Post on 13-Jan-2017
HOW TO DESIGN MICROSTRIP PATCH ANTENNA IN ADS 2009
Prepared By,
R.THANDAIAH PRABU M.E., (Ph.D.,)
PRATHYUSHA ENGINEERING COLLEGE, CHENNAI
thandaiah@gmail.com Mobile: +91-9751445529
Microstrip Antenna
Side view
Representative Shapes of Microstrip Patch Elements
Microstrip Line Feed
Equivalent circuits
Co- Axial Feed / Probe Feed
Equivalent circuits
Aperture Coupled Feed
Equivalent circuits
Proximity Coupled Feed
Equivalent circuits
Characteristics Micro Strip Line Feed
Coaxial Feed Aperture Coupled Feed
Proximity Coupled Feed
Spurious Feed Radiation
More More Less Minimum
Reliability Better Poor due to soldering
Good Good
Ease of Fabrication Easy Soldering and Drilling Needed
Alignment required
Alignment required
Impedance Matching Easy Easy Easy Easy
Bandwidth (achieved with Impedance
Matching)
2 to 5% 2 to 5% 21% 13%
Advantages Simple and Easy to Fabricate, it can be eached on the same substrate
Feed can be placed at any
desired direction, Low
spurious radiation
Eliminates spurious radiation
Eliminates spurious radiation
Disadvantages It gives undesired radiation
Narrow bandwidth and
difficult to model
Fabrication Process is difficult
Thickness of antenna increases
Design Calculation for Transmission Line Model
Example
Design a rectangular microstrip antenna using a substrate (RT/DUROID 5880) with dielectric constant of 2.2, h = 0.1588 cm (0.0625 inches) so as to resonate at 10 GHz.
Software Comparison
ADS HFSS CST Advanced Design System
High Frequency Structural Simulator
Computer Simulation Technology
2 D EM Simulator 3 D EM Simulator
3 D EM Simulator
Method of Moment (MoM)
Finite Element Method (FEM)
Finite Integration in Technique (FIT)
Active/passive lumped model simulator
Passive circuit Simulation
passive and Active circuit simulation
ADS – 2009 good choice for both domain
HFSS FEM is much better than CST Frequency Domain
Time domain of HFSS is not as good as CST
How to Design in ADS 2009
Contact: thandaiah@gmail.com
thandaiahprabu.ece@prathyusha.edu.in Mobile: +91-9751445529