Implementation of a Miniaturized Planar 4-Port Microstrip Butler Matrix for Broadband Applications | ||
| Journal of Communication Engineering | ||
| مقاله 5، دوره 9، شماره 1 - شماره پیاپی 18، فروردین 2020، صفحه 53-63 اصل مقاله (1015.03 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22070/jce.2020.5295.1154 | ||
| نویسندگان | ||
| Mostafa Maleki* 1؛ tohid aribi2؛ Ali Shadmand3 | ||
| 1Department of Electrical Engineering, Urmia University | ||
| 2Department of Electrical Engineering, Miandoab Branch, Islamic Azad University, Miandoab, Iran | ||
| 3Department of Electrical and Computer Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran | ||
| چکیده | ||
| In this paper, a miniaturized and broadband 4 × 4 Butler matrix is presented. All components of the presented matrix are designed in a way that, have the broadband impedance bandwidth and compact electrical size as much as possible. Traditional previous Butler matrix composed of phase shifters, while in the presented feeding network dummy crossover role this act, which results to enhance the phase difference bandwidth. The compactness of the optimized and proposed coupler is related to inserting the S-shaped arms instead of ordinary parts. The modified dummy crossover is used to overcome the mismatch phase difference among phase shifter and crossover. Design procedure of miniaturized broadband components such as 3-branch-line coupler, crossover, phase shifter and final design are presented step by step. The results of the simulation and measurement of the desired Butler matrix makes it suitable for the applications of planar multi-beam antennas. The extracted results determine that the bandwidth of the presented network is from 4.5 ~ 6 GHz, that is a good candidate for WLAN applications. The whole size of network is 71.5 × 38.3 mm2. | ||
| کلیدواژهها | ||
| Butler matrix؛ microstrip؛ broadband؛ planar؛ miniaturized | ||
| مراجع | ||
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