ALLPCB
Why Modulate Signals? Common Linear Modulation Types
Learn why modulation adapts baseband signals to bandpass channels, definitions, AM/FM/PSK/QAM, linear vs nonlinear methods and purposes.
Designing RF Circuits for Doherty Amplifiers
Learn Doherty amplifier RF circuit design: carrier and peaking amplifier theory, splitting, matching, combining, phase and efficiency challenges.
Wireless Microphone System: Components & Operation
Learn wireless microphone systems: components, how transmitters and receivers work, and key tech: automatic frequency switching, noise suppression.
Evolution of Antenna Theory to Modern Applications
Survey of antenna theory: circuit and modal developments, key historical results, scholars, and modern micro-convex antenna advances.
Why S-Parameters Dominate RF Engineering
Discover why S-parameters are the RF standard: wave-based definitions, matched-load practicality, and VNA/directional coupler measurements.
Definition and Characteristics of Flexible Wearable Antennas
Explore the definition, types, and applications of flexible wearable antennas for smart devices and biomedical monitoring.
Selection of Probe Antennas for Near-Field Antenna Measurements
Explore probe antenna selection for near-field measurements, focusing on millimeter-wave and sub-terahertz antenna testing systems.
Practical Guide to RFIC Design and Testing
RFIC design & testing guide: design tradeoffs, validation methods, and production tips to optimize wireless communication performance.
EVM Metric for Wireless Transceivers
Understand Error Vector Magnitude (EVM), a key signal quality metric, how to calculate it, and factors that impact wireless system performance.
Radar Antennas: Understanding Received Echo Power
Understand radar basics: radiated power, antenna gain, radar cross section, effective aperture and why received power drops as 1/R^4.
NB-IoT Antenna ESD and Surge Protection
NB-IoT antenna ESD and surge protection guide: low-capacitance diodes (ULC3311CDN, ULC0511CDN30) and GDTs for IEC 61000-4-5.
What Causes Passive Intermodulation and How to Solve It
Explore passive intermodulation (PIM) in RF systems: causes, material/contact nonlinearity, real satellite cases, and mitigation tips for engineers.
Adaptive Radar Beam Scheduling Strategies and Criteria
Explore adaptive radar beam scheduling strategies and criteria for optimizing phased array radar systems and resource allocation.
RF Learning: Common Questions and Answers
Practical RF design Q&A: PA saturation, GaN/ADS convergence, Doherty, LNA matching, load-pull, MMIC layout and simulation tips.
Estimating Device Power from Signal Switching
Estimate switching power in VLSI using activity and Monte Carlo simulation to predict dynamic power and run package-level thermal simulation for reliability.
Antenna Design Guide for Efficient Wireless
EDA-driven guide: shrink a Bluetooth IoT antenna to 53% and gain ~6 dB by optimizing rigid-flex, matching network, grounding, and mounting.
IQ Mismatch Causing Image Interference in Zero-IF Receivers
Learn how IQ gain and phase mismatches in zero-IF receivers create image interference and how image rejection relates to gain/phase errors.
Integrated Sensing-Communication-Computing Use Cases
Integrated sensing-communication-computing with 5G/Wi-Fi and AI for smart homes, transport, cities, healthcare, and drone monitoring.
NR Frame Structure and Flexible Subframe Design
Huawei NR frame structure design: flexible numerologies, coexistence, subframe scaling, TDD/configurable HARQ, unlicensed and MIMO considerations.
How to Conceal an HF GP Vertical Antenna
Learn how to hide an HF ground-plane vertical inside a foam and fiberglass mast or flagpole, with design tips, materials, and RF tuning advice.