Abstract
A novel reconfigurable radial composite right/left-handed transmission line (CRLH-TL) is proposed and used in a dual-band antenna with frequency agility. Varactors are used to tune the TL dispersion properties. Using the 10 dB return loss criterion, the proposed antenna has a stable relative band of 4.1% fully covering the 2.4-2.5 GHz ISM band, and a tunable operating band from 3.05 to 3.89 GHz fully covering the 3.1-3.8 GHz WiMAX band. A frequency tuning range of 24.2% is obtained in this higher band. The lower and higher resonances work at the 0 mode and 1 mode, respectively, resulting in an omni-directional pattern for both the operating bands, due to the circular symmetry. A prototype antenna is fabricated, and the simulations and experiments match well, proving the validity of the new concept.
| Original language | English |
|---|---|
| Article number | 9014511 |
| Pages (from-to) | 5664-5669 |
| Number of pages | 6 |
| Journal | IEEE Transactions on Antennas and Propagation |
| Volume | 68 |
| Issue number | 7 |
| DOIs | |
| State | Published - Jul 2020 |
Keywords
- Dual-band antenna
- Internet of Things (IoT)
- frequency reconfigurability
- radial composite right/left-handed transmission line (CRLH-TL)
- reconfigurable antenna
- reconfigurable metamaterial