Title:	Trapezoid-shaped resonators to design compact branch line coupler with harmonic suppression
Authors:	Siahkamari, Hesam Jahanbakhshi, Maryam Al-Anbagi, Haidar Najim Abbod Almtrod, Abdalghfor Abdalghfar A Pokorný, Michal Linhart, Richard
Citation:	SIAHKAMARI, H. JAHANBAKHSHI, M. AL-ANBAGI, HNA. ALMTROD, AAA. POKORNÝ, M. LINHART, R. Trapezoid-shaped resonators to design compact branch line coupler with harmonic suppression. AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS, 2022, roč. 144, č. February 2022, s. 1-8. ISSN: 1434-8411
Issue Date:	2022
Publisher:	Elsevier
Document type:	článek article
URI:	2-s2.0-85120816956 http://hdl.handle.net/11025/49367
ISSN:	1434-8411
Keywords in different language:	compact branch-line coupler;harmonic suppression;LC equivalent circuit of trapezoid-shaped resonator;new method for optimization based on LC;transfer function
Abstract in different language:	This article proposes a new branch-line coupler design using two trapezoid-shaped resonators, applied in side and center. The standard 35 and 50 Ohms λ/4 transmission lines (TLs) are attained through the variations of the resonator’s TLs width. Since there are not explicit formulas for the suggested trapezoidal shape resonator, the design procedure will include the derivation of new formulas to configure the LC equivalent circuit. The proposed branch-line coupler, operating at 0.95 GHz, has achieved 79% of size reduction if compared to the conventional designs. Furthermore, the suggested design has successfully diminished the first six harmonics with a suppression level of (41, 29, 29, 28, 20, and 20) dB, respectively. The bandwidth is from 800 MHz to 1 GHz and The fractional bandwidth is 22.2%.
Rights:	Plný text je přístupný v rámci univerzity přihlášeným uživatelům. © Elsevier
Appears in Collections:	Články / Articles (KEI) Články / Articles (RICE) OBD

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