By Topic

Image Frequency Rejection in a Radio Direction Finder

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
$33 $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

1 Author(s)
D. W. Fife ; Cooley Electronics Laboratory, The University of Michigan, Ann Arbor, Mich.

An analysis is given of the bearing error in a radio direction finder due to simultaneous reception of two signals, referred to as target and spurious signals. The carrier frequency of the spurious signal is assumed to be the image of the target-signal frequency around the local-oscillator frequency, so that both signals are passed by the IF amplifier of the direction-finder receiver. The analysis applies to any DF receiver having a carrier-suppressed double-sideband input, such as is obtained using a mechanical or electronic goniometer. The results can serve as a basis for specifying the image rejection requirements on the RF amplifier of the receiver. In particular, it is shown that in order to have less than one degree of error, the spurious signal must be attenuated to at least 35 db below the target signal amplitude at the RF output of the receiver.

Published in:

IEEE Transactions on Aerospace and Navigational Electronics  (Volume:ANE-10 ,  Issue: 2 )