A compact quadrature hybrid based on high-pass and low-pass lumped elements

被引：45

作者：

Hou, Jian-An ^{[1
]}

Wang, Yeong-Her ^{[1
]}

机构：

[1] Natl Cheng Kung Univ, Adv Optoelect Technol Ctr, Dept Elect Engn, Inst Microelect, Tainan 70101, Taiwan

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2007年 / 17卷 / 08期

关键词：

lumped element; monolithic microwave integrated circuit (MMIC); quadrature hybrid;

D O I：

10.1109/LMWC.2007.901775

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this letter, a novel compact quadrature hybrid using low-pass and high-pass lumped elements is proposed. This proposed topology enables significant circuit size reduction in comparison with former approaches applying microstrip branch line or Lange couplers. In addition, it provides wider bandwidth in terms of operational frequency, and provides more convenience to the monolithic microwave integrated circuit layout since it does not have any bulky via holes as compared to those with lumped elements that have been published. In addition, the simulation and measurement of the fabricated hybrid implemented using PHEMT processes are evidently good. With the operational bandwidth ranging from 25 to 30 GHz, the measured results of the return loss are better than 17.6 dB, and the insertion losses of coupled and direct ports are approximately 3.4 +/- 0.7 dB, while the relative phase difference is approximately 92.3 +/- 1.4 degrees. The core dimension of the circuit is 0.4 mm * 0.15 mm.

引用

页码：595 / 597

页数：3

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