In this paper, a new neuro-based approach using a feed-forward neural network is presented to design a Wilkinson power divider. The proposed power divider is composed of symmetrical modified T-shaped resonators, which are a replacement for quarter-wave transmission lines in the conventional structure.The proposed technique reduces the size of the power divider by 45% and suppresses unwanted bands up to the fifth harmonics. To verify the concept, a prototype of the power divider has been fabricated and tested, exhibiting good agreement between the predicted and measured results. The results show that the insertion loss and the isolation at the center frequency are about 3.3 ± 0.1 dB and 23 dB, respectively.
K E Y W O R D Sartificial intelligence, couplers, evolutionary optimization, harmonic suppression, lumpedequivalent circuit, microstrip technology, neural network, Wilkinson power divider
In this paper, a new Wilkinson Power Divider (WPD) using open and short stubs is proposed. Open and short stubs are utilized instead of 1/4 wave transmission lines in initial structure to achieve harmonics suppression. The proposed WPD is designed for operational frequency of 0.9 GHz and creates 3 transmission zeros at 1.8 GHz, 2.7 GHz and 3.6 GHz, for suppressing second, third and fourth harmonics. The proposed WPD has been fabricated and the measurement results are in good accordance with simulation results. The designed WPD has a 22 % fractional bandwidth with 0.1 dB insertion loss.
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