Wideband Bandpass Filter Using Coupled Lines With Multiple Transmission Poles and Good Outband Performance
2020
A wideband bandpass filter using coupled lines with sharp roll-off shirts is proposed in this paper. Seven transmission poles within the passband and high out-band rejection performance can be realized through even-and oddmode input impedance calculations. For demonstration, a wideband bandpass filter prototype centered at 1.5 GHz with high-stopband rejection is designed and fabricated. Good agreement between the simulations and measurements validates the design idea.
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