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196 Threads found on Antenna Far Field
Hi, I am using two vivaldi antennas separated with their far field distance (~80cm) in CST Since they are UWB antenna, so I am trying to excite Tx antenna with an input UWB signal (i1 as indicated in port signal folder) But after simulation is completed, I do not see the port signal of Rx (...)
I have two antenna designs in hfss. I want to include one antenna into other antenna file (instantiate design in cadence). Is there any way to perform this function in hfss? When we set the boundary in hfss, it computes maxwells equation on this boundary?. If so, the radiation pattern will be reliable only at that boundary or at infinite (...)
Hi, I am trying to find Group delay of vivaldi antenna working in 3-5GHz. I used HFSS 16.1.0 and placed two identical antennas at a distance of its far field. After simulation, I found the group delay from Results>Create modal solution data report>Rectangular plot> Group delay My question is that there are actually (...)
Hi I also meet the same problem, suggest to download Ansoft antenna Design Kit and read "help" document. Need to create a "virtual air box" for solve far field used, also can read HFSS workshop Chapter3 will be helpful. Enzo
Hi, first off all you need to understand the Radiation Boundary you use. The thing you want to simulate is the far field characteristics of your antenna in an infinitly large air box. As this cannot be designed you put the radiation boundary at the end of a finite airbox. This boundary is shall absorb all incoming waves but to work well it (...)
How can I identify which edge of the antenna is radiating for a particular resonant frequency, especially when multiple edges are there for a microstrip patch antenna? What information do you have available? You should always be able to tell by observing the fields; if you only have the far-field data, you (...)
hi everyone. Please help me in getting radiation patterns. I have simulated UWB monopole patch antenna with CPW feed. I got the S11, VSWR etc but antenna is not giving the radiations. there is no radiation on radiation. can any one suggest me a solution? is there a problem with boundary conditions, Port or anything else?
Hi, Does anybody knows why the dipole antenna (half-wavelength, short, infinitesimal) has a null at theta = 0? I know that the pattern of dipoles have sin(theta) and therefore at theta = 0 is zero. But what is the background physics? Thanks
Hi Vitoa, Your sensor is not really an antenna. There is not radiation involved in your sensor, but impedance changes. The radiation patterns you show are in far field in free space. You sensor would act a a very poor radiator even if free space (very low radiation resistance), a bit because it is short with respect to 1/4 of wavelength (...)
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 (...)
I used "Ansoft HFSS antenna Design Kit" to design and simulate antenna. Normally, I choose which frequency I want to simulate and get the result in it at the first step.
In general, the polarization of the radiating element is determined by the orientation of the fields and current. For example the dipole has a polarization vector determined by the current on it. In farfield, in the horizon direction is actually parallel to the current vector on the dipole. What is the type of antenna you (...)
Hello All, I want to find the atenna efficiency i go throug these steps: Create far field Plot --> Rectangular Plot --> antenna Parameters --> Radiation Efficiency. I get the results. The y scale is ( 1, 1.005, 1.001, 1.015, ...). I want the result in percentage. Can you help me to get this result? Thank you Kawther
Hello All, Please help me in plotting the gain in HFSS. I go through these steps: result/ far field report/rectangular plot /antenna params/ Peak gain or peak realized gain / and set solution in context to sweep and primary sweep to freq, and press new report, but the HFSS does not give me result. It keeps loading!! Please help. (...)
Hello All, Can you please help me in obtaining an antenna gain pattern. After selecting the Creating far field Plot --> Rectangular Plot --> Category (Gain). What are the other things that i should determine to get Gain vs. Frequency pattern? Thank you Kawther There is not going to be any gain Vs fre
i designed a wire dipole antenna in FEKO and simulated it . i found it directivity by using the equation Directivity = 2/(cosθ1-cosθ2) . θ1,θ2 are the 3db points of elevation plane of the dipole antenna. i got θ1 as 51.6 degree and θ2 as 128.6 degree hence my directivity becomes 1.6129 dbi. i found the aperture of th
Hellow, How to calculate the free-space field intensity of the antenna in its model - to find the dependence of the absolute values of intensity in the far field (R>> λ) from the angles Θ,φ, and distance R , for example, for a half-wave vibrator, with a known input power? There HFSS model?
Hi, I'm trying to plot the far-field radiation pattern of a thin wire dipole antenna using the equation I found on balanis book(antenna theory, 3rd edition, section 4.5.2): E_{\theta} = j{\eta}\frac{ke^{-jkr}}{4{\pi}r}sin({\theta}){\int}_{-l/2}^{l/2}I_{e}(x',y',z')e^{jkz'cos({\theta})dz'} When the current feed 'Ie' (...)
The patch antenna for operating 2.4 ghz resulted graphs which I attached. can someone explain me what are the results I got like gain ,vswr,impedance,etc.,114205114204
I fear your latest posts are further confusing your intentions. In terms of RF engineering, an antenna is a device with non-zero coupling to far-field. Inductive couplers are designed to receive or generate a magnetic near-field. They are used in a kHz to multiple 10 MHz range to transmit data or power wirelessly. They (...)