Implementation of Broadband Isolator Using Metamaterial-Inspired Resonators and a T-Shaped Branch for MIMO Antennas

Hsu, Chih-Chun; Lin, Ken‐Huang; Su, Huey‐Jen

doi:10.1109/tap.2011.2163741

Cited by 103 publications

(56 citation statements)

References 16 publications

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“…This modeling is called TEM waveguide [16] (Figure 1(b)). This model is simulated by different numerical methods, such as FDTD [17] and mode matching technique [18][19][20][21], to get the scattering parameters of the main structure. Using the TEM waveguide modeling shows that a metasurface element has the role of a transverse discontinuity in hypothesis waveguide [18].…”

Section: Modal Analysis Of Metasurfacementioning

confidence: 99%

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Analytical Investigation Into the S-Parameters of Metamaterial Layers

Meybodi¹,

Paran²

2016

PIER B

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Abstract-Making use of mode matching method, a theoretical analysis of a metamaterial layer is presented. The unit cell of the structure is modeled by a TEM waveguide, and the metamaterial element is supposed as a discontinuity in the waveguide. Analyzing the structure using this model, mathematical relations between s-parameters of a metasurface are extracted. It is evident that the variation of each s-parameter is limited to an arc of circle on Smith chart. The key factors determining the location of each circle on plane are specified. Moreover, a discussion on the role of metasurface element in the determination of s-parameters of the structure is given. The variations of scattering transfer parameters on the plane are determined, too. The steps needed to derive these relations are described. Using these relations, simple and straightforward formulas are devised which can be used to predict the response of the metasurface. Finally, some metasurfaces will be analyzed by full-wave method. The new relations are well-agreed with simulation results.

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Section: Modal Analysis Of Metasurfacementioning

confidence: 99%

“…The TEM waveguide supports all TEM, TE and TM modes. The transverse component of electromagnetic fields for these modes are as follows [16][17][18][19][20][21].…”

Section: Mode Matching Techniquementioning

confidence: 99%

Analytical Investigation Into the S-Parameters of Metamaterial Layers

Meybodi¹,

Paran²

2016

PIER B

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“…Many related kinds of literature have been reported recently, mutual coupling reduction is usually accomplished by introducing parasitic structure performing as a band-stop filter [2], utilizing defected ground structure [3] or a modified ground plane [4] to restrain the surface wave propagation, employing metamaterial technology to control propagation characteristics [5,6], and using a neutralization line to cancel the initial current [7,8,9]. These methods can effectively reduce the mutual coupling to less than −15 dB.…”

Section: Introductionmentioning

confidence: 99%

A decoupling method between two tri-band antennas for WLAN/WiMAX applications

Luo

Hong

Amin

2017

IEICE Electron. Express

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A decoupling method between two tri-band antennas for WLAN/WiMAX applications is presented. A monopole is first designed with tri-band characteristic; three resonating frequencies are generated by three separate resonators. Then, two tri-band monopoles are employed to develop a MIMO antenna system. The resonators of low band can reduce the mutual coupling for two higher bands by suppressing surface wave propagation. Finally, coupling reduction at low band is achieved by a Ω-shaped metal line to neutralize original coupling. The proposed MIMO antenna covers the 2.4/5.8 GHz WLAN and 3.5 GHz WiMAX bands, with the measured mutual coupling lower than −18 dB.

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“…Several methods have been proposed to improve the isolation of multi-antenna system [9,10], including orthogonal placement of the antenna elements [11], separating the elements with additional structure or slits, such as EBG [12], and using network between elements.…”

Section: Introductionmentioning

confidence: 99%

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

Wang¹,

Tang²,

Zhang³

2017

PIER C

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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.

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Implementation of Broadband Isolator Using Metamaterial-Inspired Resonators and a T-Shaped Branch for MIMO Antennas

Cited by 103 publications

References 16 publications

Analytical Investigation Into the S-Parameters of Metamaterial Layers

Analytical Investigation Into the S-Parameters of Metamaterial Layers

A decoupling method between two tri-band antennas for WLAN/WiMAX applications

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

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