38results about How to "Beam width" patented technology

The invention discloses a multimode satellite navigation terminal antenna with broadband and circular polarization wide-beam, which is applied in places with higher demands on the properties of the broadband and the circular polarization. The multimode satellite navigation terminal antenna is composed of an antenna body and a feed network, wherein, the antenna body consists of a radome (1), a media support, a metallic radiating patch (2), four L-shaped metallic feed probes (3) and a metallic reflecting plate (4); the feed network consists of a four-way microstrip power-dividing phase shift network (5) and a metallic shielding box; the four L-shaped metallic feed probes (3) of the antenna body are electrically connected with the microstrip power-dividing phase shift network (5) of the feed network by metals. The multimode satellite navigation terminal antenna with broadband and circular polarization wide-beam leads the relative bandwidth of the microstrip antenna to reach a point above 40 percent. Meanwhile, since the microstrip antenna with nested media is adopted, the low-elevation gain of the microstrip antenna is greatly improved. With a 5-degree elevation angle gain larger than -5dBi, the multimode satellite navigation terminal antenna with broadband and circular polarization wide-beam is also provided with excellent mechanical characteristics and temperature characteristics.

Disclosed is a beam monitor system in which signals outputted from a plurality of wires are divided in a multi-wire type monitor for measuring a beam profile of a charged particle beam, an identical number of the wires are grouped, the signals of the respective groups are taken out one piece by one piece to be connected with each other, and the number of the pieces, corresponding to a number of the wires belonging to the one group, are put together to be connected to a signal processor storing connection information.

The invention discloses a wideband low sidelobe lens antenna based on novel artificial electromagnetic material. The antenna comprises a lens body with an axis in a same straight line, an impedance matching layer, and a feed source. A refractive index of the lens body shows gradient distribution along a radial direction, and a refractive index of the impedance matching layer shows uniform distribution along s axial direction. The lens body and the impedance matching layer are made from the novel artificial electromagnetic material. The new artificial electromagnetic material consists of basic units of periodic arrangements. In the invention, the wideband low sidelobe lens antenna based on the novel artificial electromagnetic material realizes, for a first time, simultaneously regulating an aperture field amplitude and phase distribution in a microwave band; a bandwidth of the lens antenna is quite wide; dispersion in a Ku band is not clear, and the performance is stable; the production is simple; the technology is mature; the price is not high; the promotion is easy; and structural parameters can be scaled to be suitable for different wave bands such as the microwave, millimeter wave and terahertz wave.