Compact Waveguide Power Divider Using Magic-Tee With Integrated Impedance Transformers

In this brief, we present a novel design of a Ka-band four-way power divider employing a two-part waveguide magic-T cascade structure that offers a concise form factor. The proposed power divider achieves a wide bandwidth by modifying the waveguide dimensions and using impedance matching techniques at the port. The waveguide bends act as impedance transformers to reduce the overall size of the power divider. To further optimize the design, the two parts of the power divider utilize different impedance matching schemes. The simulated and measured results show that the power divider has excellent electrical performance, with a return loss over 18 dB, isolation between different ports over 20 dB, and an insertion loss below 0.3 dB in the 34 to 39 GHz passband. The power divider has a compact, simple and efficient structure that is easy to manufacture.