Wideband n-Way Power Dividers Using Transformers for HF/VHF Applications

Abstract

In this letter, an n-way power divider based on ferrite transformers is presented for high-frequency (HF) and very-high-frequency (VHF) applications, where a novel circuit topology is proposed to realize wideband impedance matching. And a radial isolation network constructed by n resistors is introduced to improve the isolation, thereby avoid jumper resistors between output ports. The even-odd-mode analysis method is adopted to explore the mechanism of the proposed topology. Then, a wideband five-way power divider is designed to verify the validity of the proposed method and topology. The measured results demonstrate that this design exhibits excellent performance in the frequency band of 0.01-450 MHz. The return loss of the input port is better than 20 dB, the isolation between output ports is more than 23 dB, and the amplitude and phase imbalances are less than 0.2 dB and 1.7°, respectively.