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Hi kolesov
For what application do you need this printed monopole? A problem of
them is often the (big) ground they need. Often it is better to use a
printed dipole...
One trick is to have the ground plane area end before the edge of the PC card is reached. The radiating element of the monopole is sent off at right angles to the edge of the ground plane area.
OK, OK but if you'd like to design a planar printed monopole, where also
the radiator is 'printed' this won't work. You need a relatively big groundplane...
The radiator is in the plane of the PC card. This is the method used on commercial 802.11b cards with the further reduction in board space by bending the far end of the radiator at a right angle at the far end.
The bend on the end also puts some radiation in the direction of what would have been the end on to the radiator. I would suspect that the efficiency is under 100% and with radiation in all directions the gain would be slightly less than isotropic.
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