Compact microstrip low pass filter with flat group-delay using triangle-shaped resonators |
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| Affiliation: | 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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