Fig. 1. Schematic structure of the resonant ring-based dual-port test platform

Fig. 2. Diagram of the main components of the 650 MHz resonant ring

Fig. 3. Physical diagram of the resonant ring-based dual-port test platform

Fig. 4. Test plot of the resonant ring gain

Fig. 5. Thermograms of 4 products in standing wave testing

Fig. 6. Schematic dimensions of rectangular flexible waveguide structure

Fig. 7. Simulation curves of transmission coefficients in the operating band of rectangular flexible waveguide

Fig. 8. Image of the optimized flexible waveguide

Fig. 9. Comparison of heat distribution of two flexible waveguides at 140 kW standing wave test