How to design Microstrip patch antenna design in ads 2009

HOW TO DESIGN MICROSTRIP PATCH ANTENNA IN ADS 2009

Prepared By,

R.THANDAIAH PRABU M.E., (Ph.D.,)

PRATHYUSHA ENGINEERING COLLEGE, CHENNAI

[email protected] 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: [email protected]

[email protected] Mobile: +91-9751445529

How to design Microstrip patch antenna design in ads 2009

Engineering

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