IEICE Transactions on Electronics
Online ISSN : 1745-1353
Print ISSN : 0916-8524
Design of Diplexer using Surface Acoustic Wave and Multilayer Ceramic Filters with Controllable Transmission Zero
Shinpei OSHIMAHiroto MARUYAMA
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ジャーナル 認証あり 早期公開

論文ID: 2020ECP5033

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In this paper, we propose a design method for a diplexer using a surface acoustic wave (SAW) filter, a multilayer ceramic filter, chip inductors, and chip capacitors. A controllable transmission zero can be created in the stopband by designing matching circuits based on the out-of-band characteristics of the SAW filter using this method. The proposed method can achieve good attenuation performance and a compact size because it does not use an additional resonator for creating the controllable transmission zero and the matching circuits are composed of only five components. A diplexer is designed for 2.4 GHz wireless systems and a global positioning system receiver using the proposed method. It is compact (8.0 mm × 8.0 mm), and the measurement results indicate good attenuation performance with the controllable transmission zero.

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© 2021 The Institute of Electronics, Information and Communication Engineers
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