Title :
A broadband 4×4 Butler matrix for modern-day antennas
Author :
Wincza, Krzysztof ; Gruszczynski, Slawomir
Author_Institution :
Inst. of Telecommun. & Acoust., Wroclaw Univ. of Technol., Poland
Abstract :
A broadband Butler matrix was designed manufactured and measured, excellent amplitude and phase characteristics were obtained over 1 GHz frequency band centered at 2.5 GHz which makes it very attractive for multi-band multibeam antenna applications. Many aspects of adequate designs of such a network are presented as well as analysis of the influence of components´ performance to overall network characteristics. Also detailed analysis of a transmission line crossover, which is a necessary element when a fully integrated antenna array is to be designed, is comprehensively investigated and a compensation technique of the deteriorative mutual coupling is proposed. Measurements of a 4 × 1 planar antenna array with the use of our Butler matrix are presented.
Keywords :
antenna feeds; broadband antennas; compensation; microwave antenna arrays; planar antenna arrays; 2.5 GHz; broadband Butler matrix; compensation technique; deteriorative mutual coupling; integrated antenna array; modern-day antennas; multiband multibeam antenna; network characteristics; phase characteristics; planar antenna array; transmission line crossover; Antenna arrays; Antenna measurements; Broadband antennas; Butler matrix; Frequency measurement; Manufacturing; Performance analysis; Phase measurement; Planar transmission lines; Transmission line matrix methods;
Conference_Titel :
Microwave Conference, 2005 European
Print_ISBN :
2-9600551-2-8
DOI :
10.1109/EUMC.2005.1610181
