Title :
The research of miniaturized multi-stage LTCC bandpass filter to achieve high performance
Author :
Yong-sheng Dai ; Xiang-zhi Chen
Author_Institution :
Sch. of Electron. & Opt. Eng., Univ. of Sci. & Technol., Nanjing, China
Abstract :
In this paper, a multi-stage LTCC bandpass filter with an good performance is proposed, which composes of six resonators. Two transmission zeros were realized by cross-coupling to achieve good stop-band attenuation. The filter is implemented based on the theory of the tapped combline filter, 3-D EM simulation technology, and design of experiment (DOE) method. It presents a small size, high frequency selectivity, steep sideband, and high stopband rejection. The measured results of the filter match well with the electromagnetic simulation results. The six order band-pass filter has a central frequency of 2.775GHz, and its 3dB bandwidth is 170MHz. Stop-band attenuation is more than 35dB from 2.4GHz to 2.553GHz and from 2.997GHz to 3.1GHz. The size of the fabricated filter is 4.5mm×3.4mm×1.5mm.
Keywords :
band-pass filters; ceramics; design of experiments; microwave filters; 3D EM simulation technology; DOE method; LTCC bandpass filter; bandwidth 170 MHz; design of experiment method; electromagnetic simulation results; frequency 2.4 GHz to 2.553 GHz; frequency 2.775 GHz; frequency 2.997 GHz to 3.1 GHz; high frequency selectivity; high stopband rejection; low-temperature cofired ceramic; size 1.5 mm; size 3.4 mm; size 4.5 mm; steep sideband; stop-band attenuation; tapped combline filter; Band-pass filters; Couplings; Filtering theory; Microwave circuits; Microwave filters; Resonator filters; LTCC; bandpass filter; high performance; transmission zero;
Conference_Titel :
Wireless Personal Multimedia Communications (WPMC), 2014 International Symposium on
Conference_Location :
Sydney, NSW
DOI :
10.1109/WPMC.2014.7014914
