A Planar Printed Nona-Band Loop-Monopole Reconfigurable Antenna for Mobile Handsets

Liu, Yu; Liu, Peiqin; Zhang, Meng; Wang, Lifeng; Li, Yue

doi:10.1109/lawp.2018.2856459

Cited by 43 publications

(20 citation statements)

References 16 publications

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“…First, concerninng the input characteristics of the proposed antenna, to highlight the importance of the slots at the center of the substrate as mentioned above, we focus on the variation of VSWR when changing the slot length ls and the slot width ws. Similar to [3,8,15,18], and our previous works [39,40,41], in this letter we also use the criterion of VSWR ≤ 3 (|S 11 | ≤ −6 dB) to evaluate the resonant bandwidth of the antenna.…”

Section: Input Characteristicsmentioning

confidence: 99%

“…The diversification of smart wireless devices in recent years has been the strongest motivation for the rapid development of various studies on printed antennas [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37]. Generally, these antennas can be categorized by the authors into several types such as patches [10,11,12], monopoles [13,14,15,16,17,18,19,20], or dipoles [21,22,…”

Section: Introductionmentioning

confidence: 99%

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A simple printed antenna with broadband property and omnidirectional radiation patterns of wire dipole

Nguyen

Takizawa

et al. 2020

IEICE Electron. Express

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This letter presents a unique printed dipole antenna which can roughly cover an 80% fractional bandwidth (VSWR ≤ 3), and especially possess the omnidirectional radiation patterns similar to those of wire dipole antenna at its all resonant modes. The antenna is simple with a microstripfed structure which it is just composed of two arms with each one forming the shape of a conventional "inset-fed" rectangular patch antenna. At the lowest operation frequency for VSWR = 3, the antenna size is only 0.3λ × 0.008λ, showing its effectiveness in many applications of small antennas.

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Section: Input Characteristicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A simple printed antenna with broadband property and omnidirectional radiation patterns of wire dipole

Nguyen

Takizawa

et al. 2020

IEICE Electron. Express

View full text Add to dashboard Cite

show abstract

“…Mobile handsets are now an indispensable feature of modern life, and the demands for higher transmission rates are increasing [1,2,3]. Multiple input multiple output (MIMO) is a promising technology that can significantly improve the performance of wireless communication systems.…”

Section: Introductionmentioning

confidence: 99%

“…Equivalent capacitance between the IFA and the ground plane.IEICE Electronics Express, Vol.16, No.20,[1][2][3][4][5] …”

mentioning

confidence: 99%

A reconfigurable MIMO handset antenna employing liquid metal

Gao

Kelly

Zhang

et al. 2019

IEICE Electron. Express

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This paper presents a reconfigurable MIMO handset antenna based on liquid metal. The antenna covers the eight frequency bands of the LTE-A standard. This antenna comprises: a monopole element, a IFA element, and a dual-purpose L-shaped branch which is connected to the ground plane. The function of the L-shaped branch is to improve the isolation, within the low frequency band (698-960 MHz), between two elements. A strip of liquid metal which connects to the arm of the IFA, coordinated with the L-shaped branch, can be used to alter its resonant frequency. The operating principle of this strip is analysed using an equivalent capacitor model. The theory of characteristic mode is used to analyze the properties of proposed antenna. To validate the concept, a prototype antenna with size of 120 × 60 × 0.8 mm 3 was fabricated and measured.

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“…The design configuration of mobile phone antennas can be grouped into several main types such as loop antennas, reconfigurable antennas, slot antennas, monopole antennas, and metal boundary antenna . Although there are many design methods, it remains difficult to achieve a design with a profile height of less than 10 mm and a coverage of more than eight frequency bands.…”

Section: Introductionmentioning

confidence: 99%

A nona‐band narrow‐frame antenna with a defected ground structure for mobile phone applications

Pang

Zhu

et al. 2019

Micro & Optical Tech Letters

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A nona‐band narrow‐frame antenna with a defected ground structure for mobile phone applications is presented in this article. From the analysis of the structure, the coupled‐fed antenna mainly consists of four parts: bending feeding strip, coupling shorted strip, copper plate and defected ground structure. It can effectively cover LTE700/GSM850/GSM900/DCS1800/PCS1900/UMTS2100/LTE2300/LTE2500 and the ninth band on 3300‐4200 MHz (including LTE3500), which may be applied to the future 5G. The size of the nona‐band antenna is 80 × 7.5 × 5 mm3, and the defected ground structure is only 55 × 0.5 mm2. This structure effectively widens the bandwidth of the low‐frequency band and realizes 2G/3G/4G and possible coverage of the 5G operating band without loading the lumped elements. Thus, it is suitable for smartphone application. A prototype of the proposed antenna is manufactured and measured. The measured −6 dB impedance band‐widths in the low, mid and high bands are 340 MHz (630‐970 MHz), 1410 MHz (1510‐2920 MHz) and 1060 MHz (3160‐4220 MHz), respectively. In addition, the efficiency of the antenna is greater than 60% in most of the working frequency bands, and the antenna has good radiation performances.

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A Planar Printed Nona-Band Loop-Monopole Reconfigurable Antenna for Mobile Handsets

Cited by 43 publications

References 16 publications

A simple printed antenna with broadband property and omnidirectional radiation patterns of wire dipole

A simple printed antenna with broadband property and omnidirectional radiation patterns of wire dipole

A reconfigurable MIMO handset antenna employing liquid metal

A nona‐band narrow‐frame antenna with a defected ground structure for mobile phone applications

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