Eight-shaped polarization-dependent electromagnetic bandgap structure and its application as polarization reflector

Dalal, Priyanka; Dhull, Sanjeev Kumar

doi:10.1017/s1759078721000271

Cited by 4 publications

(5 citation statements)

References 23 publications

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“…Unit cell design and reflection phase of the planar EBG structure can be characterized by a parallel LC resonator with resonant frequency (f c ) [4]…”

Section: Unit Cell Of Proposed Dcs-pdebg and Reflection Phase Diagrammentioning

confidence: 99%

“…EBG configuration consists of periodic nature; therefore, compact size is desirable in such an application. In recent years, several single layer polarization dependent [1][2][3][4][5][6], single band [1][2][3][4][5][6][7], dualband [4,[8][9][10] planar EBG structures have been reported. An eight-shaped EBG [1] is proposed with a periodic size of 0.158λ 5.94 GHz × 0.297λ 5.94 GHz for reduction of specific absorption rate (SAR) reduction on three-layer body model.…”

Section: Introductionmentioning

confidence: 99%

“…An application for it is described to realize dual band circular polarization using 3 × 3 PDEBG surface as a reflector dual dipole antenna. A dual-band eight-shaped polarization dependent mushroom type EBG [4] structure is proposed with a patch size of 0.14λ 3.32 GHz × 0.07λ 3.32 GHz with the application as a polarization reflector. A polarization-dependent EBG [5] surface is proposed with an inclined sheet via patch size of 0.21λ 3 GHz ×0.21λ 3 GHz .…”

Section: Introductionmentioning

confidence: 99%

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Compact Planer Dual Band Circular Shaped Polarization-dependent Electromagnetic Band Gap Structure to Reduce the RCS

Morey,

Pawar

2023

PIER Letters

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In this paper, a compact planar dual-band circular-shaped polarization-dependent electromagnetic band gap (DCS-PDEBG) structure operates at 2.97 GHz and 7.77 GHz in y-direction and 3.14 GHz and 10.90 GHz in the x-direction. A proposed DCS-PDEBG structure consists of a circular patch inside a square patch with a slot at the center, and the established arrangement gives additional capacitance and compact size. The simulation of the DCS-PDEBG is carried out using the Finite Element Method (FEM) of Ansys High-Frequency Simulator (HFSS) and experimentally validated. A truncated microstrip line (TML) method is used to measure the band gap of the proposed planar DCS-PDEBG structure. Experimental results agree well with simulation one. The periodic size of proposed DCS-PDEBG structure is 0.13λ 2.97 GHz × 0.13λ 2.97 GHz , which is a good candidate where compact size is highly desired.

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“…Unit cell design and reflection phase of the planar EBG structure can be characterized by a parallel LC resonator with resonant frequency (f c ) [4]…”

Section: Unit Cell Of Proposed Dcs-pdebg and Reflection Phase Diagrammentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Compact Planer Dual Band Circular Shaped Polarization-dependent Electromagnetic Band Gap Structure to Reduce the RCS

Morey,

Pawar

2023

PIER Letters

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“…EBG structures are periodic metallic patches arranged over dielectric substrates [44]. Because of the two unique characteristics of EBG structures, i.e., surface wave bandgap and reflection phase bandgap, these structures have been exploited by microwave and antenna engineers for a vast number of applications [45,46]. To explain the characteristics of EBG structures, the unit cell of via loaded EBG structure can be equated to an equivalent LC circuit, where the inductance L is accounted to the current flowing through the via, and the capacitance C is accounted to the gap between the EBG patches.…”

Section: Design Of Triple Bandgap Ebg Structurementioning

confidence: 99%

Design of Triple Band-Notched Uwb Mimo/Diversity Antenna Using Triple Bandgap Ebg Structure

Dalal¹,

Dhull²

2021

PIER C

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This paper presents the design of a compact triple band-notched ultra-wideband (UWB) two element multiple-input multiple-output (MIMO) antenna. To validate the simulation results, the prototype of the design is fabricated and experimentally measured. From the experimental results, it is observed that the proposed design, operating in the frequency range 2.5-12 GHz, successfully rejects three interfering bands, i.e., the WiMAX band, WLAN band, and X-band satellite communication downlink channel, when a triple bandgap CSRR-loaded EBG structure is embedded close to the feedline of the UWB antenna. In the ground plane of the MIMO antenna, a rectangular slot and a mirrored pair of F-shaped stubs are added to minimize the mutual coupling between the UWB elements. The proposed MIMO antenna has good wideband isolation between the elements (> 20 dB), high diversity gain (10 dB), and low envelope correlation coefficient (< 0.02) over the entire UWB.

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“…For PDEBG the surface wave band gap and reflection phase band gap may differ from each other in different orthogonal directions. Compact EBG microstrip line has been designed by authors in [19] using surface wave band gap property of PDEBG. In our work, structure compactness is attained by using a novel U-shaped slot, stretched strip, and rectangular slot embedded in adjacent PDEBG without vias.…”

Section: Introductionmentioning

confidence: 99%

Compact Embedded Dual Band EBG Structure with Low SAR for Wearable Antenna Application

Keshwani¹,

Bhavarthe²,

Rathod³

2022

PIER M

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In this paper, a rectangular embedded dual band Electromagnetic Band Gap (EBG) structure at frequencies 2.45/5.8 GHz useful in industrial, scientific, and medical (ISM) band for various wearable applications is proposed. The main intent of this work is to design a dual-band EBG to reduce specific absorption rate (SAR). The unit cell which is a part of the EBG structure is formed using a rectangular patch. It has a U-shaped rectangular slot and a stretched strip with a rectangular patch at end. EBG unit cell simulation is accomplished by solving eigen-mode problem in High Frequency Structure Simulator (HFSS). EBG structure has to be suitably designed and fine tuned for specified band stop property to reduce surface waves. It must improve front to back ratio (FBR). With placing antenna on human body, frequency detuning occurs which is undesirable thus emphasizing the need of improvement in impedance bandwidth. This improvement can be achieved by a suitable design of EBG structure. In this work, the proposed EBG structure is integrated with a dual-band monopole antenna at frequencies 2.45/5.8 GHz for wearable application. The evaluation of antenna performance on a four layer body model is carried out. Simulations are used to demonstrate EBG array structure effectiveness for the reduction of Specific Absorption Rate (SAR) on the four layer body model. Computed SAR values for tissue in 1 g and 10 g are within standard prescribed limits. It is concluded that the proposed dual-band antenna is appropriate for wearable applications. Proposed EBG array is fabricated and integrated with a twin E-shaped monopole antenna. The measurement of reflection coefficient, radiation pattern, and transmission coefficient of fabricated EBG array is carried out. The measured and simulated results show good agreement. Antenna performance in the event of bending condition and on-body condition is assessed.

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Eight-shaped polarization-dependent electromagnetic bandgap structure and its application as polarization reflector

Cited by 4 publications

References 23 publications

Compact Planer Dual Band Circular Shaped Polarization-dependent Electromagnetic Band Gap Structure to Reduce the RCS

Compact Planer Dual Band Circular Shaped Polarization-dependent Electromagnetic Band Gap Structure to Reduce the RCS

Design of Triple Band-Notched Uwb Mimo/Diversity Antenna Using Triple Bandgap Ebg Structure

Compact Embedded Dual Band EBG Structure with Low SAR for Wearable Antenna Application

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