30 Threads found on edaboard.com: Cross Dipole Antenna
can somebody help me how to design a cross dipole antenna using cst software?i have try the R.Cahill journal (understanding measuring circular polarization) prototype but i dont understand it,,
RF, Microwave, Antennas and Optics :: 22.07.2010 09:08 :: good cp :: Replies: 2 :: Views: 1424
To simulate LPDA, this is same with yagi antenna (non folded),
But all element is driven and is connected by transmission link with cross link connection.
The transmission line have impedance can build with two parallel boom.
LPDA Book can load in
RF, Microwave, Antennas and Optics :: 14.12.2004 20:24 :: bsiswoyo :: Replies: 6 :: Views: 1900
do any one know how i can add two signal receving from cross cage dipole antenna before tuner or preslector help needed thanx
RF, Microwave, Antennas and Optics :: 13.08.2006 04:31 :: kawish :: Replies: 0 :: Views: 849
Hello Every one,
This is Shaista from Islamabad.I want to do thesis in the field of antenna designing. I have done my Project on 4 cross 4 matrix strip antenna. I want to take it futher for my MS thesis. If any one suggest me any kind of improvement or any book related to antenna designing that help me choosing my thesis. (...)
RF, Microwave, Antennas and Optics :: 08.02.2009 07:45 :: shaista :: Replies: 10 :: Views: 6329
My task for my thesis is to analyze the behaviour of crossed dipole antenna. I have used a design from UPM Frog 3D for simulation using CST STUSIO SUITE. But I don'tknow how to insert 2 discrete ports cross with each other. Anyone has an idea?
RF, Microwave, Antennas and Optics :: 05.12.2011 03:42 :: nmohdfau :: Replies: 4 :: Views: 628
thanks for the nec example. Very much appreciated. However, I notice that there are two source in the quadrifilar. Does this mean the antenna operate in phase quadrature and a phase shifter is needed? Is is possible to use a single feed?
I will like to simulate a x dipole in nec to compare performace. How do I feed this x (...)
RF, Microwave, Antennas and Optics :: 10.06.2004 15:37 :: Element7k :: Replies: 9 :: Views: 3968
Is there anyone study rcs with hfss. I want to learn but havent any tutorial this subject and I need some examples. For example, dipole antenna transmıt the ıncıdent wave to a kind of structure and How can I find the incident electric field on the structure and the scattering electric field.
İf is there a person knows th
Electromagnetic Design and Simulation :: 11.05.2007 06:58 :: betul :: Replies: 0 :: Views: 1510
Which one is co-pol and which one is cross-pol? It is determined by the user. If you consider E-theta on the constant Phi-plane is the co-pol, then the E-phi on the constant Phi Plane is cross-pol.
E-plane is where the E-field is lying on. It is easy to figure it out for simple antennas such as a (...)
RF, Microwave, Antennas and Optics :: 03.03.2009 14:09 :: jian :: Replies: 1 :: Views: 527
With the ground,it's possible to get 9.5dBi from a single dipole.
We are getting 7-8 dBi gain with ground (reflector plate). Please let me know if you have any paper etc to get 9+ dBi gain over 25% bandwidth. I need to use this for cross polarized antenna (+-45; dual linear)
RF, Microwave, Antennas and Optics :: 08.11.2010 02:22 :: chandregowda :: Replies: 6 :: Views: 1109
If I am plotting a graph for Input impedance vs frequency graph for dipole antenna using HFSS version 11. than how can i check that plot is correct or not?i mean my design is accurate or not?
One thing that i know is as following:
When the imaginary part of input impedance crosses 0 at that time the real value (...)
Electromagnetic Design and Simulation :: 16.06.2011 15:05 :: randy orton :: Replies: 6 :: Views: 1402
The purpose of your simulation isn't clear. To take advantage from the cross dipole, it's normally operated with a 90° phase shift network, generating circular polarized waves. If this is the intended operation mode of your antenna, it should be tested with the phase shift network, isn't it?
Averaging input impedances sounds as reasonable (...)
RF, Microwave, Antennas and Optics :: 16.02.2012 04:19 :: FvM :: Replies: 13 :: Views: 1155
if any body has worked on cross bow tie then plz share some papers on it with me,i have not find even a single paper on it,
RF, Microwave, Antennas and Optics :: 04.01.2013 03:16 :: aniakhan :: Replies: 2 :: Views: 520
I've checked what kyjackchan said above and here are my observations. Please give your comments also.
cross-polarization according to HFSS:
The maximum gain (max of the radiation pattern in dB) is located at the same *ANGLE (theta or phi)* in both COPOL and crossPOL.
This is WRONG and cannot be verified EXPERIMENTALLY because:
....... In te
Electromagnetic Design and Simulation :: 19.04.2007 11:04 :: costox :: Replies: 14 :: Views: 4366
Some X-polarization base station antennas have dipole-pairs in two configurations:
1) in X (cross-shaped) providing 90deg HPBW in horizontal plane
2) in <> (rhombic) providing 65dge HPBW...
Take a look at some very interesting articles from Kathrein (with pictures):
RF, Microwave, Antennas and Optics :: 19.05.2005 14:37 :: mogwai :: Replies: 2 :: Views: 1454
At UHF the radio waves travel in approximate straight lines. To find out your ultimate range plot the topological cross section working on the basis of 4/3 X the earths radius, then finding edge of your service area, you then can find out what your aerial height has to be.
