Volume 11 Number 2 September 2022

    
Designing Modified Fractal Antenna with Small Sizes

Boncho Bonev, Zornitsa Radkova, Luboslava Dimcheva and Peter Petkov

https://doi.org/10.6025/stj/2022/11/2/27-32

Abstract We have designed the Yagi antenna in this study which is changed to suit Minkowski first order curve. We have fixed an optimum frequency band. The modified fractal antenna provides better bandwidth and maintain the features of Yagi antenna with small antenna size. We have simulation results of testing the antenna with front to back radiation pattern and we have... Read More


Improving the Power Capacity and Reducing Harmonic Distortion with Triangle Signals

Goran S Nikolic, Tatjana R Nikolic, Branislav D Petrovic and Mile Stojcev

https://doi.org/10.6025/stj/2022/11/2/33-40

Abstract To change the DC output to the AC output, we use inverters. The modulation produces pure signals that help in the right pulse. We aim to improve the power capacity and also reduce the harmonic distortion using PWM techniques. We have generated the total harmonic distortion analysis of the new waveform with correct solution using triangle signals. For conducting simulation... Read More


Self-Tuning Low Noise Amplifier During One Design Pattern

Goran Jovanovic, Darko Mitic, Mile Stojcev and Tatjana Nikolic

https://doi.org/10.6025/stj/2022/11/2/41-48

Abstract We have carried out the self-tuning low noise amplifier which is normally termed as One design pattern. To equal the input signal frequency, we developed the phase control loop where the aim is to force the filter central frequency by changing the amplifier resonant. The LNA parameter has consistent maximum gain with good frequency and ensure full tuning for parameter... Read More