Figure - available from: International Journal of RF and Microwave Computer-Aided Engineering
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The theoretical model of the magnetic coupling semicircular ring. A, The sectional views of the transition (dotted lines are magnetic field lines). B, The surface current of waveguide
Source publication
A Ka‐band power divider/combiner with dual magnetic coupling semicircular ring probes is proposed in this paper. Firstly, a broadband microstrip‐to‐waveguide transition with semicircular ring probe is designed based on the side‐inserted structure of magnetic field excitation in a rectangular waveguide. The insertion loss of the proposed transition...
Citations
This research presents a Ka-band isolated three-way power combiner using a six-port
$E$
-plane waveguide coupler (SEWC) and a magnetically coupled transition from the waveguide to the microstrip line. To achieve phase coherency, magnetic ring probes with different rotation directions are designed. The experimental results indicate an amplitude imbalance within the range of
$\pm$
0.8 dB at frequencies between 30 and 40 GHz. The isolation exceeds 22 dB, and all return losses are better than 16.2 dB. When three GaN power amplifiers with output power ranging from 8 to 10 W are integrated, the active combiner generates radio frequency (RF) power up to 25.8 W within the 30 to 40 GHz band. This translates to an average combining efficiency of 88.6% and a power-added efficiency exceeding 14.7%.
