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Lumped-element structures of basic microwave components for large-scale MMIC applications

用于大规模 MMIC 应用的基本微波元件的集总元件结构

基本信息

批准号：
10650376
负责人：
OHTA Isao
金额：
$ 2.24万
依托单位：
Himeji Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

项目摘要

1. Quadrature and 180-degree 3 dB hybrids(1) The research presents a systematic design concept based on the invariant and the equivalent admittance for lossless reciprocal 4-port circuits with double or single reflection symmetry.(2) The research derives the frequency characteristics of various hybrids consisting of unbalanced or balanced line LC circuits analytically. Generally, balanced line hybrids exhibit a broader-band property, and the bandwidth of a quadrature hybrid is twice as wide as that of an unbalanced line hybrid. Additionally, a balanced line 180-degree hybrid possesses a wide bandwidth ratio of 3.2. The effect of conductor loss in inductors also is examined.(3) A new broadband 180-degree hybrid with a phase inverter is proposed. The frequency dependencies are calculated with consideration for the loss of inductors.(4) An exceedingly miniaturized semi-lumped-element hybrid ring with a considerably broad bandwidth is newly proposed using a phase inverter and shunt capacitors added at each port.(5) The above hybrids are virtually realized on a GaAs substrate, and the validity of the design technique is demonstrated by an electromagnetic simulator (Sonnet).(6) Experimental confirmation is shown for a broadened quadrature hybrid.2. Eight-port hybrids(1) Various structures are proposed by appropriately connecting four quadrature hybrids, and two typed with a broad bandwidth are elaborated.(2) A band-broadening technique is described.3. Wilkinson power divider(1) The frequency characteristics of a lumped-element construction are derived analytically.(2) The layout and its frequency properties are shown by and electromagnetic simulator.4. Future subjects(1) Development of a new multi-port power divider and N-way Wilkinson power divider.(2) Investigation on decrease of the conductor loss.(3) Development of functional devices such as a variable attenuator and a phase shifter.

1.正交和180度3dB混合电路（1）提出了基于不变量和等效导纳的双反射对称或单反射对称无损耗互易四端口电路的系统设计思想。(2)本文对由不平衡或平衡线性LC电路组成的各种混合电路的频率特性进行了解析推导。通常，平衡线路混合电路表现出更宽的频带特性，并且正交混合电路的带宽是不平衡线路混合电路的带宽的两倍。此外，平衡线路180度混合电路具有3.2的宽带宽比。电感器中的导体损耗的影响也被检查。(3)提出了一种新的带反相器的宽带180 °混合电路。频率依赖性的计算与考虑电感器的损失。(4)本文提出了一种利用反相器和并联电容构成的超小型化半集总元件混合环，它具有相当宽的带宽。(5)在GaAs衬底上实现了上述混合电路，并通过电磁仿真器（Sonnet）验证了设计技术的有效性。(6)实验确认显示为一个扩大的正交混合。八端口混合电路（1）通过四个正交混合电路的适当连接，提出了各种结构，并详细介绍了两种宽带的八端口混合电路。(2)介绍了一种带展宽技术.威尔金森功分器（1）分析了集总元件结构的频率特性。(2)通过电磁仿真，给出了其布局和频率特性.未来的研究课题：（1）新型多端口功分器和N路威尔金森功分器的研制。(2)降低导体损耗的研究。(3)开发可变衰减器、移相器等功能器件。