Docsity
Log inSign up
Docsity
Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity

Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan

Guidelines and tips
Guidelines and tips
Sell on Docsity
Sell on Docsity
Log inSign up

Prepare for your exams

Study with the several resources on Docsity

Find documents

Prepare for your exams with the study notes shared by other students like you on Docsity

Search Store documents

The best documents sold by students who completed their studies

Search through all study resources
Docsity AINEW

Summarize your documents, ask them questions, convert them into quizzes and concept maps

Explore questions

Clear up your doubts by reading the answers to questions asked by your fellow students

Earn points to download

Earn points by helping other students or get them with a premium plan

Share documents
download point icon20 Points

For each uploaded document

Answer questions
download point icon5 Points

For each given answer (max 1 per day)

All the ways to get free points
Get points immediately

Choose a premium plan with all the points you need

Study Opportunities

Choose your next study program

Get in touch with the best universities in the world. Search through thousands of universities and official partners

Community

Ask the community

Ask the community for help and clear up your study doubts

University Rankings

Discover the best universities in your country according to Docsity users

Free resources

Our save-the-student-ebooks!

Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors

From our blog

Exams and Study
Go to the blog

Optimization of a Dual Band Slot Antenna using ANSYS HFSS and optiSLang, Exercises of Microwave Engineering and Acoustics

Bangalore UniversityMicrowave Engineering and Acoustics

Information on the optimization of a dual band slot antenna using ansys high frequency structure simulator (hfss) and optislang. The challenges in antenna design, simulation setup, and solution process in hfss. It also includes details on optimizing the antenna design to minimize return loss at both frequencies. From the prace autumn school 2013 held at the university of ljubljana.

Typology: Exercises

2014/2015

Uploaded on 05/08/2015

kasarlasatish
kasarlasatish 🇮🇳

5

(1)

5 documents

1 / 11

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
Optimization of a Dual Band
Slot Antenna using ANSYS®
HFSS and optiSLang®
Christian Römelsberger
PRACE Autumn School 2013 - Industry Oriented HPC Simulations, September
21-27, University of Ljubljana, Faculty of Mechanical Engineering, Ljubljana,
Slovenia
pf3
pf4
pf5
pf8
pf9
pfa

Partial preview of the text

Download Optimization of a Dual Band Slot Antenna using ANSYS HFSS and optiSLang and more Exercises Microwave Engineering and Acoustics in PDF only on Docsity!

Optimization of a Dual Band

Slot Antenna using ANSYS

HFSS and optiSLang

Christian Römelsberger

PRACE Autumn School 2013 - Industry Oriented HPC Simulations, September

21-27, University of Ljubljana, Faculty of Mechanical Engineering, Ljubljana,

Slovenia

© 2013 CADFEM GmbH

Antenna Simulation

  • 1 -

 Tricky business to adjust antennas:

 Minimize return loss  Radiation pattern: Main lobe, side lobes  Polarization  Band width  Several bands  Impedance matching: Smooth transition from 50Ω to 377Ω

 Use simulation to

 Validate that antenna design meets requirements.  Gain understanding of the design.  Optimize the design.

© 2013 CADFEM GmbH

HFSS – High Frequency Structure Simulator

  • 3 -

 3D Field Solver

 3D Finite Element Method (FEM)  Boundary Integral (IE)  Mesh Process: Adaptive

 Advanced Boundary Types

 Radiation and Perfectly Matched Layers  Symmetry, Finite Conductivity, Infinite Planes, RLC, and Layered Impedance

 Advanced Material Types

 Frequency dependent  Anisotropic

 Post Processing and Report Type

 SYZ parameters  Field display  Near Field/Far Field

  • 4 - © 2013 CADFEM GmbH

Antennas: Solution Process in HFSS

Create Initial Mesh

Solve fields using the Finite Element Method

Max(|DS|)<goal? Calculate local Solution error

Generate New Mesh

Calculate broad band S-parameters (if desired)

no

yes

Start

First Pass only

Any variable may be

used to define solution

convergence.

Max(|DX|)<goal?

Directivity

Realized Gain

Peak | E |

Stored energy

etc…

mesh refined where

field gradients are largest!

  • 6 - © 2013 CADFEM GmbH

Optimization of a Dual Band Slot Antenna

 Goal: minimize the return loss at both frequencies

  • 7 - © 2013 CADFEM GmbH

Optimization of a Dual Band Slot Antenna

 Set up region

 Set up the simulation for a single design point:

 Boundaries  Radiation on the boundary of the region  Finite conductivity at metalized surfaces  Excitation  Lumped port at the end of the microstrip  Analysis Setup  5.8GHz  2.4GHz with mesh linked to the 5.8GHz setup  Frequency sweep 1.5GHz – 7GHz

 Solve

 Postprocessing

 Return Loss  Currents  Gain

© 2013 CADFEM GmbH

Optimization of a Dual Band Slot Antenna

  • 9 -

 Do a validation check

 Much improved Return Loss

-22.501.00 2.00 3.00 (^) Freq [GHz]4.00 5.00 6.00 7.

-20.

-17.

-15.

-12.

-10.

-7.

-5.

-2.

dB(St(Feed_T1,Feed_T1))

XY Plot 1^ HFSSDesign

m m

Name m1 m2 (^) 2.43005.6900X (^) -19.3580-21.1131Y Setup1 : Sw eep dB(St(Feed_T1,Feed_T1)) Curve Info

  • 10 - © 2013 CADFEM GmbH

Optimization of a Dual Band Slot Antenna

 Resonances