THE LAW OF THE MIXER: THE MUTUAL INTERFERENCE CHART FOR PROBLEMS OF FREQUENCY ASSIGNMENTS AND ITS APPROXIMATION,
Abstract
The mutual interference chart defined by the formula for the spurious frequencies resulting from the mixing process is interpreted in terms of analytic geometry. The spurious frequencies formula and the chart derived from it do not take complete account of the physics of the mixing process, that is, they do not take cognizance of the effect of the impedances of the circuit and nonlinearities of the mixer on the amplitude of the input waves. When this is done, the number of lines of the MIC is radically reduced. The procedure for constructing the reduced or practical chart on the basis of the derived relation, the analytic character of the general chart lines, the quality of service desired, and experimental data is briefly outlined. The reduced chart is far simpler than that predicted by conventional theory and becomes even simpler as the frequency increases. There is also an approximation to it consisting solely of a diagonal swath. Some shortcomings of available data and of the experimental approach are indicated, together with possible remedies suggested by the theory. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1963
- Accession Number
- AD0610008
Entities
People
- Nello R. Castellini
Organizations
- United States Army Communications-Electronics Command