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Monika Chauhan

Bio: Monika Chauhan is an academic researcher from Indian Institute of Information Technology, Design and Manufacturing, Jabalpur. The author has contributed to research in topics: Wideband & Dielectric resonator antenna. The author has an hindex of 5, co-authored 22 publications receiving 65 citations.

Papers
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Journal ArticleDOI
10 Apr 2018
TL;DR: In this article, a compact stacked cylindrical dielectric resonator antenna (DRA) with a patch is proposed for wireless sensor network (WSN), which offers wide impedance bandwidth of 7.5GHz from 5.7 to 13.2GHz.
Abstract: In this article, a compact stacked cylindrical dielectric resonator antenna loaded with a patch is proposed for the wireless sensor network (WSN). Stacking of two dielectric material techniques is used to enhance the bandwidth of the antenna, and the metallic patch is used as a reflector for improving the gain and enforce compactness. The dielectric resonator antenna (DRA) is excited by the central coaxial probe feed with TM21 mode being observed at 6.7GHz resonant frequency. The proposed antenna is fabricated, and a close agreement is found between simulated and measured results. The proposed structure offers wide impedance bandwidth of 7.5GHz from 5.7 to 13.2GHz. A peak gain of 6.8 dBi is measured over the desired frequency band. The proposed DRA finds scenarios in WSNs and sensor node application.

16 citations

Journal ArticleDOI
TL;DR: In this paper, a low profile circularly polarized high directive dielectric Resonator Antenna (DRA) is presented for X-band wireless applications, which is excited by microstrip aperture slot coupling which is employed on the bottom side of the substrate.
Abstract: A low profile circularly polarized high directive Dielectric Resonator Antenna (DRA) is presented for X - band wireless applications. DRA is excited by microstrip aperture slot coupling which is employed on the bottom side of the substrate. Two asymmetric rectangular split rings are created adjacent to the feed line on the substrate to enhance the 3-dB axial ratio bandwidth and impedance bandwidth. Corrugated circular ring shaped single layer double sided meta superstrate is loaded on the DRA to enhance the peak gain to 11.9 dBi. The extracted lumped element model of the Superstrate unit is found to be in concurrence with Electromagnetic (EM) simulations. The proposed geometry offers a 1.1 GHz axial ratio bandwidth with 2.6 GHz impedance bandwidth. A prototype is fabricated and experimentally verified.

11 citations

Proceedings ArticleDOI
01 Oct 2018
TL;DR: In this paper, a compact ultra-wideband microstrip patch antenna with single notch characteristics is proposed, which consists of a split ring resonator and an open loop rectangular resonator.
Abstract: A Compact ultra-wideband microstrip patch antenna with single notch characteristics is proposed in this paper. The proposed antenna comprises of a split ring resonator (SRR) and an open loop rectangular resonator (OLRR). The split ring resonator in this paper plays a dual role, it acts as a radiating patch and also as a band rejecter to eliminate the entire worldwide interoperability for microwave access (WiMAX) covers 3.3 GHz – 3.6 GHz band. OLRR is used for the suppression of the harmonic frequency band notch. The compact size of the antenna is $\mathbf{36}\times \mathbf{30}\ \mathbf{mm}^{2}$ .

10 citations


Cited by
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Journal ArticleDOI
TL;DR: A comprehensive review of the state-of-the-art techniques and geometries which have been explored in the areas of dielectric Resonator Antennas (DRA) can be found in this article.
Abstract: This paper presents a comprehensive review of the state of art techniques and geometries which have been explored in the areas of Dielectric Resonator Antennas (DRA). With the evolution of first re...

35 citations

Journal ArticleDOI
TL;DR: In this article, a wideband hybrid fractal monopole antenna loaded with artifical magnetic conductor (AMC) is proposed, which achieves self-similarity compactness, reduced size and good wideband performances.
Abstract: A wideband hybrid fractal monopole antenna loaded with artifical magnetic conductor (AMC) is proposed. Using a hybrid fractal generator, the monopole antenna achieves self-similarity compactness, reduced size and good wideband performances. The ground is semi-elliptic and has defected steps aiming to improve impedance matching and X-pol. reduction. The AMC reflector has 3 × 3 array of cesaro shaped unit cells looped in a square metallic conductor. The AMC enhances radiation gain with back-lobe reduction. The AMC unit cell produce a 0 0 phase reflection at f AMC = 4.5 GHz and then loaded to optimize antenna performance. To validate the design, a prototype antenna is fabricated and measured. The antenna operates from (3.7–7.0) GHz with 61.68% impedance bandwidth, realized gain of (8.7–13.8) dBi, and radiation efficiency > 82.5%. The proposed antenna leverages on compactness, low-profile AMC height and good boresight radiation gain, which shows its potential for hybrid wireless cellular networks.

17 citations

Journal ArticleDOI
TL;DR: In this article, a single fed circularly polarized dielectric resonator antenna (CPDRA) was proposed for off-body communication in wireless body area network (WBAN) applications, which consists of a modified rectangular DRA made of Al2O3 with a permittivity of er = 9.8 and fed by a 50-Ω coaxial probe.
Abstract: A compact single fed circularly polarized dielectric resonator antenna (CPDRA) for off-body communication in wireless body area network (WBAN) applications is proposed. The proposed antenna consists of a modified rectangular DRA made of Al2O3 with a permittivity of er = 9.8 and fed by a 50-Ω coaxial probe. Two unequal vertical slits are etched off from both the corner edges of the rectangular dielectric resonator to generate TE δ 11 x and TE 1 δ 1 y modes, and to reduce the overall size of the proposed antenna. Moreover, an efficient single layer equivalent phantom model is designed to reduce the simulation time for the analysis of off-WBAN communications. The proposed antenna is fabricated and characterized in free space as well as in on-body environment. It provides measured impedance and axial ratio (AR) bandwidths of 66.19% (4.72–9.39 GHz) and 15.01% (6.22–7.23 GHz) respectively in free space, 65.91% (4.73–9.38 GHz) and 16.02% (6.20–7.28 GHz) respectively in on-body environment. A full ground plane is used to provide unidirectional radiation pattern and greater isolation from the human body with low SAR i.e. 0.397 W/kg and 0.193 W/kg for 1 g and 10 g tissue respectively. These features make the proposed CPDRA is suitable for off-body communication and can easily be integrated in wireless devices.

13 citations