A Lowpass Filter with Sharp Roll - off and High Relative Stopband Bandwidth Using Asymmetric High - Low Impedance Patches
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Date
2015-09
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Mark
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Společnost pro radioelektronické inženýrství
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Abstract
In this letter, a microstrip lowpass filter with -3 dB cut-off frequency at 1.286 GHz is proposed. By using two main resonators which are placed symmetrically around Y axis a sharp roll-off rate (250 dB/GHz) is obtained. The proposed resonators are consisted of two asymmetric high-low impedance patches. To achieve a high relative stopband bandwidth (1.82) four high - low impedance resonators and four radial stubs as suppressing cells are employed. Furthermore, a flat insertion loss in the passband and a low return loss in the stopband can prove desired in-band and out-band frequency response. The proposed LPF has a high FOM about 63483.
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Citation
Radioengineering. 2015 vol. 24, č. 3, s. 712-716. ISSN 1210-2512
http://www.radioeng.cz/fulltexts/2015/15_03_0712_0716.pdf
http://www.radioeng.cz/fulltexts/2015/15_03_0712_0716.pdf
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Peer-reviewed
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en