INTERNATIONAL JOURNAL FOR RESEARCH IN EMERGING SCIENCE AND TECHNOLOGY, VOLUME-3, ISSUE-4, APR-2016
E-ISSN: 2349-7610
ME Dipole Antenna Array in Planar Configuration
using CRLH transmission line
U.Vinitha1
1
Vinitha, Electronics and Communication Engineering, SIET, L&T Bypass, Coimbatore, India
1
[email protected]
ABSTRACT
In today’s modern world, dual polarized antenna plays a vital role in the field of antenna designs. The features such as increased
gain, wider bandwidth, reduced multipath fading is responsible for creating a ME dipole antenna array. Therefore, the aim is to
design a planar Magneto-Electric (ME) dipole antenna array which is the combination of magnetic as well as electric dipoles,
using composite right/left handed transmission lines (CRLH) and the performance is compared with the ME dipole antenna
excited by single source. A linear and circular configuration of a planar ME dipole antenna array based on CRLH transmission
line is designed and the results is compared with the linear and circular configuration of a planar ME dipole antenna array with
single source using FEKO simulator.
Keywords: Magneto-Electric (ME) dipole, Composite right/left handed (CRLH) transmission line, Antenna radiation pattern,
Theta gain and Phi gain.
integrated with differential amplifiers for beam shaping and
1. INTRODUCTION
The combination of the two fundamental types of radiators,
beam forming applications.
namely, magnetic and electric dipoles, into a Magneto Electric
(ME) antenna is called Magneto Electric Dipole antenna. This
may offer enhanced performance and functionalities`. The
concept of collocated magnetic and electric dipole radiators
has recently attracted considerable attention due to the
increased demand for versatile and switchable characteristics
in modern communication systems. Applications include anti
collisions for transport vehicle systems, multiple input
multiple output systems for high speed communications and
enhanced polarization diversity MIMO systems. The ME
antenna produce an identical E- and H- plane radiation
patterns which are obtained by exciting simultaneously electric
dipole and a magnetic dipole. The new wideband magnetoelectric dipole antenna is used for
various wireless
communications. It reveals good electrical characteristics,
including low back-lobe radiation, low cross polarization, and
stable antenna gain across the operating band and symmetrical
radiation patterns in the E- and H-planes. The intrinsic
1. 1. MAGNETO-ELECTRIC DIPOLE ANTENNA ARRAY
The magneto-electric dipole antenna is excited by single
differential feed. The design consists of magnetic loop dipole
and a electric dipole place within it along the radial direction
and excited by single differential port with impedance Z0 ≠0,
placed on the other side of the loop in which the structure
transforms a resonant type into a travelling wave type antenna.
Thus converting ME-dipole antenna into a travelling wave
type antenna enables the realization of ME-dipole antenna
array by extending the number of rings that offers the
possibilities of enhanced gain and directivity performance.
This structure may be seen as a phase array antenna, where
each circular unit consisting of electric and magnetic dipole
antennas radiates a leaky wave following CRLH dispersion
characteristics. The gain of the magnetic loop dipole is small
but it can be theoretically improved by increasing the size of
the loop while maintaining the stable current along the loop.
differential nature of ME-dipole antenna is compatible with
high density circuits and, in particular can be naturally
VOLUME-3, ISSUE-4, APR-2016
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INTERNATIONAL JOURNAL FOR RESEARCH IN EMERGING SCIENCE AND TECHNOLOGY, VOLUME-3, ISSUE-4, APR-2016
E-ISSN: 2349-7610
shown in Figure4 and the gain is about 36.5dB and is Omni
2. SIMULATION PERFORMANCE
A magneto-electric dipole antenna array based on the CRLH-
directional.
TL implementation and using single source is designed using
FEKO simulator and the results is compared and analyzed.
2.1 RESULTS OBTAINED FOR LINEAR ME DIPOLE
ANTENNA
ARRAY
USING
SINGLE
SOURCE
IN
PLANAR CONFIGURATIONS
The merged ME dipole anteanna array with single source in
the planar configuration is shown in Figure1. The linear
configuration of ME dipole antenna array with N=8 is shown.
Figure3 Theta gain of linear ME dipole antenna array with N=8
It is designed at the frequency of about 14.25dB.
Figure1 Merged ME dipole antenna with single source with N=8
Figure4 Phi gain of linear ME dipole antenna array with N=8
The corresponding radiation pattern for the merged planar ME
2.2 RESULTS OBTAINED FOR CIRCULAR MAGNETO-
dipole antenna array in linear configurations is shown in
ELECTRIC DIPOLE ANTENNA ARRAY USING SINGLE
Figure2. The radiation pattern of merged linear ME dipole
SOURCE IN PLANAR CONFIGURATIONS
antenna array is designed at the frequency of about 14.25GHz
and the design has the gain of about 40dB. The dipoles are
excited simultaneously with Z0=0 at the terminals, such that
the ring is excited from the two antipodal points and the array
The Merged ME Dipole Antenna Array with single source in
planar configurations with 3-D pattern is shown in Figure 5.
The circular configurations of ME dipole antenna array with
N=8 is shown at equal radius around the loop. It is designed at
pattern of about N=8 is then created.
the frequency of about 14.25dB.
