Antenna design and their characterisation

Copolar radiation Pattern.jpeg (47417 bytes) Copolar contours of 38GHz Biconvex lens antenna Copolar contour map around boresight (3 x 3 degrees) of a commercial 38GHz Biconvex horn antenna measured on our antenna test range. Copyright RadiowAve Ltd.
copolar contour map.jpeg (38137 bytes) A copolarised (vertical polarisation) contour map representation of a 38GHz Biconvex lens antenna measured over a 10 x 10 degree region around boresight. Note the sidelobe distribution and levels. Copyright Radiowave Ltd. wpe7.jpg (61703 bytes) Copolarised contour map shown isometrically, of a 38GHz commercial antenna measured on Radiowave's antenna test facility.
crosspolarmap.jpg (51802 bytes) crosspolarised contour map...

A contour map representation of the crosspolarised (horizontal polarisation)
of a 38GHz Biconvex lens antenna measured over a 10 x 10 degree region
around boresight. Note that the cross-polar discrimination is only adequate
around a very small area around the corresponding copolar maximum. These
data demonstrate that, for example, this antenna is not suitable for
orthogonal frequency re-use applications. For more information or
clarification write to info@radiowave.co.uk. Copyright Radiowave Ltd.
wpeB.jpg (63982 bytes) Crosspolar contours of 38GHz Biconvex lens antenna Crosspolar contour Map near boresight of 38GHz Biconvex lens antenna. Measured on antenna test range. Contours show the linearly polarised cross-polar Response. Copyright RadiowAve Ltd. For more details see:
"Millimetre wave antenna Copolar and crosspolar characterisation", URSI symposium. URSI radio science colloquium, July 11-13th, 1994, University of Liverpool. pp 7-1 7-4.
annular.jpg (5650 bytes) Annular ring slot antenna
For more details see:
‘Low Profile Wide band Antenna for DECT applications’, IEE colloquium on ‘Radio frequency design in Mobile Radio transceivers’, 9th, Dec. 1994. Digest No. 1994/242.pp 7-1 7-3.
900mhz.jpg (5850 bytes) 900MHz antenna in an electricity meter.
pitlid.jpg (46745 bytes) 184MHz Water pit lid antenna.
Influence of human body on VHF propagation from a pit lid antenna

 

TE10mode.jpg (20616 bytes) A 300MHz to 2GHz low frequency TE10 mode rectangular horn antenna offering
excellent Cross-polar characteristics and clean radiation pattern. Copyright
Radiowave Ltd.
Log periodic circularly#E67.gif (62486 bytes) Circularly polarised log-periodic antenna used for antenna measurements and
satellite communications applications to 1.8GHz. Copyright Radiowave Ltd.
 log-periodic circularly#E44.gif (65830 bytes) Circularly polarised log-periodic antenna used for antenna measurements and
satellite communications applications to 1.8GHz. Copyright Radiowave Ltd.
VHF-UHF log periodic.gif (65855 bytes) A VHF-1500MHz log periodic antenna used on antenna test range and in EMC
testing. Note the plastic dielectric support pole and Cross-polarisation
facility. Copyright Radiowave Ltd.

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