DESIGN A NEW STRUCTURE 2.4 GHz/5.2 GHz DUAL-BAND BANDPASS FILTERS ON THE MgTa{sub}1.5Nb{sub}0.5O{sub}6 CERAMIC

摘要

In this article, a λ/2 U-shaped hairpin resonator was contained in a modified end-coupled microstrip line. The increase of the sizes of U-shaped hairpin resonator and modified end-coupled microstrip line had no influence on the lower operating frequency and would shift the upper operating frequency to lower values. After finding the best designed parameters, a miniature dual-band microstrip bandpass filter with three transmission zeros generated in the stop-bands was developed on the MgTa{sub}1.5Nb{sub}10.5O{sub}16 microwave dielectric ceramic substrates. The dual-band filter had the central frequencies of 2.45 and 5.2 GHz and was suitable for the applications in the modern WLAN communication.