Figure2 Radiation pattern of linear ME dipole antenna array with N=8
The theta gain of linear ME dipole antenna array at the
frequency of about 14.25GHz is shown in Figure3 and the gain
is about 40dB. The theta gain is unidirectional directed along
z-axis. Similarly, the Phi gain of linear Magneto-Electric
Figure5 Merged ME dipole antenna with single source with N=8
The circular array shows high gain when compared with the
linear array. The array is created in planar configuration by
using FR-4 substrate. The ME dipole antenna array is analyzed
dipole antenna array at the frequency of about 14.25GHz is
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INTERNATIONAL JOURNAL FOR RESEARCH IN EMERGING SCIENCE AND TECHNOLOGY, VOLUME-3, ISSUE-4, APR-2016
at the frequency of about 14.25GHz. The circular array is
o
E-ISSN: 2349-7610
2.3 RESULTS OBTAINED FOR LINEAR MAGNETO-
created with radius of about 45 on a planar substrate created
ELECTRIC DIPOLE ANTENNA ARRAY BASED ON
using multilayer planar ground in the construct tab. The
CRLH-TL IN PLANAR CONFIGURATIONS
radiation pattern of circular configuration of ME dipole
antenna array with N=8 is shown in Figure6. The pattern has
the gain of about 157dB with maximum power radiates along
The Linear Magneto-Electric dipole antenna array
based on the Composite Right/Left handed Transmission Line
(CRLH-TL) is shown in Figure9. The Composite right/left
z axis.
handed implementation of the ME dipole operating in the
balanced condition and radiating into the half space above the
ground plane is shown in the Figure 4.9. It is observed that
CRLH is a unit cell consists of series and shunt inductance and
capacitance.
Figure6 Radiation pattern of circular ME dipole antenna array
The Theta gain of circular Magneto Electric
dipole antenna array at the frequency of about 14.25GHz is
shown in Figure7 and the gain is about 140dB. The theta gain
is unidirectional directed along z-axis. Similarly, the Phi gain
of circular Magneto-Electric dipole antenna array at the
frequency of about 14.25GHz is shown in Figure8 and the gain
is about 156.5dB and is Omni directional.
Figure9 Linear ME dipole antenna array using CRLH-TL with N=8
The implementation of CRLH-TL is the metal-insulatormetal (MIM). It is designed in the form of parallel plate
capacitor which consists of two metals with dielectric space in
middle. The CRLH-TL acts as a unit cell with a combination
of both Right handed and Left handed Transmission line
which behaves as a Band Pass filter. The radiation pattern for
linear Magneto-electric dipole antenna array using CRLH-TL
is shown in Figure10. It is observed that the gain of ME dipole
antenna using CRLH has more gain of about 180dB compared
Figure7 Theta gain of circular ME dipole antenna array with N=8
to the single source of linear ME dipole antenna array.
Figure8 Phi gain of circular ME dipole antenna array with N=8
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INTERNATIONAL JOURNAL FOR RESEARCH IN EMERGING SCIENCE AND TECHNOLOGY, VOLUME-3, ISSUE-4, APR-2016
Figure10 Radiation pattern of linear ME dipole antenna array with
E-ISSN: 2349-7610
Figure13 Circular ME dipole antenna array using CRLH (N=8)
The Theta gain of linear Magneto Electric dipole antenna
The circular configuration of ME dipole antenna array
array based on the implementation of composite right/left
based on the CRLH-TL is designed at the frequency of about
handed transmission line at the frequency of about 14.25GHz
14.25GHz The periodic structure of CRLH acts as a band pass
is shown in the Figure 11 and the gain is about 140dB which is
filter which operates for microwave frequencies. The ME
higher compared to single source of ME dipole antenna array.
dipole antenna array using CRLH implementation is created
The theta gain is unidirectional directed along z-axis.
on the FR-4 substrate that acts as a dielectric material. The
Similarly, the Phi gain of linear Magneto-Electric dipole
radiation pattern for the ME dipole antenna array based on the
antenna array using CRLH implementation at the frequency of
CRLH transmission line is shown in Figure14. It is observed
about 14.25GHz is shown in Figure12 and the gain is about
that the radiation pattern of ME dipole antenna in circular
171.5dB and is Omni directional N=8
configuration shows gain of about 320dB which is better than
linear configuration and also to the ME dipole antenna array
with single source.
Figure11 Theta gain-Linear ME dipole antenna array (N=8)
Figure14 Radiation pattern of circular ME dipole antenna array using CRLH
(N=8)
The Theta gain of circular Magneto Electric dipole
antenna array based on the implementation of composite
right/left handed transmission line at the frequency of about
14.25GHz is shown in Figure15 and the gain is about 300dB
Figure12 Phi gain-Linear ME dipole antenna array (N=8)
which is higher compared to single source of ME dipole
2.4 RESULTS OBTAINED FOR CIRCULAR ME DIPOLE
antenna array. The theta gain is unidirectional directed along
ANTENNA ARRAY USING CRLH-TL IN PLANAR
z-axis. Similarly, the Phi gain of circular Magneto-Electric
CONFIGURATIONS
dipole antenna array using CRLH implementation at the
frequency of about 14.25GHz is shown in Figure16 and the
The circular ME dipole antenna array based on the
gain is about 309.5dB and is Omni directional.
Composite Right/Left handed Transmission Line (CRLH-TL)
is shown in Figure13.
Figure15 Theta gain of circular ME dipole antenna array using CRLH (N=8)
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INTERNATIONAL JOURNAL FOR RESEARCH IN EMERGING SCIENCE AND TECHNOLOGY, VOLUME-3, ISSUE-4, APR-2016
E-ISSN: 2349-7610
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Figure16 Phi gain of circular ME dipole antenna array using CRLH (N=8)
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3. CONCLUSION
The magneto electric dipole antenna array in planar
wider bandwidth”, Microwave conference, pp.686-689.
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[7] Kunpeng Wei, zhijun zhang and Magdy F. Iskander (2012,
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