Quad-Band Internal Mobile Phone Antenna

Tzortzakakis, M.; Langley, Richard

doi:10.1109/tap.2007.898577

Cited by 66 publications

(36 citation statements)

References 15 publications

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“…For internal wireless wide area network (WWAN) antennas applied in the clamshell mobile phone, where there are two (upper and main) ground planes, different from that of the bartype mobile phones, the antenna performances usually suffer large effects from the presence of the upper ground plane and its different orientations to the main ground plane for the open state (talk condition) and closed state (idle condition) [1][2][3][4][5][6][7][8][9][10][11]. This upper ground plane effect is usually significant for the antenna's lower band at about 900 MHz.…”

Section: Introductionmentioning

confidence: 99%

Internal wireless wide area network clamshell mobile phone antenna with reduced ground plane effects

2010

Micro & Optical Tech Letters

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In addition, parametric studies were performed to quantify the effects of height h between the radiation patch and the ground plate of the antenna on S 11 . From Figure 6, it can be seen that the whole resonant frequency decreases with the increase of h, which owing to the increased equivalent electric length of the antenna.The radiation pattern of the fabricated antenna was measured at 2.45, 5.2, and 5.75 GHz, which are shown in Figures 7-9, respectively. It can be seen that the radiation patterns at the three resonant frequencies showed omni-directional patterns in the x-y plane. At 5.75 GHz, the radiation pattern in the x-z plane was not exactly omni-directional; this is due to the effect of the ground plane. The peak gains of the antenna were 1.6 dBi at 2.45 GHz, 2.3 dBi at 5.2 GHz, and 4.4 dBi at 5.75 GHz. CONCLUSIONSA compact tri-band PIFA for WLAN and WiMAX applications has been proposed and the effects of dimensions have been studied. By using the F-T-shaped slots in the radiation patch and intro-ducing trapezoidal feeding plate, the three resonant modes are generated. The size of the fabricated radiation patch and ground plane are 25 Â 11 Â 8 mm 3 and 26 Â 40 mm 2 ; this is much smaller than a conventional inverted-F antenna. Because of its nearly omni-directional radiation pattern, the antenna has wide and potential applications for wireless communication applications.

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Section: Introductionmentioning

confidence: 99%

Internal wireless wide area network clamshell mobile phone antenna with reduced ground plane effects

2010

Micro & Optical Tech Letters

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“…The measured VSWR is less than 2.0 from 440 MHz to 680 MHz, corresponding to a wide bandwidth of 43%. Nevertheless, the specification of bandwidth of VSWR of less than 2.5 was specified by the sponsor of this work; this is acceptable in some applications, just like those presented in [29][30][31][32][33][34][35][36][37][38][39][40][41][42][43], where the VSWR was specified in the range of 2.5 to 6.0. Figure 6 also indicates some difference between the simulated and measured results.…”

Section: Test Results Of a Prototypementioning

confidence: 99%

A Novel Low-Profile Wideband Uhf Antenna

Chen

Jiang²,

Chen³

et al. 2011

PIER

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Abstract-In this paper, an ultra high frequency (UHF) low-profile antenna is proposed; it is based on the discone antenna but with addition of a back cavity, a short-circuiting structure and a two-plate top structure in order to achieve both low-profile and wideband. It is simulated and prototyped. The test results show that the antenna has an omni-directional radiation pattern in the horizontal plane, is of low-profile, has a height of less than 0.1λ max , and is wideband with an impedance bandwidth of 65% from 430 MHz to 845 MHz for VSWR < 2.5 and an impedance bandwidth of 43% from 440 MHz to 680 MHz for VSWR < 2.0. The proposed antenna can be easily flushmounted on a planar surface and therefore has great potential for uses on aircrafts and high-speed trains due to its conformal capability.

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“…The main purpose of the radiation patterns is to demonstrate that the antenna actually radiates over a wide frequency band. It can be seen that the radiation patterns in X-Z plane are nearly omni-directional even at higher frequencies, and also the cross-polarization level is low for the fourth frequencies [13][14][15]. Figure 10 shows the measured maximum gain of the proposed antenna for the WiMAX, WLAN, downlink of X-band satellite communication, and ITU frequencies.…”

Section: Antenna Radiation Characteristicsmentioning

confidence: 99%

Quad-Band Planar Inverted-F Antenna (Pifa) for Wireless Communication Systems

Ojaroudi¹,

Ojaroudi²,

Ghadimi³

2014

PIER Letters

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Abstract-In this paper, a compact quad-band planar inverted-F antenna (PIFA) for wireless communication systems is presented. The proposed PIFA consists of a radiating patch with a hookshaped slot and a modified ground plane with pair of square-ring and rotated I-shaped slots. The antenna is fabricated on an FR4 substrate with dielectric constant of 4.4. By cutting a hook-shaped slit at radiating patch, good dual-band property can be achieved which covers 3.5 GHz worldwide interoperability for microwave access (WiMAX) and 5.2 GHz wireless local area network (WLAN) frequencies. In addition, by using a modified ground plane with a rotated I-shaped an the pair of square-ring slot, additional resonances at the higher frequencies are generated which suitable for 7.25-7.75 GHz downlink of X-band satellite communication systems and 8.02-8.4 GHz international telecommunication union (ITU) applications. Good return loss, antenna gain and radiation pattern characteristics are obtained in the frequency band of interest. The proposed antenna has a small dimension of 24 × 3 × 1.6 mm 3 .

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Quad-Band Internal Mobile Phone Antenna

Cited by 66 publications

References 15 publications

Internal wireless wide area network clamshell mobile phone antenna with reduced ground plane effects

Internal wireless wide area network clamshell mobile phone antenna with reduced ground plane effects

A Novel Low-Profile Wideband Uhf Antenna

Quad-Band Planar Inverted-F Antenna (Pifa) for Wireless Communication Systems

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