impedance-matching

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  1. A

    TDR Pulse Generator with Single GaN FET (High-Side Switch) — Low Reflection Issue

    I'm building a TDR pulse generator using a single GaN FET (TP65H300G4LSGB) in high-side configuration, driven by NCP51820. The drain is at 40 V, and the source goes through a 50 Ω resistor to GND. Output is taken from the FET source. My Final target is upto 200v. Pulse specs: ~40 V amplitude...
  2. Kafei42

    Measuring the Loaded Q of My 433 MHz Matching Network with Only a 50 Ω VNA

    Hi everyone, The transmitter output path is RFpin → Choke → DC-Block → Matching Network (PI/T) → 50 Ω antenna. Because the datasheet doesn’t pin down the pin impedance, I probed it directly: Zin (RFpin) ≈ 6.6 – j108.5 Ω (|X|/R ≈ 16.4). I now want to confirm the loaded Q / -3 dB bandwidth of the...
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