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Showing papers on "Active antenna published in 1983"


Patent
28 Jan 1983
TL;DR: An active antenna system for an airborne high frequency single sideband receiver comprised of a shorted loop type antenna having an inductive characteristic over the frequency range of 2.0 to 10.0 MHz is presented in this paper.
Abstract: An active antenna system for an airborne high frequency single sideband receiver comprised of a shorted loop type antenna having an inductive characteristic over the frequency range of 2.0 to 10.0 MHz and which is tuned to resonance at a selected operating frequency by shunting the antenna at its feedpoint by selectively switched sets of voltage variable capacitors. Also coupled to the feedpoint is a field effect transistor which is adapted to provide radio frequency amplification. Impedance matching between the output of the field effect transistor and the input of a radio frequency receiver is further provided by a transistor configured as an emitter follower.

14 citations


Patent
16 Sep 1983
TL;DR: In this article, the authors propose a connector consisting of a plug with the antenna which can be plugged into a base and two coaxial cylindrical conductors to ensure transmission of the preamplified signal and earth connection respectively.
Abstract: The device makes it possible to ensure, simultaneously and in a separable manner, the mechanical fixing of the antenna casing 14, 15 onto the bodywork 30 of the vehicle and the electrical linking of the circuit 16 to the receiver and to the battery which are situated inside the vehicle. To do this, the device comprises a connector formed of a plug 11, 12, 13 rigid with the antenna which can be plugged into a base 21, 22, 23 permanently fixed to the electrical supply; two coaxial cylindrical conductors 12, 22; 13, 23 ensure transmission of the preamplified signal and earth connection respectively.

6 citations


Proceedings ArticleDOI
H.C. Johnson, M. Oz, R.E. Marx, J. Rosen, E. Mykietyn 
01 Jan 1983
TL;DR: A planar active antenna array design combines miniature beryllia amplifiers using batch process techniques with an open-celled microstrip antenna was developed and tested in this paper, which is a thin, very light active antenna subarray using these technologies.
Abstract: A planar active antenna array design combines miniature beryllia amplifiers using batch process techniques with an open-celled microstrip antenna. A thin, very light active antenna subarray using these technologies has been developed and tested.

4 citations


Patent
05 Mar 1983
TL;DR: In this paper, the authors propose to change a monopulse antenna into a multibeam and interference eliminating antenna by disposing a transmission/reception separating circuit between monopulse synthesizers, providing a switching device for three terminals of the output of synthesizers and controlling the switching device and a phase shifter.
Abstract: PURPOSE:To change a monopulse antenna into a multibeam and interference eliminating antenna, by disposing a transmission/reception separating circuit between monopulse synthesizers, providing a switching device for three terminals of the output of synthesizers and controlling the switching device and a phase shifter. CONSTITUTION:Transmission/reception separating circuits 61-64 consisting respectively of switching devices 121-124 and phase shifters 131-134 and two pairs of circulators 71, 75; 72, 76; 73, 77 and 74, 78 are provided between monopulse synthesizers consisting of feeder circuits 51-54 of a monopulse system electronic controlled antenna to a plurality of active antenna elements 81-8n, 91-9n, 101-10n and 111-11n, and hybrids 2-4, 15, and the three terminals of the output of the monopulse synthesizers are provided with switching devices 141-143 to control the switching devices 141-143 and the phase shifters 131- 134. Thus, an electronic controlled antenna in which the monopulse antenna can be changed easily into a multibeam antenna and interference wave eliminating antenna can be obtained.

2 citations