LTCC bandpass filter for Bluetooth™ application with dual transmission zeros

Author

Dai, Yong-sheng ; Zhang, Hai-Shen ; Qi, Gao-Pin ; Lu, De-Long ; Tao, Zheng-Lian ; Qian, Gui-Xiang ; Wang, Hui

Author_Institution

Nanjing Univ. of Sci. & Technol., Nanjing

Volume

1

fYear

2008

fDate

21-24 April 2008

Firstpage

284

Lastpage

286

Abstract

A LTCC band-pass filter with dual transmission zeros for Bluetoothtrade application was presented. With the classic network synthesis method, a lumped LC filter was educed and then transformed to physical prototype with LTCC process. This prototype was refined with DOE method, and was implemented in Zhejiang Zhengyuan Electric Co. Ltd. The measured insertion loss is less than 1.8 dB at 2400 MHz, and two transmission zeros are obtained at 1.7 and 7.1 GHz, respectively. They result in 40-45 dB for lower stop band suppression and 45-50 dB for higher stop band reduction. The experimental data agree very well with the 3-D simulation.

Keywords

Bluetooth; UHF filters; band-pass filters; crystal filters; microwave filters; network synthesis; Bluetooth; LTCC bandpass filter; Zhejiang Zhengyuan Electric Co Ltd; dual transmission zeros; frequency 1.7 GHz; frequency 7.1 GHz; insertion loss; low temperature cofired ceramic filters; lumped LC filter; network synthesis method; Band pass filters; Circuits; Dielectric loss measurement; Filtering theory; Inductance; Inductors; Loss measurement; Network synthesis; Prototypes; US Department of Energy;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave and Millimeter Wave Technology, 2008. ICMMT 2008. International Conference on

Conference_Location

Nanjing

Print_ISBN

978-1-4244-1879-4

Electronic_ISBN

978-1-4244-1880-0

Type

conf

DOI

10.1109/ICMMT.2008.4540363

Filename

4540363