Improvement of Gain and Elevation Tilt Angle Using Metamaterial Loading for Millimeter-Wave Applications
- Resource Type
- Periodical
- Authors
- Dadgarpour, A.; Zarghooni, B.; Virdee, B. S.; Denidni, T. A.
- Source
- IEEE Antennas and Wireless Propagation Letters Antennas Wirel. Propag. Lett. Antennas and Wireless Propagation Letters, IEEE. 15:418-420 2016
- Subject
- Fields, Waves and Electromagnetics
Dipole antennas
Arrays
Antenna measurements
Loaded antennas
Antenna arrays
Metamaterials
Beam switching
beam tilting
beamforming network
dipole antennas
metamaterials
millimeter waves
- Language
- ISSN
- 1536-1225
1548-5757
Elevation-plane beam tilting is demonstrated for a printed dipole antenna operating over 57–64 GHz. This is achieved using a $3 \times 4$ array of high refractive-index metamaterial (HRIM) unit cells. The unit cell comprises a modified H-shaped structure with stub loading to control the refractive index of the unit cell over a finite frequency range. Integration of the $3 \times 4$ array in the H-plane of a dipole antenna is shown to deflect the main beam by $ + 30^{\circ}$ with respect to the endfire direction over 57–64 GHz. In addition, the proposed technique provides 5 dB gain enhancement.