reconfigurable low profile antenna james soon advisor: dr. prasad shastry
TRANSCRIPT
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Reconfigurable Low Profile Antenna
James Soon
Advisor: Dr. Prasad Shastry
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Topics Introduction Inputs/Outputs Modes of Operation Methods Diagrams Equipment List Schedule
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Why reconfigurable antennas? Cost Reliability
Cost One is cheaper than two
Reliability Two are better than one
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Diversity Time Space Frequency Polarization
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Project objectives Design Simulation Manufacture Analysis
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/2
P I N D io d e
I n p u t/O u tp u t
Single port frequency diverse device
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/2Ho r izo n ta l
P o lar iza tio nI n p u t/O u tp u t
Ver tic a lP o lar iza tio n
I n p u t/O u tp u t
Dual port polarization diverse device
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Modes of Operation
Transmit mode Applied rf signal converted to radiated signal
Receive mode 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
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Research
Several antenna research articles
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
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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
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Undetermined Design Characteristics Antenna construction
Coplanar Microstrip
Antenna feed structure Microstrip line Probe
Diode biasing Independent Single point
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Data sheet
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
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Methods
CAD tools - SONNET, PCAAD, ADS, Momentum
Microwave Integrated Circuit Fab Lab Network Analyzer, Aneochoic Chamber Labview, VEE Pro
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Equipment List
PIN diodes Varactor diodes Fabrication lab Anechoic chamber
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Schedule
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
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Questions?