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Wideband Low-Profile Endfire Antenna With Polarization Reconfigurability
- Source :
- Circuits and Systems II: Express Briefs, IEEE Transactions on; 2024, Vol. 71 Issue: 4 p1984-1988, 5p
- Publication Year :
- 2024
-
Abstract
- A wideband, low-profile endfire antenna with polarization reconfiguration is proposed. The endfire antenna can be electronically switched among the left-hand circular polarization (LHCP), right-hand circular polarization (RHCP), and linear polarization (LP) using six PIN diodes in conjunction with biasing lines. The proposed antenna consists of a wideband half-mode substrate integrated waveguide (HMSIW) cavity (vertically polarized magnetic dipole) and tapered switchable electric dipole (horizontally polarized) with a feed line. The impedance bandwidth of the HMSIW cavity is increased by combining the resonance frequencies of quasi-TE1,0.5,0 mode with quasi-TE3,0.5,0 mode by placing the two slotted pairs at the null of quasi-TE3,0.5,0 mode. At LHCP/RHCP states, the proposed endfire antenna exhibited a stacked 10-dB impedance bandwidth (IBW) of 11.66% (6.54-7.35 GHz) and a 3-dB axial ratio bandwidth (ARBW) of 11.23% (6.515-7.29 GHz) with a peak gain of approximately 4.20 dBic. When switched to the LP state, it shows a 10-dB impedance bandwidth of 11.58% (6.87-7.715 GHz) with a peak gain of 5.35 dBi. Therefore, it can exhibit good effective bandwidths (stacked 10-dB IBW and 3-dB ARBW) of 5.93% (6.87-7.29 GHz) and 10.84% (6.54-7.29 GHz) across the three polarization states (LP/RHCP/LHCP) and two CP states (RHCP/LHCP), respectively.
Details
- Language :
- English
- ISSN :
- 15497747 and 15583791
- Volume :
- 71
- Issue :
- 4
- Database :
- Supplemental Index
- Journal :
- Circuits and Systems II: Express Briefs, IEEE Transactions on
- Publication Type :
- Periodical
- Accession number :
- ejs65971137
- Full Text :
- https://doi.org/10.1109/TCSII.2023.3334793