Instrumental Errors of a Four-Channel Crystal-Video Direction Finder.

摘要

The instrumental bearing error characteristics of a four-channel, crystal-video direction finder have been measured over the frequency range of 2800 Mc. to 6000 Mc. These measured bearing errors are presented here along with a discussion and analysis of the various first-and second-order factors that cause this error. The instrumental bearing error is found to be approximately the summation of antenna pattern shape error and gain mismatch error. The techniques utilized in this development result in an instrumental error which does not exceed plus or minus 7.5 degrees and this is less than has been obtained previously with similar four-channel systems.