Title: Miniaturised tri‐band lowpass–bandpass filter using lumped‐element structure
Abstract: In this Letter, a miniaturised tri-band lowpass–bandpass (LP-BP) filter is proposed by using lumped-element structure. The lowpass passband (LP) and the first bandpass passband (1-BP) are produced by using the transmission zeros to divide a lowpass filtering response into a dual-band LP-BP filtering response. The second bandpass passband (2-BP) is produced by further loading a lumped-element circuit. As an example, an LP with 3 dB cut-off frequency of 1 GHz, and two BPs centred at 2.45/5.2 GHz for the WLAN applications are designed. The fabricated tri-band LP-BP filter has low passband insertion losses of 0.08/0.69/1.38 dB, and occupies a compact circuit area of 0.055λgc × 0.063λgc.
Publication Year: 2019
Publication Date: 2019-01-24
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 11
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