Design and Simulation of Smart Antenna for D2D Communication

International Journal of Trend in Scientific Research and Development (IJTSRD)
Volume 4 Issue 4, June 2020 Available Online: www.ijtsrd.com e-ISSN: 2456 – 6470
@ IJTSRD | Unique Paper ID – IJTSRD31609 | Volume – 4 | Issue – 4 | May-June 2020 Page 1512
Design and Simulation of Smart
Antenna for D2D Communication
Dr. Arunachalaperumal1, B. S. Aparna2, R. Renugadevi2
1Professor, 2U G scholar,
1,2Department of Electronics and Communication Engineering,
1,2S.A. Engineering College, Poonamalee-Avadi Main Road, Thiruverkadu, Chennai, Tamil Nadu, India
ABSTRACT
Device-to-Device (D2D) communication allows user devices to directly
communicate with each other. D2D using smart antenna will reduce the
interference and also reduce the power with respect to distance between the
devices. This D2D communication generates directional signal transmission
between D2D pairs and reduces the interference between other users. This
study also proposes the study of 4x4(MIMO) microstrip patch antenna for 5G
cellular network. This antenna operatesatthefrequency of3.3-4.2GHZandits
resonant frequency is 3.75GHZ. Rogers RO4350B (lossy) with thickness of
0.101mm and dielectric constant has been used as the antenna
substrate. The simulations results shows that the proposed antenna design
and it explains about the beam forming concepts that provides the need of
D2D communication for 5G application. The antenna is steered to particular
direction with the help of beam forming algorithm. This shows that such
scheme improves the system capacity compared to the traditional one by
focusing it in a desired direction. This methodwill providesecuritytothedata,
increases the network efficiency, consume less power and traffic made by the
signals is reduced.
KEYWORDS: Device to Device communication, Smart antenna, Rogers, Beam
forming
How to cite this paper: Dr.
Arunachalaperumal | B. S. Aparna | R.
Renugadevi "Design and Simulation of
Smart Antenna for D2D Communication"
Published in
International Journal
of Trend in Scientific
Research and
Development(ijtsrd),
ISSN: 2456-6470,
Volume-4 | Issue-4,
June 2020, pp.1512-
1515, URL:
www.ijtsrd.com/papers/ijtsrd31609.pdf
Copyright © 2020 by author(s) and
International Journal ofTrendinScientific
Research and Development Journal. This
is an Open Access article distributed
under the terms of
the Creative
CommonsAttribution
License (CC BY 4.0)
(http://creativecommons.org/licenses/by
/4.0)
I. INTRODUCTION:
Antennas play a vital role in a communication system and it
is used in both transmission and receptionof radiosignals.It
is a metallic object, made up of a wire or collection of wires.
The antenna at the transmitter side converts electrical
energy into electromagnetic waves, whereas a receiver side
antenna converts electromagnetic waves into electrical
energy. The design of an antenna depends on directivity of
the beam and frequency of carrier waves. Antennasareused
in applications like radioand televisionbroadcasting,peerto
peer communication, wireless LAN, cell phones, radar etc.,
Device to Device communication allows user devices
proximity (nearness) to directly communicate with each
other. D2D allows users to experience increased data rate
and reduced energy consumption. It is currently being
specified by 3GPP in LTE, focussing on public safety
applications and proximity based service. Direct
communicationbetween nearbymobiledeviceswill improve
spectrum utilization. D2D is exploiting the potential of full-
duplex communications. Integration of several antenna
technologies and D2D enhances the capacityandcoverageof
cellular networks. Device to Devicecommunicationisa short
range technology in communication, in which data is
exchanged between devices. Combining the cellular
communication and D2D can get spectrum efficiency. Beam
forming technique is seem to be good for D2D
communication. Factors used for computing beam forming
are gain, position, phase angle,lengthofthe beam,numberof
patterns and interference. In beam forming technique the
beam pattern, main beam and sidelobearecalculated.Smart
antenna comprises of one or more antennas. It is an antenna
system which dynamically reacts to its surrounding for
providing good signals and usage of frequencies forwireless
communication. There are variety of smart antenna usedfor
several applications. There is a need for smart antenna
because of limited allocation of spectrum, mobility of users
give rise to signal fading,powerconstrainsinmobiledevices,
and interference due to frequency reuse.
MIMO (Multiple Input Multiple Output) communication
methods are based for using a number of transmit antennas
and its signals are received by a number of receivers. Hence
there are number of paths between the transmitter and
receiver. The MIMO system increases the channel capacity
and allows several users to access various services at the
same time. MIMO technique is a proven solution for the
disadvantages in short range communication. Antenna
dimensions and isolation coefficients are the two major
criteria to be considered in MIMO antenna design.
IJTSRD31609

