Reduction of mutual coupling between closely-packed antenna elements using defected ground structure

Zhu, Fuguo; Jia-dong, XU; Xu, Qifa

doi:10.1049/el.2009.0985

Cited by 146 publications

(21 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(3) From the view of bandgap, the stepped slot on the middle ground makes the resonant frequency of the proposed antenna fall inside the bandgap of the stepped slot. Consequently, surface waves are effectively suppressed, and the isolation between the two antennas is improved then [18].…”

Section: The Decoupling Effect Of the Three-level Stepped Slotmentioning

confidence: 99%

Compact Uwb Mimo Ground Linearly Tapered Slot Antenna Decoupled by a Stepped Slot

Huang¹,

Xiao²

2017

PIER C

View full text Add to dashboard Cite

Abstract-A very compact ultra-wideband (UWB) multiple-input-multiple-output (MIMO) ground linearly tapered slot Antenna (LTSA) is presented in this paper. On a cost-effective FR4 substrate, it consists of a ground plane and two microstrip feedlines. Its overall dimension is only 22 × 26 mm 2 . To miniaturize the dimension of the antenna, two linearly tapered slots on the ground plane act as the main radiator. Then it does not need extra large radiation patch. In particular, a simple embedded threelevel stepped slot on the central ground, brings high isolation in the whole UWB band. In addition, two rectangular slots cut in the feedlines widen the impedance bandwidth. Simulated and measured results verify S 11 < −10 dB and S 12 < −18 dB at 3.1 GHz −12 GHz and good diversity performance. Therefore, the proposed MIMO antenna has potential for portable devices applications.

show abstract

Section: The Decoupling Effect Of the Three-level Stepped Slotmentioning

confidence: 99%

Compact Uwb Mimo Ground Linearly Tapered Slot Antenna Decoupled by a Stepped Slot

Huang¹,

Xiao²

2017

PIER C

View full text Add to dashboard Cite

show abstract

“…However, this is not a recommended alternative as the physical size of the device is limited by practical considerations. Another option to reduce the mutual coupling between antennas is to use additional slit patterns or coupling elements; however, this requires almost complete redesign of a conventional repeater antenna system [4]. For high isolation, the two linearly polarized antennas are aligned along orthogonal (vertical and horizontal) directions to each co-polarized component and are positioned at the center of each reflector.…”

Section: Introductionmentioning

confidence: 99%

“…However, when this structure is applied to the indoor repeater antenna, it is difficult to maintain the peak gain owing to the degradation of a radiation pattern. The defected ground structure is presented to improve the isolation between a pair of closely packed Planar Inverted-F Antennas (PIFAs), patches, and monopole antennas on the common ground plane [4,13,14]. This structure can obtain a band-stop effect due to the combination of an inductance and a capacitance, so that it applies to antenna designs to suppress the harmonics and the cross-polarizations.…”

Section: Introductionmentioning

confidence: 99%

A Study on Improved Isolation of Indoor Repeating Antenna using Metamaterial Absorber for WCDMA System

Kim

Youngjoo²,

Seo

2013

Journal of Electrical Engineering and Technology

View full text Add to dashboard Cite

-This paper proposes a novel design for a compact, high-isolation WCDMA indoor repeater antenna. The proposed antenna consists of a patch antenna and metamaterial absorber. The required WCDMA bandwidth is obtained by utilizing the coupling between the main and the parasitic patches. In addition, high isolation is achieved using the metamaterial absorber, which has an absorption of about 98% at 2.1 GHz. Overall, the proposed antenna has a gain of over 7 dBi, a Voltage Standing Wave Ratio (VSWR) of less than 2, more than 85 dB of isolation between the service and donor antennas over the WCDMA band and a total volume of the proposed antenna only 70 mm × 70 mm × 43.8 mm.

show abstract

“…Many techniques for improving isolation between antennas have been reported [7]- [11]. A defected ground structure (DGS) [7], a mushroom-like electromagnetic band-gap (EBG), [8], and a ground modification [9] have all been suggested to suppress the ground current flowing between antenna elements.…”

Section: Introductionmentioning

confidence: 99%

“…A defected ground structure (DGS) [7], a mushroom-like electromagnetic band-gap (EBG), [8], and a ground modification [9] have all been suggested to suppress the ground current flowing between antenna elements. However, each of these techniques requires a large area.…”

Section: Introductionmentioning

confidence: 99%

Small Internal Antenna Using Multiband, Wideband, and High-Isolation MIMO Techniques

Kim¹

2013

ETRI J

View full text Add to dashboard Cite

In this paper, a small internal antenna for a mobile handset is presented using multiband, wideband, and high-isolation multiple-input multiple-output techniques. The proposed antenna consists of three planar inverted-F antennas (PIFAs) that operate in the global system for mobile communication (GSM900), the digital communication system (DCS), the personal communication system (PCS), the universal mobile telecommunication system (UMTS), and wireless local area network (WLAN) bands with a physical size of 40 mm × 10 mm × 10 mm. A resonator attached to the folded PIFA creates dual resonances, achieving a wide bandwidth of approximately 460 MHz, covering the DCS, PCS, and UMTS bands; a meander shorting line is used to improve impedance matching. Additionally, a modified neutralization link is embedded between diversity antennas to enhance isolation, which results in a 6-dB improvement in the isolation and less than 0.1 in the envelope correlation coefficient evaluated from the far-field radiation patterns. Simulation and measurements demonstrate very similar results for Sparameters and radiation patterns. Peak gains show 3.73 dBi, 3.77 dBi, 3.28 dBi, 2.15 dBi, and 5.86 dBi, and antenna efficiencies show 56.15%, 72.15%, 68.59%, 52.92%, and 82.93% for GSM900, DCS, PCS, UMTS, and WLAN bands, respectively.

show abstract

Reduction of mutual coupling between closely-packed antenna elements using defected ground structure

Cited by 146 publications

References 6 publications

Compact Uwb Mimo Ground Linearly Tapered Slot Antenna Decoupled by a Stepped Slot

Compact Uwb Mimo Ground Linearly Tapered Slot Antenna Decoupled by a Stepped Slot

A Study on Improved Isolation of Indoor Repeating Antenna using Metamaterial Absorber for WCDMA System

Small Internal Antenna Using Multiband, Wideband, and High-Isolation MIMO Techniques

Contact Info

Product

Resources

About