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Mike Underhill's talk to the Adelaide Amateur Radio fraternity in February 2008 stirred up a lot of interest in small  antennas.
The papers and discussions make interesting and educational reading. See also the 2010 presentation.

Tuneable Coupled (Multi-) Mode Small Antennas by Prof Mike Underhill G3LHZ (presented at the RSGB Convention October 2010)   VK4AMZ Mike Zingelmann's website showcases an exemplary STL (small transmitting loop) homebrew antenna inlcuding design and construction 2008 presentation by Professor Mike Underhill, G3LHZ. February 2008 and more Lecture and papers   Paper by Leigh Turner VK5KLT The Underestimated Magnetic Loop HF Antenna (pdf) Updated 27/11/2010       Discussions/forum: Leigh (VK5KLT) and Lloyd (VK5BR). Loop_Discussion_ExtractsTest (pdf) 9/09/2008  543 Kb   32 pages       Conclusions to the long discussions between Leigh and Lloyd. Conclusions_Loop_Discussions (doc) 13/09/2008   20 Kb Leigh's paper on the concluding correspondence between himself and Lloyd. Note - Leigh's final comment on the discussions is at the top of the file.       Leigh’s Wrap-up Conclusions 3/10/2008   55 Kb

Mike Underhill. G3LHZ