PCBs are essential in mass-produced products. They assure almost perfectly repeatable circuits. And PCBs with a good ground plane are essential for high-frequency circuits.
But rapid prototyping with PCBs has drawbacks compared with the speed and ease of building a circuit on a breadboard.
This article presents one practical alternative to PCB for high-frequency circuits.
The general approach is to start with a standard raw board with its copper layer untouched. Instead of using etched traces, you interconnect components with lead wires while leaving a large ground. You can easily check if your high-frequency circuit is working as designed.
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