7,040 research outputs found
A thirty-six element array antenna system
Thirty-six element square array, with mutual coupling between crossed slots for array elements, is used as an electronically scanned tracking antenna. The system does not require the movement of the antenna or the presence of an operator
Evaluation of data obtained from a 35 GHz propagation experiment Technical report no. 7
Effect of atmospheric humidity, pressure, and temperature on electromagnetic wave propagatio
Improved VHF direction finding system
Direction finding device operating at very high frequencies requires a loop antenna, mechanical rotation, and large structures. The system is applicable to an unmanned configuration. Direction information is extracted in the form of a direction cosine analog
Analysis and optimization of an omnidirectional direction-finding system
System determines the direction of arrival of an electromagnetic wave with the direction information in a readily usable form. It presents a relatively small physical structure and does not require mechanical positioning
A study of antenna and radio frequency tracking system Final summary report, 1 Feb. 1963 - 30 Nov. 1965
Phase stability of very low frequency radio signal propagation, electronically scanned tracking antenna array, and inverted rf tracking syste
Investigation of design of high voltage, high current solid state switching devices Final technical report
High voltage, high current switching devices using semiconductor controlled rectifier
An investigation of the design criterion for a phase stability study system of VLF PROPAGATION over short distances Technical report no. 9
System for measuring phase stability of very low frequency signal propagated over short distance
Television broadcast satellite systems, volume 1
Empirical expressions are derived to account for various components of the television satellite broadcast system. Computer programs are developed to determine the system weight in any general design. The factors of picture quality, propagation losses, and RF power requirements are discussed and determined
A phase stability study system for VLF propagation over short distances
Engineering design of transponder system for phase measurement of very low frequency signal
Analysis and optimization of an omni-directional direction finding system
Analysis and optimization of omnidirectional direction finding syste
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