Greetings All! [email protected] wrote: > You need to measure 900 Mhz now, and later up to about 2 GHz? You want to > > be able to see 60 dBuV/m to 80 dBuV/m field strength signals. And you want > > to do it with a dipole? Maybe you shouldn't do it with a dipole!
Well, only in the GSM band around 900MHz, and later in the 1.8GHz band as well. It just would have been convenient to re-use a good balun. The reason why I have been thinking about the dipole and not an LP or a horn, is that I do not want to use too directional an antenna, as I will be measuring fields in a room where the RF source is a transmitter located some tens of metres outside. I don't have some source in the room which I could aim a directional antenna at. I am therefore not sure of the angle of arrival of radiation when I'm in the room, and I can't be sure I'm measuring the peak field strength in this situation? I had done a quick calculation of the power I would expect with a typical AF of 28dB at 900MHz for a dipole in the HP11966H set, and at 10mV/m 80dBuV/m I should be looking at around -57dBm into a shielded spectrum analyser. I was planning to use a bandpass filter and preamplifier. Have a pleasant day! Kevin -- ----------------------------------------------------------------------- Kevin Williams, MIEEE Electromagnetic Software and Systems (EMSS) [http://www.emss.co.za] Technopark, Stellenbosch, South Africa email: [email protected] tel/fax: +27 21 880-1880 +27 21 880-1727 ----------------------------------------------------------------------- --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], or [email protected] (the list administrators).
