13 Threads found on edaboard.com: Calculate Antenna Efficiency
How can I do it?
As sketched in previous post. Sweep a signal generator over the intended frequency range, measure input and radiated power, calculate the ratio for each frequency, plot the result.
I have another question...
Several misunderstandings of S-parameters seems to be involved.
- S parameters can be app
Electromagnetic Design and Simulation :: 05-28-2013 17:01 :: FvM :: Replies: 16 :: Views: 1098
I would just need an equation form which I can calculate the aperture efficiency of a circular waveguide antenna. I have data from gain, wavelength and its physical size. The way that is shown in books is:
Effective area (Ae)=(Gain*lambda^2)/(4pi),
Physical dimensions of open end of antenna(Ap)= pi*r^2 (...)
Elementary Electronic Questions :: 06-14-2012 06:41 :: john54 :: Replies: 0 :: Views: 486
As I have the practical value table of AUT gain ,Ref antenna gain, AUT maximum received power ,Ref antenna maximum received power (dB) and cable losses value, I am bit unsure about the theoretical formula to calculate the efficiency using Gain comparison would be highly appreciated if anyone could come forward to sort out my (...)
RF, Microwave, Antennas and Optics :: 05-28-2012 07:56 :: Sriram@measureindia :: Replies: 2 :: Views: 950
when we simulate any printed antenna in simulation software(CST, HFSS) how important it is to assign correct loss property to substrate to calculate accurate gain and efficiency
and how gain is related with the loss tangent or conductivity of material on which antenna is printed
any comments are welcome
Electromagnetic Design and Simulation :: 02-15-2009 20:32 :: shahid78 :: Replies: 0 :: Views: 1391
anyone know how to calculate the efficiency in percent using cst?
hope u all can help me.
Electromagnetic Design and Simulation :: 08-19-2008 04:31 :: kyg :: Replies: 5 :: Views: 2157
I am trying to plot the radiation efficiency of a patch antenna vs thickness of the substrate. I want to see the effect of dielectric loss, conductor loss and surface waves on the radiation efficiency.
Does anyone know how to calculate surface waves for patch antenna with different (...)
Electromagnetic Design and Simulation :: 01-23-2008 20:06 :: harishbigh :: Replies: 1 :: Views: 2486
There are a number of ways to estimate the gain of an antenna.
Here is one: G dbi = 10 log10 ( 4 Π (effective aperture area) / λ?) * efficiency
The distance on the surface of the earth may be calculated using spherical trig. Look up the details is Bowditch ( a bible in the boating world).
Added after 7 m
RF, Microwave, Antennas and Optics :: 07-30-2007 01:32 :: Azulykit :: Replies: 2 :: Views: 1535
Usually we go for efficiency ,once we know the s parametrs and there by the resonace of the antenna ,you know the frequency at which the efficiency is needed and regarding phi and theta ,you can opt for them or not .I guess its better to calculate the efficiency by defining the whole sphere.
Electromagnetic Design and Simulation :: 02-19-2007 16:24 :: pass1 :: Replies: 2 :: Views: 4296
How can I calculate/plot the Gain and efficiency of my antenna?
(1) At single/solution frequency
(2) Over the frequency sweep
Apologize about the reposting but I am clueless on this?
Electromagnetic Design and Simulation :: 09-13-2006 20:41 :: Soyuz :: Replies: 2 :: Views: 1493
How can I calculate the efficiency and gain of an patch antenna modeled in HFSS?
Electromagnetic Design and Simulation :: 09-12-2006 01:16 :: Soyuz :: Replies: 3 :: Views: 2000
Can anybody explain how i can compute gain from radiation pattern? I could not obtain a satisfactory solution for this problem.
Thanks in advance
Measure Half power beam width in the E-plane and H-plane. Multiply them and invert and again multiply with 4*pi. The result will be approximate far field directivity. Now
RF, Microwave, Antennas and Optics :: 01-14-2006 09:49 :: g86 :: Replies: 6 :: Views: 2368
How we calculate the gain of antenna?
high gain antenna is highy directional antenna?
the gain of Yaggi antenna is zero?
Elementary Electronic Questions :: 12-26-2005 06:34 :: mani_sohail :: Replies: 2 :: Views: 1586
I am simulating a p@tch antenna. The S11 plot looks okay and radiation patterns too are okay but when I use the "Compute antenna parameters" feature ( by right clicking the infinite sphere used to calculate the far fields ) , it gives a radiation efficiency of 1.013 . How can this happen ? I am using (...)
Electromagnetic Design and Simulation :: 10-29-2004 10:53 :: svarun :: Replies: 16 :: Views: 8257