Designing of Open Stub Low Pass Filter for 1.4 GHz

This paper presents the design and analysis of folded open stub impedance Micro strip Low-pass filters at cutoff frequency 1.4 GHz which gives insertion loss (S21) of -3. 413 dB and return loss of-2.571 dB at cut-off point. Design with making by the micro strip technology, it becomes more practical and widely used in modern Microwave circuits. This filter has less complexity and more compact size rather than other filters. Simulation is performed with the help of IE3D 14.1 Electromagnetic simulator, based on method of moments and results have been fairly good.