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In this paper, a narrow bandwidth dual-band (DB) band-pass filter (BPR) with λg/2 open stubs using composite right/left-handed (CRLH) meta-material transmission lines is presented. A conventional narrow BPF with λg/2 open stubs is first designed using series λg/2 open stubs and λg/4 transmission lines. Then, a DB filter can then be easily implemented by replacing the microstrip lines with the CRLH...
In this paper, a new BPF with PCL structure has been discussed. The conventional BPF with PCL structure has limitation in 20% bandwidth and it cannot be easily realized due to very narrow coupling gaps when wide bandwidth is required. The new PCL BPF structure has two long coupling sections (J-inverters) and extra capacitive coupling gap between upper lambdaepsiv/4 lines. That is why this new structure...
In this paper, simple ultra-wideband interdigital bandpass filter with vertical coupling structure has been successfully demonstrated. This filter provides small size, sharp skirt characteristic by transmission zero, and ultra wideband using vertical coupling structure. From the measurement results, the bandpass filter shows the insertion loss of less than 1.8 dB and the return loss of better than...
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