MICROMECHANICAL RESONATORS AS TUNERS IN WIRELESS DEVICES
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
science projects buddy
Active In SP
**

Posts: 278
Joined: Dec 2010
#1
13-12-2010, 11:00 PM


MICROMECHANICAL RESONATORS AS TUNERS IN WIRELESS DEVICES
RAJKRISHNAN.R
S7B

OVERVIEW
INTRODUCTION TO MEMS
MEMS RESONATORS
ARCHITECTURE
ADVANTAGES AND DISADVANTAGES
FABRICATION
FUTURE SCOPE AND CONCLUSIONS
REFERENCES


.pptx   MICROMECHANICAL RESONATORS AS TUNERS IN WIRELESS DEVICES.pptx (Size: 1.01 MB / Downloads: 46)


1) INTRODUCTION TO MEMS

The technology of very small mechanical devices driven by electricity.
1 to 100 micrometers in size.
Large surface area to volume ratio of MEMS, surface effects dominate volume effects
MEMS could be fabricated using modified semiconductor device fabrication technologies

2) MEMS RESONATOR
Resonators with Q's over 10,000 at GHz frequencies .
Excellent thermal and aging stability
Excited using a combination of AC and DC voltages
Maximum output is obtained at resonance.
Hence used as a filter.

Disk resonator
Bank of resonators
3) ARCHITECTURE A. Replacement of off-chip components
B.An RF channel select architecture
C.An all-mems RF front end architecture

4) ADVANTAGES AND DISADVANTAGES

Inherent voltage controlled tunability.
Power savings.
Flexibility in choice of materials.
High Q of order of 10k @ 3 GHz.
More components can be fabricated on to silicon.
Impedance flexibility.
They are very difficult to fix.
A micro machine fabrication facility is very costly to set up.

5) FABRICATION
Two methods depending on thickness
Surface micromachining.
Bulk micromachining.

Method depend on thickness
If t>10µm bulk micromachining.
If t<10µm surface micromachining.


a) Surface micromachining
a) Surface micromachining
LPCVD of a thin silicon nitride layer .
LPCVD phosphosilicate glass is patterned.
LPCVD of polysilicon.
The polysilicon is dry etched.
HF etch removes the spacer layer.

6) FUTURE SCOPE AND CONCLUSIONS
Ceiling temperature to be around 300°C
MEMS-CMOS integration.
Sufficient linearity and power handling capability;


7) REFERENCES
[1] C. T.-C. Nguyen, “Integrated Radio Front Ends…. “ International Symposium on VLSI Technology, Systems and Applications, 2009.
[2] C. T.-C. Nguyen, "MEMS technology for ...,"IEEE Trans. Ultrason. Ferroelect., Freq. Contr., vol. 54, no. 2, pp. 251-270, Feb. 2007.
[3] M. Dillinger, et al., Software Defined Radio. Architectures, Systems, and Functions. New York, NY: Wiley, 2003.
[4] en.wikipediawiki/
Microelectromechanicalsystems. Date 31/7/2010..



Use Search at http://topicideas.net/search.php wisely To Get Information About Project Topic and Seminar ideas with report/source code along pdf and ppt presenaion
Reply

Important Note..!

If you are not satisfied with above reply ,..Please

ASK HERE

So that we will collect data for you and will made reply to the request....OR try below "QUICK REPLY" box to add a reply to this page

Quick Reply
Message
Type your reply to this message here.


Image Verification
Please enter the text contained within the image into the text box below it. This process is used to prevent automated spam bots.
Image Verification
(case insensitive)

Possibly Related Threads...
Thread Author Replies Views Last Post
  WIRELESS MIROSERWER seminar ideas 2 690 09-04-2016, 12:35 PM
Last Post: mkaasees
  wireless electricity transmission ppt jaseelati 0 337 09-02-2015, 02:38 PM
Last Post: jaseelati
  global wireless e-voting ppt jaseelati 0 334 23-01-2015, 04:19 PM
Last Post: jaseelati
  high speed electronics devices ppt jaseelati 0 292 23-01-2015, 02:18 PM
Last Post: jaseelati
  ppt on trends in wireless computing jaseelati 0 277 21-01-2015, 03:23 PM
Last Post: jaseelati
  wireless power theft monitoring system and indication at local substations. jaseelati 0 363 10-01-2015, 03:42 PM
Last Post: jaseelati
  intelligent wireless video camera wikipedia jaseelati 0 416 07-01-2015, 04:48 PM
Last Post: jaseelati
  high speed electronics devices ppt jaseelati 0 274 07-01-2015, 02:31 PM
Last Post: jaseelati
  automatic wireless health monitoring system in hospitals for patients pdf jaseelati 0 329 06-01-2015, 04:35 PM
Last Post: jaseelati
  underwater wireless communication ppt download jaseelati 0 362 11-12-2014, 04:41 PM
Last Post: jaseelati