Accession Number : AD0475588


Title :   INTERFERENCE REDUCTION TECHNIQUES FOR RECEIVERS.


Descriptive Note : Quarterly rept. no. 6, 1 Jan-31 Mar 65,


Corporate Author : RADIO CORP OF AMERICA NEW YORK DEFENSE ELECTRONIC PRODUCTS


Personal Author(s) : Bossard, B ; Torrione, P ; Pan, W Y ; Perlow, S ; Ernst, R


Report Date : 30 Apr 1965


Pagination or Media Count : 95


Abstract : The purposes of this program are: To investigate the basic design of the over-all radio receiver operating in the frequency range of 8,500 to 10,000 mc and to determine its characteristics from an interference susceptibility and interference producing standpoint, and to develop techniques and formulate recommendations which will reduce both the receiver susceptibility to interference and spurious signals. A theory is developed which relates the diode exponent, the local oscillator power, and the percent intermodulation distortion to a quantity called P sub om, the maximum output power available from a resistive mixer. Equations relating the three parameters to P sub om and for determining P sub om are developed. There is a discussion and analysis of the fractional image spuria. These spuria are the most important and most troublesome in a frequency converter in the X-Band region. A theoretical analysis is developed to predict the magnitudes of these responses. A study was made of the Hall effect and its possible use as a frequency converter with low noise and gain. Equations are derived for the maximum gain in both modes of operation (magnetically coupled pump or signal). Intermodulation distortion measurements have been performed and presented, and a theoretical explanation of the trends is presented. (Author)


Descriptors :   *RADIO INTERFERENCE , *RADIO RECEIVERS , PARAMETRIC AMPLIFIERS , MAGNETIC FIELDS , REDUCTION , SUPERHIGH FREQUENCY , VULNERABILITY , X BAND , DISTORTION , MIXERS(ELECTRONICS) , FREQUENCY CONVERTERS , HALL EFFECT , GAIN , RADIOFREQUENCY POWER , OSCILLATORS , MATHEMATICAL ANALYSIS , TUNNEL DIODES , SEMICONDUCTOR DIODES , INFORMATION THEORY , EQUATIONS , RESONANCE , NOISE(RADIO) , TAYLORS SERIES , CRYSTAL MIXERS , SERIES(MATHEMATICS) , IMPEDANCE MATCHING , MASERS , PUMPING(ELECTRONICS)


Subject Categories : Radio Communications


Distribution Statement : APPROVED FOR PUBLIC RELEASE