Electronic Elementary Questions :: 15.04.2011 12:17 :: chuckey :: Replies: 3 :: Views: 3661
At 2 MHz, you can use a ferrite antenna. It is a small bar of high frequency ferrite material around which copper wire is wound. A capacitor is used to resonate it, so you can make a tradeoff of efficiency vs size (ie make the ferrite bar small but more lossy).
RF, Microwave, Antennas and Optics :: 15.04.2007 11:51 :: biff44 :: Replies: 15 :: Views: 2173
how to define cross polarization of an antenna
RF, Microwave, Antennas and Optics :: 05.04.2008 15:47 :: vivek1214 :: Replies: 4 :: Views: 4769
can any body tell me how to design wide beamwidth (>120 deg) wide bandwidth (>1 GHz) in X-band with low cross-polarization cavity backed antenna asap
RF, Microwave, Antennas and Optics :: 06.10.2008 23:58 :: akedar :: Replies: 6 :: Views: 1134
i know its old post but can help others so for cross dipoles one arm of 1 dipole with 2nd and same for other dipoles then give them single lumped port.A New Type of Circular Polarizer Using
~. F, BOLSTER~, MEMBER, IRE this paper can help
Any body knows how to (...)
Electromagnetic Design and Simulation :: 14.01.2013 22:06 :: aniakhan :: Replies: 1 :: Views: 864
What is the direction of Copolanar ,cross polar radiation in this antenna?
Which plane is the E-plane and which is the H-plane?
The excitation port and radiation boundary Condition is like
Electromagnetic Design and Simulation :: 23.10.2010 05:42 :: project.email :: Replies: 9 :: Views: 3376
The impedance of 73 + j42.2 Ohm is for an infinitesimally thin half-wave dipole, that is, a dipole with zero thickness (zero radius for a cylindrical antenna). Then, this value is obtained theoretically by a limit process in which the dipole cross-section tends to zero. The values around 90-95 Ohm (...)
Electromagnetic Design and Simulation :: 20.10.2011 14:51 :: lurgy :: Replies: 6 :: Views: 1676
im designing dual linear 45 degree slant polarization antenna array
i get this result of co/cross polarisation as in attachment
is it correct?
first diagram is taken at phi 90degree, while the second is at phi
RF, Microwave, Antennas and Optics :: 12.05.2011 04:54 :: vioamethyst :: Replies: 8 :: Views: 1002
I'm new to CST and I've run into a few problems. I'm going to simulate a turnstile antenna for 437 MHz consisting of two crossed half-wavelength dipoles with 2 cm feed gap. One along the x-axis and the other along the y-axis, so the maxima is supposed to be in the z-direction. I've made one (discrete) port for each (...)
Software Problems, Hints and Reviews :: 03.10.2011 18:28 :: marholm :: Replies: 5 :: Views: 1022
hi, i am trying to visualise a linearly polarised antenna in the E-plane cut in HFSS. say for example a dipole in the z-axis.
If i use E(theta) to plot the E-plane pattern, would I get a co-polarised plot?
and if i use E(phi) to plot the E-plane pattern and get a cross-polarised plot?
and if I use a horn to measure the pattern in the (...)
Electromagnetic Design and Simulation :: 07.09.2004 01:54 :: kyjackchan :: Replies: 0 :: Views: 1351
plane wave excitation is useful for simulating radar cross sections (RCS). If your intention is to simulate a far field radiation pattern in a microstrip antenna then you can use either a discret port or a wavegide port but be aware that with discrete ports you´ll get unaccurate solution for S11. With waveguide port (I use it always if possibl
RF, Microwave, Antennas and Optics :: 07.03.2006 05:38 :: dch316 :: Replies: 12 :: Views: 5313
i have faced a problem in building the geometry of a log-periodic dipole array in IE3D. i could not rotate the antenna boom(of rectangular cross section or may be cylindrical also) along its own axis (boom's axis),so that the elements that r in (+z )direction will be oriented in (-z) direction after the desired operation.
Electromagnetic Design and Simulation :: 27.03.2006 04:00 :: abhi_kolkata :: Replies: 1 :: Views: 617
I would use only lumped ports when using wave ports are not possible. Wave ports use a 2D solver on the port cross-section to obtain the modes that will propagate down a transmission line of infinite extent. They can be used for many geometries such as waveguides, stripline, CPW, microstrip, coax, etc.
Lumped ports can be used to feed balanced a
Electromagnetic Design and Simulation :: 16.05.2006 18:29 :: antennas321 :: Replies: 11 :: Views: 2476
I did some empirical experiments with two antennas connected at zero phase. One was horizontal, the other vertical polarization, but because they were electrically small ground planes, there was a lot of cross polarization pick on either.
At certain azimuths, there was a complete null. At others, there was no huge improvement.
In order to g
RF, Microwave, Antennas and Optics :: 03.07.2008 14:12 :: biff44 :: Replies: 6 :: Views: 2642
I got this radiation pattern for an omnidirectional antenna
can u tell this is correct or not
kindly look to the db values in circle
how should i plot Eplane cross and copolar components
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RF, Microwave, Antennas and Optics :: 10.01.2013 02:23 :: kartikkhurana :: Replies: 4 :: Views: 231
I'm in need of knowing the definition of dual circular polarization
- dual circular polarization means that your antenna system can receive both types of circular polarization. crossed dipole/yagi antennas are a possible solution. Spiral antennas are also commonly used to achieve circul
Electromagnetic Design and Simulation :: 24.04.2013 06:09 :: jeeudr :: Replies: 1 :: Views: 370