Design and 3D Modeling of RF/Microwave Radial Power Divider/Combiner part 5: Coaxial Cone disk cavity

Introduction and Consulting Services00:00:02

Dr. Muhammad Nizami introduces the fifth session of his RF and microwave device design series and discusses his remote consulting services for high-frequency circuit design.

Training Announcement00:03:19

Details regarding a hands-on three-day training session in Jordan focused on 3D HFSS modeling for microwave devices used in radar, satellite communication, and 5G.

Limitations of Corporate Structures00:04:08

Explanation of why traditional corporate (Wilkinson) dividers become difficult to scale beyond four or eight ways due to accumulated losses, symmetry issues, and narrow bandwidths caused by quarter-wave transformers.

Coaxial Ring Cavity Design00:10:54

Technical overview of the 16-way coaxial ring cavity combiner, featuring a tapered inner conductor cone and capacitive disk-loaded probes, which allow for better scalability and higher order mode suppression.

Simulation and Field Visualization00:20:03

A walkthrough of the electromagnetic field behavior within the cavity, showing how the signal symmetrically distributes to peripheral ports and how the geometry ensures uniform phase and amplitude.

Design Optimization and Modeling00:28:02

Detailed discussion on the design parameters, including the tapering of the coaxial line, the role of capacitive loading to reduce probe length, and strategies for maintaining impedance matching.

Applications and Conclusion00:39:35

Discussion on real-world applications of radial combiners in high-power amplifiers and antenna feeding, concluding with an invitation to the upcoming training course and a preview of the next session regarding microstrip probes.