A small planar inverted-F antenna with parasitic element for WLAN applications

Stoiljković, V.; Wilson, G. Lloyd

doi:10.1049/cp:19970213

Cited by 7 publications

(3 citation statements)

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“…It can be said at this point that the corners of the patch have a noticeable effect on f r and that f r does not only dependent on the distance of the short pin from the feed point. This is because of the high electric field intensity around the corners [5]. The effective bandwidth of the PIFA using this technique has been found to be as high as 502MHz (804 à 1306 MHz) and is by far wider than those associated with the whip and small helix antennas.…”

Section: Short Pin Effect On Resonance Frequencymentioning

confidence: 97%

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Tuning techniques for planar inverted-F antenna

2001

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-The rapid growth of mobile communications since the introduction of GSM has challenged the industry for designing terminals of reduced size, cost and power consumption. The efficiency and size trade-offs of the antenna on such terminals become an important issue. On the other hand, multi-band operation covering the existing GSM900/DCS1800 and the future UMTS bands is another significant subject of investigation in the mobile phone industry. In this paper, different methods for tuning the planar inverted-F antenna (PIFA) are discussed, in particular with regard to the positioning of the short pins and the introduction of tuning capacitors. A reduced size dual band fine tuned PIFA for the GSM900/DCS1800 bands is introduced and its performance demonstrated. Finally, a technique employing reversed biased varactors for electronically tuning the PIFA is presented.

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Section: Short Pin Effect On Resonance Frequencymentioning

confidence: 97%

“…The PIFA, which has been the subject of recent research [1]- [5], is an alternative solution, characterised by both higher efficiency (compared to a typical microstrip patch antenna) and lower profile (compared to wire antennas). The absolute directive gain of the PIFA can be as high as 6dBi if good matching can be achieved.…”

Section: Introductionmentioning

confidence: 99%

Tuning techniques for planar inverted-F antenna

2001

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“…Whether the antenna is used for broadcasting, WLAN, cellular telecommunications, PMR or any other application, the performance of the antenna is paramount, and the antenna resonant frequency and the antenna bandwidth are of great importance [11] [12]. The idea of using a parasitic element to increase the bandwidth of an antenna and obtain other resonant frequency well known in antenna theory [21]. In this work, to obtain multiband IFA, a parasitic element is placed beneath adjusted to the main IFA to derive more frequency bands.…”

Section: The Effects Of Parasitic Elementmentioning

confidence: 99%

Examination of Multiband IFA for UHF and SHF Channel Applications

E¹,

Amalia²,

Siradjuddin³

et al. 2018

Preprint

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The Inverted F Antenna (IFA) with the parasitic element on a finite conducting plane is proposed in the range frequency of 0.1 to 5.5 GHz and its characteristics are analyzed numerically. In this research, the parasitic element and the main IFA are investigated to obtain the resonance frequency for multiband operation purposes. The parasitic element is placed beneath adjusted to the main IFA to derive more frequency bands. The distance between the parasitic element and main horizontal element extremely affects the performance of the IFA. It is found that when the parasitic element is located closer to the conducting plane, this element is coupled by the current on the conducting plane. Consequently, the return loss bandwidth becomes narrower. Therefore, the gain of the proposed IFA becomes a bit higher. The antenna gain is about 8.21 dB at band #3 (λ1.747), 7.43 dB at band #5 (λ2.967) and 8.82 dB at band #6 (λ4.023). This occurs when the calculation condition is antenna height h1 = 23 mm, h2 = 21 mm, horizontal antenna elements L = 173.2 mm, L1 = 140.9 mm and Lp = 152 mm, shorted element Ls = 30.7 mm, the distance between parasitic element and shorted element pyl = 5 mm. While the size of conducting plane is considered pxp+pxm by pyp+pym as 57.5+57.5 mm by 200+50 mm. In the numerical analysis, the electromagnetic simulator WIPL-D based on Method of Moment is used. The results show that the proposed IFA has UHF and SHF channel receiver which are suitable for advanced wireless service (band #3), mobile phones, Bluetooth, maritime service, radiolocation service (band #5) and radars, mobile phones, commercial wireless LAN (band #6).

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Effects of finite‐sized groundplane on radiation pattern deformation, impedance bandwidth, and radiation efficiency of U‐PIFA

Salonen

2003

Micro & Optical Tech Letters

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Planar‐inverted F antennas (PIFAs) are widely used in portable devices, which are definitely size‐limited. Therefore, it is useful to study the effects of a finite‐sized ground plane on the antenna's various radiation and circuit parameters. In this paper, impedance bandwidth with criterion VSWR < 2 and radiation efficiency as a function of antenna position on a finite‐sized ground plane are studied for a dual‐band U‐shaped‐slot PIFA (U‐PIFA). Impedance bandwidth and radiation efficiency dependence along the ground plane are the main concerns. The results show that radiation efficiency and impedance bandwidth are strongly dependent on the antenna position on the groundplane. In addition, it is shown that the desired bandwidth can be controlled by proper location of the antenna. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 491–496, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10800

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A small planar inverted-F antenna with parasitic element for WLAN applications

Cited by 7 publications

References 0 publications

Tuning techniques for planar inverted-F antenna

Tuning techniques for planar inverted-F antenna

Examination of Multiband IFA for UHF and SHF Channel Applications

Effects of finite‐sized groundplane on radiation pattern deformation, impedance bandwidth, and radiation efficiency of U‐PIFA

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