Recent content by senmeis

For the case with a reflector plane (elevation plane) there’s no radiation behind this plane. Is it true?

As far as I understand all the instruments shall be located on one side of the elevation plane so the radiation on this side is not necessary. Is it correct?

Hi, In the attached slide the elevation angle of a phased array antenna ranges from -25 to +25 degrees. Does it mean EM waves are transmitted on both sides of the elevation plane? Does it make any sense?

I can also find such two speed switches on the market, but I’d prefer my 2-way-2-gang switch because I need a squared switch panel. So does my wiring work at all?

This is my wiring diagram.

Let me formulate the problem clearly. I want to use a 2-way-2-gang switch to control a dual-speed fan motor. The switch has six poles on the back: L11, L1, L12, L21, L2 & L22. The motor has two terminals: High Speed and Low Speed. The idea: switch L1 is for overall On and Off and switch L2 is...

This is a conventional 2-Gang wall switch on the market such as: https://www.amazon.com/Amerisense-Outlet-Screwless-Decorator-Standard/dp/B0BYCM75P7/?tag=pfamazon01-20. Each switch operates separately. When On, current will be delivered through this switch. When Off, , no power is available...

Hi, I want to control a two speed fan motor with a two way light wall switch. The switch has L1 and L2 ports which can deliver power to two separate lights. The motor has two power terminals: speed 1 and speed 2. Of course I mustn’t connect L1 to speed 1 and L2 to speed 2 directly because only...

Hi, I’ve read military EMC standard (such as MIL 461) requires peak detection while consumer standard requiers average detection. Does it mean the peak detection is stricter than the average one?

Hi, On slide 9 of this presentation: http://www.globalcommhost.com/rogers/acs/techsupporthub/en/docs/MWJ_webinar_June20_2017_JC_microstrip_coplanar_stripline_final.pdf it states the signal wavelength can be changed with dielectric constant Dk. As far as I understand the wavelength and the...

Hi, I have seen two versions of definitions of material dissipation factor Df: The first one: Dk (dielectric constant) = K = relative permittivity = ɛ -jɛ’ , ɛ = energy stored and ɛ’ = energy lost. Df (dissipation factor/loss tangent) = ratio of ɛ’ and ɛ The second one: On slide 8 of webinar...

Hi, I’ve read a set of coordinate elements: „roll, pitch and heading“ for aircrafts. What’s the difference to „roll, pitch and yaw“? Senmeis

Page 43 in https://www.datatec.de/media/pdf/65/2f/a6/Keysight_Spektrumanalyse-Basics_AppNote-5952-0292.pdf. I think uncertainty exists in every measurement so this term has a generic sense. As far as I know uncorrelated noise voltage add as RSS because the more noise sources, the greater the...

Please read the documents in Matlab at RMS RSS The section „More About“ has different form of calculation. Which form is the original definition?

Hi, the following statement comes from a document of Keysight spectrum analyzer: The sources of uncertainty can be considered independent variables, so it is likely that some errors will be positive while others will be negative. Therefore, a common practice is to calculate the root sum of...