A novel differential filtering SIW power divider with high selectivity |
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Authors: | Peng Li Hui Chu Rushan S Chen |
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Affiliation: | 1. Department of Communication Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu Province, People's Republic of China;2. School of Information, Nantong University, Nan Tong, Jiangsu Province, People's Republic of China |
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Abstract: | A novel differential power divider with bandpass filtering response using the substrate integrated waveguide (SIW) technology is presented. An SIW resonant cavity operated in a balanced resonant mode with odd symmetric electric field distribution is utilized to provide both balanced inputs/outputs and expected common‐mode (CM) suppression in a certain band. Meanwhile, by properly constructing the cross‐coupled topology of SIW resonant cavities, the proposed differential power divider achieves a high‐selectivity bandpass filtering response with two transmission zeros on both sides of the passband. The differential power divider is designed and prototyped on a single‐layer printed circuit board (PCB). The measured center frequency is at 10.6 GHz with 490 MHz 3‐dB bandwidth. A good CM suppression can also be achieved within the operating band. The measured in‐band differential‐mode imbalance for magnitude is ±0.3 dB, while for phase is 0°–4°. © 2015 Wiley Periodicals, Inc. Int J RF and Microwave CAE 26:182–188, 2016. |
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Keywords: | differential operation power divider substrate integrated waveguide bandpass filter |
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