Superdirective Magnetic Dipole Array as a First-Order Probe for Spherical Near-Field Antenna Measurements

Oleksiy S. Kim, Sergey Pivnenko, Olav Breinbjerg

Research output: Contribution to journalJournal articleResearchpeer-review

521 Downloads (Pure)

Abstract

The theory as well as numerical and experimental results are presented for a superdirective array composed of closely spaced electrically small resonant magnetic dipole elements. The array operates on a metal ground plane and can exhibit a maximum directivity of 11.5 dBi, 15.2 dBi, and 17.8 dBi (including 3 dB due to the ground plane), for 2, 3, and 4 magnetic dipoles, respectively. The array is self-resonant and is directly excited by a 50-ohm coaxial cable through the ground plane. The array radiates essentially the $\vert\mu\vert=1$ spherical modes, which, despite a narrow bandwidth, makes it an excellent first-order probe for spherical near-field antenna measurements at low frequencies.
Original languageEnglish
JournalI E E E Transactions on Antennas and Propagation
Volume60
Issue number10
ISSN0018-926X
DOIs
Publication statusPublished - 2012

Keywords

  • Electrically small antennas,
  • First-order probe
  • Magnetic dipole
  • Spherical near-field antenna measurements
  • Superdirectivity
  • Supergain array

Fingerprint Dive into the research topics of 'Superdirective Magnetic Dipole Array as a First-Order Probe for Spherical Near-Field Antenna Measurements'. Together they form a unique fingerprint.

Cite this