Showing papers on "Active antenna published in 1976"
01 Oct 1976
TL;DR: In this article, the authors present a forum for the presentation of new ideas for improving antenna performance and discuss the capabilities, fundamental limitations, and design trade-offs of electrically small antennas.
Abstract: : Antennas to be used for communication in Army tactical situations have to satisfy the requirements of low visibility and low vulnerability. At wavelengths in the HF and VHF ranges--the frequency bands commonly used for tactical radio communications--these constraints require the use of electrically small antennas. As is well known, the design of such antennas requires sophistication if acceptable electrical performance is to be achieved. The purpose of the Workshop was to bring together antenna scientists from universities, industries, and government laboratories to discuss the capabilities, fundamental limitations, and design trade-offs of electrically small antennas, and to provide a forum for the presentation of new ideas for improving antenna performance. Special attention has been given to active antenna techniques, which up to now have not been used by the Army to a large extent, and to the problem of controlling or utilizing the interaction of electrically small antennas with complex platform environments such as provided by tanks, helicopters, and manpack sets.
11 citations
Patent•
06 Dec 1976
TL;DR: In this paper, an electronic clock, such as a quartz-crystal clock, is tested and may be adjusted by measuring the oscillation frequency of the clock with an active antenna.
Abstract: An electronic clock, such as a quartz-crystal clock, is tested and may be adjusted by measuring the oscillation frequency of the clock with an active antenna. The oscillation frequency is electrically compared with a reference frequency to determine deviation and provide an output indication. Internal calibration is carried out when the system is not being used for testing.
5 citations
01 Oct 1976
TL;DR: In this paper, the authors describe the design and testing of a broadband active thick-folded-dipole, used for reception, between 0.4 and 1 GHz, which exibits a good sensitivity.
Abstract: This paper describes the design and testing of a broadband active thick-folded-dipole, used for reception, between 0.4 and 1 GHz. This active antenna which exibits a good sensitivity can be used as an element of a directive array without a loss of bandwidth and sensitivity. For example an array of two active folded-dipoles in front of a reflector plane gives directivity about 10 dB upon an isotropic source between 0.4 and 1 GHz, and a better sensitivity than the isolated active antenna.