I have used a short length of rigid coax, stripped to expose about 1/8" of inner conductor at the tip, as a nice near E-field probe for 14 GHz. The same probe also works well for finding hot traces on a PCB or just nosing around in a cluster of spaghetti wiring. I have the two HP passive near field probes, and an EMCO probe set (with the little pre-amp), but most jobs are handled either by the one larger EMCO loop, or a small, unshielded loop that I made >from 3 turns of magnet wire wrapped around my little finger. (I'm lucky to have a metric standard finger, 2 cm or, in the old system, one eyegouge in width.)
When I'm hunting down a leak, I'm usually not too particular about whether I'm using an E-field or an H-field probe. I'll try both, and whatever works is what works. Ed Price [email protected] WB6WSN NARTE Certified EMC Engineer Electromagnetic Compatibility Lab Cubic Defense Applications San Diego, CA USA 858-505-2780 Military & Avionics EMC Is Our Specialty > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf > Of John McAuley > Sent: Thursday, March 12, 2009 3:01 AM > To: [email protected] > Subject: RE: Near Field RF Probe Set > > In my experience the EMCO near field probe set and in > particular the larger loop is the most useful. I have tried > the E field probes and inevitably finish up using the loop, > sometimes with a pre amp. > > You can make to loop very easily using a piece of coax! > > Above 6 GHz I guess a horn be best as you can get gain from it. > > > > My company is looking to buy a RF probe set for test bench > evaluation > > for radiated emission. Can someone give a good recommendation? > > > > PS: I checked the Rohde & Schwarz model - the magnetic > loops are too > > thick and the price too high. Thanks, Wendy Nya > > I am also looking into near field probes and am curious if > anyone has experience with Beehive. > > http://beehive-electronics.com/ > > These appear reasonably priced and I found a reference to > them in an Agilent slide presentation. > > Also, are any near field probes useful to any great degree > above 6 GHz? > > Peter Tarver > [email protected] > - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
