lens antenna मीनिंग इन हिंदी

उदाहरण वाक्य

1. Fresnel zone antennas belong to the category of reflector and lens antennas.
2. A Luneburg lens antenna offers a number of advantages over a parabolic dish.
3. A variation on the Luneburg lens antenna is the " hemispherical Luneburg lens antenna " or " Luneburg reflector antenna ".
4. A variation on the Luneburg lens antenna is the " hemispherical Luneburg lens antenna " or " Luneburg reflector antenna ".
5. Antenna-related research programs characterize antenna gain characteristics, develop phased array antenna concepts, and develop various kinds of reflector-type and lens antennas.
6. The formulae and algorithms for predicting the radiation pattern of an offset Fresnel lens antenna are presented in [ 4 ], where some experimental results are also reported.
7. Although a simple Fresnel lens antenna has low efficiency, it serves as a very attractive indoor candidate when a large window or an electrically transparent wall is available.
8. Unlike traditional reflector and lens antennas, however, the focusing effect in a Fresnel zone antenna is achieved by controlling the phase shifting property of the surface and allows for flat or arbitrary antenna shapes.
9. When used with a parabolic reflector or lens antenna, the phase center of the horn is usually placed at the mast from the center of the dish, or on tripod legs mounted to the edge of the dish.
10. The problem with dielectric based zoneplate lens antenna is that whilst a dielectric is providing a phase shift to the transmitted wave, it inevitably reflects some of the energy back, so the efficiency of such a lens is limited.