Paper size a number of different sizes were defined for large sheets of paper, and paper sizes were defined by the sheet name and the number of times it had been folded. Thus a full sheet of "royal" paper was 25 × 20 inches, and "royal octavo" was this size folded three times, so as to make eight sheets, and was thus 10 × inches. Imperial sizes were used in the United Kingdom and its territories. These sizes are no longer commonly used since the UK switched to ISO sizes. Many of these sizes were only used for making books (see bookbinding),
Folded unipole antenna conventional series-fed unipole. Therefore ground system losses for these two radiator configurations are very similar. B.L. Cox and J.R. Moser of Kintronic Laboratories have performed a folded-unipole study of considerable depth. A possible improvement over the basic folded-unipole antenna is the “self resonant” unipole antenna, described in . Another possible improvement to the folded-unipole is described in . Folded unipole antenna The folded unipole antenna is a type of monopole antenna; it consists of a vertical metal rod or mast mounted over a conductive surface called a ground plane. The mast is surrounded by a "skirt" of vertical wires electrically