NDLI: Microstrip elliptic diplexer design by elliptic LPF and CQ BPF

Content Provider	IEEE Xplore Digital Library
Author	Yuying Yang Nakamura, M. Zhizhong Wang
Copyright Year	2004
Description	Author affiliation: Shanghai Jiao Tong Univ., China (Yuying Yang)
Abstract	To exploit the frequency band of 870-1200MHz as the extended upstream for CATV, extension amplifier is the main part of the system. To realize it, developing mass production suitable diplexer with very sharp skirt on both low-pass and high-pass sides is the key point microstrip diplexer is chosen to meet this challenge. Elliptic LPF by quasi-lumped components and CQ BPF by open-loop resonators are designed to get a cutoff edge with enough selectivity separately. Then diplexer is obtained by connecting the BPF to the LPF by coupled feedline with a suitable length, inside which both of BPF and LPF maintain their performances without any appreciable decrease. Both of the extension amplifier and the extension system by this diplexer are tested. Experiment results show that the developed extension amplifier is able to make use of the frequency band between 865MHz and 1155MHz to transmit 16QAM and 64QAM at 5 Msymbol/sec in high waveform quality without any noticeable effect on the conventional upstream and downstream.
Starting Page	390
Ending Page	393
File Size	294353
Page Count	4
File Format	PDF
ISBN	0780384016
DOI	10.1109/ICMMT.2004.1411548
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-08-18
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Band pass filters Capacitors Microstrip filters Attenuation measurement Loss measurement Cutoff frequency Inductors Frequency measurement Spectral analysis Impedance
Content Type	Text
Resource Type	Article

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