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... SIW is intended for millimeter and centimeter applications [5] and Fig.1 shows simple diagram of SIW. Assume "s" denotes distance between two holes; "h" represents height of the SIW and "d" represents diameter of the holes. SIW is constrained from rectangular waveguide and shown in Fig. 2 and the cut of frequency can be found below ...
Context 2
... Integrated Waveguide is the good remedy for implementing high frequency applications that is centimeter and millimeter applications and its driven a family of substrate integrated circuits (SICs) [7]. The structure shape is similar to rectangular waveguide and fabricated by using two rows of metallic holes or vias joining the top and bottom copper planes of a dielectric substrate [8][9] and shown in fig.1. This is very popular due to simple structure, low cost and printed circuit board process (PCB) [4] or other planar processing techniques are used for fabrication, possibility to mount one or more chipsets in single substrate. SIW main advantages are integrated in planar form which holds active components, passive components and ...
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Citations
... For example, the antenna introduced in (Mortazavi et al. 2014) achieves a wide bandwidth of 10 GHz. The antennas described in Kumar and Shanmuganantham (2017), Tewari and Joshi (2022), Nandakumar and Shanmuganantham (2018) and Kumar and Shanmuganantham (2016) exhibit low gain, and all four antennas share a common feature of a narrow impedance bandwidth. In contrast, the antenna presented in this paper has a relatively wide bandwidth and high gain, well impedance matching condition, as shown in the Table 3. ...
In this paper, a planar microstrip patch antenna element with suspended cavity (SC), based on microelectromechanical systems (MEMS) technology, is presented for unlicensed V-band (57–66 GHz) application. To fabricate the hybrid-integrated antenna with 60 GHz monolithic microwave integrated circuit (MMIC) chip on the same substrate, quartz glass with a low relative permittivity (εr = 3.78), instead of silicon with a high relative permittivity (εr = 11.9), is used as the dielectric substrate. The substrate under the antenna element is removed to generate SC, which further decrease the relative permittivity of the dielectric substrate, thereby improving the antenna efficiency and suppressing surface waves. Furthermore, a nine-element series-fed microstrip patch antenna array with SC is also designed based on above proposed antenna element. The antenna element and array are simulated in ANSYS HFSS. The results demonstrate that the antenna element and array have wide impedance bandwidth (S11 < − 10 dB) of 4.18 GHz (57.87–62.05 GHz) and 4.29 GHz (57.83–62.12 GHz), and high peak gains of 9.08 dB and 13.9 dB, respectively. Besides, the antenna array has high directivity with main lobe width less than 60° and sidelobe suppression. The findings demonstrate that the proposed antenna element and array can provide promising insights for designing and manufacturing of antennas for 60 GHz wireless equipment.
... Similarly, the design of E-shaped slot antenna backed with SIW cavity was introduced for 60 GHz applications [25] in which a gain of 7.12 dB is achieved and suitable for automotive applications. A T shaped slot antenna has been designed with achieved gain of 6.33dB [26] and also gain of 12 dB was achieved in [27]. Rest of this paper is composed as following. ...
... SIW is one type of transmission line used for high-frequency range applications, also called as laminated waveguide and post-wall waveguide [4][5][6][7][8], and the generalized diagram of SIW is exposed in Fig. 1. The shape is common like a rectangular waveguide [9][10][11][12], integrated using two rows of periodic vias or holes inserted between top and bottom of ground planes through a substrate. Due to planar technology that is used in SIW, it can also be used as active and passive components and antennas. ...
In this paper, a lotus-shaped slot antenna with SIW for dual-band applications those are 60 and 79 GHz frequencies is introduced and designed with the help of Rogers substrate (5880) with εr = 2.2 and substrate thickness is 0.381 mm. This antenna will produce two resonant frequencies that are 60 GHz (covers bandwidth of 2.25 GHz, i.e., 58.868–61.122 GHz) and 79 GHz (covers a bandwidth of 3.05 GHz, i.e., 77.475–80.518 GHz). The simulation results of the proposed structure like reflection coefficient, radiation pattern, gain, radiation efficiency, VSWR, and surface current are observed.
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... Ref. [5] Ref. [6] Ref. [7] Proposed design IV. COMPARISION Table II represents the comparisons between exist structure with proposed structure. ...
Abstract The performance of two feature extraction techniques: Fractal Geometrical Technique (FGT) and the Second-Order Statistical Technique (SST) are investigated
by considering the biological structure of the human brain for brain tumors detection application. FGT provides features like lacunarity, differential box height, and
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