Integration of H-shaped element with rectangular slor for broadband reflectarray antennas
Printed reflectarray antenna is becoming rapid ly an attractive alternative to the more conventional parabolic reflector and phased array antennas due to its advantages such as lighter weight, low loss, easy to maintenance and less cost. However, the reflectarray antenna has a limited bandwidth p...
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| Format: | Conference or Workshop Item |
| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/2363/ http://eprints.uthm.edu.my/2363/1/5.pdf |
| Summary: | Printed reflectarray antenna is becoming rapid ly an attractive alternative to the more
conventional parabolic reflector and phased array antennas due to its advantages such
as lighter weight, low loss, easy to maintenance and less cost. However, the
reflectarray antenna has a limited bandwidth performance due to its elements and
spatial phase delays caused by the different lengths from the feed for each point on the
wave front of the radiated beam. To enhance the static linear phase range and
bandwidth performance of X band reflectarray antenna, this paper presents a novel
technique by employing rectangular slot on H-shaped reflectarray antenna design. The
numerical results based on Finite Integral Method demonstrate that the introduction of
rectangular slot attached on H-shaped patch element is shown to increase the static
linear phase range fro m 135.14
°
to 219.07
°
. Additionally analysis of the static phase
range by using different widths (w) of rectangular slot investigated from 1.00 mm to
4.00 mm shows that 62.11 % imp rovement in phase range performance is achieved
within the frequency variation of 10 GHz to 7.82 GHz which can be applied for tunable
reflectarray antenna systems. The results obtained from this work show that by
introducing variable rectangular slot on H-shaped patch reflectarray antenna the phase
range is shown to be significantly improved which offers high potential for mu ltip le
frequency antenna systems. Several parameters of reflectarray antenna such as
reflection loss, reflection phase, bandwidth performance and static linear phase range
are also discussed in this work. |
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