نتایج جستجو برای: siw
تعداد نتایج: 624 فیلتر نتایج به سال:
An excitation technology of TE40 mode for substrate integrated waveguide (SIW) and its application in designing a slot antenna array is proposed. In order to excite the TE40 mode, a microstrip power divider and two coupling slots driven by microstrip lines in the longitudinal direction of SIW are designed to convert the electromagnetic field pattern from slot lines to SIW. The advantages of the...
The paper presents the design and fabrication of a H-plane substrate integrated waveguide (SIW) horn antenna. The antenna operates at 60 GHz band and is equipped with a SIW-to-WR15 transition. Experimental results prove that the antenna achieves the gain of 11.5 dBi and the impedance bandwidth of 14 % for the reflection coefficient less than -10 dB. The antenna was designed with the help of CST...
The mode-matching technique is deployed in this paper in order to analyze and design a substrate integrated waveguide (SIW) T-junction diplexer in Ku-band. The diplexer has bandwidths of 4.12% and 3.79% at 14.55 and 15.85 GHz, respectively. Also in Ku-band, an SIW corner filter is analyzed and designed with the same technique. Analytical results are compared with simulated data obtained from co...
This paper shows a comparative study of Multi U–shaped slot antenna with the substrate integrated waveguide(SIW) fed patch antenna. By cutting four asymmetrical U-slots, we can make U-shaped patch antenna. Advantages of this structure are the simple feed, single layer structure, simple structure of antenna, one more degree of freedom can be achieved by the asymmetry of U-slot arm. The design gu...
The design and fabrication of a band-pass step impedance filter based on high and low dielectric constant sections has been realized on substrate integrated waveguide (SIW) technology. The overall process includes the design of the ideal band-pass prototype filter, where the implementation of the impedance inverters has been carried out by means of waveguide sections of lower permittivity. This...
In multilingual scene text understanding, script identification is an important prerequisite step for image recognition. Due to the complex background of images in natural scenes, severe noise, and common symbols or similar layouts different language families, problem has not been solved. This paper proposes a new method based on ConvNext improvement, namely EA-ConvNext. Firstly, generating edg...
فناوری siw جایگزین مناسبی برای موجبرها در مدارهای صفحه ایی است .فناوری siw به دلیل مزایایی همچون ضریب کیفیت بالا، هزینه پایین، اندازه کوچک و قابلیت پیاده سازی هم ¬زمان با مدارات صفحه ایی، نسبت به دیگر مدارات مایکرویو مورد توجه بیشتری قرار گرفته است. در واقع siw مصالحه ای میان ضریب کیفیت، توان قابل تحمل، ابعاد، هزینه و یکپارچگی ادوات ساخته شده میباشد. اخیراً بسیاری از کاربردهای مدارهای siw از جمل...
Recently, has emerged a n ew technology, substrate integrated waveguide (SIW) [1] [2], it has been applied successfully to the conception of planar compact components for the microwave and millimeter waves applications [3] [4]. Our study concerns the analysis of right bends of rectangular waveguides under SIW technology by the HFSS code, in order to simulate different chamfrain positions, throu...
Abstract This paper presents wideband split-ring antenna arrays based on substrate integrated waveguide (SIW) for Ka-band (26.5–40 GHz) applications. The array is fed by a 2.92 mm coaxial connector (K-connector) and the power equally distributed to each resonator. designed coplanar (CPW), SIW, CPW-to-SIW transition, coaxial-to-CPW two-stage SIW divider are described in detail. By using thin Rog...
BACKGROUND Benzodiazepines are extensively used in primary care, but their long-term use is associated with adverse health outcomes and dependence. AIMS To analyse the efficacy of two structured interventions in primary care to enable patients to discontinue long-term benzodiazepine use. METHOD A multicentre three-arm cluster randomised controlled trial was conducted, with randomisation at ...
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