Author
Naveen G. Babu
Bio: Naveen G. Babu is an academic researcher from Shiv Nadar University. The author has contributed to research in topics: Boundary value problem & Dispersion relation. The author has an hindex of 1, co-authored 2 publications receiving 1 citations.
Papers
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01 Mar 2019
TL;DR: In this paper, the dispersion equation of a dielectric loaded anisotropic conducting tape helix slow wave structure for planar TWTs is derived through accurate boundary conditions that restrict the field only on the tape surface and not in the gap regions.
Abstract: The dispersion equation of a dielectric loaded anisotropically conducting tape helix slow wave structure for planar TWTs is derived. By assuming the current density behavior on the rectangular tape helix, the dispersion relation is obtained through accurate boundary conditions that restrict the field only on the tape surface and not in the gap regions. Substitution of the field equations in the boundary conditions results in the six complex constants of the field equations. The complex constants are re-substituted in the last boundary condition that consists of the restricting function or the indicator function to arrive at the dispersion equation. The derived dispersion equation can be used to obtain the dispersion characteristics for a more practically relevant planar TWT interaction structure.
3 citations
11 Feb 2022
TL;DR: In this article , a single octagonal shape patch antenna is proposed to generate multiple OAM modes using proper feeding techniques, and the proposed antenna is designed and simulated for resonating frequency of 5.2 GHz, WLAN band and it can generate OAM beam with topology charge l = 0, ±1, ±2 and ±3.
Abstract: This paper presents the generation of various OAM modes using single octagonal shape patch antenna. The proposed OAM antenna is compact in size and can generate multiple OAM modes using proper feeding techniques. The proposed OAM antenna is designed and simulated for resonating frequency of 5.2 GHz, WLAN band and it can generate OAM beam with topology charge l = 0, ±1, ±2 and ±3. Beam of topology charge ±3 is also generated but with little distortion.
2 citations
07 Mar 2019
TL;DR: In this article, the dispersion equation for a planar traveling wave tube with anisotropic conducting open helix structure is derived and the exact solution of a homogenous boundary value problem for Maxwell's equations is derived.
Abstract: The dispersion equation for a planar traveling wave tube with anisotropically conducting open helix structure is derived. Using, the accurate boundary conditions along all the sides of the planar TWT and along the winding direction of the TWT using indicator function, the exact solution of a homogenous boundary value problem for Maxwell's equations is derived. A total number of six different complex constants are derived from a set of six boundary conditions for the proposed cold wave analysis. The presented theoretical analysis will be used in the design of the planar travelling wave tube amplifier (TWTA).
2 citations
11 Feb 2022
TL;DR: The simulation result shows that the proposed antenna has maximum gain and efficiency of 8.58dBi and 95.5% at 0.465THz, suitable for applications like 6G technology.
Abstract: In this manuscript a compact wide band antenna for sub-THz application is proposed. The antenna is designed on a polyimide substrate using graphene as conducting patch and ground. The antenna has an extremely small overall dimension of $1000\mu m\times 1000\mu m$. The proposed H-shaped slot antenna has center frequency 0.57THz and other resonances at 0.465THz, 0.58THz & 0.654THz. The proposed design exhibits good impedance matching as well as large bandwidth of 230GHz (40.35%). The simulation result shows that the proposed antenna has maximum gain and efficiency of 8.58dBi and 95.5% at 0.465THz. This antenna is suitable for applications like 6G technology.
11 Feb 2022
TL;DR: The simulation result shows that the proposed antenna has maximum gain and efficiency of 8.58dBi and 95.5% at 0.465THz, suitable for applications like 6G technology.
Abstract: In this manuscript a compact wide band antenna for sub-THz application is proposed. The antenna is designed on a polyimide substrate using graphene as conducting patch and ground. The antenna has an extremely small overall dimension of $1000\mu m\times 1000\mu m$. The proposed H-shaped slot antenna has center frequency 0.57THz and other resonances at 0.465THz, 0.58THz & 0.654THz. The proposed design exhibits good impedance matching as well as large bandwidth of 230GHz (40.35%). The simulation result shows that the proposed antenna has maximum gain and efficiency of 8.58dBi and 95.5% at 0.465THz. This antenna is suitable for applications like 6G technology.
