Electronics > RF, Microwave, Ham Radio

Simple radio solution for ultra low power low bandwidth

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radiolistener:

--- Quote from: kuon on January 30, 2022, 06:55:20 am ---If the antenna is 50Ohm, and the chip is matched to 50Ohm (and the feed line too), why is it needed?

--- End quote ---

actual impedance depends on every nuance, include PCB material properties, copper properties and even PCB mask material properties. It's impossible to predict all these things. Even two identical PCB manufactured on the same factory at different time can have different RF properties. So if you want to get the best performance, you will need to precise tune it with a special equipment. Do not use mask at antenna and transmission line region if you want to minimize that variation.

kuon:

--- Quote from: rfclown on January 30, 2022, 07:10:13 pm ---NFC? National Football Conference?

--- End quote ---

NFC is near field communication. The only kind of antenna (loop antenna) I already successfully designed and tuned using my tinyVNA.

Thanks for all your feedback. I'll try and see where it goes.

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