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Hi FvM,
Thanks for the reply. Unfortunately, I am not allowed to share the structure of the antenna.
Actually, it is an array. Each element matches well, meaning that they match well to a 50 Ohm load. But the feeding network seems too long compared with the guided wavelength. Instead of...
Hi FvM,
Thanks for the suggestion.
To increase the antenna's bandwidth with a lossy matching circuit, the gain could be decreased. Any idea about how to match the antenna while maintaining the gain at the same time.
I can not quite understand 'And to refer to the other problem, one way to...
Hi FvM,
The load impedance is shown attached. It resonates at 145 GHz indeed.
Since I just need 10 GHz matching band from 140-150 GHz, or 7% bandwidth. Is it possible to achieve 7% impedance bandwidth with a resonant antenna？
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Hi FvM,
Can you pls suggest why too much...
Hi guys,
I have a trouble in matching the circuit. Can anyone kindly sugggest what I should do? Attached is the rectangular plot of the S11 and the S11 contour on smith chart.
Can anyone suggest that how I can shrink the contour of the S11 into the VSWR=2 circle in smith chart for a good...
Hi,
Does anyone know how much insertion loss of the 170 GHz 75-um pitch waveguide Picoprobe?
I am trying to calibrate the power before and after the probe. However, I do not have the data sheet of the insertion loss of that probe.
I wrote to the Picoprobe company asking for the data, but...
Hi Reidintransit,
Tks for the reference. Do you have any ideas of why we are warned against using the quarter wavelength wide microstrip line？
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Hi R.,
Do you have any ideas or experience of the Leaky Modes and spurious oscillations, as mentioned in 'The danger of...
Hi,
Thanks. It helps.
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Hi, Thanks.
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Hi,
On page 8, it warns against the width of MS line as half guided wavelength rather than a quarter wavelength.
I am wondering what if the line width is a quarter wavelength. 'Cause I always see a warning in...
Hi,
Thanks for the reply.
I mean what if the characteristic impedance is the same for two different MS lines, but on of the them is much larger than the other. Of course, the substrate thickness and permittivity may differ.
Hi,
Under the condition that the length of a microstrip line is much larger than the width:
Does anyone know why the microstrip line is always designed narrower than a quarter guided wavelength?
What if the microstrip line is wider than guided wavelength?
Thanks.
Hi all,
Can anyone explain in an easily understandable way that why it is easier for impedance matching on substrates of low permittivity that on substrates of high permittibiy?
Thanks in advance.
Hi all,
Can anyone please help to clarify that what is the definitiong of beam-forming? And what is the difference between 'beam-forming' and 'beam-scanning'?
Thanks in advance.
Hi all,
Can anyone provide a basic introduction of the MIMO antenna? I mean that when thinking about designing a MIMO antenna, what the parameters of the antenna we should look at? S-parameters? Patterns? Gain? Or other else.....
Thanks in advance.
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