Reconfigurable Low Profile Antenna James Soon Advisor: Dr. Prasad Shastry Topics        Introduction Inputs/Outputs Modes of Operation Methods Diagrams Equipment List Schedule  Why reconfigurable antennas?    Cost   Cost Reliability One is cheaper than two Reliability  Two are better than one  Diversity     Time Space Frequency Polarization  Project.

Transcript Reconfigurable Low Profile Antenna James Soon Advisor: Dr. Prasad Shastry Topics        Introduction Inputs/Outputs Modes of Operation Methods Diagrams Equipment List Schedule  Why reconfigurable antennas?    Cost   Cost Reliability One is cheaper than two Reliability  Two are better than one  Diversity     Time Space Frequency Polarization  Project.

Reconfigurable Low Profile
Antenna
James Soon
Advisor: Dr. Prasad Shastry
Topics
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Introduction
Inputs/Outputs
Modes of Operation
Methods
Diagrams
Equipment List
Schedule
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Why reconfigurable antennas?
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Cost
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Cost
Reliability
One is cheaper than two
Reliability
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Two are better than one
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Diversity
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Time
Space
Frequency
Polarization
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Project objectives
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Design
Simulation
Manufacture
Analysis
PIN Diode
Input/Output
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Single port frequency diverse device
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Horizontal
Polarization
Input/Output
Vertical
Polarization
Input/Output
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Dual port polarization diverse device
Modes of Operation
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Transmit mode
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Applied rf signal converted to radiated signal
Receive mode
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Radiated signal converted to received rf signal
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Microstrip construction
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Microstrip antennas
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Coplanar waveguide construction
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Radiation characteristics
Research
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Several antenna research articles
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SUNG, Y.J., JANG, T.U., KIM, Y.S., ‘A
Reconfigurable Antenna for Switchable
Polarization, IEEE Microwave and Wireless
Letters, Volume 14, Number 11,
November 2004, pp. 534 - 536.
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Antenna with switchable polarization
Diode 1
Diode 2
Diode 3
Diode 4
Polarization
Ant 1
ON
ON
ON
ON
Linear
Ant 2
Off
Off
Off
Off
Linear
Ant 3
ON
Off
ON
Off
LHCP
Ant 4
Off
ON
Off
ON
RHCP
Undetermined Design Characteristics
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Antenna construction
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Antenna feed structure
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Coplanar
Microstrip
Microstrip line
Probe
Diode biasing
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Independent
Single point
Data sheet
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Gain > 5dBi
Frequency Range: 1.5 – 1.6 GHz range
Return Loss < -15 dB
Radiation pattern
Polarization: Linear, RHCP, LHCP
Bandwidth: approx. 2%
VSWR 2.0:1
Methods
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CAD tools - SONNET, PCAAD, ADS,
Momentum
Microwave Integrated Circuit Fab Lab
Network Analyzer, Aneochoic Chamber
Labview, VEE Pro
Equipment List
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PIN diodes
Varactor diodes
Fabrication lab
Anechoic chamber
Schedule
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RF Labs
Jan 1
Get Married
Jan 8
Honeymoon
Jan 22 - 30
Preliminary Design
Feb 26
Fabrication
Mar 19
Analysis
Apr 9
Presentation & Final Report
May 3
Questions?

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