RF & Wireless — question 10 of 10
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A realistic bench task after a VNA sweep reveals a poorly matched antenna port.
You've measured your antenna's input impedance on a VNA at 2.4GHz as 15 - j40 ohms -- noticeably mismatched and reactive relative to the 50-ohm system. You need to design a matching network to bring VSWR close to 1:1 at that frequency. Walk through how you'd choose and design an L-network for this, then discuss the tradeoff between matching bandwidth and network Q as you tighten the match -- why can't you get both a perfect match and wide bandwidth at the same time?