MIMO Mobile Handset Antenna Merging Characteristic Modes for Increased Bandwidth

Deng, Changjiang; Feng, Zhenghe; Hum, Sean V.

doi:10.1109/tap.2016.2537358

Cited by 102 publications

(60 citation statements)

References 24 publications

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“…From the useful design and results in reference , a capacitive exciter with a single feed, which is placed at the right side above the ground plane, can excite multiple resonant modes. Distributed coupling between the outer ring and the inner chassis part of the ground plane excites several Eigen modes.…”

Section: Antenna Designmentioning

confidence: 99%

Design of a multiband ground radiation antenna by utilizing balun excitation

Wang

Hsu

2018

Micro & Optical Tech Letters

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The design and performance of a triple‐band ground radiation antenna with a compact balun are shown in this paper. A microstrip balun is integrated with a modified rectangular ground plane has provided wideband frequency characteristics. With the help of the theory of the characteristic mode, the resonance phenomenon of the rectangular ground plane is analyzed. An eight‐like‐loop slit is embedded in the ground plane to excite multiple resonant modes. In, addition, by etching two rectangular slots at two terminals of the eight‐like‐loop slit, the capacitance of the ground‐plane resonator decreases such that the impedance‐matching condition in the upper‐frequency band can be improved. Finally, a triple‐band frequency performance is derived by embedding a simple matching circuit. The proposed antenna achieves the measured impedance bandwidths from 1.02 to 1.06, from 1.35 to 1.62, and from 1.96 to 2.55 GHz. The simulated current distributions of a ground‐plane prototype are also experimentally verified.

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Section: Antenna Designmentioning

confidence: 99%

Design of a multiband ground radiation antenna by utilizing balun excitation

Wang

Hsu

2018

Micro & Optical Tech Letters

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“…TCM brings a clearer insight into an antenna's physical behavior independent of the feeding arrangement by identifying the eigenmodes (characteristic modes) of the antenna structure. The handset antennas described in references [11][12][13] were analyzed using TCM to better adjust the antenna structure to make the antenna resonate at a certain frequency with high efficiency-up to 60%. Also, Sharma and Shanmugam employed a novel wideband modified Archimedean spiral antenna without a ground plane using TCM; hence, its radiation patterns are bidirectional as it radiates simultaneously in both directions [14].…”

Section: Of 10mentioning

confidence: 99%

“…The detailed parameters are tabulated in Table 1. The theory of characteristic modes (TCM) for antenna application has been studied recently to better understand the radiation principle [11][12][13][14][15][16][17][18][19][20][21][22]. TCM brings a clearer insight into an antenna's physical behavior independent of the feeding arrangement by identifying the eigenmodes (characteristic modes) of the antenna structure.…”

Section: Of 10mentioning

confidence: 99%

Design of a T-Shaped Antenna Based on Characteristic Mode Manipulation for Metal-Framed Handset Application

et al. 2018

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Recently, metal-framed handset antennas have aroused much attention due to their fantastic appearance and superior robustness. In this paper, a T-shaped antenna suitable for integration with a USB connector is proposed for metal-framed handset application by utilizing the theory of characteristic modes (TCM). Five eigenmodes, one for the lower band and four for the higher band, were merged by a T-shaped metal frame, a feed point, and two shorting pins, as well as three radio frequency (RF) switches so as to broaden the antenna's operating bandwidth. A prototype was fabricated in order to verify the design concept. Experimental results showed that the proposed antenna was able to cover bandwidths of 0.824-0.960 GHz (GSM band) and 1.710-2.690 GHz (DCS, PCS, UMTS, and LTE bands) with an acceptable radiation efficiency of up to 50% and satisfactory radiation patterns.

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“…Alternatively, several interesting designs have been reported based on characteristic mode theory (CMT) [8][9][10][11], a numerical eigenmode expansion that offers useful properties for MIMO such as orthogonal radiation fields [12]. These methods attempt to design feed schemes that excite the characteristic modes of a predefined antenna aperture (e.g., a rectangular conductor representing a phone chassis) as the characteristic modes are inherently decoupled.…”

Section: Introductionmentioning

confidence: 99%

A Shape-First, Feed-Next Design Approach for Compact Planar Mimo Antennas

Yang¹,

Zhou²,

Adams³

2019

PIER M

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Employing characteristic mode theory (CMT), a shape-first feed-next design methodology for compact planar antennas is proposed, which facilitates rapid and systematic design of self-matched, multi-port antennas with optimal bandwidth and high isolation. First, the optimal antenna shape with multiple self-resonant modes is synthesized using a binary genetic algorithm. Then, the optimal feed positions that provide good input matching and high isolation between the excitation ports are specified using a virtual probe modeling technique. A two-port microstrip antenna with an electrical size of 0.45λ d × 0.297λ d is designed, fabricated and measured. The measured operating frequency is within 1% of the full wave simulation, and the overall S parameter characteristics and far field patterns agree well with the simulation result, validating our design methodology. Mutual coupling S 21 < −35 dB at the center frequency is achieved in this design.

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MIMO Mobile Handset Antenna Merging Characteristic Modes for Increased Bandwidth

Cited by 102 publications

References 24 publications

Design of a multiband ground radiation antenna by utilizing balun excitation

Design of a multiband ground radiation antenna by utilizing balun excitation

Design of a T-Shaped Antenna Based on Characteristic Mode Manipulation for Metal-Framed Handset Application

A Shape-First, Feed-Next Design Approach for Compact Planar Mimo Antennas

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