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multilayer design

Question asked by manojkc on May 8, 2013
I want to design microstrip antenna for GSM applications. i designed a 2 cross 2 array antenna for 890 MHz.
but the bandwidth of designed antenna is about 4 MHz. it is not enough for GSM application. in order to increase the bandwidth i would like to go for multilayer design. how multilayer design is performed using ADS.