A Gain-Bandwidth Limitation for Parametric Amplifiers with n-Varactor Diodes

Author

Ku, Walter H.

Volume

Issue

fYear

1966

fDate

3/1/1966 12:00:00 AM

Firstpage

Lastpage

Abstract

A gain-bandwidth limitation is derived in this paper for parametric amplifiers incorporating an arbitrary number of varactor diodes. For $n$ varactors with parameters $C_{0\\tau }$ , and $C_{1\\tau },\\tau = 1,2,\\cdots ,n$ , the optimum gain-bandwidth limitation is given by $(G_{T})_{n}\\leq \\cosh ^{2}[frac{\\pi\\sqrt {\\omega _{s0}\\omega _{i0}}} {\\omega _0} Sum_{r=1}^{n} frac {C_{1\\tau }} {C_{0\\tau }}]$ , where $(G_{T})_{n}$ - is the maximum flat transducer power gain, $\\omega _{c}$ is the equivalent low-pass bandwidth, and $\\omega _{s0}$ and $\\omega _{i0}$ are the signal and idler band-center frequencies, respectively. This result is based on the three-frequency model for the varactor device and is essentially a generalization of the gain-bandwidth limitation for single-varactor parametric amplifiers published recently by the author [2].

Keywords

Bandwidth; Broadband amplifiers; Capacitors; Chromium; Coupling circuits; Diodes; Frequency; Optical wavelength conversion; Transducers; Varactors;

fLanguage

English

Journal_Title

Circuit Theory, IEEE Transactions on

Publisher

ieee

ISSN

0018-9324

Type

jour

DOI

10.1109/TCT.1966.1082553

Filename

1082553

Link To Document

https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1161534