RF Experiments

Effective Methods for Dielectric Constant Characterization in PCB Design

This article explores three methods to determine a PCB’s effective dielectric constant by analyzing resonance and reflection peaks, enabling accurate permittivity extraction for design and simulation.

Characterization of Crystal Resonators

Crystal resonators are essential for high-stability oscillators, offering low cost, precision, stability, and low-power consumption. This article explores the extraction of their electrical parameters to optimize performance in electronic design.

Loop Antenna Design

This study focuses on the design, construction, and evaluation of a 50 Ohm loop antenna for the 434 MHz band. Beginning with a full-wave round loop antenna, the design evolves into a 2:1 rectangular loop, with experiments conducted to assess prototype performance and the effects of material choices.

BJT PN Junction Noise Source

Reverse biased base-emitter junctions are effectively used as noise sources,

HP 1152A Mod

Active probes are a must when designing high frequency topologies.

Garage Remote Control - Range Improvement

Remote controls for garage doors are designed as low-cost devices,

DSSS BPSK Beacon

This article describes the development and working principles behind a

Parametric Frequency Divider

Parametric amplifiers and frequency dividers are a class of devices

Varactor tuned filter

Adjustable filters are desirable when the amplitude or phase of

5GHz Frequency Multiplier

Signal generators for microwave bands are expensive and difficult to