PHASE SYNTHESIS OF BEAM-SCANNING REFLECTARRAY ANTENNA BASED ON DEEP LEARNING TECHNIQUE

Study of Different Dual-Reflectarray Antenna Configurations for Beam-Scanning Applications

Dual-reflectarray configurations exhibits some advantages from both mechanical and electrical points of view with respect to reflector antennas. Dual-reflectarray antennas present a reduced volume and the capability of being easily folded. Furthermore, these antenna configurations provide phase control on both reflectarray surfaces [1], which can be used to improve the antenna performance for m...

Design of a Bifocal Single Reflectarray Antenna with Improving Beam Scanning Performance

A novel scheme is introduced to design the high gain beam scanning reflectarray antennas for limited scan range application. At first, various existing schemes for beam scanning reflectarray antennas design are reviewed and it is concluded that as a convenient design scheme, the feed displacement technique is preferred for limited scan range applications. In order to improve the scan range, a b...

Antenna Beam Steering Without Phase Shifters – an ‘Old’ Technique Revisited

Antenna arrays are of perennial interest and relevance to RF wireless system designers, indeed the rise of 5G is showing their importance is only growing. Most implementations of linear arrays use phase shifters to feed the array and hence form the main-lobe beam. In the 1960s, a technique using RF switches and Fourier analysis was discovered to be a viable alternative to phase shifters called ...

Planar metamaterial-based beam-scanning broadband microwave antenna

synthesis of platinum nanostructures in two phase system

چکیده پلاتین، فلزی نجیب، پایدار و گران قیمت با خاصیت کاتالیزوری زیاد است که کاربرد های صنعتی فراوانی دارد. کمپلکس های پلاتین(ii) به عنوان دارو های ضد سرطان شناخته شدند و در شیمی درمانی بیماران سرطانی کاربرد دارند. خاصیت کاتالیزوری و عملکرد گزینشی پلاتین مستقیماً به اندازه و- شکل ماده ی پلاتینی بستگی دارد. بعضی از نانو ذرات فلزی در سطح مشترک مایع- مایع سنتز شده اند، اما نانو ساختار های پلاتین ب...