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This microstrip dual-band bandpass filter consists of double open-ended resonators and dumbbells designed by using the concept of symmetry. Two transmissions zero appear by zero-degree feed position. The proposed bandpass filter is created to support WLAN applications at 2.45 GHz and 5.20 GHz, respectively. Both insertion losses are greater than −0.9 dB and the return losses are below −18 dB. The...
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