Reconfigurable small antenna for mobile phone using MEMS tunable capacitor

Ramachandran, Prabhu; Annamaa, Petteri; Gaddi, R.; Tornatta, Paul; Morrell, Larry; Schepens, Cor

doi:10.1109/lapc.2013.6711919

Cited by 6 publications

(1 citation statement)

References 9 publications

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“…With this position, we are able to achieve 800 MHz of resonance frequency with C min , and 0.652 pF is used to lower the operating frequency to 770 MHz Figure 5 shows the measured gain of ACT antenna for the tuning states of DVC same as in Figure 4. The range of the measured average gain for the ACT antenna is approximately from 21.27 to 22.35 dBi, which is not only in competitive antenna gain with 260 MHz of tuning ranges as well as in size of the antenna compared with those presented in [12][13][14]. It is noted that the antenna gain is tend to be reduced as the resonance frequencies of the ACT antenna become lower especially at 700 MHz range.…”

Section: Antenna Structurementioning

confidence: 80%

A new frequency‐reconfigurable antenna using coupling patterns for mobile handsets

Lee

Cho

2015

Micro & Optical Tech Letters

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This letter focuses on the design of a new frequencyreconfigurable antenna for a mobile handset application. The proposed antenna supports the most important long-term evolution bands: band 17 (704-746 MHz), band 13 (746-787 MHz), band 5 (824-894 MHz), and band 8 (880-960 MHz). A digital variable capacitor (DVC) is used via a coupling pattern proximity to the aperture of an inverted F antenna (IFA) to which a single-pole single throw RF switch is connected to take advantages of the two different kinds of tuning elements. We show that the proposed antenna is able to have a quasicontinuous and wide range of frequency tuning capabilities over 700-960 MHz through simulations and experiments. We also show that the coupled aperture used for connection of the DVC to the aperture of IFA is helpful for reducing the ohmic losses in the DVC from the antenna efficiency degradation which is the most important figure of merit for frequency reconfigurable antennas based on the active tuning elements.

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Section: Antenna Structurementioning

confidence: 80%