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Hi all,
I am simulating a similar design in HFSS and CST (TD) but getting different impedance. Any suggestions why ? which one would be more close to the real one?
Thanks
Thank you everyone for your help and suggestions. So the problem got rectified using few precautions
1. Placing the feeding wire/line underneath the group plane.
2. Connecting the antenna ground to the measurement setup ground ( there was a large ground plane on which the antenna was placed)...
Thanks for replying guys.
FvM: I do not have ferrite but can make arrangements to place the wires under the ground plane.
BMR: Unfortunately, the casing is required.
Volker: there are definitly reflections but I tested a wired monopole - the results were fine, so I am expecting atleast that...
It is a monopole antenna made up of measuring tape with a pin at one end which is epoxied (conductive) to a sma connector feed by an RG58 cable through a signal generator. The antenna is mounted on a plastic housing and kept on a 1m diameter ground plane. I did get reflections from the wire -...
Hi,
I am trying to measure vertical and horizontal induced voltages of a monopole antenna made out of a measuring tape. Since the antenna is vertically polarized there should be at least 10dB difference but at times it is not - any advise what i might be doing wrong?
Thanks in advance
There are many scenarios where you have to make sure that there are no reflections for instance generating few watts gets expensive as the frequency goes up so you do not want to waste that power by reflections or in radars these reflection might end up at the receiver causing false alarms, or...
Thank you for the reference - got the point that they look at the matching from different perspective but the matching condition remains the same that is real part(i) = real part(j) and reactive (i) = reactive * (j) - to be conjugate of the other .
So for an antenna "It is a well-known fact...
Hi all,
We know that for maximum power transfer Zs = ZL* , this is known as maximum power transfer matching. But there is this reflection less matching which says Zs = ZL. Now if the Z has reactive part then there would be a difference. In antenna feed matching network design which method...
Hi all,
I am simulating a pretty simple monopole antenna and aground plane place after a gap. I have simulated the results with waveport and lumped port - got VSWR = 1.6, and required gain patterns but when I check the Z11 - real and imaginary , I get around 0+5j. What have I done wrong? I...
Hi all,
I am simulating a pretty simple monopole antenna and aground plane place after a gap. I have simulated the results with waveport and lumped port - got VSWR = 1.6, and required gain patterns but when I check the Z11 - real and imaginary , I get around 0+5j. What have I done wrong? I...
hi,
I am trying to design a monopole with a ground plane next to it. Could anyone please advise which would be the best position to place the lumped port? the feed pin (in the direction of fed current) or the gap between the ground and the pin? The port in between would not reflect the actual...
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