Multiband C-Shaped Printed Antenna for Wireless Communication Systems
| Paper File | Download Paper File | | Appear In | 3rd Conference on Application Research and Development (ECTI-CARD 2011) | | Publication Date | 05/05/2011 - 06/05/2011 | | Volume | 1 | | Pages | 94 - 99 | | Author 1 | Punyawi Jamjareekul |
Abstract
This paper proposes a principle of design and construction
about a multiband C-shaped printed monopole antenna for the
existing wireless communication systems. The low frequency
band, 749 922 MHz, can be served the CDMA mobile systems
of CAT Telecom Public Company Limited in Thailand, and the
high frequency band, 1.789 2.831 GHz, can be served the
wireless systems, for example, GSM1800, GSM1900 (1885
1980 MHz), WCDMA/UMTS (3G), WiFi-2.45 GHz, and WiMAX-2.5
GHz etc. Those operating frequency bands are taken into
account at the return loss of 10 dB. The measured results are in
good agreement with the simulated theoretical results. The
measured return loss is lower than the simulated return loss
about 11 dB at the low frequency of 850 MHz and is equal to
-13.5 dB at the high frequency of 2.25 GHz. The bandwidth of
this constructed and measured antenna can be implemented in
wider than the bandwidth of a simulated antenna. Moreover, the
radiation patterns of a proposed antenna are also omnidirectional
in the operating frequency bands as desired. |
