In this paper, a W-band single-layer reflectarray antenna is proposed with the advantages of broadband and high aperture efficiency. A novel dual rotation-symmetry windmill element designed in W-band, which consists two layers copper patches printed on Rogers RT5880 substrate. Based analysis metasurface element, square 13.85λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http...

This paper presents a novel approach to synthesizing curved reflectarrays using Geometrical Optics (GO). It introduces the concepts of virtual normal and path length shift, which enable vector-based formulation problem that can be solved ray tracing techniques. The is applied for design two different versions Dual Bifocal Reflectarray with parabolic main surface flat subreflectarray. first vers...

We propose a W-band circularly polarized reflectarray antenna in this article, which contains single-layer and linearly horn feed. To realize the proposed antenna, we designed novel multi-resonant element containing Rogers RT5880 substrate with copper patches printed on its both surfaces. Then, circular 12.25 λ0 (39.1 mm) aperture diameter was based element, whose center frequency is 94 GHz. fu...

هدف: پژوهش حاضر با هدف بررسی مقایسه اثربخشی گروه درمانی شناختی – رفتاری و ذهن ­آگاهی مبتنی بر شناخت کاهش رفتارهای پرخطر در معتادان ترک افیونی صورت گرفت. روش: روش این شبه آزمایشی طرح پیش آزمون پس همراه کنترل است. جامعه­ی آماری شامل کلیه افراد وابسته به مواد مراجعه کننده مرکز اعتیاد شبکه بهداشت درمان شهرستان سرپل ذهاب نیمه اول سال 1396 بود، نمونه­ گیری دسترس تعداد 36 نفر تشخیص وابستگی اساس معیاره...