Antenna design and mask creation for the clean room project

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Audrey Gaines
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1 Antenna design and mask creation for the clean room project

4 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 can be either 1. 1 wavelength 2. ¼ wavelength

5 Frequency vs wavelength ¼ wavelength Wavelength

6 Wavelength Calculations Wavelength units: l (wavelength) m/cycle f (frequency) cycles/sec = hertz c (speed of light) m/sec = 3.0 x 10 8 m/sec Wavelength equation l = c / f m/cycle = (m/sec) / (cycles/sec)

7 Sample calculation Find the wavelength of a frequency of 850 MHz 1. Convert 850 MHz to Hz 850 MHz = 850 x 10 6 Hz = 8.50 x 10 8 Hz 2. Use wavelength equation l= c/f where c = speed of light = 3.0 x 10 8 m/sec 3. l = (3.0 x 10 8 m/sec ) / (8.50 x 10 8 cycles/sec) 4. l =.353 m/cycle Convert to cm gives 5. l = 35.3 cm/cycle 6. For a ¼ wavelength antenna = (35.3cm/cycle)/4=8.825cm/cycle

9 Design Criteria for our planar antenna Maximum size 20mm x 20mm Minimum size 10mm x 10mm Can be rectangular does not have to be square Lines need to be about 0.5 mm thick No sharp corners Length must equal wavelength (or ¼ wavelength) of chosen application Must be one continuous line that does not cross over itself Must have a picture frame with dimensions around the design to allow for cutting into individual antenna No offensive, controversial, sexual, religious, gang sign, etc. designs Keep it simple but original

10 To create your antenna design (Use TA help and AutoCAD instructions) 1. Develop a hand drawn sketch of your design 2. Using the antenna length for your application and AutoCAD create an original design that is the proper length 3. Minimize wasted space with your design 4. Create a dimension drawing of your design with the dimensions shown in a contrasting color and a dimensioned box around your design 5. Submit for check and review (homework assignment)

11 Examples of dimension drawings Be sure the background is white, not black Use a contrasting color for the dimensions Make sure your total antenna length matches your application Include a box around your design with dimensions

12 UNCC Design does not have to be square can be rectangular provided no side is larger than 20mm

13 XBOX design Note-DO NOT USE WHITE ON BLACBACKGROUND

14 Batarang a bit complex simpler is better

15 Simpler design but wasted space

16 Clover Design

17 Dilbert Dimension Drawing Way too complex but cool Final design is mm long

18 The Dilbert Antenna Design

19 Some previous designs Some of these designs did not follow the design criteria

20 Four leaf clover and Martini Glass

21 Fish and Snowman

22 Pontiac Panther and Transformers Septicon

23 Spider and Punisher

24 The goal of the dimension drawing is to create a mask Your mask will be used to recreate your design on your wafer It will be printed full size and repeated in rows and columns to fill a 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 which can cost $500 or more each

25 Antenna Design to Mask Formation Duck Head Design Number of good antenna per wafer = 13 Arrayed design printed on special transparency paper

26 Antenna Design to Mask Formation Tree Design Number of good antenna per wafer = 49 Arrayed design printed on special transparency paper

27 Antenna Design to Mask Formation Triangle Design Number of good antenna per wafer = 21 Arrayed design printed on special transparency paper

28 Satellite Dish Antenna Mask Approximately 70 complete antenna per wafer

29 Air Force Logo Antenna mask 16 complete antenna per wafer

30 Death Star Antenna Mask Approximately 42 complete antenna per wafer

31 Antenna Symbol Antenna Mask Approximately 42 complete antenna per wafer

32 UNCC Antenna Mask Approximately 36 complete antenna per wafer

33 Dodge Charger Mask Approximately 84 complete antenna per wafer

34 UNCC Crown Antenna Mask Approximately 20 complete antenna per wafer

35 Simple Spiral Antenna Design Approximately 105 complete antenna per wafer

36 Mask Tradeoffs For antennas, size counts, larger is a better antenna For lower cost, smaller is better more antenna per wafer gets unit cost lower For higher quality use a full length wavelength design For lower cost use a ¼ wavelength design

Assignment One per team required additional designs are allowed Dimension drawing for your team s antenna design Overall length must match your antenna design length All corners to be rounded Must

37 Assignment One per team required additional designs are allowed Dimension drawing for your team s antenna design Overall length must match your antenna design length All corners to be rounded Must Not print on Black background Dimensions must be in a contrasting color Keep it simple Preview design before submission Must have a dimensioned frame (box) around the design. This is necessary as a cutting guide for slicing the wafer into individual antenna. Length and width of frame must be specified. AutoCAD available on MOSAIC under Mechanical Engineering Autodesk AutoCAD tutorial on the Engr 1202 ECE web site TA will work with each team to create their design

Engr 1202 ECE. Clean Room Project

Engr 1202 ECE. Clean Room Project Engr 1202 ECE Clean Room Project Dilbert the engineer gets special recognition September 2005 2014 Version does not even have my name! AC vs. DC Circuits DC and AC devices in everyday life DC Devices