simotic
Junior Member level 2
Dear all,
i'm working on printed antenna design for UWB and WiMAX applications. the S11 obtained are more less than 10 dB (-30 dB for the first antenna, and -50dB for the second designed antenna), but the problem is that the gain of these antennas is less than zero (for the first antenna gain<-2dBi, and for the second gain<0)! so please can anyone explain this phenomena and how can i enhance the gain of the antenna.
To be noted that i use Rogers (Eps=3.38) as subsrate.
Thank you in advance
best regards.
i'm working on printed antenna design for UWB and WiMAX applications. the S11 obtained are more less than 10 dB (-30 dB for the first antenna, and -50dB for the second designed antenna), but the problem is that the gain of these antennas is less than zero (for the first antenna gain<-2dBi, and for the second gain<0)! so please can anyone explain this phenomena and how can i enhance the gain of the antenna.
To be noted that i use Rogers (Eps=3.38) as subsrate.
Thank you in advance
best regards.