Develop DualBand CPW Asymmetric Monopole Antennas on the Aluminum Oxide Substrates

1
Develop Dual-Band CPW Asymmetric Monopole
Antennas on the Aluminum Oxide Substrates
Reporter Shih-Sian Zeng Adviser
Chien-Min Cheng
Southern Taiwan University
Department of Electronic Engineering
2
Outlines
Introduction
Paper Review
Purpose
Substrates and Antenna Design
Results and Discussion
Conclusions
Southern Taiwan University
Department of Electronic Engineering
3
Introduction
Paper Review
W.-C. Liu and C.-F. Hsu ?Dual-band CPW-fed
Y-shaped monopole antenna for PCS/WLAN
application? ELECTRONICS LETTERS 31st March 2005
Vol. 41 No. 7
Southern Taiwan University
Department of Electronic Engineering
4
Introduction
Purpose
Asymmetric structure to reduce antenna
Size by half
High dielectric constant subatrate
Improving high-frequency stability
CPW-fed is adopted this antenna
Easily with other integrated circuits
Southern Taiwan University
Department of Electronic Engineering
5
Outlines
Introduction
Substrates and Antenna Design
Substrates Selection
Design Process
Antenna Geometric
Results and Discussion
Conclusions
Southern Taiwan University
Department of Electronic Engineering
Department of Electronic Engineering
6
Materials and Antenna Design
Material Selection
Silver Paste
Al2O3 Substrate
substrate
Southern Taiwan University
Department of Electronic Engineering
7
Materials and Antenna Design
Design Process
Fired in an Oven (750ºC/30min)
Selection (Band)
Antenna Design (HFSS Simulator)
Connect (SMA)
Screen-Printed (Mask , Ag/Pd )
Network Analyzer (Frequency)
Radiation Patterns (E-plane , H-plane , Gains)
Southern Taiwan University
Department of Electronic Engineering
8
Materials and Antenna Design
Antenna Geometric
CPW-fed Monopole Structure parameter (unit mm)
Southern Taiwan University
Department of Electronic Engineering
9
Outlines
Introduction
Substrates and Antenna Design
Results and Discussion
Simulated S11 Results due to the Variation of L1
Simulated and Measured S11 Results
Measured Radiation Patterns
Measured Peak Gains
Conclusions
Southern Taiwan University
Department of Electronic Engineering
10
Results and Discussion
Simulated S11 Results due to the Variation of L1
S11 (dB)
L1
Frequency (GHz)
Southern Taiwan University
Department of Electronic Engineering
11
Results and Discussion
Simulated and Measured S11 Results
S11 (dB)
Frequency (GHz)
Southern Taiwan University
Department of Electronic Engineering
12
Results and Discussion
Measured Radiation Patterns
2.4GHz
5.2GHz
Southern Taiwan University
Department of Electronic Engineering
13
Results and Discussion
Measured Peak Gains
3.48 dBi
0.2 dBi
(a) 2.32.5 GHz
(b) 5.15.9 GHz
Southern Taiwan University
Department of Electronic Engineering
14
Outlines
Introduction
Substrates and Antenna Design
Results and Discussion
Conclusions
Southern Taiwan University
Department of Electronic Engineering
15
Conclusions
Minimized (2010.81 mm3) - CPW-fed asymmetric
monopole structures - High dielectric constant of
the ceramic substrates
Dual-band operation (2.4/5.2 GHz WLAN band)
Measured S11 are ?21.4 dB (at 2.45 GHz) and ?19.1
dB (at 5.4 GHz)
Near omni-directional radiation patterns
Measured peak gains are 0.2 dBi (at 2.45 GHz) and
3.48 dBi (at 5.4 GHz)
Southern Taiwan University
Department of Electronic Engineering
16
Q A
Thanks for your attention
Southern Taiwan University
Department of Electronic Engineering