The Great Search – 4.7 µH RF Inductor Q greater than 20 at 25 MHz
For our SI4732 radio breakout, we're following the application note (https://www.skyworksinc.com/-/media/Skyworks/SL/documents/public/application-notes/AN383.pdf) for antenna setup. It specifies a low-pass filter inductor of 4.7 µH with a Q factor greater than 20 at 25 MHz and minimal DC resistance. The recommended part, COILCRAFT 1008CS-472GLB (https://www.digikey.com/en/products/detail/coilcraft/1008CS-472XGRC/15794541), is somewhat pricey. Let's explore some alternatives! Recommended Alternatives: Murata LQW2UAS4R7J00L: 4.7 µH, Q=20 @25 MHz, 260 mA, 4 Ω DCR, 1008 package. Abracon…
The skinny
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