DocumentCode :
895830
Title :
Harmonic-suppression LTCC filter with the step-impedance quarter-wavelength open stub
Author :
Tang, Ching-Wen
Author_Institution :
Dept. of Commun. Eng., Nat. Chung Cheng Univ., Taiwan, Taiwan
Volume :
52
Issue :
2
fYear :
2004
Firstpage :
617
Lastpage :
624
Abstract :
An effective method to design a low-temperature co-fired ceramic RF bandpass filter with suppression of the harmonic frequency is demonstrated in this paper. The second harmonic, which appears in the frequency band of 4.8-5.0 GHz, is very significant and should be reduced in the 2.4-GHz wireless local area network and Bluetooth application. This feature of harmonic frequency suppression is very important in a communication system to improve linearity, output power, intermodulation performance, etc. The harmonic-suppression filter can be easily obtained by adopting the characteristic of equivalent quarter-wavelength resonators. The detailed three-dimensional layout of each layer is disclosed. By analyzing the influences of the dielectric constant and layer thickness of a ceramic sheet by electromagnetic simulation, the optimal condition for the filter design can be obtained. The measured results agree well with the simulation.
Keywords :
Bluetooth; UHF filters; computational electromagnetics; electric admittance; equivalent circuits; harmonics suppression; resonator filters; wireless LAN; 2.4 GHz; Bluetooth; RF bandpass filter; effective design; electromagnetic simulation; equivalent circuit; equivalent quarter-wavelength resonators; harmonic-suppression LTCC filter; modified resonator; multilayer filter; optimal condition; step-impedance quarter-wavelength open stub; three-dimensional layout; wireless local area network; Band pass filters; Bluetooth; Ceramics; Design methodology; Linearity; Power harmonic filters; Power system harmonics; Radio frequency; Resonator filters; Wireless LAN;
fLanguage :
English
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9480
Type :
jour
DOI :
10.1109/TMTT.2003.822022
Filename :
1266888
Link To Document :
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