Sep 20, 2005 #1 G gunajraman Member level 2 Joined Aug 25, 2005 Messages 44 Helped 4 Reputation 8 Reaction score 2 Trophy points 1,288 Activity points 1,627 Hi I am simulating a tear drop antenna in Ansoft Hfss. I am getting a constant value of S11 over 5 GHz which is obviously a wrong result. What could be the problem ? Thanks in advance.
Hi I am simulating a tear drop antenna in Ansoft Hfss. I am getting a constant value of S11 over 5 GHz which is obviously a wrong result. What could be the problem ? Thanks in advance.
Sep 21, 2005 #2 V VSWR Advanced Member level 3 Joined Feb 7, 2002 Messages 746 Helped 103 Reputation 206 Reaction score 24 Trophy points 1,298 Activity points 5,423 It could be caused by many things. It would be helpful if you post your design files here.
Sep 21, 2005 #3 G gunajraman Member level 2 Joined Aug 25, 2005 Messages 44 Helped 4 Reputation 8 Reaction score 2 Trophy points 1,288 Activity points 1,627 I am not able to upload my design file. But I can give you the details, it is the design of a tear drop antenna. I am getting the radiation patterns properly at different frequency points, whereas the s11 is not coming properly.
I am not able to upload my design file. But I can give you the details, it is the design of a tear drop antenna. I am getting the radiation patterns properly at different frequency points, whereas the s11 is not coming properly.
Sep 21, 2005 #4 S sunyvel Junior Member level 3 Joined Jan 28, 2005 Messages 27 Helped 2 Reputation 4 Reaction score 0 Trophy points 1,281 Activity points 228 did you check the port assignment properly? sometimes these problems occur when ports are not proper.
did you check the port assignment properly? sometimes these problems occur when ports are not proper.
Sep 21, 2005 #5 G gunajraman Member level 2 Joined Aug 25, 2005 Messages 44 Helped 4 Reputation 8 Reaction score 2 Trophy points 1,288 Activity points 1,627 Hi, I have checked the port assignments and they seem to be proper. I am getting reasonable results in ansoft designer though
Hi, I have checked the port assignments and they seem to be proper. I am getting reasonable results in ansoft designer though
Sep 22, 2005 #6 S sunyvel Junior Member level 3 Joined Jan 28, 2005 Messages 27 Helped 2 Reputation 4 Reaction score 0 Trophy points 1,281 Activity points 228 then why not use the ansoft designer...it would be faster in simulating your condition
Sep 22, 2005 #7 G gunajraman Member level 2 Joined Aug 25, 2005 Messages 44 Helped 4 Reputation 8 Reaction score 2 Trophy points 1,288 Activity points 1,627 I have found that for designs involving curves , HFSS is much faster than designer. It took almost 3 days for my design to get simulated in designer.
I have found that for designs involving curves , HFSS is much faster than designer. It took almost 3 days for my design to get simulated in designer.
Sep 23, 2005 #8 P popzhou Newbie level 6 Joined Aug 4, 2005 Messages 13 Helped 1 Reputation 2 Reaction score 0 Trophy points 1,281 Activity points 1,396 first plz check your structure and then check the boundry conditions,
Sep 24, 2005 #9 M madhurieunni Newbie level 4 Joined Sep 24, 2005 Messages 7 Helped 1 Reputation 2 Reaction score 0 Trophy points 1,281 Activity points 1,330 I dont think your radiation pattern might be correct, check your design.