Novel Architecture for LTE World-Phones

Barrio, Samantha Caporal Del; Tatomirescu, Alexandru; Pedersen, Gert Frølund; Morris, Arthur S.

doi:10.1109/lawp.2014.2301014

Cited by 24 publications

(4 citation statements)

References 16 publications

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“…In addition, a number of frequency reconfigurable handset antennas have been proposed, e.g., in [5,[7][8][9][10]. Based on the authors' knowledge, there are only a few previous papers with measurement results dealing with a frequency reconfigurable handset antenna having MIMO performance [5,10].…”

Section: Introductionmentioning

confidence: 99%

Multiband Frequency Reconfigurable 4g Handset Antenna With Mimo Capability

Ilvonen¹,

Valkonen²,

Holopainen³

et al. 2014

PIER

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Abstract-A novel frequency reconfigurable 4G Multiple-Input Multiple-Output (MIMO) handset antenna is presented and verified with experimental results. Frequency tuning is used to minimize the antenna volume and to compensate for the losses related to user-originated impedance detuning. Both antenna elements are independently frequency reconfigurable and can cover most of the LTE-A bands. The study compares the losses of CMOS-and MEMS-based digitally tunable capacitors (DTC). In addition, two prototypes with total antenna volumes of 1170 and 3900 mm 3 have been studied. The results show that the larger antenna structure operates with an efficiency better than 49% across the frequencies of 698-960 MHz and better than 56% across the frequencies of 1430-2690 MHz, when a MEMS-based DTC is used. In addition, a new method is introduced to estimate the suitability of the antenna geometry for frequency tunable antennas.

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Section: Introductionmentioning

confidence: 99%

Multiband Frequency Reconfigurable 4g Handset Antenna With Mimo Capability

Ilvonen¹,

Valkonen²,

Holopainen³

et al. 2014

PIER

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“…Sánchez‐Pérez et al propose a UHF band reconfigurable impedance tuning network, which can be used to improve reception on DVB‐H terminals . The tunable matching network approach is also employed in to provide a comprehensive LTE band coverage on phones.…”

Section: Introductionmentioning

confidence: 99%

Frequency reconfigurable antenna for VHF/UHF digital TV reception on portable devices using switching matching networks

Liao

Chou

Chen

et al. 2017

Micro & Optical Tech Letters

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“…Frequency reconfigurability can be achieved with the integration of switches, variable capacitors, phase shifters or tunable substrates in the antenna structure. Most commonly, FRAs use PIN diodes [3, 4], varactor diodes [5, 6], micro‐electro‐mechanical systems (MEMS) switches [7, 8] or MEMS tunable capacitors [9–11]. As detailed in [12], switched capacitors – for example, field effect transistors – lead to an intrinsically low breakdown voltage and power handling, thus limiting its application for 4G handsets [13].…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, limiting the antenna instantaneous BW to channel BWs implies having a novel architecture that supports separate antennas for transmitting (Tx) and receiving (Rx) signals, that is, the number of antennas must be doubled. Such an architecture was first conceptualised in [15] and investigated in [9, 10, 16, 17] according to the patent [18]. The major strength of such architecture is to avoid the use of duplex filters, hence avoiding component duplication, which will reduce space, cost and battery consumption.…”

Section: Introductionmentioning

confidence: 99%

Thermal loss becomes an issue for narrow‐band tunable antennas in fourth generation handsets

Barrio

Morris²,

Pedersen

2015

IET Microwaves, Antennas & Propagation

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Antenna tuning is a very promising technique to cope with the expansion of the mobile communication frequency spectrum. Tunable antennas can address a wide range of operating frequencies, while being highly integrated. In particular, high-Q antennas (also named narrow-band antennas) are very compact, thus are good candidates to be embedded on 4G handsets. This paper focuses on high-Q tunable antennas and contributes with a characterization of their loss mechanism, which is a major parameter in link-budget calculations. The paper shows through an example, that the tuner loss is not sufficient to explain the total loss of tunable antennas. It is found that, thermal loss -due to the metal conductivity of the antenna itself -plays a major role in the loss mechanism of narrow-band tunable antennas. The investigated high-Q PIFA designs exhibit a significant thermal loss; at 1400 MHz nearly 2 dB are lost solely due to the copper conductivity. Thermal loss poses a limitation to achievable performance of tunable antennas and to antenna miniaturization.

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Novel Architecture for LTE World-Phones

Cited by 24 publications

References 16 publications

Multiband Frequency Reconfigurable 4g Handset Antenna With Mimo Capability

Multiband Frequency Reconfigurable 4g Handset Antenna With Mimo Capability

Frequency reconfigurable antenna for VHF/UHF digital TV reception on portable devices using switching matching networks

Thermal loss becomes an issue for narrow‐band tunable antennas in fourth generation handsets

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