Small‐size reconfigurable antenna for WWAN/LTE/GNSS smartphone applications

Xu, Yuan; Liang, Yan-Wu; Zhou, Hao-Miao

doi:10.1049/iet-map.2015.0722

Cited by 21 publications

(11 citation statements)

References 18 publications

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“…By considering all the frequency bands covered by the predefined limit for mobile terminal antennas (|S 11 | -6 dB) [44,45,46,47], the experimental frequency response results demonstrate that antenna exhibits a minimum bandwidth of 380 MHz at its lower band and can operate across the GSM, UMTS, LTE, 5G, WLAN, WiMAX, ISM, and C-band satellite communication bands.…”

Section: Antenna Return Lossmentioning

confidence: 99%

A novel quadband ultra miniaturized planar antenna with metallic vias and defected ground structure for portable devices

Mpele¹,

Mbango²,

Konditi³

et al. 2021

Heliyon

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A novel heart-shaped monopole antenna used in wireless portable communication devices is proposed and discussed in this paper. The antenna has a radiant patch surface area of 28.504 mm 2 , the physical size of 15 Â 12.5 Â 1 mm 3 , and electrical dimensions of 0.095λ 0 Â 0.079λ 0 Â 0.006λ 0 , where λ 0 denotes the wavelength of the free space at 1.89 GHz. Its prototype is printed on FR4 HTG-175, having a permittivity of 4.2 and a loss tangent of 0.019 at 1 GHz. The partial ground plane and two metallic vias connecting two open-ended branches of the slitted radiating patch to a parasitic conductor element results in about 98% miniaturization of the active patch area, as compared to the conventional antenna. The proposed antenna exhibits nearly an omnidirectional pattern in the elevation plane with a maximum radiation efficiency of 82.78% at 3.99 GHz, while a peak gain of 4.7 dBi is obtained at 6.5 GHz. The measured-6 dB impedance bandwidths demonstrate that the proposed quadband antenna operates in all the frequency bands of mobile telecommunication standards (2G/3G/4G/5G) and other applications, including WLAN, WiMAX, ISM, meteorological services, IEEE 802.11y, and C-band satellite communications. This antenna is easy to manufacture and can be used in most portable devices as a compact internal antenna. After simulating the modeled antenna using HFSS, a prototype was experimentally tested, and the measured results were compared with the data obtained by simulation. The parameters analyzed are return loss, bandwidth, and gain on all frequency bands. The fabricated prototype guarantees a minimum-10 dB bandwidth of 110 MHz and a maximum return loss of-12.2 dB, despite its low radiation efficiency of 21.43 % in the lower band dedicated to GSM applications. Furthermore, the proposed antenna operates as a narrowband and wideband.

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Section: Antenna Return Lossmentioning

confidence: 99%

A novel quadband ultra miniaturized planar antenna with metallic vias and defected ground structure for portable devices

Mpele¹,

Mbango²,

Konditi³

et al. 2021

Heliyon

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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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“…The proposed structure operates in three modes and can cover the GSM850 (824–894 MHz), GSM900 (880–960 MHz), GLONASS1616 (1610–1626.5 MHz), DCS1800 (1710–1880 MHz), PCS1900 (1850–1990 MHz), UMTS2100 (1920–2170 MHz), LTE2300 (2300–2400 MHz), WLAN (2400–2480 MHz), and LTE2500 (2500–2690 MHz) bands. To compare our proposed antenna with antennas reported in refs , which were published in recent years, the operating bands and the sizes of the antennas are summarized in Table . It shows that the proposed antenna covers more frequency bands and has a compact size.…”

Section: Introductionmentioning

confidence: 99%

“…Although 3-D antennas can be further compressed to be 2-D structures by coupled-feed techniques, 5,6 they still occupy a very large clearance zone. To reduce the size of the antennas and still ensure they can cover a wide operating band, the frequency-reconfigurable technology based on different tuning methods is studied, 7,[9][10][11][12][13][14][15] which has been validated to be one of the most effective ways in minimizing antenna designs. Instead of adding the extra structures, the antennas mainly control the electrical length of the current path by independently adjusting the states of the switches located in the radiating elements in real time.…”

Section: Introductionmentioning

confidence: 99%

“…Various switching technologies such as radiofrequency micro-electro-mechanical systems (RF-MEMS) switches, 7 variable capacitance switches, 7,8 varactor diodes, 9,10 and PIN diodes [11][12][13][14][15] are used to design the frequency-reconfigurable antennas. Among them, the PIN diodes are particularly well suited for integration in current portable electronic devices owing to its simple design, small size, and economic cost.…”

Section: Introductionmentioning

confidence: 99%

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A frequency reconfigurable antenna for multiband mobile handset applications

Zhang

Tian

Zhan

et al. 2017

Int J RF Microw Comput Aided Eng

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A frequency‐reconfigurable antenna is presented for multiband (GSM850/900/GLONASS1616/DCS1800/PCS 1900/UMTS/LTE2300/2500/WLAN) mobile handset applications. It mainly consists of radiating elements with two PIN diodes. By switching the ON/OFF states of the PIN diodes, the proposed structure can operate in three states: OFF–ON, ON–OFF, and ON–ON. When PIN diodes are in the OFF–ON states, the proposed antenna can cover the GSM850/900, PCS1900, and UMTS2100 bands by operating in Invented‐F antenna (IFA) mode. When PIN diodes are in the ON–OFF states, the antenna can cover the LTE2300/2500 and WLAN2400 bands in monopole mode. Moreover, when PIN diodes are switched to the ON–ON states, the designed antenna works in loop mode and its resonant frequencies include the GLONASS1616, DCS1800/1900, and LTE2500 bands. With the reconfigurable technique, the proposed antenna achieves a compact size of 15 × 28.5 mm2 with high efficiency from 34% to 84.86% in the total frequency range.

show abstract

Small‐size reconfigurable antenna for WWAN/LTE/GNSS smartphone applications

Cited by 21 publications

References 18 publications

A novel quadband ultra miniaturized planar antenna with metallic vias and defected ground structure for portable devices

A novel quadband ultra miniaturized planar antenna with metallic vias and defected ground structure for portable devices

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

A frequency reconfigurable antenna for multiband mobile handset applications

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