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Wideband Filtering Slot Antenna Design with Stable Gain Using Characteristic Mode Analysis
| Content Provider | MDPI |
|---|---|
| Author | Ni, Chao Wen, Biyang Wu, Weijun Ren, Ping |
| Copyright Year | 2022 |
| Description | A filtering slot antenna with a simple structure combination using characteristic mode analysis (CMA) is proposed. To realize filtering characteristics, characteristic magnetic currents of line and ring slots are analyzed and designed. Then, the folding-line slot and double-ring slot are selected to realize radiation null separately and combined to construct the basic slot antenna. By properly exciting the selected characteristic modes, a wide filtering bandwidth and a stable gain are obtained. To validate the design process, a prototype antenna with a finite ground plane of about 1.1 λ × 1.1 λ is designed and fabricated. Simulated and measured results agree well, which both show a sharping roll rate in the lower and higher frequency and a flat gain realization in the pass band. The filtering bandwidth is 32.7%, the out-of-band suppression level at the higher frequency is over 20 dB, and the gain in the working frequency varies from 3.9 to 5.2 dB. |
| Starting Page | 2780 |
| e-ISSN | 14248220 |
| DOI | 10.3390/s22072780 |
| Journal | Sensors |
| Issue Number | 7 |
| Volume Number | 22 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-04-05 |
| Access Restriction | Open |
| Subject Keyword | Sensors Filtering Antenna Stable Gain Characteristic Mode Analysis Radiation Nulls Magnetic Current |
| Content Type | Text |
| Resource Type | Article |
