Compact Bandwidth Enhanced Cavity-Backed Magneto-Electric Dipole Antenna with Outer Γ-Shaped Probe for GNSS Bands

Alexandre Causse; Kevin Rodriguez; Loïc Bernard; Ala Sharaiha; Sylvain Collardey

doi:10.3390/s21113599

Compact Bandwidth Enhanced Cavity-Backed Magneto-Electric Dipole Antenna with Outer Γ-Shaped Probe for GNSS Bands

Sensors (Basel). 2021 May 21;21(11):3599. doi: 10.3390/s21113599.

Authors

Alexandre Causse^{1

2}, Kevin Rodriguez², Loïc Bernard², Ala Sharaiha¹, Sylvain Collardey¹

Affiliations

¹ IETR, University of Rennes 1, 263 Avenue du Général Leclerc, 35700 Rennes, France.
² French-German Research Institute of Saint-Louis, 5 rue du Général Cassagnou, 68301 Saint-Louis, France.

Abstract

In this paper, a wideband small cavity-backed magneto-electric (ME) antenna is proposed. This antenna is linearly polarized and designed to cover all the Global Navigation Satellite System (GNSS) bands. It exhibits small external dimensions of 90 × 90 × 40 mm³ (0.34 × 0.34 × 0.15 λ³ at lowest frequency) and achieves a wide impedance bandwidth of 40.5% (from 1.14 to 1.72 GHz) due to the excitation of a third resonance of the ME structure. It also provides a regular broadside gain of 5.2 dBi and stable radiation pattern in both E and H planes of the antenna.

Keywords: GNSS; cavity-backed antenna; magneto-electric; miniature; wideband.