number a mixer datasheet left blank.
Where it is used
Microwave Applications
applications
Radar RF Component Selection
Map radar waveform timing, frequency coverage and noise offsets to LO, filter and converter checks, with explicit source-and-filter readiness conditions.
Buying and verifying
Component Sourcing and Quality
sourcing quality
Sourcing Obsolete RF & Microwave Components
Check obsolete RF sourcing routes, custody records, inspection and RF testing, with contract-specific notification and suspect-counterfeit disposition boundaries.
Recently published
Latest guides
components
RF Synthesizer Architecture: Integer-N vs Fractional-N PLLs
Compare Integer-N, Fractional-N Sigma-Delta, and Hybrid PLL+YIG RF frequency synthesizers across 20·log10(N) phase noise, PFD frequency, IBS spurs, and lock time.
components
RF Transceiver Module: TDD vs. FDD Front-End Isolation
RF transceiver module front-end isolation guide: TDD circulator, PIN switch, and limiter recovery time vs. FDD cavity duplexer TX-to-RX noise and carrier budgets.
components
RF Module Transmitter and Receiver: Cascade NF, IIP3 & SFDR
RF module transmitter and receiver architecture guide: superheterodyne vs. Zero-IF signal chains, Friis cascaded noise figure, IIP3 linearity, and SFDR budgets.
signal chain
Mixer Conversion-Loss Ripple: Check the IF Termination
An A/B fixture checklist and comparison matrix for a resistive pad, terminated diplexer, and absorptive filter when an IF filter adds mixer conversion-loss ripple.
signal chain
Mixer Port Swaps: Specs to Recheck
Decide which mixer port swap a topology allows, then recheck passband, DC path, LO drive, isolation, conversion loss, and spurs on the datasheet.
engineering
HMC832 Lock Detect: What Frequency Tolerance Does It Prove?
What an asserted HMC832 lock detect confirms after a hop, which Register 0x07 fields change it, and how to record a separate RF frequency acceptance check.
Editorial disclosure
How this publication works
MicroSource Insights publishes engineering reference guides to RF, microwave, and YIG signal-chain components.