2 research outputs found
Electromagnetic bandgap antennas and components for microwave and (Sub)millimeter wave applications
This paper reviews the primary application areas of electromagnetic bandgap (EBG) technology at microwave and (sub)millimeter wave frequencies. Examples of EBG configurations in the microwave region include array antennas, high precision GPS, mobile telephony, wearable antennas and diplexing antennas. In the submillimeter wave region a 500 GHz dipole configuration and a novel heterodyne mixer is shown for the first time. Some emphasis is also placed on EBG waveguides and filters. As most fundamental components will be available in EBG technology, a fully integrated receiver could be developed in order to take full advantage of this technology. True integration of passive and active components can now begin to materialise using EBG technology
Resonant meta-surface superstrate for single and multifrequency dipole antenna arrays
The design of a multifrequency dipole antenna array
based on a resonant meta-surface superstrate is proposed. The behavior
of a single element that is closely placed to a meta-surface is
experimentally investigated. The proposed meta-surface is based
on resonating unit cells formed by capacitively loaded strips and
split ring resonators. By tuning a dipole antenna to the pass band
of the meta-surface, the physical area is effectively illuminated enhancing
the radiation performance. The gain, radiation efficiency
and effective area values of the whole configuration are compared
to the ones obtained with a single dipole without superstrate. Radiation
efficiency values for the proposed configuration of more
than 80% and gain values of more than 4.5 1 dB are obtained.
Based on this configuration, simulated results of a multifrequency
antenna array are presented. Distinctive features of this configuration
are high isolation between elements (20 dB for a distance of lambda0/4), and low back radiation