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Focal Point

17 Threads found on edaboard.com: Focal Point

Obtaining a horn feed parabolic reflector far field propagation pattern

I have a horn antenna working at 144GHz with A=12mm and B=14mm. Then I'll illuminate a satellite dish of 57cm diameter with this antenna, with the feed located at the focal point of the parabola. I have the radiation pattern of the horn, made with MATLAB. The goal is to know the beam propagation (power radiation) pattern of the parabola in the far

calculating the focal point of parabolic reflector antenna

hi can any body help me to calculate focal point of a parabolic reflector antenna?i dont have f/d ratio ! i need a parabolic reflector at 5.6GHz with the gain of about 27dB

mlx90614+germanium lens

the lens is made of Germanium with inner diameter of 37.5 cm and outer diameter of 31.19 cm You really mean cm? Is it mm? Apart of this point, it would be interesting to know the lenses focal length and the geometry of your setup. To give a general answer not depending on detail informaton: The sensor calibration is assuming no o

conformal antenna design problem

Can you add a virtual focal point in the design as a fiducial point for reference?

Laser diode and Integration rod

I have a question if anybody can help me with I use a laser diode together with an integration rod to make the light intensity more uniform. Should the beam of the laser diode be converging to or diverging away from the focal point at the input of the integration rod? Is there a difference between the two? Thanks

Datasheet for a FT5302

Hello All, Im looking to find some in depth technical information maybe a datasheet for the FT 5302 capacitive touch panel controller IC's. Im having a hard time and if anyone can point me in the right direction that would be faboulus. they are by focal Tech Thanks, Zay

FDTD CODE for lens focusing

Hi, I am just wondering how I can observe the optical property in the focal region using the FDTD method because I don't know what's the focusing plane in the calculating area. If a point source is a stimulus, what's the code for this case? I saw a plane wave is always used for the simulation. Thanks!

PARABOLIC LISTNING DEVICE

What frequency ? 10Hz, 10KHz, 10MHz, 10GHz ?? A parabolic dish is just that, a parabola. You put the 'listening' device, microphone or antenna at its focal point. The rest is just an amplifier. Brian.

Turn C/Ku Band TX/RX Antenna into X Band Antenna

Yes, you can use the C/Ku dish antenna for S-band, just replacing the feedhorn, and keep the same focal point.

Parabolic antenna - reflection lost

You have basigally lost the focal point of the dish, either because the dish is bended or because the focal point is misalligned. see the next articles to help you determine it again. Also check polarizat

software for design a profile paraboloid curve

You dont need software to create parablic curve on surface. You will need a string that will not stretch, marking tool, straight stick, 90?ruler , few screws. Blue line on diagram is your string fixed at focal point F and corner of 90?ruler, Q point. L is your straight stick fixed firmly on the surface. Marker is inserted in P (...)

parabolic reflector antenna

Fisrt you must selecta frequency (6/4GHz) Then you must design the parabolic reflector using equation and then you must find the focal point of that dish And finaly the feeder antenna followed by the transeiver must fixed to focal point of the dish. That is the basic construction of the parabolic reflector antenna You (...)

How to find focal point in CST?

ok suced assume u have horn as feeder,ok as u make offset reflector,u ask about where i could set the feeder.that is ur question? if yes it so easy,in cst after u simulate the feeder alone,in farfield pattern calculation ,choose phase center in its option u will see the location from the feeder port where u should locate the feeder above the fo

how to find the focal point of a parabolic dish?preamp circ.

Aren't depth and diameter of the dish enough for getting the focal distance? EDIT: like this

Variable focal length as a solution of eye strain

Hi, The starin is not only that the focal length is fixed . But it is also that it is within the minimal limit say 30cm for an average man. Secondly the Gamma or brightness of the monitor is an issue. If it matches with the ambience light then there is a strain in the eye because of foreground mixing with background. IT SHOULD BE SLIGHTLY GREAT

Program for calculating parabolic dishes

Hi, is there a very simple program or calculation model for parabolic dishes? Basically to calculate the curvature/focal point and so on... I would appreciate any comments you guys might have... THANKS!!!

26th Idea [Friis law]

About the 1/d^2 law, let think in optics. The power density (measured in W/m^2) decreases as 1/d^2 along a beam, where d is measured from the focal point (a point from which the beams adjacent to the current beam seem to come from). But the total power picked by your receiving antenna is the integral of that power density over its (...)

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