Some fundamental and practical limits on broadband matching to capacitive devices, and the implications for SIS mixer design
Some fundamental and practical limits on broadband matching to capacitive devices, and the implications for SIS mixer design
复制标题
电容设备宽带匹配的一些基本和实际限制，以及对 SIS 混频器设计的影响
DOI：
--
复制
发表时间：
1995
期刊：
影响因子：
--
通讯作者：
A. Kerr
中科院分区：
文献类型：
--
作者：
A. Kerr
在给定的频段内，电容微波或毫米波器件与电阻源之间的可实现匹配受到器件的电容及其串联电感的限制。对三种电路的匹配带宽的基本限制进行了检查：1)并联RC， 2)并联RC与串联L，以及3)并联RCL与串联L。使用了Bode（1945）和Fano（1950）的宽带匹配理论，后者经过修改以避免在情况2)中标准的低通到带通映射，因为电容的端子通常无法连接所需的并联电感器。研究结果对使用肖特基二极管或SIS结设计宽带混频器、乘法器、开关和检测器具有重要意义。以具有串联结阵列的SIS混频器为例，讨论了标准光刻技术制造的毫米波集成电路的最小可实现尺寸所带来的实际限制，并给出了共面SIS混频器设计的一个例子。对于具有给定总电阻的N个器件的串联阵列，表明存在N的上限，在此上限下，理论匹配带宽仅取决于器件的RC积，而不取决于阵列的串联电感。>
In a given frequency band, the achievable match between a capacitive microwave or millimeter-wave device and a resistive source is limited by the capacitance of the device and its series inductance. The fundamental limit on the match bandwidth is examined for three circuits: 1) parallel RC, 2) parallel RC with series L, and 3) parallel RCL with series L. The broadband matching theories of Bode (1945) and Fano (1950) are used, the latter modified to avoid the standard low-pass to band-pass mapping in case 2) because the terminals of the capacitance are not generally accessible for connection of the requisite parallel inductor. The results are fundamental to the design of broadband mixers, multipliers, switches, and detectors using Schottky diodes or SIS junctions. Practical limitations imposed by the minimum realizable dimensions of millimeter-wave integrated circuits fabricated by standard photolithography are discussed in the context of SIS mixers with series arrays of junctions, and an example of a coplanar SIS mixer design is given. For a series array of N devices with a given total resistance, it is shown that there is an upper limit to N, below which the theoretical match bandwidth depends only on the RC product of the devices and not on the series inductance of the array. >