Paulpen
Newbie level 4
Dear Fellows,
Please, I need some help with my design of an equilateral patch antenna in HFSS . I have designed a probe-fed triangular patch antenna for 960Mhz operation using a waveport for excitation. The problem is that after simulation my total gain is always negative. However, in most literature they have positive gains.
After simulation I got 945.9Mhz as the resonant freqency and return loss was -20.1242db. The value of the Z parameter was 49. 04ohms, which I feel is close to the "perfect' 50hms and not bad. WIth this value of Z I am assuming that the energy reflection is very minimal. However, when I comptuted the antenna parameters at this frequency I got the following values:
a. Incident Power=1W
b. Accepted Power=990.33mw
c. Radiated Power=165.67mw.
d. VSWR=1.2194
Please, I believe something is not right, especiallly given that so much power is being lost. What could I be doing wrong and what can I do to obtain postive gain values? From the look of things, it appears that some setting might be wrong. Could my far field radiation sphere setup be responsible? Peradventure anyone is interested in taking a look at my design, I could forward the project file.
Thanks in anticipation of your feedback.
Please, I need some help with my design of an equilateral patch antenna in HFSS . I have designed a probe-fed triangular patch antenna for 960Mhz operation using a waveport for excitation. The problem is that after simulation my total gain is always negative. However, in most literature they have positive gains.
After simulation I got 945.9Mhz as the resonant freqency and return loss was -20.1242db. The value of the Z parameter was 49. 04ohms, which I feel is close to the "perfect' 50hms and not bad. WIth this value of Z I am assuming that the energy reflection is very minimal. However, when I comptuted the antenna parameters at this frequency I got the following values:
a. Incident Power=1W
b. Accepted Power=990.33mw
c. Radiated Power=165.67mw.
d. VSWR=1.2194
Please, I believe something is not right, especiallly given that so much power is being lost. What could I be doing wrong and what can I do to obtain postive gain values? From the look of things, it appears that some setting might be wrong. Could my far field radiation sphere setup be responsible? Peradventure anyone is interested in taking a look at my design, I could forward the project file.
Thanks in anticipation of your feedback.
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