This was posted on the Antenna Research group I belong to.. I hope you find it useful.
http://downloads.bbc.co.uk/rd/pubs/whp/whp-pdf-files/WHP091.pdf
Jerry N3RBW
http://downloads.bbc.co.uk/rd/pubs/whp/whp-pdf-files/WHP091.pdf
Jerry N3RBW
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