Final Presentation edited by Dr MBI

DESIGN AND PERFORMANCE OF DESIGN AND PERFORMANCE OF CANTENNA FOR WIRELESS LOCAL CANTENNA FOR WIRELESS LOCAL

AREA NETWORK AREA NETWORK

PREPARED BY:MANIKUMAR A/L MARIMUTHO (GP00179)

SUPERVISOR:PROF. DR. MAHAMOD BIN ISMAIL

Introduction Problem Statement Research Objectives Methodology Results and Discussion Conclusion Future Work

OUTLINEOUTLINE

Wireless Local Area Network (WLAN) is very popular for last mile access.

Various WLAN standards: IEEE 802.11a/b/g/n WLAN operate in Line-of-Sight (LOS) and

indoor environment and subjected to multipath fading and signal blockage ~ within 100 – 300 meters with different data rates.

High gain antenna enable WLAN to increase their range and accommodate higher data rate

CANTENNA is a directional waveguide antenna for long-range wireless LAN used to increase the range of existing wireless network connection.

INTRODUCTIONINTRODUCTION

•Among problem encounter using typical low gain WLAN antenna:

limited distance accessWeak signal reception and subject to the interferenceData packet loss when surfing the internet

at long range.• High gain antenna (Cantenna)

Provide a method to extend the wireless coverage Provide a method to extend the wireless coverage distance ~ up to 1 kmdistance ~ up to 1 kmMore practical to use directional antenna than More practical to use directional antenna than omidirectional antennaomidirectional antennaCheaper prizeCheaper prizeVery practical to develop own CantennaVery practical to develop own Cantenna

PROBLEM STATEMENTPROBLEM STATEMENT

To study various types and factors influencing the WLAN antenna performance

To design and develop the can-based antenna for WLAN IEEE802.11 b/g application

To measure and analyze the cantenna performance in the real WLAN environment

RESEARCH OBJECTIVESRESEARCH OBJECTIVES

Among the methods involved includes as follows: Cantenna Design Specification Cantenna Design using software Cantenna Construction/Building Cantenna Testing WiFi Performance using Cantenna

METHODOLOGY (1/13)METHODOLOGY (1/13)

Learn about wireless network.Literature review about antenna .Learn about the cantenna design. Learn to use software to design the cantenna and graph simulation techniques for comparison .Hardware requirement survey.Build the cantenna.Compare and analysis performance cantenna.Full report based on result.

METHODOLOGY (2/13)METHODOLOGY (2/13)

METHODOLOGY (3/13)METHODOLOGY (3/13)- Hardware Requirement- Hardware Requirement

Can or Aluminum. Can or Aluminum.

WiFi Wireless Adapter with External Jack.WiFi Wireless Adapter with External Jack. RP-SMA Connector (N-Type-Male). RP-SMA Connector (N-Type-Male).

A N-Female chassis mount connector.A N-Female chassis mount connector.

Small nuts and bolts. Small nuts and bolts.

METHODOLOGY (4/13)METHODOLOGY (4/13)- Design Parameters- Design Parameters

D is the interior diameter of the can Lo is wavelength in open air = 0.122 meters Lc is wavelength at lower dominant mode cut off frequency >Lu is wavelength at higher dominant mode cut off frequency Lg is standing wavelength inside can Lc = 1.706D Lu = 1.306D Lg = 1 / (sqr_rt{(1/Lo)2 - (1/Lc)2})Ideally operating range :Lower cut-off frequency should be lower than 2400 MHz >Upper cut-off should be higher than 2480 MHz REF (http://www.thedropzone.co.nz/cantennacal.htm)


http://www.thedropzone.co.nz/cantennacal.htm

Java Based CalculatorJava Based Calculator

http://flakey.info/antenna/waveguide/#calculator


METHODOLOGY (7/13)METHODOLOGY (7/13)- Software Design- Software Design

METHODOLOGY (8/13)METHODOLOGY (8/13)- Software Design- Software Design

Radiation Pattern/Current Distribution

METHODOLOGY (9/13)METHODOLOGY (9/13)- Cantenna Construction- Cantenna Construction

Experiment 1Objective: To Determine Signal. Strength

Using Netstumbler.Using four type of CANTENNA :- JULIES POTATO Can, PRINGLES Can, CANTENNA 1 and CANTENNA 2Experiment 2

Objective : Test for maximum distance covered.

CANTENNA 2 usedNeed Ad-hoc Network SetupSet an access point and ping to the access point.Move away with collecting results.

METHODOLOGY (10/13)METHODOLOGY (10/13)- Field Testing- Field Testing

Two different Access Point Testing at MMU,CyberjayaTwo different Access Point Testing at MMU,Cyberjaya About 200 meter from CITS Lab

About 500 meter from Library


Two different Access Point Testing at MMU, CyberjayaTwo different Access Point Testing at MMU, Cyberjaya

First access point at CITS

Second access point at Library

Static Network


10.10.10.1 10.10.10.2ping

Ping about 600 meter away

Ping about 1200 meter away

Static


Results 1Results 1stst Access Point Access Point

JULIE POTATO PRINGLES POTATO

CANTENNA 1 CANTENNA 2

RESULTS (1/9)RESULTS (1/9)

Results 2nd Access PointResults 2nd Access Point

JULIE POTATO PRINGLES POTATO

CANTENNA 1 CANTENNA 2


ComparisonComparisonFirst Access Point :

Second Access Point :


No noiseAll stable at first access pointMore than -79dBmSecond access point cause drop in signal strength Between -84dBm to -73dBmCANTENNA 2 receive better signal


Ad-Hoc Network SetupAd-Hoc Network SetupRESULTS (5/9)RESULTS (5/9)

Ad-Hoc Network SetupAd-Hoc Network SetupRESULTS (6/9)RESULTS (6/9)

RESULTS (7/9)RESULTS (7/9)Ping test around 300-800mPing test around 300-800m

Packet Sent =3755Packet Received =3725Loss =30

MIN Time =1msMAX Time =1603msAverage Time =14ms

RESULTS (8/9)RESULTS (8/9)Ping test around 800-1165mPing test around 800-1165m

Manage to extend the rangeAchieved about 1156 to 1165 meterStable on the startingShows some delay while movingTime Out status


Four types of Cantenna have successfully been design and tested.The Cantenna performance met the objective of extending the coverage up to 1 km and boosting the data rates.Cantenna 2 outperformed other antennas followed by Cantenna 1.

CONCLUSIONCONCLUSION

Extending the range and the performance of the CANTENNA.

Better material for body, connectors and pigtail cables

Auto scan function included.

FUTURE WORKFUTURE WORK

THANK YOU

THE END

Final Presentation edited by Dr MBI

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