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Ultra-wideband balun and power divider using coplanar waveguide to microstrip transitions |
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| Affiliation: | 1. Aerospace Research Institute, Ministry of Science, Research and Technology, Tehran 1465774111, Iran;2. School of Electrical and Computer Engineering, College of Engineering, University of Tehran, Tehran 143995713, Iran;1. Department of Electrical Engineering, Shiraz University of Technology, Shiraz, Iran;2. Mechanic Institute, Iranian Space Research Centre, Shiraz, Iran;1. School of Communication and Information Engineering, Shanghai University, Shanghai, China;2. Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai, China;3. Department of Electronic Engineering, Chinese University of Hong Kong, Hong Kong, China |
| Abstract: | An ultra-wideband transition from coplanar waveguide (CPW) to a pair of microstrip lines is presented in this letter. It is shown that the proposed transition can be used to devise an ultra-wideband T-junction power divider with equally split in-phase output signals. More importantly, it is demonstrated that the out-of-phase magnetic currents in the slots of the CPW can be utilized to achieve an out-of-phase power divider or a balun. Both the T-junction power divider and the balun benefit from compact size and good performance over an ultra wide frequency band from 3 to 16 GHz. Prototypes of both proposed devices are fabricated and measured to provide an experimental verification on the concept and numerically predicted features. |
| Keywords: | Power divider Balun Transition Planar structures Ultra-wideband |
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