Analysis of microstrip low pass filter at terahertz frequency range in finite difference time domain method for radar applications
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K. S. Lavanya
Abstract
Terahertz Technology is a promising newer technology for various applications in wireless and radar communication namely tracking and detecting radar targets. The challenging aspect of radar transmitters in the target detection process is spurious harmonic signals that affect the communication path between radar transceivers. The spurious signal can be neglected by a strong filtering method. Filtering is vital in radar transmission to avoid high spurious emission level signals. Low pass filtering at terahertz frequency range (LPFT) in microstrip structure defined in the chapter analysis to avoid the harmonics above the cut-off frequency. In this chapter, the analysis part of microstrip structured LPFT is implemented under finite difference time domain analysis at (0.3 THz to 0.5 THz) cut-off frequency. Finite difference time domain (FDTD) is the three-dimensional approach commonly used for the analysis in higher frequency applications. In this FDTD method, Maxwell equation’s partial derivatives are centred to finite frequency by discretization. LPFT 3D-plot is characterized by the signal factors of the input signal, reflected signal, and passed signal concerning time. Scattering parameters |s11| and |s21| are characterized by frequency and magnitude plots with an insertion loss of 0.3 dB. Full-wave analysis of LPFT is compared with Chebyshev and Butterworth filter at terahertz cut-off range is implemented. The comparison plot of attenuation versus relative frequency and characteristic impedance versus dielectric constant is shown with FDTD results with good agreement.
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Research ethics: Not applicable.
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Informed consent: Not applicable.
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Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission. Ms. Lavanya K.S – Conceptualization, Writing original draft. Dr. N. Vijayalakshmi – Writing original draft. Dr. S. Preethi – Writing review & editing.
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Competing interests: The authors state no conflict of interest in this work.
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Research funding: None declared.
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Data availability: Not applicable.
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Articles in the same Issue
- Frontmatter
- Atomic, Molecular & Chemical Physics
- Atom-bond-connectivity (ABC) indices of graphene sheets, zigzag single walled carbon nanotubes and single walled carbon nanotori
- Calibration-free approaches for quantitative analysis of a brass sample
- Dynamical Systems & Nonlinear Phenomena
- Significance of hafnium nanoparticles in hydromagnetic non-Newtonian fluid-particle suspension model through divergent channel with uniform heat source: thermal analysis
- Evolution of shock waves in dusty nonideal gas flow with magnetic field
- Quantum Theory
- Analysis of microstrip low pass filter at terahertz frequency range in finite difference time domain method for radar applications
- Solid State Physics & Materials Science
- Enhancing charge transport and photoluminescence characteristics via transition metals doping in ITO thin films
- Effect of zinc doping on structural, bonding nature and magnetic properties of co-precipitated magnesium–nickel ferrites
- Nonreciprocal transmission in composite structure with Weyl semimetal defect layer
