Enhanced antenna performances using planar circularly symmetric EBG's

N. Llombart, A. Neto, G. Gerini, P.J.I. de Maagt

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

3 Citations (Scopus)
176 Downloads (Pure)


Planar circularly symmetric (PCS) electromagnetic band-gap (EBG) substrates have recently been proposed to suppress surface waves (Llombart, N. et al., 2004). The application of PCS-EBG to reduce the surface waves excited by an antenna printed on a dielectric slab is discussed. The study starts from a reference microstrip-excited, slot-coupled dipole that presents a relatively large bandwidth (about 12%) and relatively low efficiency (about 40%-60%) due to surface wave losses. Some design considerations on how to enhance the performance of this antenna by surrounding it with a PCS-EBG are then presented. Finally the measured results are presented. These explicitly show the advantages of the proposed EBG substrate in terms of bandwidth and radiation pattern. A bandwidth of 20% is achieved without significant surface wave losses. The results also show radical improvements in the isolation between antennas printed on the same substrate.
Original languageEnglish
Title of host publicationProceedings of the 2005 IEEE Antennas and Propagation Society International Symposium, 3-8 July 2005, Washington, DC
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
ISBN (Print)0-7803-8883-6
Publication statusPublished - 2005


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