Cart (Loading....) | Create Account
Close category search window
 

Conversion Loss of Diode Mixers Having Image-Frequency Impedance

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Herold, E.W. ; R.C.A. Laboratories, Radio Corporation of America, Princeton, N.J. ; Bush, R.R. ; Ferris, W.R.

The theory of the two-electrode nonlinear mixer for superheterodyne use is developed so as to include the effect of resistive impedance at image frequency. The general theory is applied to the calculation of conversion loss under optimum conditions of matching the intermediate-frequency circuit to the mixer stage. Even when the intermediate-frequency circuit is not matched to the mixer, this matched-impedance conversion loss is important in the determination of the over-all signal-to-noise ratio of a receiver. This loss is computed for an idealized diode with different operating conditions, for various values of image-frequency impedance, and for different values of radio-frequency circuit losses. Although the chief effect of different image-frequency impedances is a change in the optimum operating conditions and in the required local-oscillator power, there is also an effect on the minimum conversion loss. Very low impedances or very high impedances result in smallest conversion loss. The impedances often encountered at ultra-high frequency (image-frequency impedance approximately the same as signal-frequency impedance) result in an increase in conversion loss which may be between 0 and 3 decibels, depending on the circuit losses.

Published in:

Proceedings of the IRE  (Volume:33 ,  Issue: 9 )

Date of Publication:

Sept. 1945

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.