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microstrip antenna with negative gain

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Ikaiaini

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Dear all

I have made mirostrip antenna with shorting circuit techniques to reduce the size of the antenna, but it produced very little bandwidth. so T replaced the shorting pin with 1 ohm chip resistor. when I simulate in software CST Microwave, Realized gain antenna is about-32dB. Why the value of this gain is negative?

Thanks you
Ikaaini
 

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