12 Threads found on edaboard.com: Vswr Ads
Do can we plot the vswr chart for various frequencies in ads , say for analysing the results for a Microstrip antenna. and what are considered the good values of vswr
RF, Microwave, Antennas and Optics :: 01-11-2012 14:03 :: antennadesign54321 :: Replies: 12 :: Views: 4798
I want to calculate the Gain,vswr of a micro strip antenna which is designed. I wanted to see the Gain,vswr change with frequency, I'm using Layout Window to create the antenna.
I would really appreciate if someone can guide me.
RF, Microwave, Antennas and Optics :: 01-12-2012 22:30 :: antennadesign54321 :: Replies: 2 :: Views: 952
Did you expect good vswr over the full 1 to 5 GHz frequency range? The answer will be definitely NO.
Do some study on the behavior of thin wire dipoles or monopoles and you will see that you need a compete other approach to make something that has good vswr/return loss over 1 to 5 GHz.
Regarding the center frequency (your
Electromagnetic Design and Simulation :: 09-08-2011 15:13 :: WimRFP :: Replies: 7 :: Views: 1844
there is a ku_band directional couplers , the vswr is below -20,and the il<1.5dB,isolation>-24,but coupling is between -17dB~-11dB.I simulation in ads ,the coupling is -15dB~-16dB, could you tell me hou can i solution it??
RF, Microwave, Antennas and Optics :: 07-30-2010 05:23 :: lorna_li :: Replies: 0 :: Views: 734
Thank you vswr but i have it from nec site and i think it's not completed.
In attached file the converted spice to ads, you can remark that there are no ports and even i made the ports the model did not work, could you please verify that?
RF, Microwave, Antennas and Optics :: 08-02-2009 07:00 :: nassim1 :: Replies: 3 :: Views: 1234
It has been quite long time since I used ads for the last time! I believe you can do it very easily on ads...
First, I'd like to say that as u may know, vswr is a measurement of loading effect on signal at transmission lines, or in other words, how big portion of the signal would propagate through the load. If that is what u are (...)
RF, Microwave, Antennas and Optics :: 04-29-2009 10:29 :: ahmad_abdulghany :: Replies: 1 :: Views: 1187
I want to reformulate my previous post by simple question: how to find the Q factor for a resonant antenna or a resonant Transmission Line using S parameters from ads or HFSS simulation.
I know that Q is equal to fcenter/bandwith. How to calculate the bandwith, can i find this bandwidth from -10dB or vswr(S11),vswr(S21).
I find (...)
Electromagnetic Design and Simulation :: 05-08-2008 04:42 :: MrElec :: Replies: 0 :: Views: 2086
How can I plot E-theta and E-phi 2D polar far-field radiation patterns in ads? I want to compare both? How can I do this in ads?
What's the impact of Axial ratio, which is best low or high?
How can I plot vswr vs. Frequency in ads?
How can I know in ads, whether impedance is matched or not? (...)
Electromagnetic Design and Simulation :: 03-29-2008 18:07 :: imranshoaib :: Replies: 1 :: Views: 1522
Anyone who know how to add a vswr=2 circle in the smith chart in ads data display file?
RF, Microwave, Antennas and Optics :: 03-08-2006 10:22 :: alard :: Replies: 6 :: Views: 3251
Normaly I used vswr(S(1,1)) for vswr value reading.
Can I read vswr value when I put a mark on the S11 trace without
set any equation in ads ? Thanks a lot.
RF, Microwave, Antennas and Optics :: 08-03-2005 11:39 :: ajhsu :: Replies: 2 :: Views: 2387
Given a complex reflection coefficient, this measurement returns the voltage standing wave ratio.
you can define a syntax as example:
a = vswr(S11)
RF, Microwave, Antennas and Optics :: 05-29-2005 09:28 :: wjnbry :: Replies: 1 :: Views: 956
Constant vswr circles are actually constant gain circles. Device itself has gain that coresponds to Gmax at a given frequency. By chosing the gain smaller that Gmax (selecting a constant gain circle instead of a dot that corespond to Gmax) you are mismatching the device. The mismach is constant on a constant gain circle, so is the vswr. You
RF, Microwave, Antennas and Optics :: 03-03-2005 04:20 :: flyhigh :: Replies: 1 :: Views: 3693