Details

Autor(en) / Beteiligte

• Dai, Xinyue
• Sun, Tingting
• Wu, Wenxuan
• Wang, Zhen
• Shi, Guanghua
• Yang, Qian
• Guo, Cheng
• Zhang, Anxue

Titel

A 0.22–26.5-GHz Ultra-Wideband Directional Coupler Based on Copper Additive Manufacturing

Ist Teil von

• IEEE transactions on circuits and systems. II, Express briefs, 2023-08, Vol.70 (8), p.2869-2873

Ort / Verlag

New York: The Institute of Electrical and Electronics Engineers, Inc. (IEEE)

Erscheinungsjahr

2023

Quelle

IEEE

Beschreibungen/Notizen

• This brief presents a compact (5mm[Formula Omitted]mm) and ultra-wideband directional coupler fabricated by copper additive manufacturing. The coupler is directly synthesized through the even/odd mode extraction algorithm and realized from a pair of coupled air-filled rectangular coaxial lines with working frequency of 0.22-26.5GHz (usable to 10MHz). Periodically loaded polymer strips are embedded with the air-filled coaxial lines to support the inner conductor but this strips also deteriorate the directivity of the coupler. To alleviate this, a special arrangement of the polymer strips is proposed to decrease the unwanted coupling through the strips. As an example, a 27 [Formula Omitted]-order coupler is designed and fabricated, the simulated and measured results have good agreement, showing 20dB of return loss (RL) at all ports, 17dB of coupling, 120 times of frequency ratio and 10-20dB of directivity.