Design of Wideband Multi-Ring Microstrip Antennas Fed by an L-Probe for Single-Band and Dual-Band Operations

Furukawa, Kohei; Saito, Sakuyoshi; Kimura, Yuichi; Fukunaga, Takanobu

doi:10.1109/ieeeconf35879.2020.9329487

Cited by 16 publications

(4 citation statements)

References 3 publications

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“…A 12-element TCCA in Fig. 3 is taken as the example to evaluate the ODASL model, where it works at 3.5 GHz [16]. The elements are placed on a cylindrical substrate with a radius r a = 800 mm and a relative dielectric constant of ε r = 2.65.…”

Section: Numerical Resultsmentioning

confidence: 99%

Outlier Detection-aided Supervised Learning for Modeling of Thinned Cylindrical Conformal Array

Hong,

Shao,

et al. 2024

ACES Journal

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In this paper, a scheme of outlier detection-aided supervised learning (ODASL) is proposed for analyzing the radiation pattern of a thinned cylindrical conformal array (TCCA), considering the impact of mutual coupling. The ODASL model has the advantage in speed improvement and memory consumption reduction, which enables a quick generation of the synthesis results with good generalization. The utilization of the active element pattern (AEP) technique in the model also contributes to the prediction of the array performance involving mutual coupling. The effectiveness of the ODASL model is demonstrated through a numerical example of the 12-element TCCA.

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Section: Numerical Resultsmentioning

confidence: 99%

Outlier Detection-aided Supervised Learning for Modeling of Thinned Cylindrical Conformal Array

Hong,

Shao,

et al. 2024

ACES Journal

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“…The higher order resonance is used because at lower resonant frequencies the side of the square slots to achieve UWB results in a larger slot size which results in a larger back lobe [30]. The addition of the square ring slots reduces the side lobes and creates additional resonant frequencies [31], [32]. At the end of step 2 the single unit antenna achieves wideband resonances at 8.4 GHz and 9 GHz along with multiband resonances at 5.2 GHz, 5.7 GHz, 7.7 GHz, and 9.8 GHz as can be seen in Fig.…”

Section: A Single Unit Antenna Designmentioning

confidence: 99%

4×4 UWB Phased Array Antenna With >51° Far-Field Scanning Range for Wireless Power Transfer Application

Patwary,

Mahbub

2024

IEEE Open J. Antennas Propag.

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Wireless power transfer (WPT) using far-field microwave radiation beam can be used to power unmanned aerial vehicles (UAVs) thus eliminating the need to land on the ground to charge. In a distributed WPT system, impulse radio ultrawideband (IR-UWB) signals can provide continuous power at the receiver end with a high rectification efficiency. Such far-field based distributed WPT systems require high gain ultrawideband (UWB) antenna arrays with a unidirectional radiation patterns and beam steering capability. This paper proposes a 4 × 4 phased array antenna with an ultrawideband (UWB) operating frequency range of 7.5 − 8.5 GHz and 20.9 dBi gain. The novelty of this work lies in the design of a single unit antenna to achieve UWB operation while maintaining high gain and unidirectional radiation pattern. Another contribution of this work is the determination of the array element spacing based on the theoretical modeling and simulation and measurement based validation to achieve the highest gain, minimum coupling coefficient, and lower side lobe level (SLL). In order to achieve beam steering, each 2 × 2 subarray is considered as a single quadrant thus dividing the 4 × 4 phased array antenna into four quadrants where all 16 single elements are individually fed. The far-field radiation beam is steered by controlling the phase difference between each quadrant. The proposed phased array antenna achieves a scanning range > 51 • with 28 • half power beam width (HPBW), gain ranging from 15.4 dBi to 20.9 dBi, and a maximum scanning loss of 2.8 dB over the UWB operating frequency range.

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“…Multiring MSAs fed by an L-probe shows good characteristics as a multi-band planar antenna [3,4]. The one-ring MSA fed by an L-probe for single-band operation that uses a dielectric substrate having a thickness of about 0.14 wavelengths at the center frequency can provide a relative bandwidth (−10 dB or less of reflection) of about 46% [5,6] and the two-ring MSA for dual-band operation can provide relative bandwidths of about 20.3% and 15.7% for the first and second modes [7,8,9]. These antennas are designed for single linear polarization.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we examine the dual-band and wideband MSA for dual linear polarizations. Two L-probes are arranged at the orthogonal positions of the dualband and wideband two ring MSA [9]. The advantage of the proposed antenna is simple and compact structure.…”

Section: Introductionmentioning

confidence: 99%

Radiation properties of a linearly dual-polarized dual-band and wideband multi-ring microstrip antenna fed by two L-probes

2021

Self Cite

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This paper presents a linearly dual-polarized dual-band and wideband multi-ring microstrip antenna fed by two L-probes. The proposed antenna consists of two circular ring patches and two L-probes arranged in a multi-layered dielectric substrate. By using a thick substrate for the L-probe and arranging two ring patches as radiation elements, the proposed antenna exhibits wideband and dual-band characteristics. Furthermore, by arranging two L-probes at the orthogonal positions, the proposed antenna can operate as a linearly dual-polarized planar antenna. The measured fractional bandwidths corresponding to a reflection coefficient below −10 dB were 21.7% and 10.6% for the first and second modes, respectively. The measured isolation between two ports of the test antenna in the above bandwidths were larger than 13 dB.

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Design of Wideband Multi-Ring Microstrip Antennas Fed by an L-Probe for Single-Band and Dual-Band Operations

Cited by 16 publications

References 3 publications

Outlier Detection-aided Supervised Learning for Modeling of Thinned Cylindrical Conformal Array

Outlier Detection-aided Supervised Learning for Modeling of Thinned Cylindrical Conformal Array

4×4 UWB Phased Array Antenna With >51° Far-Field Scanning Range for Wireless Power Transfer Application

Radiation properties of a linearly dual-polarized dual-band and wideband multi-ring microstrip antenna fed by two L-probes

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