Tuning techniques for planar inverted-F antenna

Panayi, P.K.; Al-Nuaimi, M.O.; Ivrissimtzis, L.P.

doi:10.1049/el:20010692

Cited by 44 publications

(21 citation statements)

References 6 publications

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“…Frequency tunability for handset applications has been proposed with various switching techniques such as RF switches, MEMS switches, PIN diodes and varactors [20][21][22][23][24][25][26][27][28][29][30]. In this paper, RF MEMS capacitors are used as tuning components because of their high-Q and high linearity performance.…”

Section: Introductionmentioning

confidence: 99%

Self‐matched high‐ Q reconfigurable antenna concept for mobile terminals

Bahramzy

Jagielski²,

Svendsen³

et al. 2014

IET Science, Measurement & Technology

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This study presents reconfigurable antenna design for a front end (FE) that has separate transmit (Tx) and receive (Rx) path. In such an FE, the Tx and Rx antennas can be content with covering only the transmit and receive channels in a frequency band. Therefore they can be quite narrow-band. Narrow-band antennas can exhibit high losses, because of the relative high current density per area and limited tuning/matching component Q. To address this, a self-matched antenna design is introduced, having the tunable capacitor as the only physical component. The Tx and Rx narrow-band antennas are designed to cover the frequency range 1710-2170 MHz. Metrics as for example, impedance bandwidth and efficiency are obtained both in simulations and measurements.

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Section: Introductionmentioning

confidence: 99%

Self‐matched high‐ Q reconfigurable antenna concept for mobile terminals

Bahramzy

Jagielski²,

Svendsen³

et al. 2014

IET Science, Measurement & Technology

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“…Multiband PIFA for mobile applications were proposed [17,18]. Frequency reconfiguration using diode switches [18][19][20][21][22] or MEMS switches [23][24][25] had been investigated quite extensively for several versions of free-standing PIFA. Recently, printed PIFA antennas were used extensively in potable wireless communication due to a much wider bandwidth (20∼30%) and the small size by removing the ground backing underneath the wire antenna [26].…”

Section: Introductionmentioning

confidence: 99%

Varactor Loaded Tunable Printed Pifa

Liang

Yang

2009

PIER B

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Abstract-Varactor tuned printed planar inverted-F antennas (PIFA) are investigated. The low-profile printed antennas are fabricated together with the layouts of its DC control circuits and other RF/baseband circuit footprints. A surface mounted (SMT) varactor is applied as a frequency-tuning element at the middle of the long radiating arm in PIFA. Passive lumped DC bias circuits are implemented with good isolation. Both single and dual-band varactor tuned PIFA antennas are investigated. For a single-band PIFA, prototype designs show the in-band frequency (return loss is <10 dB) is tunable from 1.6 GHz to 2.3 GHz when the bias voltage varies from 0 V to 9.5 V. Measured results show about 70∼75% efficiency and 2∼3 dB maximum gain. For a dual band PIFA with two varactor loadings, both the 800∼900 MHz and 1.7∼2.2 GHz bands are tuned individually by a varactor. By varying low-band capacitance, the operation frequency is tuned from 780 MHz to 1020 MHz, with little change on the higher frequency band. By varying high-band capacitance, the operation frequency is tuned from 1700 MHz to 2140 MHz, with little change on the lower frequency. Measurement shows antenna radiation efficiencies within operation bands are about 55% at the low band and about 45% at the high band. The proposed frequency reconfigurable antennas could be useful for personal mobile terminal applications.

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“…This has been used for single-band and dual-band antennas [10]- [13]. Other previously reported tuning methods include the use of an adjustable reactive component between a PIFA patch and a ground plane [10], [14], [15], or switched tuning stubs, which have been applied in both single-band and dual-band PIFAs [16], [17]. In these tuning methods, the tuning circuit is separated from the antenna and built either next to, or under, the antenna element.…”

Section: Introductionmentioning

confidence: 99%

A Frequency Tuning Method for a Planar Inverted-F Antenna

Komulainen

Berg

Jantunen

et al. 2008

IEEE Trans. Antennas Propagat.

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Abstract-A novel method is presented for electrically tuning the frequency of a planar inverted-F antenna (PIFA). A tuning circuit, comprising an RF switch and discrete passive components, has been completely integrated into the antenna element, which is thus free of dc wires. The proposed tuning method has been demonstrated with a dual-band PIFA capable of operating in four frequency bands. The antenna covers the GSM850, GSM900, GSM1800, PCS1900 and UMTS frequency ranges with over 40% total efficiency. The impact of the tuning circuit on the antenna's efficiency and radiation pattern have been experimentally studied through comparison with the performance of a reference antenna not incorporating the tuning circuit. The proposed frequency tuning concept can be extended to more complex PIFA structures as well as other types of antennas to give enhanced electrical performance.

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Tuning techniques for planar inverted-F antenna

Cited by 44 publications

References 6 publications

Self‐matched high‐ Q reconfigurable antenna concept for mobile terminals

Self‐matched high‐ Q reconfigurable antenna concept for mobile terminals

Varactor Loaded Tunable Printed Pifa

A Frequency Tuning Method for a Planar Inverted-F Antenna

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