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## Calculate Antenna Efficiency |

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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**

Hi,
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**

hi
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
regards

Electromagnetic Design and Simulation :: 02-15-2009 20:32 :: shahid78 :: Replies: **0** :: Views: **1391**

hello everyone,
anyone know how to **calculate** the **efficiency** in percent using cst?
hope u all can help me.
regards,
kyg

Electromagnetic Design and Simulation :: 08-19-2008 04:31 :: kyg :: Replies: **5** :: Views: **2157**

Hello everyone
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 **calculate**d 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**

Hi wesleyclone,
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**

Hi All,
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?
Thanks,
Soyuz

Electromagnetic Design and Simulation :: 09-13-2006 20:41 :: Soyuz :: Replies: **2** :: Views: **1493**

Hi All,
How can I **calculate** the **efficiency** and gain of an patch **antenna** modeled in HFSS?
Regards,
-- Soyuz

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**

Hi all,
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**

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