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Techniques for Improving Element Bandwidth
Name :Ashish S. PatilRoll no.:14MV009ME MICROWAVE
CONTENT :
Overview
Impedance matching technique for increasing bandwidth of MA
Probe compensation in Thick Microstrip patch
Increasing bandwidth of microstrip antenna by Proximity coupling
Characteristic of two layer electromagnetically coupled RPA
The SSFIP: A global concept for high performance broadband planar antenna
OVERVIEW
Impedance bandwidth
Pattern bandwidth
Gain bandwidth
Impedance matching technique for increasing bandwidth of MA
Bandwidth increase by increasing substrate thicknessOr dielectric constant reduced
But this is limited by inductive Impedance
This problem overcome by use thick substrate with same type Of additional impedance matching to cancel inductance
This paper use Bode Fano criteria to design matching network can Increase impedance bandwidth by 10-12%
Probe compensation in Thick Microstrip patch
Increase the substrate thickness
Inductive effect occur in which probe inductance prevent matching of patch impedance to input connector
This inductive effect can be overcome by adding series capacitorin probe feed circuit
Increasing bandwidth of microstrip antenna by Proximity coupling
Proximity coupling using small open tuning stub
Stub is connected in shunt with feed line
Provide broad bandwidth without excess substrate thickness
Characteristic of two layer electromagnetically coupled RPA
Bandwidth extension technique use two or more stagger tuned Resonator
Implemented with stacked patches or combination of dissimilar Element filled by air
Bandwidth increase from 10 to 20%
The SSFIP: A global concept for high performance broadband planar antenna
SSFIP = Strip-Slot-Foam-Inverted-Patch
Slot size used to increase bandwidth
Foam antenna substrate was used at x band to achieve excess ofbandwidth of 20%
THANK YOU !!!!