Optimum design of a wideband planar N-way fork power divider with arbitrary power division and input-to-output impedance matching |
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| Affiliation: | 1. University of Novi Sad, Faculty of Technical Sciences, Trg Dositeja Obradovica 6, Novi Sad, Serbia;2. University of Belgrade, Faculty of Electrical Engineering, Belgrade, Serbia;1. Information Security Center, State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China;2. School of Mathematics and Computer Science, Anhui Normal University, Wuhu 241000, China;3. National Engineering Laboratory for Disaster Backup and Recovery, Beijing University of Posts and Telecommunications, Beijing 100876, China;4. State Key Laboratory of Public Big Data, Guizhou 550025, China;1. Dept. of Electronic Engineering, Ming Chi University of Technology, Taiwan, ROC;2. Dept. of Electronic Engineering, National Taipei University of Technology, Taiwan, ROC;1. Department of Telecommunication Engineering, Federal University of Technology, Minna, Niger State, Nigeria;2. Department of Mechatronics Engineering, Federal University of Technology, Minna, Niger State, Nigeria;3. Department of Electrical Electronics Engineering Nigerian Turkish Nile University, Abuja, Nigeria;4. Department of Mechatronics Engineering, Kulliyah of Engineering, International Islamic University Malaysia, Kuala Lumpur, Malaysia |
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| Abstract: | An effective design procedure based on method of least squares is proposed for multi-section and multi-output fork power divider/combiner with arbitrary power division ratios among its outputs in a specified frequency bandwidth together with impedance matching among its arbitrary source/load impedances. Transmission and scattering matrices are obtained for its equivalent circuit. An error function is constructed based on design specifications on its output power division ratios, isolations among output ports, return losses at its input and output ports and source/load impedances in a desired frequency bandwidth. The design procedure is fully developed, which determines the widths and lengths of microstrip line sections and resistor values. A design example is described for unequal power division ratio and unequal input/output impedances. A 3-section and 3-output fork power divider is designed for equal power division and load/source impedances for 2–12 GHz band. It is fabricated and measured. Variations of its transmission coefficients are less than 0.5 dB, isolations at its outputs are better than −15 dB and reflection coefficients at its ports are better than −10 dB. Excellent agreement is observed among the results of the proposed design procedure, full wave computer software and measurement data. |
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| Keywords: | Least squares method Microwave components Optimization Power divider Fork power divider |
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