Frequency Reconfigurable Microstrip Patch Antenna
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Frequency Reconfigurable Microstrip Patch Antenna Antenna and Microwave Laboratory (AML) Student: Rafid N. Damman Professor: Dr. Satish K. Sharma Graduate Student Mentor: Jennifer Taylor Project Goals •Microstrip patch antenna that can be reconfigured to operate at two frequencies:1.8GHz and 2.4GHz •Find the best parameters for the antenna to achieve the best gain, matching, and acceptable radiation pattern. •Utilized PIN Diode RF switches to make the antenna reconfigurable •Ansoft/AnSys HFSS software used to model the RF switches and patch antenna. Approach •Upon knowing the thickness and the dielectric constant of the substrate material I can calculate the width and length of my rectangular patch using the equations given in the Antenna Theory and Design textbook by Balanis. •I run many simulations to find the exact configurations for the two different lengths to have a resonant frequency of 1.8GHz and 2.4GHz and the best matching levels. •Finally, I will include five PIN 2D Radiation Pattern: 1.8GHz 2D Radiation Pattern: 2.4GHz S11 1.50 1.75 2.00 2.25 2.50 Freq [G Hz] -20.00 -17.50 -15.00 -12.50 -10.00 -7.50 -5.00 -2.50 0.00 Y1 AnsoftLLC HFSSDesign 1.8 2.4 Ideal(ON) S 11 Frequency R econfigurable M icrostrip Patch Antenna ANSOFT m1 m2 m4 m5 m6 m3 Curve Info dB(S(2,2)) Setup1 :Sw eep1 dB(S(2,2))_1 Imported Nam e X Y m1 1.7999 -19.7207 m2 1.7434 -9.9263 m3 1.8536 -10.1796 m4 2.4000 -16.2450 m5 2.3622 -9.9737 m6 2.4277 -9.7291 All Switches ON All Switches OFF Conclusion •The reconfigurable microstrip patch antenna was designed with two different frequencies to operate from 1.75GHz to 1.85GHz and 2.36GHz to 2.42GHz depending on the ON or OFF state of the five switches. •These two bands are used in many wireless communication applications including cell 3D Radiation Pattern: 2.4GHz 3D Radiation Pattern: 1.8GHz Antenna Geometry Key Substrate thickness: 0.8mm Substrate Dielectric Constant: 4.4 PIN Diode: -54.00 -38.00 -22.00 -6.00 90 60 30 0 -30 -60 -90 -120 -150 -180 150 120 AnsoftLLC H FS SD esign 1.8 G hz Final(SM A B etterP osition) R adiation Pattern 1.8G hz ANSOFT m1 m2 Curve Info dB(RealizedGainPhi) Setup1 :Sw eep1 Freq='1.8GHz' Phi='0deg' dB(RealizedGainPhi) Setup1 :Sw eep1 Freq='1.8GHz' Phi='90deg' dB(RealizedGainTheta) Setup1 :Sw eep1 Freq='1.8GHz' Phi='0deg' dB(RealizedGainTheta) Setup1 :Sw eep1 Freq='1.8GHz' Phi='90deg' Name Theta A ng M ag m1 0.0000 0.0000 2.0282 m2 90.0000 90.0000 -33.6144 -54.00 -38.00 -22.00 -6.00 90 60 30 0 -30 -60 -90 -120 -150 -180 150 120 AnsoftLLC HFSSDesign 1.8 2.4 Ideal(O FF)EXPERIM ENT R adiation Pattern 2.4G hz ANSOFT m1 m2 Curve Info dB(RealizedGainPhi) Setup1 :Sw eep1 Freq='2.4GHz' Phi='0deg' dB(RealizedGainPhi) Setup1 :Sw eep1 Freq='2.4GHz' Phi='90deg' dB(RealizedGainTheta) Setup1 :Sw eep1 Freq='2.4GHz' Phi='0deg' dB(RealizedGainTheta) Setup1 :Sw eep1 Freq='2.4GHz' Phi='90deg' Nam e Theta A ng M ag m1 0.0000 0.0000 3.5342 m2 90.0000 90.0000 -21.7073 Research Supported by: NSF CAREER Grant # ECCS-0845822
description
Frequency Reconfigurable Microstrip Patch Antenna. Research Supported by: NSF CAREER Grant # ECCS-0845822. Antenna and Microwave Laboratory (AML) Student: Rafid N. Damman Professor: Dr. Satish K. Sharma Graduate Student Mentor: Jennifer Taylor. Project Goals - PowerPoint PPT Presentation
Transcript of Frequency Reconfigurable Microstrip Patch Antenna
Frequency Reconfigurable Microstrip Patch AntennaAntenna and Microwave Laboratory (AML)
Student: Rafid N. Damman Professor: Dr. Satish K. Sharma
Graduate Student Mentor: Jennifer TaylorProject Goals
•Microstrip patch antenna that can be reconfigured to operate at two frequencies:1.8GHz and 2.4GHz•Find the best parameters for the antenna to achieve the best gain, matching, and acceptable radiation pattern.•Utilized PIN Diode RF switches to make the antenna reconfigurable•Ansoft/AnSys HFSS software used to model the RF switches and patch antenna.
