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ETMSA WITH AND WITHOUT SHORTING
PINS
PRESENTED BY:
Vinutha P22EC001
Pawan Maurya P22EC010
UNDER THE GUIDANCE OF RAMYA RADHAKRISHNAN MAM
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AIM OF THE PROJECT
►
ETMSA WITHOUT SHORTING PINS
►
SHORTED 60 SECTOR
►
COMPLIMENT OF SHORTED 60 SECTOR
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INTRODUCTION
►
Microstrip antenna is printed antenna. Most popular MSA is Patch
antenna.
►
If the shape of the patch is equilateral triangle, then it is known as
EQUILATERAL TRIANGULAR PATCH ANTENNA.(ETMSA).
► Patch Antenna Contains
Ground(Metal),Substrate(dielectric),Patch(metal).
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INTRODUCTION
❑
Ground plane is not etched out.
❑
Substrate between patch and ground plays an important role in the
design since it decides the bandwidth as well as the size of
microstrip antenna.
❑
If dielectric constant increases, it decreases Bandwidth, increases
Q factor, decreases impedance bandwidth.
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SUBSTRATES
❑ Arlon/Duroid- Used(epsilon=2.5)
▪ Loss tangent is small
▪ Cost is very high.
❑ Alumina
❑ Glass epoxy
❑ Foam
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ETMSA
❑
Triangular microstrip antenna is used commonly in wireless
communication.
❑
It has omnidirectional radiation pattern.
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DESIGN
❑
Resonant frequency of the triangular patch antenna is
❑
Where Se is Electrical length of the radiating side and S is the physical
length of radiating side.
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EXPLANATION
❖ Feed is given in central axis to make it symmetrical.
❖ This is not completely symmetrical, Hence cross polar component is more.
❖ 0 field point is at centroid.
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Shorting Pins
❑
Shorting pins are used to achieve various performance characteristics of microstrip patch
Antennas.
❑
Appropriately placing shorting pins can be used to tune the resonant frequencies of the
triangular patch antenna.
❑
Using shorting pin reduces patch size and this technique is used to obtain larger
bandwidth.
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ETMSA WITHOUT SHORTING PIN
GROUND
SUBSTRATE
PATCH
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ETMSA WITHOUT SHORTING PIN
INNER AND OUTER CONDUCTORS
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ETMSA WITHOUT SHORTING PIN
FEED
FINAL SET UP
ETMSA WITHOUT SHORTING PIN
S PARAMETER
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ETMSA WITHOUT SHORTING PIN
SMITH CHART
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ETMSA WITHOUT SHORTING PIN
VSWR v/s FREQUENCY
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ETMSA WITHOUT SHORTING PIN
POLAR PLOT
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ETMSA WITHOUT SHORTING PIN
RADIATION PATTERN
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ETMSA WITH SHORTED 60 SECTOR
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ETMSA WITH SHORTED 60 SECTOR
ETMSA WITH SHORTED 60 SECTOR
S PARAMETER
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ETMSA WITH SHORTED 60 SECTOR
SMITH CHART
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ETMSA WITH SHORTED 60 SECTOR
VSWR V/S FREQUENCY
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ETMSA WITH SHORTED 60 SECTOR
RADIATION PATTERN
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ETMSA WITH SHORTED 60 SECTOR
POLAR PLOT
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ETMSA WITH SHORTED COMPLIMENTED
60 SECTOR
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ETMSA WITH SHORTED COMPLIMENTED
60 SECTOR
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ETMSA WITH SHORTED COMPLIMENTED 60
SECTOR
S PARAMETER
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ETMSA WITH SHORTED COMPLIMENTED 60
SECTOR
SMITH CHART
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ETMSA WITH SHORTED COMPLIMENTED 60
SECTOR
VSWR v/s FREQUENCY
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ETMSA WITH SHORTED COMPLIMENTED
60 SECTOR
RADIATION PATTERN
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ETMSA WITH SHORTED COMPLIMENTED
60 SECTOR
POLAR PLOT
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OBSERVATION TABLE
Patch type
fo(GHz)
S11(dB)
VSWR
B.W (MHz)
Impedance
Matching(Oh
m)
Area(cm2)
ETMSA without
shorting pin
TMSA with
shorted 60o
Sector-
2.99
-27.64
1.102
42
50.57
6.92
3.0157
-26.71
1.148
35.8
50.76
2.78
TMSA with
Compliment
shorted 60o
Sector-
3.077
-25.02
1.152
33.7
50.8
4.14
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ADVANTAGES
❏
Light weight, Low cost, low profile and conformal.
❏
Easy to fabricate and can be integrated with other
microstrip component.
❏
This antenna is compatible with modular design.
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DISADVANTAGES
❏ Low power handling capacity.
❏ Narrow bandwidth.
❏ Poor isolation between Feed and Radiating element.
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APPLICATIONS
► Bluetooth
► Wifi
► Cellular
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CONCLUSION
► Size of antenna is reduced
► Bandwidth Increased.
► Impedance matching is achieved.
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REFERENCES
Antenna, Prof.Girish kumar Youtube videos
Dual-band circularly polarized equilateral triangular-patch array antenna for
mobile satellite communications.
December 2005
IEEE Transactions on Antennas and
Propagation 53(11):3477 - 3485
DOI:1 0.1109/TAP.2005.858849
Source
IEEE Xplore
Project: Antennas for Satellite Communication
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THANK YOU!!