Browsing by Author "Manoj Kumar Meshram"

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CPW-fed fork shaped slotted antenna with dual-band notch characteristics
(IEEE Computer Society, 2014) Sachin Kalraiya; Hari Shankar Singh; Gaurav Kumar Pandey; Awadhesh Kumar Singh; Manoj Kumar Meshram
A coplanar waveguide (CPW) fed dual band-notched antenna for Ultra Wideband (UWB) and Bluetooth applications is presented. The proposed antenna consists of a planar fork shaped radiating patch and modified ground plane. The fork shaped radiating patch is fed with 50-0 CPW microstrip line. The proposed antenna has a total size of 25 × 30 mm2 and operates over the frequency band between 2.13 and 12.86 GHz. The conventional slots are created on the modified ground plane and radiating patch to obtained the band notched characteristics. The J-shaped slot is created on modified ground plane to obtained band notched at WiMAX (3.4 GHz-3.69 GHz) and U-shaped slot is created on feed line which is responsible for WLAN (5.15 GHz-5.85 GHz) band notched. The proposed antenna achieves good impedance matching, almost stable radiation patterns, and good peak realized gain over an operating band. © 2014 IEEE.
L-strip proximity fed shorted rectangular microstrip antenna for mobile communication
(2010) Amit Kumar Singh; Manoj Kumar Meshram; Babau R. Vishvakarma
A dual-band L-strip proximity fed shorted rectangular microstrip antenna is proposed and investigated theoretically simulated by HFSS and experimentally. Proposed radiating patch is located about (17.5 mm) above the ground plane. Return Loss and co- and cross polar radiation pattern are presented. Computed and measured results of return loss are in good agreement. The effect of the geometric parameters of the proposed antenna, such as length of the vertical and horizontal portion of the L-strip is also investigated. The impedance bandwidth (×10 dB return loss) 32.5% (calculated) and 33.00% (measured) for the proposed antenna are achieved for optimized antenna design. Significant size reduction (i.e., ̃85%) is obtained as compared with conventional rectangular patch of same resonant frequency. © 2010 Wiley Periodicals, Inc.
Vanadium oxide-based 16 × 16 reflectarray or FSS, reflect-transmitarray and FSS-based Cross-polarized wave absorber for future 6G applications
(Institute of Physics, 2025) Ravi Mali; Rajkumar Jatav; Praveen Singh Rathore; Manoj Kumar Meshram
In this paper, a novel unit cell-based array is designed and analyzed using a VO2-based intelligent ground plane. The proposed array can be used as reflectarray or frequency selective surface (FSS), FSS based cross-polarized wave absorber, and reflective-transmittive surface. The intelligent ground plane is made up of a cross-shaped slot, and it is filled with a thin vanadium dioxide (VO2) layer. The conductivity of the VO2 material is temperature-sensitive and it is changed due to the applied external DC biasing. The tunability of VO2 conductivity introduces the quad-function performance characteristics in a single array at 1-2 THz band. The first application of reflectarray is obtained by high DC (V1 Volt) biasing, while the other three applications are achieved by low voltage V2 (V2 < V1). A polarization rotating unit cell (PRUC) is designed to enhance the bandwidth and to obtain a wide 180° phase shift. This novel compact array saves the cost and area for THz applications. The array consists of 16 × 16 elements which is illuminated by a normal incidence of pyramidal horn antenna. The total volume of the array is 1600 × 1600 × 2100 μm3. The performance characteristics of the individual unit cell and array with and without intelligent ground plane are simulated in CST Microwave Studio. © 2025 IOP Publishing Ltd. All rights, including for text and data mining, AI training, and similar technologies, are reserved.