Wide to multiband elliptical monopole reconfigurable antenna for multimode systems applications

Idris, Izni Husna; Hamid, M. R.; Kamardin, Kamilia; Rahim, M. K. A.

doi:10.12928/telkomnika.v17i4.12764

Cited by 4 publications

(4 citation statements)

References 24 publications

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“…Although the band shifted to the lower band, some stopbands occurred due to the expected coupling. Hence, the rectangular EBG structure added at the back of the antenna to suppress the back radiation, reduce the SAR value, and improve the radiation efficiency of the antenna through the inductive and capacitive effects that exist in every periodic structure (Like PBG, HIS, FSS) [25][26][27][28]. After degrading the undesired stopbands and extinguish them, the stub is connected to the EBG on the other side of the antenna using shorting pins (red points in Figure 1.).…”

Section: Figure 3 Reflection Coefficient Results Of the Proposed For Each Stepmentioning

confidence: 99%

Miniaturized UWB elliptical patch antenna for skin cancer diagnosis imaging

Alani

Zakaria

Ahmad

2020

IJECE

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The biomedical imaging shows promising results in many applications such as protein characterization and cancer detection using non-ionizing radiation. Skin cancer is one of the most common types of cancer because it is exposed by sun rays during the day. Many techniques have been offered to detect the tumor in the early stage such as ultrasonic and MW imaging. However, most of these studies showed a large printing area with lower BW so as the low resolution. To overcome these drawbacks, a new low profile UWB elliptical patch antenna with high performance is designed on PTFE as a substrate. Then a layer of Indium Tin Oxide (ITO) applies to improve the antenna radiation characteristics. The proposed antenna has a broad BW from 3.9 GHz to 30 GHz along with a resonance at 2.4 GHz. Furthermore, the antenna presents a maximum gain of 7.3 dB, maximum directivity of 7.78 dBi, the maximum radiation efficiency of 92 %, and consistent, stable radiation pattern throughout the frequency band. Besides, the time-domain characteristics show that the antenna can be a suitable candidate for microwave imaging of skin cancer.

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Section: Figure 3 Reflection Coefficient Results Of the Proposed For Each Stepmentioning

confidence: 99%

Miniaturized UWB elliptical patch antenna for skin cancer diagnosis imaging

Alani

Zakaria

Ahmad

2020

IJECE

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“…Problems in the measurement value may occur due to the fabrication error or coming from the board itself. Based on the result shown in Figure 4, a filter can be introduced in order to get another mode such as singleband and dual-band only as reported in [29].…”

Section: Results and Analysismentioning

confidence: 99%

A multiband and wideband frequency reconfigurable slotted bowtie antenna

Idris

Hamid

Kamardin

et al. 2020

IJEECS

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A multiband and wideband frequency reconfigurable antenna is presented. A wideband from 3.5 GHz to 9.0 GHz is achieved by introducing one stripline in the middle of a slotted bowtie antenna, whereas multiband is obtained by integrating an additional two slotted arms at the end of bowtie-shaped. As a result, the antenna operated at multiband mode (1.7 GHz and 2.6 GHz) and wideband mode (3.5 GHz to 9.0 GHz) simultaneously. The reconfigurability of the antenna is attained through switches. Five states are achieved with three pairs of switches configurations. All results are presented and discussed, including S11, current distribution, radiation pattern, and gain. The antenna is suitable to be used in multimode communication systems.

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“…In terms of hardware resources, speed (weight updating rate), algorithms implemented and applications proposed, the present work is compared with earlier recorded works [41], [42].…”

Section: White Noise Plus Spatially Spread Interference Considerationmentioning

confidence: 99%

Discrete interferences optimum beamformer in correlated signal and interfering noise

Singh

Yadav

et al. 2022

IJECE

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This paper introduces a significant special situation where the noise is a collection of D-plane interference signals and the correlated noise of D+1 is less than the number of array components. An optimal beamforming processor based on the minimum variance distortionless response (MVDR) generates and combines appropriate statistics for the D+1 model. Instead of the original space of the N-dimensional problem, the interference signal subspace is reduced to D+1. Typical antenna arrays in many modern communication networks absorb waves generated from multiple point sources. An analytical formula was derived to improve the signal to interference and noise ratio (SINR) obtained from the steering errors of the two beamformers. The proposed MVDR processor-based beamforming does not enforce general constraints. Therefore, it can also be used in systems where the steering vector is compromised by gain. Simulation results show that the output of the proposed beamformer based on the MVDR processor is usually close to the ideal state within a wide range of signal-to-noise ratio and signal-to-interference ratio. The MVDR processor-based beamformer has been experimentally evaluated. The proposed processor-based MVDR system significantly improves performance for large interference white noise ratio (INR) in the sidelobe region and provide an appropriate beam pattern.

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Wide to multiband elliptical monopole reconfigurable antenna for multimode systems applications

Cited by 4 publications

References 24 publications

Miniaturized UWB elliptical patch antenna for skin cancer diagnosis imaging

Miniaturized UWB elliptical patch antenna for skin cancer diagnosis imaging

A multiband and wideband frequency reconfigurable slotted bowtie antenna

Discrete interferences optimum beamformer in correlated signal and interfering noise

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