Mode-Controlled Wideband Slot-Fed Ground Radiation Antenna Utilizing Metal Loads for Mobile Applications

Qu, Longyue; Zhang, Rui; Shin, Hyunwoong; Kim, Jihoon; Kim, Hyeongdong

doi:10.1109/tap.2016.2632519

Cited by 19 publications

(36 citation statements)

References 29 publications

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“…From the above analysis, we can observe the following: The antenna impedance, particularly the radiation resistance, is significantly influenced by coupling to the ground modes, that is, a small mobile antenna operates as a ground radiation antenna; and The radiation performance can be optimized when the ground mode resonance is equal to the antenna operating frequency …”

Section: Theoretical Analysis Of Small Antennasmentioning

confidence: 99%

“…The radiation performance can be optimized when the ground mode resonance is equal to the antenna operating frequency. 12,13,26 In MIMO applications, however, severe isolation and correlation issues are introduced when both antennas are utilizing the same dominant mode of the ground plane. Previous analysis of the decoupling mechanism of decouplers based on a three-port network 9,22 is insufficient to develop effective and efficient decouplers, which can maintain the antennas' high efficiency and wideband performance while improving their isolation simultaneously.…”

Section: Theoretical Analysis Of Small Antennasmentioning

confidence: 99%

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Compact wideband MIMO mobile‐antenna system design using mode‐based decoupling techniques

Piao

Kim

2019

Int J RF Microw Comput Aided Eng

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This work focuses on designing small mobile antennas and their multiple‐input multiple‐output (MIMO) applications. In this study, it was investigated that small mobile antennas can obtain high radiation performance only when a tight coupling with the ground plane is generated through ground‐mode tuning (GMT) of the ground plane. Furthermore, a novel mode‐based decoupling concept is presented for their MIMO applications, based on a four‐port network and by considering the ground‐mode effect. Consequently, the proposed mode‐based decouplers can effectively sustain high radiation performance and improve the isolation while providing low correlation by generating diagonally directed radiation patterns. In the proposed MIMO system, both GMT structures and mode‐based decouplers are implemented utilizing the metal rims around the ground plane, thereby occupying very compact clearance, and the measured MIMO antennas fully covered 0.69 to 1 GHz band with high isolation up to 20 dB and low envelope correlation coefficient (ECC) value below 0.5, sufficiently applicable in mobile devices.

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Section: Theoretical Analysis Of Small Antennasmentioning

confidence: 99%

Section: Theoretical Analysis Of Small Antennasmentioning

confidence: 99%

Compact wideband MIMO mobile‐antenna system design using mode‐based decoupling techniques

Piao

Kim

2019

Int J RF Microw Comput Aided Eng

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“…Dual‐band configurations of GradiAnt were presented in References , whereas triple‐band GradiAnts for GPS and Wi‐Fi bands were proposed in References . The bandwidth and radiation efficiency of the antenna can be improved by installing ground mode tuning (GMT) structures at the edges of the ground plane . Moreover, an additional loop‐type structure can be etched in the ground plane for the enhancement of the antenna performance .…”

Section: Introductionmentioning

confidence: 99%

A wideband loop‐type ground radiation antenna using ground mode tuning and optimum impedance level

Hassan

Zahid

Khan

et al. 2019

Micro & Optical Tech Letters

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In this article, a wideband loop‐type ground radiation antenna is proposed for USB dongle applications. Wide bandwidth has been achieved using the orientation of the antenna embedded in the ground plane along with the impedance level of the feed structure. The ground clearance of the antenna is utilized so that the ground mode is tuned to the mid‐band frequency. The impedance level is controlled by using a series combination of a lumped inductor and a capacitor in the feed loop of the antenna. A good agreement between measured and simulated results has been observed. The measured bandwidth and peak total efficiency of the antenna are 1180 MHz and 88.27%, respectively.

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“…In References 2, 3, 7, 8, these antennas suffer from worse radiation gains that are less than 2 dBi at lower frequency, typically around 3 GHz, because of scarce coupling between the antenna and the ground plane when the ground size is limited. High radiation performance can be realized when the resonant frequencies of the antenna and ground plane are nearly equal . Therefore, to overcome the aforementioned shortcomings, it is desirable to design a UWB MIMO antenna with improved radiation gains and isolation performances over the whole UWB frequency band.…”

Section: Introductionmentioning

confidence: 99%

A planar UWB MIMO antenna with gain enhancement and isolation improvement for the 5G Mobile platform

Jin

Yeonjeong

et al. 2018

Micro & Optical Tech Letters

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A planar ultra‐wide band (UWB) multi‐input multi‐output (MIMO) antenna with gain enhancement and isolation improvement for the 5G mobile platform is proposed. The proposed antenna consists of two planar UWB low‐band antenna elements: a compact multi‐loop antenna and a ground‐slotted planar inverted F antenna (PIFA) located on the opposite side of the rectangular ground plane. These two antennas satisfy the 10‐dB return loss bandwidth from 2.90 to 6.94 GHz for multi‐loop antenna and from 2.79 to 7.23 GHz for slotted PIFA antenna, respectively. A high isolation level of greater than 20 dB is realized without applying any additional decoupling structures. The realized gains are larger than 2.9 dBi. The experimental and simulated results of the proposed antenna are in good agreement with each other.

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Mode-Controlled Wideband Slot-Fed Ground Radiation Antenna Utilizing Metal Loads for Mobile Applications

Cited by 19 publications

References 29 publications

Compact wideband MIMO mobile‐antenna system design using mode‐based decoupling techniques

Compact wideband MIMO mobile‐antenna system design using mode‐based decoupling techniques

A wideband loop‐type ground radiation antenna using ground mode tuning and optimum impedance level

A planar UWB MIMO antenna with gain enhancement and isolation improvement for the 5G Mobile platform

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