Dual-Band Dual-Polarized Compact Bowtie Antenna Array for Anti-Interference MIMO WLAN

Abstract-A multi-band antenna with omnidirectional radiation performance is proposed, which consists of 9 elements to form the structure of hexagonal prism. According to the placement rule, the antenna elements can be divided into two groups, one of which is placed in parallel on spaced three surfaces of the prism and the other placed vertically on the remaining spaced three faces of the prism. Each parallel element consists of two coplanar microstrip radiating patches which are nested within each other for miniaturization. Two parallel microstrips connected by a grounded disc with shorting pin are placed between the two patches to optimize the isolations. Each vertical element consists of two improved dipoles with four arms and a BALUN located at the back of the substrate plate which constitutes the quasi-Yagi structure. The resonant frequencies of the proposed prismatic antenna are 3.45 GHz, 4.9 GHz, 5.8 GHz and 15.2 GHz which can be used for low frequency bands of the fifth generation (5G) wireless communications and wireless local area networks (WLAN) as well as satellite communication applications.

Section: Results For the Hexagonal Prism Shaped Antennamentioning

confidence: 86%

“…An 18-port MIMO has been proposed in [6] which consists of six tri-polarization antenna elements with three ports mounted on six faces of a cube. A dual-band dual-polarized compact bowtie dipole antenna array for MIMO WLAN is proposed in [7], which consists of 12 antenna elements. Ref.…”

Section: Introductionmentioning

confidence: 99%

Multi-Band Omnidirectional Antenna With Hexagonal Prism Shape for Mimo Applications

Wang¹,

Tang²,

Zhang³

2017

“…Meanwhile, the antenna is compact in size, simple in structure and easy to fabricate. The proposed antenna is smaller in size than the antenna reported in [11][12][13].…”

Section: Introductionmentioning

confidence: 83%

“…In [11], a dual-band MIMO antenna with high port isolation by using an array of printed capacitively loaded loops (CLLs) on the antenna is proposed. A dual-band polarized bowtie antenna array for MIMO WLAN is presented in [12], and a dual-band MIMO antenna with high isolation is proposed by introducing two transmission lines on the top surface of the substrate and etching two slots on the ground [13]. Though good decoupling effect is achieved, such technologies in [11][12][13] require a significant amount of space.…”

Section: Introductionmentioning

confidence: 99%

Compact Dual-Band Mimo Antenna With High Port Isolation for Wlan Applications

Qin¹,

Liu²

2014

Abstract-A compact dual-band MIMO antenna with high port isolation for WLAN applications is proposed. The proposed antenna is basically composed of two monopoles and designed at 2.4/5.2 GHz. High port isolation is achieved by introducing a T-shaped junction on the top surface of the substrate and etching two slots on the ground. The measured bandwidth of the proposed antenna are 2.34-2.55 GHz and 5.13-5.85 GHz, which are suitable for WLAN applications, and the measured isolation between the two monopoles is higher than 20 dB in both bands. Meanwhile, the envelope correlation coefficient of the antenna at both operating bands is lower than 0.001, which means that the antenna has high diversity gain. Good agreement is achieved between the predicted result and the measured data. The overall size of the proposed antenna is 38 mm × 43 mm × 1.6 mm.

“…It can be clearly observed that a third resonant frequency f3 appears on the higher end of the two original ones in Antenna C, which does not have the T-shape component, and only f 3 is dominated by the location of the T-shape component in such a way that f 3 gets lower when l T d gets larger, which means a longer extra path for the current flowing would shift the resonant frequency f 3 lower. To achieve the maximum operating bandwidth with the optimized performance for the 3.5 GHz band, l T d = 7.13 mm is chosen, with the simulated impedance bandwidth as 27.8% from 3.13 GHz to 4.14 GHz (VSWR < 1.5), which is significant improvement over those reported slot antenna [17] and Bowtie antenna [18] used in MIMO array. …”

Section: Antenna Elementmentioning

confidence: 99%

A Scalable Compact Wideband Dual-Polarized Printed Dipole Antenna for Base Station Applications

Tang¹,

Cao²,

Ho³

2017

Abstract-A novel compact wideband dual-polarized printed dipole antenna for base station application is presented. The proposed antenna is composed of four assembled substrates. Two pairs of identical arrow-shaped conductive lines on the tophat substrate form two orthogonal polarized dipoles. Two baluns connected with 50 Ω coaxial cables are integrated on another two vertical substrates to excite the dipoles. The other horizontal board at bottom provides grounding. A rectangular boxshaped reflector is also used to enhance its stability in radiation patterns over the operating frequencies. It achieves 22% size reduction from the conventional printed half-wavelength cross-dipole, and 43.2% impedance bandwidth (VSWR < 2), while maintaining a stable radiation pattern with measured CrossPolarization Degradation (XPD) better than −22 dB at boresight and an average peak gain of 8.4 dBi for a 65 • Azimuth Beamwidth base station application at 700/800/900 MHz bands. With the scalable miniature structure, it may also find itself suitable for side-by-side multiband Multi-Input Multi-Output (MIMO) or Large-Scale Antenna (LSA) 5G base station applications. A 4 × 4 array prototype of the LSA is also designed and fabricated, and it achieves 27.8% impedance bandwidth (VSWR < 1.5) with well decorrelated element performance and array XPD better than −20 dB across as large as 30 • tilting range.