Journal
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
Volume 24, Issue 6, Pages 367-369Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LMWC.2014.2310472
Keywords
Bandpass filter (BPF); bridged-T coil; integrated passive device; multi-mode resonator; ultra-wideband (UWB)
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Funding
- National Science Council of Taiwan [NSC 99-2221-E-008-096-MY3, NSC 100-2628-E-008-010-MY3]
- National Chip Implementation Center, Taiwan
- National Center for High-Performance Computing, Taiwan
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In this letter, a miniaturized ultra-wideband band-pass filter based on thin-film integrated passive device process is proposed. The multi-mode resonator is adopted to achieve a wide bandwidth from 3.1 to 10.6 GHz. By using the bridged-T coil to replace the transmission line of multi-mode resonator, the circuit size is largely reduced while the multi-mode property can be retained. The filter size without pads is 2.21 mm 1.04 mm, which is only about 0.050 lambda(0) x 0.024 lambda(0) at the center frequency of 6.85 GHz. To our knowledge, this is the smallest multi-mode resonator filter ever published.
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