Accession Number : AD0464375


Title :   A SERVO-CONTROLLED NULLING SYSTEM FOR REDUCING RADIO FREQUENCY INTERFERENCE


Corporate Author : OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS ANTENNA LAB


Personal Author(s) : Campbell, James T


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/464375.pdf


Report Date : 23 Aug 1963


Pagination or Media Count : 61


Abstract : Naval shipboard communication systems have always been afflicted with the problem of radio frequency interference between receivers and transmitters located on the same ship. A servo controlled nulling system is analyzed to determine its feasibility as a method of reducing radio frequency interference caused by nearby transmitters. Limitations on the practical form of the system are studied. Experimentation includes the measurement of null depths for low-level interfering signals.


Descriptors :   *COMMUNICATION AND RADIO SYSTEMS , PHASE DETECTORS , RADIO RECEIVERS , ERRORS , RADIOFREQUENCY INTERFERENCE , ENGINEERING DRAWINGS , SERVOMECHANISMS , MODULATORS , RADIO INTERFERENCE , RADIOFREQUENCY AMPLIFIERS , AMPLITUDE MODULATION , SHIP ANTENNAS , RADIOFREQUENCY POWER , VOLTAGE , REDUCTION


Subject Categories : Radio Communications


Distribution Statement : APPROVED FOR PUBLIC RELEASE