RF Fundamentals Course

Lesson 1 • RF Units and Logarithmic Math

Introduces decibels, dBm, and dBW for expressing power and gain. Proficiency here is required for link budget and system analysis work.

Lesson 2 • Signal Propagation Fundamentals

Explains free-space path loss, reflection, diffraction, and scattering. Connects propagation physics to real-world link performance.

Lesson 3 • Electromagnetic Spectrum Overview

Maps the full EM spectrum and positions RF within it. Establishes frequency band definitions used throughout the course.

Lesson 4 • Introduction to RF System Blocks

Surveys transmitters, receivers, antennas, and transmission lines as a system. Provides context for the detailed component study in subsequent chapters.

Lesson 1 • Rectangular and Circular Waveguides

Covers TE and TM mode propagation in metallic waveguides. Explains cutoff frequency and mode selection for high-power and low-loss applications.

Lesson 2 • Coaxial and Planar Line Types

Compares coaxial, microstrip, stripline, and coplanar waveguide structures. Guides selection based on frequency, loss, and fabrication constraints.

Lesson 3 • The Smith Chart

Teaches graphical impedance navigation using the Smith chart. Enables rapid impedance transformation and matching network design.

Lesson 4 • Reflections and Standing Waves

Analyzes what happens when a line is mismatched at its load. Introduces reflection coefficient and VSWR as practical quality metrics.

Lesson 1 • Attenuators and Terminations

Covers fixed and variable attenuators, pads, and matched loads. Explains their role in impedance matching and dynamic range management.

Lesson 2 • Power Dividers and Combiners

Analyzes Wilkinson and resistive dividers for splitting and combining RF signals. Addresses isolation, amplitude balance, and phase balance requirements.

Lesson 3 • RF Filters: Types and Topologies

Covers low-pass, high-pass, bandpass, and band-stop filter responses and realizations. Connects filter order and topology to insertion loss and selectivity.

Lesson 4 • Directional Couplers

Explains coupling factor, directivity, and isolation in four-port coupler networks. Demonstrates use in power monitoring and signal sampling.

Lesson 1 • Noise Figure and Low-Noise Design

Quantifies thermal noise, noise figure, and noise temperature in receiver chains. Applies Friis formula to minimize system noise figure.

Lesson 2 • RF Transistor Technologies

Compares BJT, MOSFET, GaAs MESFET, GaN HEMT, and SiGe HBT for RF use. Guides technology selection based on frequency, power, and noise requirements.

Lesson 3 • Impedance Matching for Amplifiers

Applies Smith chart and matching network techniques to amplifier input and output ports. Balances gain, noise, and stability simultaneously.

Lesson 4 • Linearity and Power Amplifier Classes

Covers IP3, P1dB, and harmonic distortion as linearity metrics. Explains Class A through Class F amplifier efficiency and linearity trade-offs.

Lesson 1 • Fractional-N and Direct Digital Synthesis

Extends PLL concepts to fractional-N and DDS architectures for fine frequency resolution. Addresses spurious outputs and sigma-delta modulation.

Lesson 2 • Voltage-Controlled Oscillators

Covers varactor tuning, tuning sensitivity (Kv), and pushing/pulling effects in VCOs. Prepares students for VCO integration into PLL synthesizers.

Lesson 3 • Phase Noise and Spectral Purity

Defines phase noise, its measurement in dBc/Hz, and its impact on system performance. Links resonator Q and flicker noise to phase noise floor.

Lesson 4 • Phase-Locked Loop Architecture

Explains PLL building blocks: phase detector, loop filter, VCO, and divider. Analyzes loop bandwidth, lock time, and reference spurs.

Lesson 1 • Demodulation and Receiver Detection

Covers coherent and non-coherent detection methods and their sensitivity trade-offs. Connects demodulator design to overall receiver architecture.

Lesson 2 • Mixer Theory and Frequency Conversion

Explains the nonlinear multiplication process that produces sum and difference frequencies. Defines conversion gain, isolation, and image frequency.

Lesson 3 • Digital Modulation Schemes

Analyzes BPSK, QPSK, QAM, and OFDM in terms of spectral efficiency and BER. Connects modulation order to SNR requirements and link budget.

Lesson 4 • Analog Modulation Techniques

Covers AM, FM, and PM modulation principles and their spectral characteristics. Establishes baseline for comparing analog and digital modulation efficiency.

Lesson 1 • Antenna Impedance Matching and Measurement

Covers baluns, matching networks, and antenna range measurement techniques. Ensures students can verify antenna performance against specifications.

Lesson 2 • Wire Antennas: Dipoles and Monopoles

Analyzes half-wave dipole and quarter-wave monopole radiation and impedance. Provides the reference antenna for comparing all other types.

Lesson 3 • Antenna Arrays and Beamforming

Explains array factor, element spacing, and phased array beam steering. Connects array theory to modern MIMO and beamforming systems.

Lesson 4 • Aperture and Microstrip Antennas

Covers horn, parabolic reflector, and patch antenna operation and design trade-offs. Addresses gain, bandwidth, and fabrication for each type.

Lesson 1 • Transceiver Architecture Trade-offs

Compares superheterodyne, direct-conversion, and direct-sampling receiver architectures. Evaluates each for image rejection, DC offset, and integration level.

Lesson 2 • Link Budget Construction

Builds a complete link budget from transmit power through path loss to received SNR. Identifies margin, fade margin, and link closure conditions.

Lesson 3 • Dynamic Range and Spurious Analysis

Defines spurious-free dynamic range and identifies dominant spur sources in a receiver. Guides filtering and shielding decisions to meet spectral mask requirements.

Lesson 4 • Receiver Sensitivity and Noise Floor

Calculates minimum detectable signal from bandwidth, noise figure, and required SNR. Anchors the link budget receive-side analysis.