Mobile phone performance improvements using an adaptively controlled antenna tuner

Jongh, M. A. de; Bezooijen, A. van; Boyle, K. R.; Bakker, T.

doi:10.1109/mwsym.2011.5972667

Cited by 12 publications

(3 citation statements)

References 3 publications

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“…Some previous studies have aimed to mitigate these effects through parametric optimization [2], ground plane current reduction [3], and adaptive matching [4]. However, there is no method to design antennas in the presence of lossy dielectrics that shows where, and how, to place antenna feeding elements to obtain low correlation and high efficiencies.…”

Section: Design Of Mimo Terminal Antennas With User Proximity Using Cmentioning

confidence: 99%

Design of MIMO terminal antennas with user proximity using characteristic modes

Miers

Lau

2017

2017 11th European Conference on Antennas and Propagation (EUCAP)

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Abstract-Although the classical Theory of CharacteristicModes allows an arbitrary structure to be analyzed prior to the implementation of physical feeds, structures containing dielectrics have so far received very little attention. Recently, a mesh perturbation method is proposed to remove internal resonances from the characteristic mode (CM) solution for lossy dielectrics obtained using the computationally efficient surface integral equation. Herein this method was applied to extract the CMs of a lossy structure consisting of a terminal chassis held in a user hand. These modes were then individually analyzed and a subset was chosen to design a MIMO antenna with not only very low correlation, but also low hand-induced losses.

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Section: Design Of Mimo Terminal Antennas With User Proximity Using Cmentioning

confidence: 99%

Design of MIMO terminal antennas with user proximity using characteristic modes

Miers

Lau

2017

2017 11th European Conference on Antennas and Propagation (EUCAP)

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“…To counteract this mismatch, one solution is to insert a tuner between the antenna and the front end module [7][8][9][10]. This one aims at continuously compensating the antenna impedance variation in order to ensure that the front end module always works with an optimal input impedance close to 50 Ohms.…”

Section: Introductionmentioning

confidence: 99%

30 dBm P<inf>1db</inf> and 4 dB insertion losses optimized 4G antenna tuner fully integrated in a 130 nm CMOS SOI technology

Sonnerat

Pilard

Gianesello

et al. 2013

2013 IEEE 13th Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems

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In order to counteract the antenna impedance mismatch due to its interaction with the environment, one solution is to add an antenna tuner between the front-end module and the antenna. In this paper, we present the large signal measurement of a 4G integrated antenna tuner, previously presented in [1]. The tuner has been realized in STMicroelectronics 130 nm CMOS SOI technology and operates between 2500 MHz and 2690 MHz. We also propose some improvement to reduce the design parasitics, illustrated by the small signal performances of the optimized circuit.Index Terms -Embedded antenna tuner, 4G-LTE applications, CMOS SOI technology, small signal measurement, large signal measurement

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“…Nowadays, MEMS technology can be found in many applications such as micromirrors and microlens [123], high-quality tunable Radio Frequency (RF) filters [124,125], tunable antennas for mobile devices [126][127][128], RF switches and steerable antennas for radar and aerospace communications [129][130][131], medical applications like microfluidic cytometer (to measure various parameters of cells) [132], microneedles for drug delivery [133] or specific DNA sequences detection [134,135], automotive industry applications like airbags detonation, antilock braking system among others [136,137], and thermo-electric generators used for energy harvesting [138][139][140]. Traditionally, MEMS were fabricated on silicon substrates using integrated circuit batch-processing technologies such as surface and bulk silicon micromachining, lithography, etc., due to silicon availability and well-known material properties [144].…”

Section: Introductionmentioning

confidence: 99%

Study, Modelling and Implementation of the Level Set Method Used in Micromachining Processes

Álvaro¹

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"Sí com lo taur se'n va fuyt pel desert quantés sobrat per son semblant qui·l força, ne torna may fins ha cobrada força per destruir aquell qui l'ha desert: tot enaxí·m cové lunyar de vós, car vostre gest mon esforç ha confús: no tornaré fins del tot haja fus la gran pahor qui·m toll ser delitós." Ausiàs March, 1397 - †1459 Per a Marc AgradecimientosSin duda, todo el trabajo que hay detrás de esta tesis ha sido posible gracias a la colaboración y dedicación de muchos. Todos ellos merecen ser agradecidos por haber contribuido a su manera en la culminación de este trabajo.Agradecer sinceramente a mis directores y tutores, Ximo Cerdà y Ricardo Colom, por permitir formarme como investigador y ofrecerme sus consejos. Ellos me han tratado con respeto y nunca han puesto freno a mis ambiciones, más bien las han engrandecido. Gracias por guiar toda esta aventura.Una mención muy especial se merecen MiguelÁngel Gosálvez y Néstor Ferrando. Les tengo que agradecer la gran suerte que he tenido de poder colaborar con dos eminencias como ellos. Sus grandes conocimientos han permitido obtener los mejores resultados de este trabajo, además de haber sido una experiencia gratificante. Gracias por su constante apoyo y su ayuda infinita.Asimismo, dar las gracias también a Vicente Herrero, Jose María Monzó, Ana Ros y Ramón J. Aliaga. Ellos dieron vida a un ambiente de trabajo idóneo, aportándome mucho más que ayuda y conocimientos. Del mismo modoÁngel Tébar, Rafael Gadea y Jorge Daniel siempre han estado dispuestos a ayudar en todo cuanto han podido.Mi estancia en el instituto Fraunhofer de Erlangen me ha permitido acelerar mi formación y vivir unas experiencias de lo más satisfactorias. Todo ello ha sido gracias a la magnífica gente con la que he tenido el placer de colaborar y convivir. Gracias a Eberhard Bär y a toda la incontable gente del Fraunhofer IISB.Un mérito especial se merecen mi familia y mis amigos por aguantarme todo este tiempo sin perder la paciencia conmigo ni en los peores momentos. Es de un valor incalculable tener tantos hombros en los que poder dejarte caer para coger las fuerzas suficientes para seguir. Gracias Isidor y Lourdes, gracias Ferran y Andreu, y gracias Vicente, Enric y David.iii No podía faltar mi particular aimia, Nuria.Ella se merece un eterno agradecimiento por haber tenido que vivir todo esto conmigo. Compañera de todas y cada una de las experiencias, buenas y malas, de esta larga aventura. Animándome en todo momento, siempre ayudándome con un altruismo deslumbrante y enseñándome una inmensidad de conocimientos. Ella, ha sido y es, mi llir entre cards.Una vez más, muchísimas gracias a todos. iv SummaryThe main topic of the present thesis is the improvement of fabrication processes simulation by means of the Level Set (LS) method. The LS is a mathematical approach used for evolving fronts according to a motion defined by certain laws. The main advantage of this method is that the front is embedded inside a higher dimensional function such that updating this function instead of directly the front it...

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Mobile phone performance improvements using an adaptively controlled antenna tuner

Cited by 12 publications

References 3 publications

Design of MIMO terminal antennas with user proximity using characteristic modes

Design of MIMO terminal antennas with user proximity using characteristic modes

30 dBm P<inf>1db</inf> and 4 dB insertion losses optimized 4G antenna tuner fully integrated in a 130 nm CMOS SOI technology

Study, Modelling and Implementation of the Level Set Method Used in Micromachining Processes

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