International Journal of Trend in Scientific Research and Development (IJTSRD) @ www.ijtsrd.com eISSN: 2456-6470
II. Antenna design:
The proposed antenna is printed on a Roger RO4350B
substrate having dielectric constant of 3.8, a tangent loss of
0.0037 and thickness of 0.101mm and simulated in the
frequency range from 3.3 to 4.2GHZ. In this design four
patches are placed on a single substrate and the feed line of
each patch is designed with an input impedance of 50 ohms.
Each patchis connected using the feed line. The height of the
transmission path is 1.5 mm and the width of the feed is
calculated as 3.4mm.
The steps for designing microstrip patch antenna is given
below,
Step 1: To calculate the Width (W)
Step2: To calculate the Effective Dielectric Constant,
+
Step 3: To calculate the Effective length,
Step 4: To calculate the length extension ΔL,
Step 5: To calculate the actual length of the patch,
Where , L, W represent resonant frequency(HZ), length,
width respectively. is a effective dielectric constant,
is incremental length of patch, C is the speed of light in free
space which is 10^8(m/s), h is the substrate height or
thickness. Here the thickness of the substrate is taken as
2mm. The gap between patch and feed(Gpf)istakenas1mm
and the material used for the ground is copper which is
made at the bottom of substrate and its thickness is taken as
2mm in the proposed design. The values of different
parameters is shown in table 1.
TABLE 1: Microstrip Antenna Specification
Parameters Values(mm)
Ground length(Lg) 79
Ground Width(Wg) 59
Substrate length(L) 79
Substrate Width(W) 59
Patch Length(Lp) 35
Patch Width(Wp) 23
Transmission path length 35
Transmission path width 45
Thickness of substrate 2
From the specification in Table 1 the antenna is designed as
shown in Figure 1
Figure 1: MIMO 4x4 Antenna design
Figure 1 shows the design of 4x4 MIMO antenna. Multiple
Input Multiple Output (MIMO) increases signal-capturing
power at the receiver side by enabling theantennas to
combine data streams arriving at different times and from
different paths. Here these 4 antenna act as a transmitter as
well as receiver. It enables the transmission of more than
one signal to one user via the same set of air interface
resources.
III. SIMULATION RESULTS
The antenna was designed and simulated using CST Studio
Suite. The performance of the antenna has been observed
and the simulation results of return loss, Voltage Standing
Wave Ratio (VSWR), bandwidth obtained and directivity are
shown in the following figures.
A. S Parameter
In an electrical system a scattering parameter generally
describes the relationship betweeninput-outputports.TheS
Parameter of this antenna like return loss, reflection
coefficient can be obtained from this Figure 2. The obtained
resonant frequency is 3.6 GHZ and return loss is -40.045 dB.
The Bandwidth calculated from S Parameter is 40MHZ as
shown in Figure 2.
Figure 2 S Parameter of Designed Antenna
B. VSWR
Voltage Standing Wave ratio (VSWR) is a function of
reflection coefficient which describes the measure of how
much power is delivered to an antenna.ThevalueofVSWR is
always real and positive number of antenna. Low value of
VSWR indicates a good antenna match. HeretheVSWR value
of this antenna is 1.05. Since the value of VSWR is under 2 it
is considered for antenna applications.

