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Positive Radiation Efficiency

 
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jagan316
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Joined: 31 Jan 2011
Posts: 4
PostPosted: Fri Mar 04, 2011 10:33 am    Post subject: Positive Radiation Efficiency Reply with quote
I simulated a PIFA antenna in CST microwave studio over a bandwidth . At some frequency points i get a positive radiation efficiency .
Freq (Mhz) Radiation Eff.
160 0.49 (111%)
162 0.06 (101%)
165 -1.92 (65%)

My thinking is either at frequency the mesh might not be optimum and there software errs in calculating radiation efficiency .

Let me know your thoughts if you ever encountered such problem.

Thanks
Jagan
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