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| Number | Title | Issue Date |
| 6989789 | Method for locating radioelectric sources using two-channel high resolution radiogoniometer A process for locating radio sources by a two-channel high resolution radiogoniometer including a network of a specified number N of sensors. The process multiplexes the signals supplied by the N sensors on the inputs of only two receivers. Then, with the aid of a c... | 01/24/2006 |
| 6744407 | Method and device for space-time estimation of one or more transmitters Method and device for space-time estimation of one or more transmitters based on signals received using an antenna network. Signals received using the antenna network are separated in order to obtain signals s(t). Signals s(t) are grouped by transmitter, where the s... | 06/01/2004 |
| 6239746 | Radiogoniometry method and device co-operating in transmission A process and device related to multisensor radio direction finding receivers usable in radio communication systems including several emission sources. The process and device isolate the contribution of each emission source in sensor signals so as to perf... | 05/29/2001 |
| 5812092 | Radiocommunications and localizing device A radiocommunications and localization device of the type comprising an array of antennas coupled respectively to a goniometer device and a radio receiver delivering phonic signals to an operator respectively on two headphones. This device includes a devi... | 09/22/1998 |
| 5790075 | Beam antenna direction measuring method, direction measuring device and antenna direction controller In order to determine the direction of a beam antenna, at least one magnetic detection device is attached to the beam antenna for measuring at least one of the horizontal and vertical components of the geomagnetic field. Maximum and minimum geomagnetic fi... | 08/04/1998 |
| 5030959 | Enhanced automatic bearing indicator system An improved apparatus and method for radio direction finding is set forth, the generic function of which is that of an "automatic bearing indicator" (ABI). The technique and apparatus are intended for use in association with an antenna system which provid... | 07/09/1991 |
| 4654664 | Electronic null-seeking goniometer for ADF Described herein is a system providing an electronic null-seeking goniometer for use in automatic direction finding equipment. A microprocessor is used to generate sine and cosine information in response to the detected phase of the bearing signal. The mi... | 03/31/1987 |
| 4507663 | Automatic direction finder An automatic direction finder for automatically finding the arriving direction of electric waves by rotating a goniometer or the like with the use of a stepping motor is described. The stepping motor is controlled by means of a digital circuit using a rev... | 03/26/1985 |
| 4318106 | Direction finding system A variable aperture direction finding system which uses a circular array of vertical receiving antennas connected to a capacitive type goniometer located in the center of the array to receive signals from radio frequency transmission sources. The goniomet... | 03/02/1982 |
| 4306240 | Bearing measuring system for frequency modulation A bearing measuring system for determining the direction of arrival of a wave by rotating directional antennas or a goniometer to which the directional antennas are connected or rotating the directivity of such directional antennas or goniometer by electr... | 12/15/1981 |
| 4163978 | Radio direction finding An automatic radio direction finding method and apparatus which employs a scanning directional wide aperture aerial system, a receiver, and a computer which effectively simulates the methods of a skilled direction finding operator in determining the direc... | 08/07/1979 |
| 3995236 | Double sideband modulator A modulator employs a pair of variable RF attenuators to produce a double sideband, suppressed carrier output. The attenuator devices are PIN diodes which are rendered alternately conductive in synchronism with the recurring half cycles of the audio frequ... | 11/30/1976 |