Figure 3 VSWR Measurement Of Antenna
C. Directivity
Directivity is a measure of how directional an antenna’s
radiation pattern is. It is a fundamental parameter of
antenna. The directivity of main lobe of antenna is 7.32 dBi
at 12 degree theta direction. The side lobe level is -9.1 dB as
shown in Figure 4. The antenna radiation pattern in
3Dimention is shown in Figure 5, which gives the value of
antenna gain as 7.57 and the efficiency of the antenna is
obtained as -9.522 or 33.4118 %.
Figure 4 Radiation Pattern of Antenna
Figure 5 Radiation Pattern of Antenna in 3D
IV. Beamforming
The wireless communication widely uses a smart antenna,
beacause the smart antenna has a ability to increase the
capacity and network coverage of a communication system.
The two main functions performed by smart antenna are
direction of arrival(DOA) and beamforming. Using this
beamforming algorithm smart antenna forms a main beam
towards the users desired direction and does not send the
beam in the interference direction.
Beamforming uses the science of electromagnetic
interference that makes a fifth generation(5G) connection
more accurate. To describe a system a term MIMO is used
where multiple transmitters or multiple receivers are
present. This beamformingtechniquefocusesa signal onlyin
a specific direction where the receiver is present ratherthan
transferring the signal in all direction. This paper explains
about the beamforming for MIMO-OFDM systems. There are
different parts of systems such as single-input-multiple-
output (SIMO) or multiple-input-single-output (MISO)
system. This paper illustrates a 8-element uniform linear
array (ULA) is implemented at the base station as the
transmitter and the receiver is a mobile unit with a single
antenna.
The configured system is given below, a power transmitted
is 8 watts and a gain transmitted is -8 dB. The receiver
mobile signal is positioned and located away 2750 meters
from the transmitter. An interference with a power of1watt
and a gain of -20 dB is located at 9000 meters away and 20
degrees off the transmitter's side. Figure 6 shows the output
of a beam which steers in a desired direction.
Figure 6 Beamforming for MIMO system
Signal transmission is done by configuring the system’s
transmitter. The components present in transmitter sub-
system are convolution encoder,thescrambler,andtheQAM
modulator. Before the radiation the message is converted in
to a information bit stream and then passed.Adata iscarried
in OFDM by multiple sub-carriers. The data stream is
radiated in the array from a antenna then the array is
steered towards a given steering angle.
Signal reception is done by the receiving antenna, that
collects both the interference signal and propagation
signal.To recover the original information, the MIMO-OFDM
system performs different stages at the receiver side they
are, OFDM de-modulator, Viterbi decoder, QAM de-
modulator and equalizer.
A decoded output is compared with the original message
stream. While comparing the Bit error rate(BER) is high for
this communication system. It refers that the mobile is

aligned with the steering direction, shows that the BER is
improved. Figure 7 shows the constellation diagram,
Figure 7 Constellation diagram
V. CONCLUSION
In this paper 4x4 MIMO microstrip patch antenna has been
designed and simulated for 5G applications. The designed
antenna works in the frequency range of 3.3GHZ to 4.2GHZ.
It has a return loss of -40.045dB at 3.6GHZ and the gain
value is 7.57 and the efficiency is -9.522 or 33.441%.
Antenna is designed with beamforming algorithm. This
algorithm helps to steer theantenna ina particulardirection,
which improves the system capacity.
REFERENCES
[1] Qing Shen1,a, Tiantian Guo1, and Yaozhi Du1“
Reconfigurable Antenna Beamforming in Device to
Device Communication journal in Applied Mechanics
and Materials Vol 740 (2015) pp 819-822
[2] Nagaraj Hanchinamani1 and Dr. C.R. Byrareddy “ A
Multiband MIMO Microstrip Patch Antenna for
Wireless Applications” in International Journal for
Research in Applied Science & EngineeringTechnology
(IJRASET)
[3] Constantine Balanis A john book: “Antenna theory
Analysis and design”
[4] Mohammed A. Almagboul, FengShu, Yaolu Qin, Xiaobo
Zhou, Jin Wang, YuwenQian, and Kingsley Jun
ZouNational “An Efficient Hybrid BeamformingDesign
for Massive MIMO Receive Systems via SINR
Maximization Based on an Improved Bat Algorithm”
NaturalScience Foundation of China
[5] Jayarenjini N, and UnniC A Novel Microstrip “Slotted
Patch Antenna using Different DielectricSubstratesfor
Multiple Applications”,International Journal ofApplied
Engineering Research ISSN 0973-4562 Volume 13,
Number 16 (2018) pp. 12591-12596
[6] Broad band India forum “Roadmap for 5G in India”.
[7] Amara PrakasaRao, “Adaptive Beamforming
Algorithms for Smart Antenna Systems” WSEAS
transactions on communications.
[8] Manoj Thakur and VikramPratapsingh “Review of
Different Structure and application of MicrostripPatch
Antenna” International Journal of Engineering and
Management Research Volume-4, Issue-4, August-
2014, ISSN No.: 2250-0758
[9] RafiaNishatTomaa*, ImtiajAhmmedShohagha,
MdNazmulHasana “Analysis the effect of Changing
Height of the Substrate of Square Shaped Microstrip
Patch Antenna on the Performance for 5G Application”
I. J. Wireless and Microwave Technologies, 2019,3,33-
45 Published Online May 2019 in
MECS(http://www.mecs-press.net)
[10] https://www.mathworks.com/help/phased/examples
/beamforming-for-mimo-ofdm-systems.html

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