Approach
•Upon knowing the thickness and the dielectric constant of the substrate material I can calculate the width and length of my rectangular patch using the equations given in the Antenna Theory and Design textbook by Balanis.•I run many simulations to find the exact configurations for the two different lengths to have a resonant frequency of 1.8GHz and 2.4GHz and the best matching levels. •Finally, I will include five PIN Diode switches to be able to add the specified length to the antenna so that the single antenna can operate at the two different frequencies.
2D Radiation Pattern: 1.8GHz
2D Radiation Pattern: 2.4GHz
S11
1.50 1.75 2.00 2.25 2.50Freq [GHz]
-20.00
-17.50
-15.00
-12.50
-10.00
-7.50
-5.00
-2.50
0.00
Y1
Ansoft LLC HFSSDesign 1.8 2.4 Ideal (ON)S11 Frequency Reconfigurable Microstrip Patch Antenna ANSOFT
m1
m2
m4
m5 m6m3
Curve Info
dB(S(2,2))Setup1 : Sw eep1
dB(S(2,2))_1Imported
Name X Y
m1 1.7999 -19.7207
m2 1.7434 -9.9263
m3 1.8536 -10.1796
m4 2.4000 -16.2450
m5 2.3622 -9.9737
m6 2.4277 -9.7291
All Switches ON
All Switches OFF
Conclusion
•The reconfigurable microstrip patch antenna was designed with two different frequencies to operate from 1.75GHz to 1.85GHz and 2.36GHz to 2.42GHz depending on the ON or OFF state of the five switches. •These two bands are used in many wireless communication applications including cell phone and Bluetooth technologies.
3D Radiation Pattern: 2.4GHz
3D Radiation Pattern: 1.8GHz
Antenna Geometry
KeySubstrate thickness: 0.8mmSubstrate Dielectric Constant: 4.4PIN Diode:
-54.00
-38.00
-22.00
-6.00
90
60
30
0
-30
-60
-90
-120
-150
-180
150
120
Ansoft LLC HFSSDesign 1.8 Ghz Final (SMA Better Position)Radiation Pattern 1.8Ghz ANSOFT
m1
m2
Curve Info
dB(RealizedGainPhi)Setup1 : Sw eep1Freq='1.8GHz' Phi='0deg'
dB(RealizedGainPhi)Setup1 : Sw eep1Freq='1.8GHz' Phi='90deg'
dB(RealizedGainTheta)Setup1 : Sw eep1Freq='1.8GHz' Phi='0deg'
dB(RealizedGainTheta)Setup1 : Sw eep1Freq='1.8GHz' Phi='90deg'
Name Theta Ang Mag
m1 0.0000 0.0000 2.0282
m2 90.0000 90.0000 -33.6144
-54.00
-38.00
-22.00
-6.00
90
60
30
0
-30
-60
-90
-120
-150
-180
150
120
Ansoft LLC HFSSDesign 1.8 2.4 Ideal (OFF) EXPERIMENTRadiation Pattern 2.4Ghz ANSOFT
m1
m2
Curve Info
dB(RealizedGainPhi)Setup1 : Sw eep1Freq='2.4GHz' Phi='0deg'
dB(RealizedGainPhi)Setup1 : Sw eep1Freq='2.4GHz' Phi='90deg'
dB(RealizedGainTheta)Setup1 : Sw eep1Freq='2.4GHz' Phi='0deg'
dB(RealizedGainTheta)Setup1 : Sw eep1Freq='2.4GHz' Phi='90deg'
Name Theta Ang Mag
m1 0.0000 0.0000 3.5342
m2 90.0000 90.0000 -21.7073
Research Supported by: NSF CAREER Grant #
ECCS-0845822
