Simple Patch Antenna with Filtering Function Using Two U-Slots
In this study, two U-slots of different sizes are used to combine the filtering function with a patch antenna. The U-shaped slots are etched into the patch, and currents in the opposite direction exist around these slots. Therefore, the currents cancel each other out, and a radiation null is formed....
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| Format: | Article |
| Language: | English |
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The Korean Institute of Electromagnetic Engineering and Science
2021-11-01
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| Series: | Journal of Electromagnetic Engineering and Science |
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| Online Access: | http://jees.kr/upload/pdf/jees-2021-5-r-51.pdf |
| Summary: | In this study, two U-slots of different sizes are used to combine the filtering function with a patch antenna. The U-shaped slots are etched into the patch, and currents in the opposite direction exist around these slots. Therefore, the currents cancel each other out, and a radiation null is formed. As a result, two radiation nulls are implemented on the left and right sides of the passband. To demonstrate the novelty of the proposed concept, a filtering patch antenna with a center frequency of 3.21 GHz and a 10 dB impedance bandwidth of 19.9% is designed and fabricated. High suppression levels of 25.33 and 19.32 dB in the lower and higher stopbands, respectively, are achieved. Therefore, a sharp band skirt and good selectivity are exhibited in the boresight gain response. The two radiation nulls are located at 2.4 and 3.7 GHz and can be independently adjusted. |
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| ISSN: | 2671-7255 2671-7263 |