Omnidirectional Loop Antenna With Left-Handed Loading

AL Borja, Peter Hall, Q Liu, H Iizuka

Research output: Contribution to journalArticle

54 Citations (Scopus)


This letter presents an omnidirectional horizontally polarized planar printed loop-antenna using left-handed CL loading with 5042 input impedance. The antenna has a one wavelength circumference and gives an onmidirectional pattern in the plane of the loop, whilst working in an n = 0 mode. In contrast, a conventional right-handed loop, with the same dimensions, has a figure of eight pattern in the plane of the loop. The antenna is compared with other right-handed periodically loading loop antennas and shown to have the best efficiency and is much easier to match. Design details and simulated results are presented. The concept significantly extends the design degrees of freedom for loop antennas.
Original languageEnglish
Pages (from-to)495-498
Number of pages4
JournalIEEE Antennas and Wireless Propagation Letters
Publication statusPublished - 1 Jan 2007


  • loop antennas
  • loaded antennas
  • left-handed materials
  • periodic structures


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