Optimal antenna currents for Q, superdirectivity, and radiation patterns using convex optimization

Summary, in English

The high Q-factor (low bandwidth) and low efficiency make the design of small antennas challenging. Here, convex optimization is used to determine current distributions that provide upper bounds on the antenna performance. Optimization formulations for maximal gain Q-factor quotient, minimal Q-factor for superdirectivity, and minimum Q for given far-fields are presented. The effects of antennas embedded in structures are also discussed. The results are illustrated for planar geometries.

• Författare: Mats Gustafsson; Sven Nordebo
• Avdelning/ar: Institutionen för elektro- och informationsteknik
• Publiceringsår: 2013
• Språk: Engelska
• Sidor: 1109-1118
• Publikation/Tidskrift/Serie: IEEE Transactions on Antennas and Propagation
• Volym: 61
• Issue: 3
• Länkar: http://dx.doi.org/10.1109/TAP.2012.2227656
• Dokumenttyp: Artikel i tidskrift
• Förlag: IEEE - Institute of Electrical and Electronics Engineers Inc.
• Ämne: Electrical Engineering, Electronic Engineering, Information Engineering
• Nyckelord: small antennas; convex optimization; Q-factor
• Status: Published
• Forskningsgrupp: Electromagnetic theory
• ISBN/ISSN/Övrigt: ISSN: 0018-926X