Compact microstrip low pass filter with flat group-delay using triangle-shaped resonators |
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| Institution: | 1. Department of Electronics & Telecommunication Engineering, SGSITS, Indore, MP 452003, India;2. Department of Electronics & Instrumentation Engineering, SGSITS, Indore, MP 452003, India;3. Department of Electronics & Communication Engineering, AITR, Indore, MP 453771, India;4. Department of Electrical Engineering, IIT Bombay, Mumbai, MH 400076, India;1. Department of Electrical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran;2. Department of Electrical Engineering, Yazd University, Yazd, Iran;1. Department of Electrical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran;2. Department of Electrical Engineering, Razi University, Kermanshah, Iran |
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| Abstract: | In this paper, a compact microstrip lowpass filter (LPF) using triangle-shaped resonators is presented. The designed LPF includes three symmetric triangle-shaped resonators to provide a suitable passband and sharp response. A suppressing unit composed of several suppressing cells is designed to obtain a wide rejection band and low insertion loss in the passband. The fabricated LPF has been measured and indicts that it has ?3 dB cut off frequency at 5.15 GHz. The rejection band has been expended from 5.51 GHz to 43.2 GHz with maximally flat return loss in this region nearby to 0 dB. Also, simulation and experimental results show that the proposed filter has a very flat group delay in the passband, which is the minimum value in comparison with the published works since 2017. |
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| Keywords: | Flat group delay Microstrip Lowpass filter Triangle-shaped resonator Wide stopband |
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