Frequency and Time Domain Analysis of DifferentApproaches to the Backing of an Uwb Slot Antenna

G. Clementi (1) , Nicolas Fortino (1) , Jean-Yves Dauvignac (1) , Georges Kossiavas (1)

1 LEAT - Laboratoire d'Electronique, Antennes et Télécommunications

The presence nearby of a parallel metallic plane usually impairs the radio-electric performance of planar ultrawideband (UWB) elements such as monopole and slot antennas. Two comparative approaches to this problem are studied, in the frequency and time domains. Conservation of the UWB performance of a slot antenna is investigated in order to obtain a mono-directional quasi-planar element suitable for an UWB array. First, the addition of a planar reflector is studied: up to a certain distance, wide impedance bandwidth is maintained, but the antenna offers a non-uniform gain. Secondly, the addition of a cavity overcomes this disadvantage and makes the cavity-backed slot antenna one of the best candidates for an UWB quasi-planar array.

Mots clés: planar ultrawideband elements; monopole antenna; UWB performance; mono-directional quasiplanar element suitable; planar reflector; wide impedance bandwidth; cavity-backed slot antenna; UWB quasiplanar array; Gain; Antenna measurements; Directive antennas; Directive radiation pattern; frequency domain; time domain; ultrawideband (UWB); UWB slot antenna; time domain analysis; frequency-domain analysis; slot antennas; antenna radiation patterns; time-domain analysis; frequency domain analysis; ultra wideband antennas; parallel metallic plane; radio-electric performance

Domaines: Electromagnétisme

G. Clementi, Nicolas Fortino, Jean-Yves Dauvignac, Georges Kossiavas. Frequency and Time Domain Analysis of DifferentApproaches to the Backing of an Uwb Slot Antenna. IEEE Transactions on Antennas and Propagation, 2012, 60 (7), pp.3495-3498. ⟨10.1109/TAP.2012.2196910⟩. ⟨hal-00933079⟩