The HOMER-Series STHT 900-MHz "STOLPA" Autotuner integrates the HOMER Analyzer (automatic impedance and power measurement system) and HOMER Mototuner (a three-stub motorized tuner) in one compact unit. Based on the WR975 (R9) waveguide, the system works under the full-power operating conditions of magnetron-based microwave generators. The Analyzer part measures both the magnitude and phase of reflection coefficient as well as the incident, reflected and absorbed power, and frequency. The Mototuner consists of three stepping-motor-driven tuning stubs spaced atmutual distances of nominally one quarter of guide wavelength. The Tuner uses data measured by the Analyzer for fast automatic impedance matching of time-varying loads in all industrial applications, including plasma.The system is designed for CW, high-ripple (Rectified) and Pulsed sampling modes. Also available is matching for non-zero reflection coefficient magnitude (defined mismatch tuning). The peak working power is set at the time of manufacture as specified in the customer’s order.

STHT can be:

• Used autonomously without an external controller.
• Controlled from a personal computer or another controller via RS232, RS422, CAN, or Ethernet/IP interface.
• Integrated into a LabVIEW environment.