Deepu, V; Rohith, K R; Manoj, J; Suma,M N; Vasudevan, K; Aanandan,C K; Mohanan, P(Electronics Letters, January 18, 2007)
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Abstract:
A compact dual-band uniplanar antenna for operation in the 2.4/5.2/5.8 GHz WLAN/HIPERLAN2 communication bands is presented. The dual-band antenna is obtained by modifying one of the lateral strips of a slot line, thereby producing two different current paths. The antenna occupies a very small area of 14.5times16.6 mm2 including the ground plane on a substrate having dielectric constant 4.4 and thickness 1.6 mm at 2.2 GHz. The antenna resonates with two bands from 2.2 to 2.52 GHz and from 5 to 10 GHz with good matching, good radiation characteristics and moderate gain
Gopikrishna, M; Deepti Das, Krishna; Aanandan,C K; Mohanan, P; Vasudevan, K(Wiley InterScience, April , 2009)
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Abstract:
The design and performance of a stepped slot printed monopole antenna in the ultrawideband is presented in this article. Multiple resonances generated by the stepped slot geometry are matched in the ultrawideband using a modified microstrip feed. The impedance bandwidth (SWR < 2) of the antenna is from 3 to 11 GHz. Radiation patterns are stable and omnidirectional with appreciable gain throughout the band. Performance of the antenna is also analyzed in the time domain, which reveals good pulse handling capabilities. Compact geometry of the antenna allows easy commercial deployment.
Sona,Kundukulam O; Dr.Aanandan, C K(Cochin University of Science and Technology, June , 2002)
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Abstract:
The practical applications of microstrip antennas for mobile systems are in
portable or pocket-size equipment and in vehicles. Antennas for VHFIUHF handheld
portable equipment, such as pagers, portable telephones and transceivers,
must naturally be small in size, light in weight and compact in structure. There is
a growing tendency for portable equipment to be made smaller and smaller as the
demand for personal communication rapidly increases, and the development of
very compact hand-held units has become urgent.In this thesis work, main aim is to develop a more and more reduced sized
microstrip patch antenna. It is well known that the smaller the antenna size, the
lower the antenna efficiency. During the period of work, three different compact
circular sided microstrip patches are developed and analysed, which have a
significant size reduction compared to standard circular disk antenna (the most
compact one of the basic microstrip patch configurations), without much
deterioration of its properties like gain, bandwidth and efficiency. In addition to
this the interesting results, dual port operation and circular polarization are also
observed for some typical designs of these patches. These make the patches
suitable for satellite and mobile communication systems.The theoretical investigations are carried out on these compact patches. The
empirical relations are developed by modifying the standard equations of
rectangular and circular disk microstrip patches, which helps to predict the
resonant frequencies easily.
Description:
Department of
Electronics, Cochin University of Science and Technology