Accession Number : ADD015989

Title :   Very Low Frequency and Low Frequency Transmitting Antenna Parameter Monitoring System.

Descriptive Note : Patent, Filed 11 Jun 91, patented 3 Aug 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Tietsworth, Steven C

Report Date : 03 Aug 1993

Pagination or Media Count : 40

Abstract : A very low frequency and low frequency transmitting antenna parameter monitoring system is used to measure the electric circuit parameters in near real time of very low frequency and low frequency transmitting antenna systems transmitting frequency shift keyed modulation. The primary parameters measured by the system are the antenna feed-point voltage, antenna current, gross resistance, gross reactance and steady-state phase angle between the voltage and current. Four primary sections provide for antenna system sensing by sensors, triggering, analog-to-digital conversion of the sensor outputs and computer processing of the digital data to arrive at the desired antenna parameters. These parameters are essential in evaluating antenna performance and in diagnosing problems with the antenna system.

Descriptors :   *ANTENNA CONFIGURATIONS, *COMPUTER PROGRAM DOCUMENTATION, *PATENTS, *FREQUENCY SHIFT KEYERS, ANALOGS, ANGLES, ANTENNA FEEDS, ANTENNAS, CIRCUITS, COMPUTERS, CONVERSION, FREQUENCY, FREQUENCY SHIFT, LOW FREQUENCY, MODULATION, MONITORING, OUTPUT, PARAMETERS, PHASE, REACTANCE, REAL TIME, RESISTANCE, STEADY STATE, TRANSMITTING, VERY LOW FREQUENCY, VOLTAGE

Subject Categories : Electrical and Electronic Equipment
      Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE