Insertion loss

Okay kiddo, so insertion loss is a way to measure how much a device, like a cable or a filter, makes signals weaker. Think of it like this - when you whisper a secret to your friend, if someone is standing too far away or there's too much noise, they might not be able to hear you properly. That's like insertion loss - it's when the signal gets weaker as it goes through the device.

It's important to know how much insertion loss there is because it can affect how well your technology works. If a cable or filter reduces the signal too much, then the device won't work properly or maybe not even work at all.

Insertion loss is usually measured in decibels (dB) - a way to show how much the signal is reduced. For example, if the signal is reduced by 3 dB, that means it's half as strong as it was before.

So that's what insertion loss is - it's how much a device makes signals weaker, and we measure it in decibels.