Numerical study and experimental validation of a four-way feeding network with 45 deg broadband phase shifts for antenna array applications
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Nov 26, 2019
About this article
Published Online: Nov 26, 2019
Page range: 400 - 405
Received: Sep 06, 2019
DOI: https://doi.org/10.2478/jee-2019-0072
Keywords
© 2019 Jia-Lin Li et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
A four-way network with 45 deg output phase shifts for feeding antenna array is studied in this work. To widen the phase imbalance, quarter wavelength short stubs with suitable characteristic impedances are introduced and numerically analyzed. Meanwhile, the wideband magnitude imbalance is also discussed by extending the inter-stage transmission line with proper electric length. The study is further confirmed by developing a prototype feeding network centered at 3 GHz. Results from the fabricated prototype network exhibit wideband good performance, both from numerical evaluations and experimental demonstrations.