A Wide Dual-Band Metamaterial-Loaded Antenna for Wireless Applications

Chilukuri, Sulakshana; Gundappagari, Srividya

doi:10.26866/jees.2020.20.1.23

Cited by 12 publications

(5 citation statements)

References 15 publications

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“…In this study, the method of moment (MoM) [13,14] with a parallel-plate Green's function is employed to calculate the S-parameters [10]. It should be noted that MoM is highly suitable for the optimization-based approach because it is significantly faster than other full-wave electromagnetic analysis methods, such as the finite element method [15] or the finite-difference time-domain method [16][17][18][19][20]. The complex permittivity extracted by the NRW method is used as an initial value for the MoM solver in the optimization process.…”

Section: Methodsmentioning

confidence: 99%

New Measurement Technique for Complex Permittivity in Millimeter-Wave Band Using Simple Rectangular Waveguide Adapters

Park

Cho²,

Lee³

et al. 2022

J. Electromagn. Eng. Sci

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This research presents a novel methodology for measuring the complex permittivity of a material under test (MUT) in a millimeter-wave (mmWave) band by using two rectangular waveguide adapters. Contrary to the conventional Nicolson-Ross-Weir (NRW) method, the proposed complex permittivity measurement method does not require a material fabrication process for exact MUT insertion into a waveguide. In our complex permittivity measurement, simple commercial waveguide adapters are employed instead of large flange structures. The proposed complex permittivity measurement of a non-destructive MUT is achieved by combining the NRW method, the Gaussian weighting moving average filtering technique, a full-wave electromagnetic analysis, and an optimization technique. Furthermore, the proposed methodology is validated by fabricating a Teflon-based MUT and by measuring the complex permittivity of the MUT in the Ka band (26.5–40 GHz). The results indicate that the proposed methodology exhibits good agreement with the data sheet.

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Section: Methodsmentioning

confidence: 99%

New Measurement Technique for Complex Permittivity in Millimeter-Wave Band Using Simple Rectangular Waveguide Adapters

Park

Cho²,

Lee³

et al. 2022

J. Electromagn. Eng. Sci

View full text Add to dashboard Cite

show abstract

“…Step 3 shows the bow-tie antenna with a meandered slot. Using a slot on radiator is a commonly used method to achieve dual band [40][41][42][43][44][45][46]. Typically, the slot length is approximately between quarter to half wavelength.…”

Section: Antenna Configuration and Designmentioning

confidence: 99%

Compact Dual-Band On-Body Near Field Antenna With Reflector for Measuring Deep Core Temperature

et al. 2023

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Human deep core temperature is a vital health condition parameter. Human body temperature change begins from the deep core followed by change in skin temperature. Measuring deep core temperature is the first action for rapid detection of health condition. Infrared thermometer can measure temperature; however, the only measures the skin temperature. The use of microwave radiometer for measuring deep core temperature has garnered attention. The antenna, an important component of the microwave radiometer, has rarely been focused upon in studies on measurement of deep core temperature. This study proposed compact dual-band on-body near field antenna with a reflector for measuring deep core temperature using a microwave radiometer. The proposed antenna size is 13 mm × 13 mm with a 20 mm × 20 mm reflector 3 mm above the radiator. The proposed antenna was simulated and designed on a full 3D body model and simplified flat phantom and measured on real human wrist. It achieved sufficient bandwidth and volume loss density can be used in microwave radiometers for measuring deep core temperature.INDEX TERMS Deep core temperature measurement, dual-band antenna, on-body antenna, sim4life

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“…Controlling the characteristic mode of the metal rim can also enhance the antenna bandwidth and performance [28−29]. Additionally, a micro-strip feed monopole antenna design method can achieve wideband performance [30]. In addition, antenna design using the characteristic mode of the printed circuit board (PCB) can also realize wideband antenna technology [31−37].…”

Section: Introductionmentioning

confidence: 99%

Dual Bandwidth Enhancement Using a New Multi-Resonance Feeding Structure for 5G Communication

Li,

Qu,

et al. 2024

IEEE Access

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This paper introduces a multi-resonance feed structure to control the input impedance for achieving a dual wide-impedance bandwidth technology. According to the simulation, the bandwidth of the proposed antenna structure was approximately 330 MHz with the lower band (ranging from 670 MHz to 1000 MHz) and 1210 MHz with the higher band (ranging from 1670 MHz to 2880 MHz) under a 3:1 voltage standing wave ratio. Moreover, the average efficiency was significantly increased from 26.6% (reference) to 46.5% (proposed) at the lower band (ranging from 550 MHz to 1020 MHz) and even higher at the higher band, increasing from 15.5% (reference) to 61.2% (proposed) (ranging from 1400 MHz to 3000 MHz). The radiation pattern also showed satisfactory antenna radiation performance. This proposed technology has the advantage of achieving input impedance matching more easily and covers most fifth-generation (5G) NR operating bands in FR1 (n1, n3, n5, n8, n25, n30, n41, n66), indicating its promising application to 5G communication.

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A Wide Dual-Band Metamaterial-Loaded Antenna for Wireless Applications

Cited by 12 publications

References 15 publications

New Measurement Technique for Complex Permittivity in Millimeter-Wave Band Using Simple Rectangular Waveguide Adapters

New Measurement Technique for Complex Permittivity in Millimeter-Wave Band Using Simple Rectangular Waveguide Adapters

Compact Dual-Band On-Body Near Field Antenna With Reflector for Measuring Deep Core Temperature

Dual Bandwidth Enhancement Using a New Multi-Resonance Feeding Structure for 5G Communication

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