超宽带(UWB)滤波器的综合理论

超宽带(UWB)滤波器的综合理论

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ISSN1751-8725

766IET Microw.Antennas Propag.,2008,Vol.2,No.8,pp.766–772 &The Institution of Engineering and Technology2008doi:10.1049/iet-map:20070342

Authorized licensed use limited to: Kanagawa University. Downloaded on June 14, 2009 at 09:27 from IEEE Xplore. Restrictions apply.

超宽带(UWB)滤波器的综合理论

http://www.77cn.com.cn

Figure1Con?gurations of UWB?lters with symmetrical

unsymmetrical one-wavelength parallel-coupled SIRs

UWB?lter with multi-stage SIRs

UWB?lter with one-stage SIR

UWB?lter with two-stage unsymmetrical SIRs

UWB?lter with two-stage conventional quasi-symmetrical

let Z12¼Z13(or w2¼w3)in Fig.1c)

Figure2Con?guration of parallel-coupled line

a Parallel-coupled line structure

b Equivalent circuit

IET Microw.Antennas Propag.,2008,Vol.2,No.8,pp.766–772767 doi:10.1049/iet-map:20070342&The Institution of Engineering and Technology2008 Authorized licensed use limited to: Kanagawa University. Downloaded on June 14, 2009 at 09:27 from IEEE Xplore. Restrictions apply.

超宽带(UWB)滤波器的综合理论

http://www.77cn.com.cn

Plots of Chebyshev transfer function for proposed UWB?lters

of one stage(n¼1)

of two stages(n¼2)

three stages(n¼3)

768IET Microw.Antennas Propag.,2008,Vol.2,No.8,pp.766–772 &The Institution of Engineering and Technology2008doi:10.1049/iet-map:20070342

Authorized licensed use limited to: Kanagawa University. Downloaded on June 14, 2009 at 09:27 from IEEE Xplore. Restrictions apply.

超宽带(UWB)滤波器的综合理论

http://www.77cn.com.cn

IET Microw.Antennas Propag.,2008,Vol.2,No.8,pp.766–772769 doi:10.1049/iet-map:20070342&The Institution of Engineering and Technology2008 Authorized licensed use limited to: Kanagawa University. Downloaded on June 14, 2009 at 09:27 from IEEE Xplore. Restrictions apply.

超宽带(UWB)滤波器的综合理论

http://www.77cn.com.cn

Figure4Simulation,measurement and theoretical

responses of one-stage UWB?lter as shown in Fig.1b

770IET Microw.Antennas Propag.,2008,Vol.2,No.8,pp.766–772 &The Institution of Engineering and Technology2008doi:10.1049/iet-map:20070342

Authorized licensed use limited to: Kanagawa University. Downloaded on June 14, 2009 at 09:27 from IEEE Xplore. Restrictions apply.

超宽带(UWB)滤波器的综合理论

with 1r ¼10.7,tan d 1¼0.0023at 10GHz,copper thickness d ¼0.018mm and substrate thickness UWB ?lter in theory,simulation and measurement In Fig.8,the comparison between the frequency response of the UWB ?lter and the FCC’s indoor /outdoor Figure 5Equivalent circuit for two-stage SIR UWB ?lters shown in Fig.1c

Figure 6Photograph of two-stage SIR-type UWB ?lter Figure 7Theoretical,simulation and experimental results insertion and return losses of the ?lter in Fig.6Figure 8Group delay and comparison of the insertion loss with FCC’s spectrum limits

IET Microw.Antennas Propag.,2008,Vol.2,No.8,pp.766–772771

doi:10.1049/iet-map:20070342

&

The Institution of Engineering and Technology 2008

http://www.77cn.com.cn

Authorized licensed use limited to: Kanagawa University. Downloaded on June 14, 2009 at 09:27 from IEEE Xplore. Restrictions apply.

超宽带(UWB)滤波器的综合理论

http://www.77cn.com.cn

772IET Microw.Antennas Propag.,2008,Vol.2,No.8,pp.766–772 &The Institution of Engineering and Technology2008doi:10.1049/iet-map:20070342

Authorized licensed use limited to: Kanagawa University. Downloaded on June 14, 2009 at 09:27 from IEEE Xplore. Restrictions apply.