Abstract
A superdirective array of electrically small dipole
radiators can effectively be used as a compact and lightweight
first-order probe (a directive antenna radiating predominantly
spherical modes with the azimuthal index |µ| = 1) in spherical
near-field antenna measurements at low frequencies. This
contribution shows that a very narrow frequency bandwidth
peculiar to superdirective antennas can be extended to practical
values by the proper design of the array elements as well as
by relaxing the maximum directivity condition, while keeping
|µ| = 1 modes dominating in the radiation spectrum of the
antenna. The resulting probe has the relative bandwidth of 3%
and directivity above 9 dBi; its height is 0.5λ over a 1λ circular
ground plane.
Original language | English |
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Title of host publication | Proceedings of the 2015 International Symposium on Antennas and Propagation |
Publisher | Institute of Electronics, Information and Communication Engineers |
Publication date | 2015 |
Pages | 603-605 |
Publication status | Published - 2015 |
Event | International Symposium on Antennas and Propagation : Advancing Antenna and Propagation Research for a Connected World - Hobart, Australia Duration: 9 Nov 2015 → 12 Nov 2015 http://isap2015.org/ |
Conference
Conference | International Symposium on Antennas and Propagation |
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Country/Territory | Australia |
City | Hobart |
Period | 09/11/2015 → 12/11/2015 |
Internet address |