The invention relates to a sensor comprising a housing, inside of which a transmitting antenna array that transmits electromagnetic transmission signals in a radiation area and a receiving antenna array that receives received signals reflected by at least one object located within the radiation area are provided. The inventive sensor is designed in such a manner that the transmitting antenna array is provided for transmitting transmission signals in a main radiation area (3) and in a secondary radiation area (4) situated at an angle thereto, and in that the receiving antenna array (TX) is provided for receiving received signals reflected in both radiation areas (3, 4). This makes it possible, for example when used in a motor vehicle (5), to monitor the area behind and next to the motor vehicle (5) with a single transmitting antenna (1).

Sensor for transmitting and receiving electromagnetic signals

A dielectric material is formed into a structure having two parallel broad surfaces with one or more raised integral portions extending transversely across at least one of the broad surfaces. The exterior is uniformly conductively coated (12, 13) resulting in a parallel plate waveguide (10) having a continuous transverse stub element (11) disposed adjacent one plate (13) thereof. Purely reactive elements are formed by leaving the conductive coating on the terminus of the stub element, or by narrowing the terminus of the stub element. Radiating elements (15) are formed when stub elements (11) of moderate height h are opened to free space. Radiating, coupling and/or reactive continuous transverse stub elements may be combined in a common parallel plate structure in order to form a variety of microwave, millimeter wave and quasi-optical components including integrated filters, couplers and antenna arrays. Fabrication of the dielectrically-loaded continuous transverse stub element can be efficiently accomplished by machining, extruding or molding the dielectric structure, followed by uniform conductive plating in order to form the parallel plate transmission line. In the case of antenna applications, machining or grinding is performed on the stub terminus to expose the dielectric material at the end of the stub element.

Continuous traverse stub element devices and method for making same

The invention discloses a microwave energy transmission system suitable for moving targets and a simulation method, which are used for realizing non-Gaussian distribution emission waveform-flat beam as the transmit aperture level of the microwave wireless energy transmission system In order to achieve the above object, the microwave energy transmission system adopts a transmitting module and a receiving module including a distributed antenna array, realizes multi-frequency multi-point-to-multi-point microwave wireless energy transmission, has no limitation on high power and is more flexible in application The microwave energy transmission system adopts a flat beam with a non-Gaussian distribution waveform waveform-flat beam as a transmitting aperture level, so that the uniformly distributed power density can be obtained on the receiving front surface, the power capacity of the rectifying diodes is the same, and the rectifying antenna can be uniformly designed, thereby reducing the design difficulty At the same time, the uniformly distributed power density can improve the conversion efficiency of the rectifier antenna, and thus enhance the efficiency of the whole system In addition, the design can also solve the problem that the traditional Gaussian distribution waveform burns down the rectifier antenna because of the focus point deviation caused by the target movement

A microwave energy transmission system suitable for moving targets and a simulation method thereof

The radar system is mounted on a pillar and emits beams to measure the speed of a vehicle (FZ) and also to provide identification. The radar scanner has a primary emitter (PS) with a parabolic reflector (RE) for producing a fairly flat beam (SV) via a part transmitting plate (TE). A further reflector (UR) aids in the generator of a rear, vertically-directed beam (SK) that provides identification of the vehicle. The flat beam is used to measure speed.

Radar antenna with at least one primary radiator and a parabolic reflector for a traffic radar system in traffic-metering

The invention relates to a directional microwave antenna. For generating a lobe of oval cross-section, of high directionality with a sector shape in all the longitudinal sections, a reflector with an oval aperture and a built-in exciter, which is not rotationally symmetrical, are used, which exciter is designed as a dielectric tubular emitter and which radiates predominantly with an approximately oval annular zone. The dielectric emitter consists of a wave guide (9), of circular or oval cross-section, which is provided, for example in the magnetic plane, with two slots (10), located opposite one another, and has a dielectric, circular or oval tube (13) mounted on its inner wall, which projects beyond the wave guide opening (12) and covers the wave guide slots (10).

Directional microwave antenna to realize a sector-shaped lobe

The radar system includes a directional antenna rotating in the azimuth (phi). An image of the radar scene is obtained from a reception signal, and the complex amplitude of the reception signal is composed of the effective complex radiation characteristic of the directional antenna and a reflectivity function. An estimation of the reflectivity function is obtained by filtering the effective complex radiation characteristic or by another linear approximation method, e.g. the so-called linear expectation optimal estimation method or the so-called Wiener estimation method. The latter estimation method is known from the channel estimation using test signals.

Radar system with rotating directional antenna

Radarsystem Radar system

The antenna is designed as a reflector antenna having a double-curved reflector and a double-exciter supply, the reflector surface being especially shaped in two planes in order to produce sum and difference characteristics, and in consequence making possible a special direction-finding behaviour. The illumination region, which is limited in a rectangular manner, requires a beam cross-section which is like a trapezoid in the sum characteristic. The special direction-finding behaviour is defined in that azimuth direction finding is possible within this illumination region using the amplitude or phase monopulse method. An antenna which is constructed according to the invention can advantageously be used in the case of a traffic-control radar, in movement signalling devices or, completely generally, for surveillance of an area.

Gerhard Dipl.-Ing. Schindler

Papers

Radar antenna with at least one primary radiator and a parabolic reflector for a traffic radar system in traffic-metering

Directional microwave antenna to realize a sector-shaped lobe

Radar system with rotating directional antenna

Radarsystem Radar system

Antenna for radar surveillance.