Title :
Novel Compact LTCC UWB Bandpass Filter with Additional Transmission Zeros on Stop Band
Author :
Chen, Chien-Heng ; Lin, Kuan-Huang
Author_Institution :
Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung
Abstract :
Novel circuit model and design method for miniature LTCC UWB bandpass filter were presented. The filter prototype is simply composed with several semi-lumped elements (transmission lines and capacitors) for easy fabrication in LTCC process as size of 3.2times2.5times1.0 mm3 and half-circuit synthesis was also proposed for transmission zero and reflecting poles discussions. Two parallel capacitors added on general Chebysheve bandpass filter contributed two additional zeros to extend stop band in higher band The filter measurement agreed with the EM simulation as expected and behaves an ultra wider 3 dB bandwidth range from 3.1~10.6 GHz with the insertion loss less than 1.0 dB cross centre band and 20 dB minimum of rejection on zeros.The wider stop band in higher band also achieved due to additional two zeros contribution in novel design.
Keywords :
Chebyshev filters; band-pass filters; capacitors; expectation-maximisation algorithm; transmission lines; Chebysheve bandpass filter; EM simulation; capacitors; circuit design; circuit model; compact LTCC UWB bandpass filter; filter measurement; half-circuit synthesis; miniature LTCC UWB bandpass filter; stop band; transmission lines; transmission zeros; Band pass filters; Capacitors; Chebyshev approximation; Circuit synthesis; Design methodology; Distributed parameter circuits; Fabrication; Filtering theory; Poles and zeros; Prototypes;
Conference_Titel :
Millimeter Waves, 2008. GSMM 2008. Global Symposium on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-1885-5
Electronic_ISBN :
978-1-4244-1886-2
DOI :
10.1109/GSMM.2008.4534606
