Abstract
A novel compact dual-band circular/linear polarization (CP/LP) switchable slot annular antenna with integrated filtering network is proposed in this paper. The feed network is composed of a couple of stepped impedance resonators (SIR) with favorable dual-band filtering characteristic. The SIR structure loaded with T-shape branches can adjust the center frequency more flexibly especially for dual band operating. A PIN diode is welded on the slot antenna to achieve the transform between the linear polarization and the circular polarization of the filtering antenna. The proposed dual-band CP antenna easily achieves 10 dB impedance bandwidth of 140/180 MHz and 3-dB axial-ratio bandwidth approximating 230/210 MHz at 2.6/4.8 GHz.
| Original language | English |
|---|---|
| Article number | e22767 |
| Journal | International Journal of RF and Microwave Computer-Aided Engineering |
| Volume | 31 |
| Issue number | 9 |
| DOIs | |
| State | Published - Sep 2021 |
Keywords
- dual-band antenna
- filtering antenna
- polarization-reconfigurable antenna
- stepped impedance resonator