Antenna Design - Review

1
(No Transcript)
2
(No Transcript)
3
Antenna Design - Review

• In antenna design, an important design parameter
  is the wavelength of the EM wave
• Wavelength is a function of frequency
• Antenna length is typically either
• 1 wavelength
• ¼ wavelength
• ½ wavelength

4
Frequency vs wavelength
¼ wavelength
Wavelength
5
Wavelength Calculations

• Wavelength units
• l (wavelength) m/cycle
• f (frequency) cycles/sec hertz
• c (speed of light) m/sec 3.0 x 108 m/sec
• Wavelength equation
• l c / f
• m/cycle (m/sec) / (cycles/sec)

6
Sample calculation

• Find the wavelength of a frequency of 850 MHz
• Convert 850 MHz to Hz
• 850 MHz 850 x 106 Hz 8.50 x 108 Hz
• Use wavelength equation
• l c/f where c speed of light 3.0 x 108
  m/sec
• l (3.0 x 108 m/sec ) / (8.50 x 108 cycles/sec)
• l .353 m/cycle
• Convert to cm gives
• l 35.3 cm/cycle
• For a ¼ wavelength antenna (35.3cm/cycle)/48.82
  5cm/cycle

7
(No Transcript)
8
Design Criteria

• Maximum size 20mm x 20mm
• Minimum size 5mm x 5mm
• No sharp corners
• Length must equal wavelength of chosen
  application
• Must have a picture frame around the design to
  allow for cutting into individual antenna
• No offensive or controversial designs
• Keep it simple but original

9
Simple spiral design
10
Cingular Logo design
11
XBOX design Note-DO NOT USE WHITE ON
BLACBACKGROUND

• The linear length dimension

12
UNCC Design
13
UNC-Charlotte Crown design
14
Football Design- DO NOT USE WHITE ON DARK
BACKGROUND
15
Batman design
Top Section (enlarged)
Full Dimension Drawing
16
Dilbert Antenna design way too complex but cool
Final design is 122.5 mm long
17
The Dilbert Antenna Design
18
UNCC 49er Pick Overall frame size 10.0mm x 8.00 mm
19
Clover Design
20
Antenna Design to Mask Formation
Total length 62.5mm
Arrayed design printed on special transparency
paper
21
The goal of the dimension drawing is to create a
mask

• Your mask will be used to create your design on
  your wafer
• It will be printed full size and repeated in rows
  and columns to fill 100mm wafer
• Your mask will be created on a special
  transparency sheet
• Your design will be black to block light with a
  clear background to allow light to pass
• It is a low cost alternative to expensive glass
  masks

22
Assignment due next class

• One per team
• Dimension drawing for your teams antenna design
• Overall length must match your antenna design
  length
• All corners to be rounded
• Must Not be on Black background
• Dimensions must be in a contrasting color
• Keep it simple
• Preview design before submission
• Must have a dimensioned frame arounf the design
• AutoCAD available on MOSAIC under Mechanical
  Engineering Autodesk
• AutoCAD tutorial on the Engr 1202 ECE web site
• TA available to help