Design and 3D Modeling of RF/Microwave Radial Power Divider/Combiner part 3: Cylindrical Based

Introduction to Radial Combiners00:00:03

Dr. Mohammed Nizami introduces the third part of his series on radial power combiners and splitters, shifting focus to designs based on cylindrical cavities with suspended line probes.

Cylindrical Cavity Design Overview00:12:46

Explanation of the cylindrical cavity architecture, which utilizes an N-type connector, an air-filled cavity for minimal loss, and symmetrically placed suspended line probes for spatial signal combining.

HFSS Simulation and Modeling00:15:55

A walkthrough in HFSS demonstrating how to model the cylindrical cavity, including the integration of the board, slots for suspended lines, and the coaxial feeding mechanism.

Mathematical Foundations and Modes00:28:47

Discussion of the Bessel function equations used to calculate cavity resonance frequencies and the importance of selecting dimensions to excite only the dominant TM01 mode while suppressing higher-order modes.

Performance Analysis and Optimization00:41:09

Demonstration of the signal propagation within the cavity as both a splitter and a combiner, alongside advice on optimizing return loss by tuning probe lengths and feed transitions.

Practical Application and Conclusion00:46:07

Review of the practical applications of this design in Ku-band satcom systems and power amplifiers, followed by an announcement regarding upcoming hands-on training sessions.