Speak to a world-class expert now.
1-800-FOR-KKAI (1-800-367-5524)
info@kkai.com
PrimeTrack® Instant Conferencing
PrimeTrack® Project Management System (patent pending)
CENTER FOR RAPID RESPONSE ENGINEERING® SOLUTIONS
ENGINEERING AND SCIENTIFIC CONSULTING SERVICES
Wide Tuning Range RF-MEMS Varactors Fabricated Using The PolyMUMPs Foundry
Consultant
SKS is a Electrical Engineer, RF / Wireless MEMS Expert, Electronic Circuits and Systems Specialist, Nanotechnology Consultant with world-class expertise in devices and circuits enabled by nanotechnology, circuit design, novel circuits, RF MEMS-based devices, circuits and antennas, photonic & phononic bandgap crystals, and quantum functional devices and circuits.
Speak to this experienced, world-class expert now.
- Call (317) 735-4845
- E-mail sks@rapid-response-consulting.com
For additional or different expertise, browse other top-level expert resumes in Expert Testimony, Failure Analysis, Manufacturing Optimization, KKAI's Center for Rapid Response Engineering® Solutions and a host of other Engineering and Scientific Consulting services.
Learn how KKAI assembles expert teams of any size or skill set combination to meet our clients' needs on a rapid-response basis - no matter how complex the challenge.
Or, peruse our 400 case studies or 500 other expert resumes.
Semiconductor varactor diodes are widely used throughout the electromagnetic spectrum, but their performance limits their applications. One technology being pursued by industry and academia as a potential solution to these problems is RF-MEMS varactors. This article introduces the reader to fundamental device research conducted at McGill University concerning the performance limitations of RF-MEMS varactors fabricated in the commercially available PolyMUMPs (Polysilicon Multi-user MEMS Process) foundry. Several varactors were designed, fabricated and characterized, which demonstrated wide capacitance variations (49 to 433 percent) and high Q-factors (Q = 25 to 90) for devices operating at 2.4 GHz. The issues and procedures presented here are easily applied to the development of other devices being developed for commercial applications.
Semiconductor varactor diodes are commonly used throughout RF, microwave and millimeter-wave spectrums for a variety of applications, including the tuning of critical circuits such as voltage-controlled oscillators (VCO), filters, matching networks and phase-shifters in RFIC and MMIC circuits. However, semiconductor varactor diodes are limited in their applications by performance issues. Fundamentally, the quality factor (Q) for varactor diodes varies inversely to the tunable capacitance range of the diode. The Q suffers from the high series resistance of the varactor diode junction, which results in a decrease in Q when the diode capacitance is increased. Therefore, circuits requiring high Q values, such as high quality VCOs, do not rely solely upon varactors as their only source of capacitance. Varactors are often used in conjunction with off-chip discrete capacitors to maintain a combined minimum capacitance and Q. The addition of off-chip discrete components increases the size, complexity and cost of the circuits, so alternative solutions to this problem have been sought. One technology being investigated as a potential solution to this problem is RF-microelectromechanical system (RFMEMS) variable capacitors (varactors).
For more, please contact this consultant.
Read other articles by this KKAI Associate:
Nanoelectromechanical Quantum Circuits and Systems
| Electrical Engineer, RF / Wireless MEMS Expert, Electronic Circuits and Systems Specialist, Nanotechnology Consultant, devices and circuits enabled by nanotechnology, circuit design, novel circuits, RF MEMS-based devices, circuits and antennas, photonic & phononic bandgap crystals, and quantum functional devices and circuits. | |
| Resume of FRT | electronic circuit design, expert consultant |
| Resume of POL | registered patent agent, intellectual property, expert consultant |
| Resume of XOJ | reliability software, electronic design, expert consultant |
| Resume of EPI | power electronics expert, packaging consultant |
| Resume of RIC | automotive electronics, expert consultant |
To search for specific expertise, enter your search query (type of
expertise you are seeking) in the box below, choose to search the entire
Rapid-Response site or just resumes and brochures, then click the search button.
Please note that the list of resumes available online is a select subset of our
vast database. If your search of our site does not reveal the expertise you are
seeking, please call us toll-free (in the U.S.) at 1-800-367-5524 or
contact us for more information and we will gladly assist you in
locating the specific expertise you require.
Have an urgent litigation support or engineering and scientific consulting need? Contact KKAI now for world-class, expert rapid response.
1-800-FOR-KKAI (1-800-367-5524)
info@kkai.com
BACK TO THE TOP OF THIS PAGE
Kevin Kennedy & Associates, Inc.
Rapid Response Engineering® Solutions
3905 Vincennes Road, Suite 320
Indianapolis, Indiana 46268
(317) 536-7000 voice
(317) 536-7220 fax