A wide band Microstrip antenna is proposed for Ku band applications with defected groundd structure. A circular shape defect is integrated in the ground plane. A novel equivalent circuit model is proposed for Microstrip patch antenna with defected ground structure. Accurate design equations are presented for the wideband Microstrip antenna and theoretical analysis is done for the proposed structure. The proposed antenna has an impedance bandwidth of 56.67% ranging from 9.8 GHz to 17.55 GHz, which covers Ku-band and partially X-band. The antenna shows good radiation characteristics within the entire band, and has a gain ranging from 5 dBi to 12.08 dBi. Minimum isolation between co-polar and cross-polarization level of 20 dB and 15 dB is achieved in H-plane and E-plane respectively. The simulation of the proposed antenna is done on HFSS v.13, and measured results of fabricated antenna are in good agreement with the theoretical and simulated results

1. ANN model and design of wide bandANN model and design of wide band
Microstrip-line-fed antenna withMicrostrip-line-fed antenna with
defected ground structure for Ku banddefected ground structure for Ku band
applicationsapplications
Presented by:Presented by:
AKSHAT GANGWAR (12EI03)AKSHAT GANGWAR (12EI03)
ASHISH MISHRA (12EI09)ASHISH MISHRA (12EI09)

2. ContentsContents
 Introduction
 Microstrip Antennas
 Different Parameters of Microstrip AntennaDifferent Parameters of Microstrip Antenna
 Different Shapes of Microstrip Patch ElementsDifferent Shapes of Microstrip Patch Elements
 Project Work
 Applications
 Conclusion
 Reference

3. IntroductionIntroduction
 Antenna is one type of transducer that converts
the electrical energy into the electro-magnetic
energy in form of electromagnetic waves.
 According to IEEE standards antenna is a
means of radiating and receiving radio waves, it
is a transitional structure between free space
and guided device.

4.  A Micro-strip patch antenna consists
of a radiating patch on one side of a
dielectric substrate which has a
ground plane on the other side.
 Microstrip antennas are widely used
due to their low profile, ease of
fabrication, and capability of
integration with other device.
Microstrip AntennasMicrostrip Antennas

5. Different Parameters of MicrostripDifferent Parameters of Microstrip
AntennaAntenna
 L = Length of the Microstrip
Patch Element
 W = Width of the Microstrip
Patch Element
 t = Thickness of Patch
 h = Height of the Dielectric
Substrate

6. Different Shapes of MicrostripDifferent Shapes of Microstrip
Patch ElementsPatch Elements

7. Project WorkProject Work
To design the microstrip
line-fed antenna with
defected ground structure
by using HFSS.
ANN modelling of designed
antenna

8. The Design SpecificationsThe Design Specifications
ParametParamet
erer
(mm)(mm) ParametParamet
erer
(mm)(mm)
aa 5.505.50 LLmlml 27.4127.41
rr11 1.501.50 hh 1.61.6
wwmlml 2.302.30 DD 3636

9. Antenna With Defected GroundAntenna With Defected Ground
StructureStructure
(i) Side view (ii) Top view

10. Patch Antenna Covered By AirboxPatch Antenna Covered By Airbox

11. Determination Of Center FrequencyDetermination Of Center Frequency
Using S-parameterUsing S-parameter

12. ApplicationsApplications
 These are used for integratedThese are used for integrated
phased array systems.phased array systems.
 Used in GPS (Sat. NavigationalUsed in GPS (Sat. Navigational
System) technology.System) technology.
 Mobile satellite communications,Mobile satellite communications,
the Direct Broadcast Satellitethe Direct Broadcast Satellite
(DBS) system & remote(DBS) system & remote
sensing.sensing.
 Non-satellite basedNon-satellite based
applications- such as medicalapplications- such as medical
hyperthermia.hyperthermia.

13. Conclusion
 The Microstrip linefed antennaThe Microstrip linefed antenna
with circular shape defect inwith circular shape defect in
the ground plane is designed.the ground plane is designed.
 Accurate designing equationsAccurate designing equations
are presented for widebandare presented for wideband
Microstrip antenna for theMicrostrip antenna for the
proposed structure.proposed structure.

14. Reference
• http://en.wikipedia.org/wiki/Microstrip_antenna
• http://www.microwaves101.com/encyclopedia/anten
• http://dx.doi.org/10.1016/j.aeue.2014.04. 017

15. Thank You!Thank You!