Single and multi-probe slide screw impedance tuners incorporate DC bias networks. The bias networks can be inserted at the test port, between DUT and first tuner probe/slug, or at the idle port, between tuner probe/slug and load or source. The bias networks are designed and optimized for different frequency and DC power (current, voltage) ranges and are insertable and exchangeable, depending on the application. The effects are short-circuit protection, higher compactness and shorter supply lines leading to: a) better control of spurious oscillations and IF impedance and b) improved sideband up-mixing behavior of the DUT in modulated-signal nonlinear applications.
Impedance Tuner with Integrated Bias Network / 8,466,758
Tuesday, June 18, 2013