A Frequency Tuning Method for a Planar Inverted-F Antenna

Komulainen, M.; Berg, Markus; Jantunen, Heli; Salonen, E.; Free, C.E.

doi:10.1109/tap.2008.919200

Cited by 52 publications

(20 citation statements)

References 23 publications

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“…Therefore all the structural parameters can be fixed as shown in the equations (2-2) to (2)(3)(4)(5) It should be noted that the equations only for reference and should be optimized by simulation and modified during the test.…”

Section: Theoretic Analysismentioning

confidence: 99%

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A Wideband Monopole with Parasitic Elements Design

Zhou

2010

2010 International Symposium on Intelligence Information Processing and Trusted Computing

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The novel wideband antenna presented in this paper is the monopole with parasitic elements to achieve the wideband frequencies by arranging the elements of strategy. There are wider bandwidth range between 60MHz and 210MHz for the impedance below -10dB for the test and horizontally direction of this kind of antenna, which agrees with the simulation results. The antenna structure is simple and easy to get the wider application in the mobile and radio in the vehicles.

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Section: Theoretic Analysismentioning

confidence: 99%

“…Recently, conventional ultra wide band antennas for communication system [1][2][3][4] such as log periodic antenna, helix antenna in equiangular, and their transformations etc. have been successfully designed.…”

Section: Introductionmentioning

confidence: 99%

A Wideband Monopole with Parasitic Elements Design

Zhou

2010

2010 International Symposium on Intelligence Information Processing and Trusted Computing

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“…Much energy is consumed and shorter battery life hinders use of the devices [10][11][12][13][14]. The mentioned effect in phones cannot be fully compensated with current techniques [15,16]. One technique for detecting user-antenna proximity is a capacitive proximity sensor; the method for evaluating the proximity effect is introduced in [17,18].…”

Section: Introductionmentioning

confidence: 99%

Measurement Method for Sensitivity Analysis of Proximity Sensor and Sensor Antenna Integration in a Handheld Device

Myllymäki¹,

Huttunen²,

Jantunen³

et al. 2011

PIER C

Self Cite

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Abstract-A method for measuring the sensitivity of a capacitive proximity sensor and an application using the sensor as a proximity detector in mobile phone antennas is presented. 2D sensor data plots were physically more exact for tuning sensor placement. 3D sensor data plots were suitable for sensor intensity comparison, highlighting sensor differences in multiple sensor applications and effects in sensor's output due to shadowing mechanical objects. The antenna proximity sensor was measured and optimised with sensitivity measurements. In a PIFA application the antenna load could be detected from both sides and from above the antenna on a scale of 4.03 · 10 −14 F to 4.33 · 10 −14 F. The cases present all possible positions of holding a phone used in either the "calling" or "browsing" mode. The method and the application emphasise the physical sensitivity and electrical fields of the sensor. The characteristics can be further improved by using other sensor types, sensor data fusion and advanced imitation of multisensory spatial interaction by humans and animals.

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“…One compensation technique involves an antenna mismatch sensor and impedance tuning of the antenna matching circuit in the desired frequency bands [7]. Several applications for tuning resonance frequencies have been introduced [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Capacitive Recognition of the User`s Hand Grip Position in Mobile Handsets

Myllymäki¹,

Huttunen²,

Palukuru³

et al. 2010

PIER B

Self Cite

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Abstract-A capacitive method for measuring hand grip position on a mobile phone equipped with a dual-band planar inverted-F antenna (PIFA) and a monopole antenna was studied using different electrode arrangements. A capacitive sensor with a dual-electrode configuration and an antenna-integrated capacitive sensor for hand grip recognition were developed. The sensitivities of the sensors were measured along the front, side and back of the phone. The dual-electrode sensor configuration exhibited its best sensitivity of 29 fF at the bottom end of the phone. The PIFA antenna-integrated sensor proved to have sensitivity of 420 fF and the monopole antenna-integrated sensor had sensitivity of 115 fF, making them both reasonable solutions for hand grip sensors in mobile applications.

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A Frequency Tuning Method for a Planar Inverted-F Antenna

Cited by 52 publications

References 23 publications

A Wideband Monopole with Parasitic Elements Design

A Wideband Monopole with Parasitic Elements Design

Measurement Method for Sensitivity Analysis of Proximity Sensor and Sensor Antenna Integration in a Handheld Device

Capacitive Recognition of the User`s Hand Grip Position in Mobile Handsets

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