EMC Consulting Inc.

Presentations and Publications:

“High Frequency calibration of the 41 inch (1.04m) receiving monopole with and without counterpoises and with different sources”

“Antenna to antenna coupling on an Aircraft Using a 1/10th Scale Model with Results Compared to the FEKO Electromagnetic Analysis Program”

Both to be presented at the EMC Europe Wroclaw 2010 Symposium 13th -17th September 2010

“Common myths, fallacies and misconceptions in electromagnetic Compatibility and their correction” Electronic Design magazine May/June 2010

“Egregious Errors in Electromagnetic Radiation Evaluation” ITEM magazine May 2010

EMI/EMC Prediction/Analysis!

Antenna to antenna analysis using a 1/10th scale model aircraft.

Analysis includes:

Antenna to antenna coupling , and isolation due to shading

PIM

EMI mitigation techniques, including filters, absorber, RF switches etc.

Types of interference considered:

	IF interference, where the transmitter is at the receiver IF frequency.
	Harmonic interference, where a harmonic of the transmitter is at the intended receive frequency.
	Cross modulation interference, where a high level transmission close to the receiver frequency is not sufficiently attenuated by the receiver input filter (if any). Here compression, intermodulation and spurious responses can occur in the receiver as well as potential damage.
	Adjacent channel interference from a transmitter close enough to lie within either the receiver IF bandwidth or the receiver bandwidth.
	Broadband noise from a transmitter which is in band for a receiver.

Available on site, or remotely via internet, see our EMI/EMC Prediction/Analysis page for more details.

An EMC/EMI book with practical applications!

The second updated and expanded edition of “Electromagnetic Compatibility: Principles and Applications”, Author: D. Weston, Publisher: Marcel Dekker. Containing updated data on EMI diagnostic/verification measurements, as well as over 900 drawings, tables and equations – 500 more than the previous edition! Approximately 63% more content including a new chapter on “good” PCB layout techniques. Review

Reports

New Report!
Calibration of the 41 inch (1.04m) receiving monopole. (.pdf)

New Report on PCB Radiation!
This investigation was started in 2001 and is still ongoing. However, some conclusions can be made based on the measurements to date and so we have provided a draft version of the report. PCB. Electromagnetic radiation due to high speed logic from different layouts. (First Draft) (.pdf)

New Report!
Susceptibility of Electric Matches/ Electrical Igniters to ESD, Lightning and Electromagnetic Fields. (.pdf)

Conduit measured transfer impedance and shielding effectiveness (.pdf)

Shielding a room using aluminum foil. (.pdf)

Seams as the weak link in E-field and plane wave shielding effectiveness. (.pdf)

An explanation for the “magic” low frequency magnetic field shielding effectiveness of thin conductive foil with a relative permeability of 1 (.pdf)

Shielding effectiveness of a suit made from conductive copper cloth. (.pdf)

150Hz to 1MHz magnetic field coupling to a typical shielded cable above a ground plane configuration. (.pdf)

Radiated emissions, predicted and measured, from a voltage source in a 0.15m section of wire, (simulating a common mode voltage in a PCB ground) and the effect of an attached wire. (.pdf)

Transfer impedance of a shielded cable with the shield made from Ni/Ag or Cu/Ni plated cloth tape. (.pdf)

Comparative magnetic field Shielding Effectiveness of thin conductive coatings. (.pdf)

Can MIL-STD EMI requirements be met with conductively coated plastic enclosures? (.pdf)

Predicting radiated emissions from cables in the RE02/RE102/DO-160/SAE J113-41 test set up, using measured current in NEC and simple TX equations. (.pdf)

Transfer Impedance and shielding effectiveness of a Belden 8669 overbraid shielded cable compared to RG58 and RG214 from 0.25MHz to 12GHz. (.pdf)