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28 Threads found on edaboard.com: Elliptical Antenna
The requirement says.. "The elliptic ratio of the antenna shall be better than 1dB" For a different lower frequency band, another value given was 3dB. For me, I know what is Axial Ratio, and that it can be expressed as number ratio, or in dB, and the common values are not anything like 3dB. Usually fractions of dB. I also know
A simple test is using your circular one and a linear antenna. Point both one to another and rotate one of them. Connect TX to the one you rotate and the other to a RX. If you observe a constant power level, then you have a linear one and a circular one. If not, the circular is not circular, but maybe elliptical or even linear. The other question
I am studying antenna and I have a few question: 1) Is Hertzian dipole linear polarization since the E field is parallel with the orientation of the dipole and radiates out equally out in all Azimuth angle when placed vertically? 2) Same reason as above, a short dipole antenna is linear polarization? 3) Is a horizontally placed loop
hi axial ratio is in this range:0dBelliptical polarization.
Hello all, I have done parametric analysis of elliptical patch antenna. Now i want to plot gain for different resonant frequencies. Can anyone tell me how to plot gain at different frequencies using hfss? Thanks in advance !! Aarti
Hello everyone, I've designed an elliptical patch antenna in CST which works in the frequency of 5.8GHz. But I'm having problems determining whether it is radiating in circular polarization. If I'm not mistaken, for circular polarization the axial ratio must be 1 and if in ludwig coordinates, the field of vertical and horizontal must be in the sam
Hello, I'm trying to improve the gain of my antenna using superstrate. I read a few journals regarding this topic but i could not determine the thickness of the superstrate needed. The frequency that i need to obtain is 5.8GHz and i'm using coaxial feed. This was one of the papers i referred. The thickness of my ground plane is 0.035mm, substrate
can u tel me what formulas used to find the resonating frequency or radii(elliptical patch antenna)...?? is it different from when we analysis for truncated elliptical patch antenna....
Rain does not consist of round droplets but have more elliptical size and are tilted (due to wind). So when you excite a rainy area with a vertical polarized wave, the induced current in the rain droplets may have a (small) horizontal current component. This reradiates and creates a horizontal polarized EM wave component. This component couples
can u pls help me in designing of broadband planar monopole elliptical antenna using hfss software.... regarding how take ports and simulation..... pls help me out... i ll be very greatful to u...
Can anyone please design for me an elliptical patch antenna working at 1.5-2.5 GHz. I'll be grateful. Contact -
i am doing a project on elliptical patch antenna.i need design equations and calculations please give me any advice for this
Ultra Wide Band antennas in PCB can have an elliptical 2D form, for instance. You can find some HFSS tutorials, as starting point to know how to use the software. Ex. em: talk - HFSS Tutorial 1: Microstrip Patch antenna
I have an assignment to design microstrip patch antenna at 5.83ghz with elliptical patch please help how to design .
Hi, I am a newbie to this forum and also to using HFSS for antenna design. I have simulated a design using HFSS and still unsure whether the antenna can be used within the UWB range. So far, I have the VSWR, s11 and Gain radiation patterns in DB from 2-11 GHz(attached). I need advices/suggestions on how to improve on my design, how to plot radia
An elliptical monopole printed antenna, for instance
Hi All, I designed an UWB antenna Using HFSS. Is there any way that i can check the polarization of my antenna (e.g circular-linear-elliptical)?
I think there are many ways to make a circular polarized patch antenna. Corner truncated is an easy one. The other ways are "dual microstrip-edge-fed circularly polarised rectangular patch antenna", "elliptical edge-fed circularly polarised patch", "circular-polarised slotted cross patch", and many more. I have experience with corner (...)
hi..anyone here know how to determine whether the antenna is perfectly circular polarized or elliptical..can someone explain more about this.. thnx..
I'm referring to polarization as in Linear, Circular & elliptical. For an antenna in general, there are 1/r, 1/r^2 and 1/r^3 terms for the field. In the near field, the 1/r^2 and 1/r terms are non-zero. Can i say that since the 1/r term exist also in the near field, the polarization would be independent of distance.
Please find the file: c:\zeland\ie3d\ie3dlibrary_examples\crescent_patch_shifted.ie3 file for IE3DLIBRARY. It is more complicated than the monopole. The structure is object-oriented and fully parameterized. You can just take out the object for the circular circular hole and change the aspect ratio of the elliptical patcha nd it becomes the shape ma
Hi, Wingji: Yes. You can do it quite easily using IE3DLibrary. Please use IE3DLibrary to open the existing examples in .\zeland\ie3d\ie3dlibrary_examples. There are quite some good examples. In fact, the ep4.ie3 file is a very interestsing one. It is a UWB antenna created using 4 elliptical shapes. You can change the dimensions of the (...)
this may sound to be simple but there is some confusion regarding polarization status of antennne in CST. 1:how to determine that antenna is linearly polarized or circular or elliptical? 2: if its linear then how to determine whether its vertical polarized or horizontally polarized? 3: if its circular or elliptical polarized how to (...)
thanks. Y. Gao, B. Ooi, and A. P. Popov, ?Band-notched ultra-wideband ring-monopole antenna,? Microwave and Optical Technology Letters, vol. 48, no. 1, pp.125-126, Jan. 2006. A. Mirkamali, P. S. Hall, and M. Soleimani, ?elliptical multiple-ring monopole antennas,? Microwave and Optical Technology Letters, vol. 48, no. 1, pp.4-8, J
Hi, i am getting elliptical polarization in result of HFSS simulation of a conical horn antenna. i want to give it circular polarization,please help me how to acheive it as i dont know how to define modes as i was told to use TE 01 mode. kindly look into the matter and help me acheive the desired result. thanks.
Hi, djim: I checked your structure. The problem is in the connection between the feed line and the elliptical patch. They have only one common vertex but no common edge. They are disconnected. I have fixed the structure as pcp_r2.geo in the attached files.zip. I also created a parameterized model pcp_r3.ie3 on IE3DLIBRARY. All the major d
Hi: I tried an antenna example with 4 elliptical shapes and the result is excellent. I could easily achieve S(1,1) < - 10 dB from 3 to 11 GHz. The size is just regular shape. The example is documented in the IE3D manual as an example using the FastEM Design Kit for real-time EM synthesis. Interested users can check it ( ). Regards
Hi, I am not sure I understand your question. but tne factors that determine the polarization of the antenna ar 1. The antenna shape, e.g. helical antenna has elliptical polarization while pyramidal horn has linear polarization. 2. The antenna feed. BR Adl_48