Capacitive Coupling Element Antennas for Multi-Standard Mobile Handsets

Valkonen, Risto; Kaltiokallio, Mikko; Icheln, Clemens

doi:10.1109/tap.2013.2244838

Cited by 62 publications

(41 citation statements)

References 35 publications

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“…Instead of covering all the channels simultaneously, the antenna can be tuned to a specific channel, thus relaxing the bandwidth requirements of the antenna. Approaches for antenna tuning include tunable matching components [7]- [9], switching between multiple matching circuit networks [10] or using, e.g., p-i-n diodes [11], [12] or FET switches [13] to modify the currents in the antenna. The last option is also known as aperture tuning.…”

Section: Introductionmentioning

confidence: 99%

Frequency Reconfigurable Multiband Handset Antenna Based on a Multichannel Transceiver

Hannula

Saarinen

Holopainen

et al. 2017

IEEE Trans. Antennas Propagat.

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Abstract-The upcoming standards of wireless communications result in additional and more stringent requirements for antennas in mobile phones. In this paper, we present a frequencyreconfigurable antenna that could potentially be suited for future mobile devices. Frequency reconfigurability is achieved through a cluster of mutually coupled antenna elements that are excited with frequency-dependent weights using a multichannel transceiver. We report a mobile handset antenna cluster measuring 15 x 15 x 1.6 mm 3 that covers the frequency bands of 1.7-2.7, 3.3-4.5, and 5.475-6.425 GHz with an antenna efficiency better than 90 %. The operation of the antenna cluster is experimentally verified by feeding all the antenna elements with proper weights using tailor-made power splitters that represent a multi-channel transceiver with adjustable amplitude and phase in each branch. The results obtained with the feed networks suggest the feasibility of the reconfigurability concept, and pave way for co-design of the antenna and the transceiver.

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Section: Introductionmentioning

confidence: 99%

Frequency Reconfigurable Multiband Handset Antenna Based on a Multichannel Transceiver

Hannula

Saarinen

Holopainen

et al. 2017

IEEE Trans. Antennas Propagat.

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“…Ground clearance between the middle frame and the side frame is 2.5 mm in the sides, and 10.2 or 7.8 mm in the ends. The key property of the model is the slotless metallic back cover, seen in Figure 2 The proposed antennas are of Capacitive Coupling Element (CCE) type [20,21], or slot antennas. CCEs are widely used at cellular frequencies due to their wide frequency band and robust performance.…”

Section: Design Framework and Principlesmentioning

confidence: 99%

Metal-Covered Handset With Lte Mimo, Wi-Fi Mimo, and GPS Antennas

Kurvinen¹,

Lehtovuori²,

Mai

et al. 2018

PIER C

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Abstract-Current phones include more metal than earlier, which deteriorates the performance of antennas. This paper presents the first complete antenna set designed for a modern handset with a full metal back cover. 4G, Wi-Fi, and GPS antennas are integrated into the metallic side frame of the device in a realistic model. The designed antennas are either capacitive coupling elements with reactive loads or slot antennas. Fixed matching circuits are used to improve total efficiency. The passive implementation enables the use of carrier aggregation (CA) to increase the data rates, and includes also the multipleinput multiple-output (MIMO) operation for 4G and Wi-Fi. The designed antennas cover frequency bands 704-960 MHz, 1.56-1.61 GHz, 1.71-2.69 GHz, 2.4-2.484 GHz, and 5.15-5.875 GHz, producing in measurements a good agreement with simulation results.

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“…A parasitic antenna was proposed in [8], and the antenna consisted of a feed monopole and a short stub, with a coupling aperture for matching adjustment, so the antenna achieved a wide band. Furthermore, the space left for antenna design is getting smaller and smaller, several scholars proposed using impedance matching circuit at feeding port to obtain broadband coverage [9][10][11][12]. RF switch is also used to design a reconfigurable antenna to achieve a wide band by combing several different statuses.…”

Section: Introductionmentioning

confidence: 99%

A Coupled-Fed Reconfigurable Antenna for Internal Lte Mobile Phone Applications

Zhong¹

2017

PIER Letters

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Abstract-In this paper, a multi-frequency broadband planar reconfigurable antenna is designed for smart mobile phone applications. The antenna comprises two monopole strips and a parasitic shorting strip, and generates several independent resonant modes through this kind of stub loading. The miniaturization and broadbandization of the antenna is achieved by bending the strip line and using coupling feed. In addition, loading the matching circuit at the feeding point, the bandwidth can completely cover 824-960 and 1710-2690 MHz. In order to cover a lower band LTE band 20 (800 MHz), an RF switch at shorting point is used to switch low frequency to 791 MHz. So the proposed antenna can work at GSM850, 900; DCS1800; PCS1900; WCDMA bands 1, 2, 4, 5, 8; TD-SCDMA bands A, F; CDMA BC0, BC1 and LTE bands 1,3,5,7,8, 20, 38, 39, 40, 41. Also, the total size of the antenna is 15 mm × 30 mm × 0.8 mm, which is very suitable for 4G slim smart mobile phone applications.

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Capacitive Coupling Element Antennas for Multi-Standard Mobile Handsets

Cited by 62 publications

References 35 publications

Frequency Reconfigurable Multiband Handset Antenna Based on a Multichannel Transceiver

Frequency Reconfigurable Multiband Handset Antenna Based on a Multichannel Transceiver

Metal-Covered Handset With Lte Mimo, Wi-Fi Mimo, and GPS Antennas

A Coupled-Fed Reconfigurable Antenna for Internal Lte Mobile Phone Applications

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