A 28-GHz Wideband 2×2 U-Slot Patch Array Antenna

This article presents a millimeter‐wave (mmWave) microstrip patch antenna (MPA) with a vertically coupled split ring metaplate (VCSRM). The narrow bandwidth and low gain of MPA are improved using VCSRM by periodically arranging split rings on the front and backsides of a dielectric slab. Numerical and experimental results show that the proposed antenna attains good radiation pattern, a high gain of 11.94 dBi, and a measured fractional bandwidth covering 26.58 to 29.31 GHz (9.77%). The gain of the antenna is increased by 5.35 dBi and the bandwidth is improved by 3.87% when compared to MPA without VCSRM. Thus, the proposed antenna with a small size of 18 × 22 mm2 is suitable for mmWave applications.

Section: Simulation and Measurement Resultsmentioning

confidence: 99%

“…Many studies have been done on antennas to satisfy these requirements. The Array antennas have improved bandwidth and gains . The multiple‐input and multiple‐output (MIMO) antenna can obtain high‐speed data transfer rates despite having a low gain .…”

Section: Introductionmentioning

confidence: 99%

Millimeter‐wave microstrip patch antenna using vertically coupled split ring metaplate for gain enhancement

Jeong

Hussain

Park

et al. 2019

“…Patch antennas are typical directional antennas with an appropriate low profile, low cost, and simple structure, which is well suited for use as an antenna element in portable direction‐finding systems. However, patch antennas have narrow band characteristics, and various bandwidth enhancement efforts have been made, including methods of controlling the current path on the patch surface such as slotted patches and slotted ground . A recent report shows that the broadband and the miniaturization of a patch antenna are derived by applying an indirect feed structure using an L‐shaped probe and a shorted patch structure .…”

Section: Introductionmentioning

confidence: 99%

“…However, patch antennas have narrow band characteristics, and various bandwidth enhancement efforts have been made, including methods of controlling the current path on the patch surface such as slotted patches and slotted ground. [9][10][11] A recent report shows that the broadband and the miniaturization of a patch antenna are derived by applying an indirect feed structure using an L-shaped probe and a shorted patch structure. 12 However, the L-shaped probe of the wire structure is limited in generating a stable and sufficient mutual coupling coefficient between the patch and the probe in L-band applications.…”

Section: Introductionmentioning

confidence: 99%

Design of a 16‐element array antenna with a planar L‐shaped probe for a direction of arrival estimation of the unidentified broadband signal

Jang

Yoo

Wang

et al. 2019

This article proposes the design of a 16‐element array antenna with a planar L‐shaped probe for a direction of arrival (DoA) estimation of an unidentified broadband signal. The individual element of the proposed antenna consists of a shorted radiating patch and the planar L‐shaped probe for obtaining the broad matching characteristic, wide beamwidth, and miniaturization. The developed individual elements are adopted to implement a planar 4 × 4 array antenna and to verify beam scanning properties. To obtain the improved signal detection performance of the proposed array antenna, the optimal array spacing of the proposed antenna is determined by calculating a root mean square error (RMSE) and the side lobe level. The results demonstrate that the proposed 4 × 4 array antenna with the optimal array spacing is suitable for detecting the unidentified signals with low RMSEs in a given signal detection environment.

“…The first side lobes are down from the peak about 10 dB in the overall frequency band to obtain a sufficient side lobe level (SLL). In addition, we configure the adaptive beam‐forming system, including the phase shifter, to control the phase and amplifier to boost the power level. The phase difference of each antenna element is changed from 0° to 90° to obtain ±30°of the scan beam angles.…”

Section: Introductionmentioning

confidence: 99%

Design of a broadband beam‐forming antenna for emergence detection and rescue applications

Yeom

Park

Jung

2018

A broadband beam‐forming antenna is designed for intelligent emergency detection and rescue systems. Recognizing emergencies hinges on identifying and analyzing the motion of humans. Combined with deep learning, the radio frequency signal of an antenna can capture the motion of humans behind a wall and in closed rooms using frequency‐modulated carrier wave (FMCW) signals operating in broadband from 5.56 GHz to 7.25 GHz (26%). The beam‐forming antenna is composed of four slot‐coupled patch antennas. The proposed array antenna satisfies a broad FMCW bandwidth and sufficient gain over 15.8 dBi in the overall bandwidth. To extend the focusing capability, we specifically design a 4 × 1 array structure and optimize the distance of antenna to 32.9 mm (0.7 λ0). The antenna is compact enough to realize a handheld motion‐tracking device. The array antenna forms a fan beam with a wide beam coverage and low side lobe level. The motion of a human body is tracked as a beam scanning by the antenna array. To accomplish this goal with adaptive array architectures, we implement beam‐forming techniques with a phase shifter, an amplifier, and a power divider.