A study of radio frequency converters and mixers

This thesis will present a detailed discussion of the principles of frequency conversion and the problems attendant to the design of converter stages. The topic of harmonic conversion has been singled out for a more extended treatment than is now available in the literature. This topic is the subject of the experimental investigation portion of this thesis. Harmonic conversion has applications in U-H-F receivers as well as in Double Superheterodyne Receivers . The discussion given to the frequency converter in the first section of this thesis will be without regard to any applications. General theory will be stressed, and most of the difficulties involved in successful converter circuit design will be discussed in some detail. A detailed analytical study of possible harmonic conversion circuits is included in the second major section of this thesis. Some of the analytical developments of this section are subsequently verified by experimental study. The third topical division is the presentation of the results of the experimental study on various harmonic conversion circuits, including a new circuit developed by the author --Introduction, page 5