IEICE Transactions on Electronics
Online ISSN : 1745-1353
Print ISSN : 0916-8524
Special Section on Microwave and Millimeter-Wave Technologies
300-GHz-Band Diplexer for Frequency-Division Multiplexed Wireless Communication
Yuma KAWAMOTO, Toki YOSHIOKA, Norihiko SHIBATA, Daniel HEADLAND, Masayuki FUJITA, Ryo KOMA, Ryo IGARASHI, Kazutaka HARA, Jun-ichi KANI, Tadao NAGATSUMA
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Keywords: diplexer, frequency-division multiplexing, silicon waveguides, terahertz, wireless communications
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2023 Volume E106.C Issue 11 Pages 722-726

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Abstract

We propose a novel silicon diplexer integrated with filters for frequency-division multiplexing in the 300-GHz band. The diplexer consists of a directional coupler formed of unclad silicon wires, a photonic bandgap-based low-pass filter, and a high-pass filter based on frequency-dependent bending loss. These integrated filters are capable of suppressing crosstalk and providing >15dB isolation over 40GHz, which is highly beneficial for terahertz-range wireless communications applications. We have used this diplexer in a simultaneous error-free wireless transmission of 300-GHz and 335-GHz channels at the aggregate data rate of 36Gbit/s.

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© 2023 The Institute of Electronics, Information and Communication Engineers
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