Compact High-Isolation Base-Station Duplexer Using Triple-Mode Ceramic Cavities

被引：25

作者：

Hendry, David R. ^{[1
,2
]}

Abbosh, Amin M. ^{[1
]}

机构：

[1] Univ Queensland, Sch Informat Technol & Elect Engn, Brisbane, Qld 4072, Australia

[2] Bell Labs Nokia, Murray Hill, NJ 07974 USA

来源：

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2018年 / 65卷 / 10期

关键词：

Cavity filter; duplexer; triple-mode filter; DIPLEXER; RESONATORS;

D O I：

10.1109/TIE.2018.2803718

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

A microwave duplexer with high isolation is presented in this paper. The device is based on triple-mode filters that are built using silver-plated ceramic cuboids. To create a six-pole, six-transmission-zero filter in the DCS-1800 band, which is utilized in mobile communications, two cuboids are cascaded. To shift spurious harmonics, low dielectric caps are placed on the cuboid faces. These caps push the first cuboid spurious up in frequency by around 340 MHz compared to the uncapped cuboid, allowing a 700-MHz spurious free window. To verify the design, a DCS-1800 duplexer with 75-MHz widebands is built. It achieves around 1 dB of insertion loss for both the receive and transmit ports with around 70 dB of mutual isolation within only 20-MHz band separation, using a volume of only 30 cm(3).

引用

页码：8092 / 8100

页数：9

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