Hello "The Other Brian", Pre-Amp: We've used a Mini-Circuits ZKL-2+<http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwij3dnl6sXLAhVR4WMKHXL7C-QQFggcMAA&url=http%3A%2F%2Fwww.minicircuits.com%2Fpdfs%2FZKL-2.pdf&usg=AFQjCNGl3FSSj1X6SvEJWfHXfTBrKpNp8A> Medium Power Amplifier(Gain 33.5 dB typ., low noise 4 dBm typ.) with a log periodic antenna in our Space Saver Anechoic for a number of years with good success. The amplifier is installed in a metal bud box with a Plug-Plug "N" connector<http://www.mouser.com/ProductDetail/Cinch-Connectivity-Solutions/ADT-2694-MF-NNN-02/?qs=kRS0rR9cfpWwV6ysPrE6lw%3d%3d>, good to 18GHz, on one end (for Antenna) of the box and a Jack-Jack "N" connector<http://www.digikey.com/product-detail/en/amphenol-rf-division/172124/ACX1170-ND/1011847>, good to 11GHz, (for cable to Analyzer) on the other side. There are two female SMA panel mount connectors on the female "N" connector end of the box. One SMA is the sense while the other SMA is for the DC supply.
Bias-Tee: As for bringing power into the chamber, or screen room, on the main cable. I'm doing that for near field measurements in an RF screen room and it has helped with reducing background noise by at least 5 dB between 1GHz-7GHz. We use two Picosecond Model 5547 Bias Tees<http://www.tek.com/datasheet/bias-tees/pspl5547-datasheet>, 5kHz-15GHz, for bringing in 12vdc for a couple of Mini-Circuits ZX60-6013E-S+<http://www.minicircuits.com/pdfs/ZX60-6013E+.pdf>. The ZX60's have a frequency range of 20MHz to 6GHz, gain from 16.2-12.1 dB over the same frequency range, low noise figure 3.3 dB typ. By keeping the unshielded wire sections for the DC power to a minimum, or no unshielded sections at all, will help. Update: I see that Tektronix purchased Picosecond in 2014, didn't know that. Images of the "Pre-Amp" box can be emailed if you like. I believe the Bias-Tee method was recommended by Ed Price a number of years ago when I asked about a solution. By the way, thank you Ed. Best Regards, Bob Bob Casiano | 208-863-1439 | bcasi...@micron.com<mailto:bcasi...@micron.com> / bcasi...@gmail.com<mailto:bcasi...@gmail.com> | Micron Technology, Inc. Engineer - EMC/IO Desk: 208-368-4892 Cell: 208-863-1439 QRA Engineering Labs - EMC/IO Group EMC/EMI testing/certification and IOCAP characterization Boise, Idaho From: Kunde, Brian [mailto:brian_ku...@lecotc.com] Sent: Wednesday, March 16, 2016 11:17 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Pre-Amp mounted to antenna We have a Biconlog. We currently have a 22dB pre-amp which is fine for class A levels but a close to 10dB+ above the noise floor near 1Ghz for class B. Moving the amp to the antenna should gain us several dB due to cable loss. We are also considering upgrading to a 40dB pre-amp. Any issues with doing that? In my original email I mentioned the desire of powering the pre-amp through the coax. Any issues with powering the pre-amp with a second dedicated coax just to supply dc power from a linear power supply? Thanks for the input. The Other Brian From: Grasso, Charles [mailto:charles.gra...@echostar.com] Sent: Wednesday, March 16, 2016 12:47 PM To: Kunde, Brian; EMC-PSTC@LISTSERV.IEEE.ORG<mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: RE: Pre-Amp mounted to antenna What antenna are you using? The gain you are seeking seems a little low.. Best Regards Charles Grasso Compliance Engineer Echostar Communications (w) 303-706-5467 (c) 303-204-2974 (t) 3032042...@vtext.com<mailto:3032042...@vtext.com> (e) charles.gra...@echostar.com<mailto:charles.gra...@echostar.com> (e2) chasgra...@gmail.com<mailto:chasgra...@gmail.com> From: Kunde, Brian [mailto:brian_ku...@lecotc.com] Sent: Tuesday, March 15, 2016 11:27 AM To: EMC-PSTC@LISTSERV.IEEE.ORG<mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: [PSES] Pre-Amp mounted to antenna Greetings. I'm looking for a low noise Pre-Amp for Radiated Emissions 30Mhz to 1Ghz (or higher) with a gain of 20-30dB; but here's the catch. I want it to mount directly to the "N" connector on my BiLog Antenna and be powered by a downstream Power Supply box that sends DC down the coax. Just like how TV Antenna pre-amps work. Does anyone know of a turn-key over the counter product like this that is available? I know such a design can have great benefits and be plagued with troubles such as reflections so I know it has to be done right and done well. Any information would be most helpful. Thanks in advance. The Other Brian ________________________________ LECO Corporation Notice: This communication may contain confidential information intended for the named recipient(s) only. If you received this by mistake, please destroy it and notify us of the error. 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To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