Cited by
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01 Jan 2008
TL;DR: In this paper, Wu et al. describe a SWS called SWS, which is an extension of the HFSS, and describe the SWS as a "self-defense" system.
Abstract: 打印矩形的螺旋的一种新类型慢波浪的结构(SWS ) 在边界用匹配地的方法和电磁的不可分的方程被调查。包括分散方程和联合阻抗为的无线电频率特征横向反对称(奇怪) 这结构的模式被分析。数字结果同意很好，结果由 EM 模拟软件 HFSS 获得了。矩形的螺旋电路的分散被削弱，这被显示出，阶段速度在在矩形的螺旋 SWS 充满绝缘的材料以后被减少。作为平面慢波浪的结构，这结构在紧缩的 TWT 有潜在的应用程序。[从作者抽象]
7 citations
25 Apr 2023
Abstract: A rectangular open tape helix is analysed for its dispersion characteristics by deriving the dispersion equations that restrict the fields within the tape helix region by incorporating a confinement function. The dispersion equations are derived by applying the accurate boundary conditions to one-quarter of the structure in axial and transverse directions owing to the symmetricity of the rectangular helical waveguide. The dispersion characteristics are numerically computed from an infinite number of simultaneous equations. The computed characteristics is compared with the theoretical model of sheath helix consisting of only the fundamental harmonics. Plotted dispersion characteristics reveals the potential usability of such devices as compact traveling wave tubes by miniaturization and can be printed.
19 Dec 2022
TL;DR: In this paper , a spiral array of rectangular patch antennas is proposed to generate various OAM modes using novel spiral array antenna design, which can resonate at 5.2 GHz for WLAN applications and can generate OAM beam with topology charge l = 0, ± 1.
Abstract: This paper presents the generation of various OAM modes using novel spiral array of rectangular patch antennas. The proposed design ceases the requirement of a complex power dividing phased network. The presented OAM antenna is designed to resonate at 5.2 GHz for WLAN applications and can generate OAM beam with topology charge l = 0, ±1. A comparison study of the new OAM design with the conventional Uniform Circular Array (UCA) used for OAM modes generation is also presented.
19 Dec 2022
TL;DR: In this article , a spiral array of rectangular patch antennas is proposed to generate various OAM modes using novel spiral array antenna design, which can generate OAM beam with topology charge l = 0, ± 1.
Abstract: This paper presents the generation of various OAM modes using novel spiral array of rectangular patch antennas. The proposed design ceases the requirement of a complex power dividing phased network. The presented OAM antenna is designed to resonate at 5.2 GHz for WLAN applications and can generate OAM beam with topology charge l = 0, ±1. A comparison study of the new OAM design with the conventional Uniform Circular Array (UCA) used for OAM modes generation is also presented.
25 Apr 2023
TL;DR: In this article , a modified dispersion equation for the dielectric-loaded rectangular planar tape helix (PTH) is derived, simplified, and verified for mathematical symmetricity.
Abstract: The current limiting function, along with the other field boundary conditions, is used to obtain the approximate modified dispersion equation for the dielectric-loaded rectangular planar tape helix (PTH). The additional boundary condition employing the current limiting function confines the current density distribution within the surface region of the tape helix, thereby nullifying the fields in the gap regions of the PTH. Despite the increase in complexity of the electromagnetic boundary value problem, the accurate dispersion equation is derived, simplified, and verified for mathematical symmetricity. The derived dispersion equation is numerically computed for $\beta_{0a}(k_{0a})$ with a significant convergence rate for each root of the $\beta_{0a}$ function. The dispersion characteristics consisting of fundamental harmonic and few additional harmonics is plotted from a finite number of simultaneous equations approximated from an infinite set.