Wide and Dual-Band MIMO Antenna with Omnidirectional and Directional Radiation Patterns for Indoor Access Points

This paper proposes a dual band reconfigurable microstrip slotted antenna for supporting the wireless local area network (WLAN) and worldwide interoperability for microwave access (WiMAX) applications, providing coverage where both directive and omni-directive radiations are needed. The design consists of a feedline, a ground plane with two slots and two gaps between them to provide the switching capability and a 1.6 mm thick flame retardant 4 (FR4) substrate (dielectric constant Ɛ=4.3, loss tangent δ=0.019), modeling an antenna size of 30x35x1.6 mm3. The EM simulation, which was carried out using the connected speech test (CST) studio suite 2017, generated dual wide bands of 40% (2-3 GHz) with -55 dB of S11 and 24% (5.2-6.6 GHz) higher than its predecessors with lower complexity and -60 dB of S11 in addition to the radiation pattern versatility while maintaining lower power consumption. Moreover, the antenna produced omnidirectional radiation patterns with over than 40% bandwith at 2.4 GHz and directional radiation patterns with 24% bandwith at the 5.8 GHz band. Furthermore, a comprehensive review of previously proposed designs has also been made and compared with current work.

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A Novel Dual-Band MIMO Antenna with Lower Correlation Coefficient

International Journal of Antennas and Propagation ◽

10.1155/2012/512975 ◽

2012 ◽

Vol 2012 ◽

pp. 1-7 ◽

Cited By ~ 4

Author(s):

Jian Zhang ◽

Jun OuYang ◽

Kai Zhi Zhang ◽

Feng Yang

Keyword(s):

Correlation Coefficient ◽

Free Space ◽

Dual Band ◽

Radiation Patterns ◽

Commercial Software ◽

Matching Effect ◽

Mimo Antenna ◽

Lower Band ◽

Lower Correlation ◽

Peak Gain

This paper demonstrates a novel dual-band operated MIMO antenna which consisted of planar monopole (main antenna) and 3D slot element (auxiliary antenna). The main antenna is printed on a 1.6 mm thick FR4 board, while the auxiliary antenna is fabricated with gold-coated copper. A lumped impedance network is applied to enhance matching effect at port1. From simulations by commercial software, it can be found that the proposed antenna is able to cover GSM800, GSM900 (lower band), and LTE/ WiMAX/WLAN (higher band) quite well. Good agreements between simulations and measurements are obtained. Corresponding measured results, antenna efficiency, peak gain, and radiation patterns, are presented at the same time. By equipping a passive decoupling element, the coupling power on the ground is radiated into free space, and great enhancement of isolation between antenna elements, especially for lower band, is achieved.

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A low profile dual-band DRA-based MIMO antenna system for wireless access points

2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting ◽

10.1109/aps.2015.7304740 ◽

2015 ◽

Cited By ~ 4

Author(s):

Mohammad S. Sharawi ◽

Symon K. Podilchak ◽

Yahia M.M. Antar

Keyword(s):

Antenna System ◽

Wireless Access ◽

Dual Band ◽

Access Points ◽

Mimo Antenna ◽

Low Profile

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Ultra-Compact Three-Port MIMO Antenna With High Isolation and Directional Radiation Patterns

IEEE Antennas and Wireless Propagation Letters ◽

10.1109/lawp.2014.2344104 ◽

2014 ◽

Vol 13 ◽

pp. 1545-1548 ◽

Cited By ~ 19

Author(s):

Han Wang ◽

Longsheng Liu ◽

Zhijun Zhang ◽

Yue Li ◽

Zhenghe Feng

Keyword(s):

Radiation Patterns ◽

Mimo Antenna ◽

High Isolation ◽

Directional Radiation

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Bandwidth enhancement of dual-band bi-directional microstrip antenna using complementary split ring resonator with defected structure for 3/5 GHz applications

International Journal of Electrical and Computer Engineering (IJECE) ◽

10.11591/ijece.v12i2.pp1683-1694 ◽

2022 ◽

Vol 12 (2) ◽

pp. 1683

Author(s):

Charernkiat Pochaiya ◽

Srawouth Chandhaket ◽

Prapan Leekul ◽

Jhirat Mearnchu ◽

Tanawut Tantisopharak ◽

...

Keyword(s):

Ring Resonator ◽

Split Ring Resonator ◽

Dual Band ◽

Radiation Patterns ◽

Split Ring ◽

Bandwidth Enhancement ◽

Complementary Split Ring Resonator ◽

Microstrip Patch ◽

Directional Radiation ◽

Dual Bandwidth

This paper presents a bandwidth enhancement of a dual-band bi-directional rectangular microstrip patch antenna. The novelty of this work lies in the modification of conventional rectangular microstip patch antenna by using the combination of two techniques: a complementary split ring resonator (CSRR) and a defected patch structure (DPS). The structure of antenna was studied and investigated via computer simulation technology (CST). The dimension and position of CSRR on the ground plane was optimized to achieve dual bandwidth and bi-directional radiation pattern characteristics. In addition, the bandwidths were enhanced by defecting suitable shape incorporated in the microstrip patch. A prototype with overall dimension of 70.45×63.73 mm2 has been fabricated on FR-4 substrate. To verify the proposed design, the impedance bandwidth, gain, and radiation patterns were carried out in measurements. The measured impedance bandwidths were respectively 560 MHz (3.08-3.64 GHz) and 950 GHz (4.64-5.59 GHz) while the measured gains of each bandwidth were respectively 4.28 dBi and 4.63 dBi. The measured radiation patterns were in good agreement with simulated ones. The proposed antenna achieves wide dual bandwidth and bi-directional radiation patterns performances. Consequently, it is a promising candidate for Wi-Fi or 5G communications in specific areas such as tunnel, corridor, or transit and rail.

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A Dual-Band LTCC Antenna with Cross Circuitous Structure

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.601.163 ◽

2012 ◽

Vol 601 ◽

pp. 163-167

Author(s):

Hong Gang Hao ◽

Wen Shuai Hu ◽

Hai Yan Tian ◽

Yi Ren

Keyword(s):

Low Temperature ◽

Frequency Band ◽

Dual Band ◽

Operating Frequency ◽

Impedance Bandwidth ◽

The Novel ◽

Radiation Patterns ◽

Directional Radiation ◽

Dual Band Antenna ◽

Layer Structures

A compact dual-band antenna for ISM (2.45GHz) or WiMAX (3.15GHz) applications by low-temperature co-fired ceramic (LTCC) technology is presented in this paper. The proposed antenna is composed of multi-layer structures to reduce the sizes effectively. The simulated results show that the dimensions of the antenna are 11×4.2×1.2mm3, with the 2:1 VSWR impedance bandwidth definition, the lower and upper band have the bandwidth of 80 and 90 MHz. The novel antenna has realized miniaturization and omni-directional radiation patterns across the whole operating frequency band.

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