Wideband monopole antenna for DTV/GSM operation in the mobile phone

Lee, Cheng‐Tse; Lin, Yuan-Chih

doi:10.1002/mop.23194

Cited by 13 publications

(10 citation statements)

References 15 publications

(14 reference statements)

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“…It is well known that the first two resonances of the linear straight strip monopole usually show a frequency ratio of about 1 to 3 [22,23]. This also applies to the shorted strip resonator in the proposed design.…”

Section: Proposed Design Of Two Antennas With Improved Isolationmentioning

confidence: 57%

Isolation improvement of 2.4/5.2/5.8 GHz WLAN internal laptop computer antennas using dual‐band strip resonator as a wavetrap

Kang

2009

Micro & Optical Tech Letters

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A high‐isolation two‐antenna structure comprising two small‐size uniplanar WLAN antennas and a dual‐band strip resonator embedded in‐between for laptop computer application is presented. The proposed design occupies a small planar size of 9 × 50 mm2 when mounted above the top edge of the large supporting metal frame of the laptop display. The two WLAN antennas are coupled‐fed printed PIFAs capable of covering 2.4/5.2/5.8 GHz band operation, each occupying a size of 9 × 13 mm2 and both facing to each other back‐to‐back with a spacing of 24 mm (that is, the total length of the proposed two‐antenna structure is 50 mm). The embedded strip resonator functions as a dual‐band wavetrap over the 2.4 and 5.2/5.8 GHz bands to trap the antenna's near‐field radiation between the two antennas, which effectively reduces the mutual coupling between the two antennas. Good measured isolation (S21 < −18 dB) over the 2.4/5.2/5.8 GHz bands is obtained, which is acceptable for practical laptop computer applications. The proposed design works for the large ground plane condition in the laptop computer, different from many of the reported two‐antenna designs working for the relatively much smaller ground plane conditions such as in the mobile phones and PC cards. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 58–64, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24831

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Section: Proposed Design Of Two Antennas With Improved Isolationmentioning

confidence: 57%

Isolation improvement of 2.4/5.2/5.8 GHz WLAN internal laptop computer antennas using dual‐band strip resonator as a wavetrap

Kang

2009

Micro & Optical Tech Letters

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“…A wide operating band of larger than 140 MHz is hence easily achieved for the PIFA to cover GSM850/900 operation. The coupling-feed design can be considered as an internal matching circuit [2][3][4][5], which requires no additional board space on the system circuit board of the mobile phone and is hence advantageous over the use of the external matching circuits [6 -9] to achieve improved impedance matching of the antenna.…”

Section: Introductionmentioning

confidence: 99%

GSM850/900/1800/1900/UMTS coupled‐fed planar λ/8‐PIFA for internal mobile phone antenna

Chang¹

2009

Micro & Optical Tech Letters

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higher harmonic suppressions with less number of periodic structures compared to the conventional DGS filter. EXPERIMENT AND RESULTSTo validate the proposed low pass filter, it was simulated and fabricated in the Taconic TLC with a relative permittivity e r ϭ 3.2 and a thickness h ϭ 0.787 mm. Figure 8(a) shows the photograph of the proposed low pass filter with compact size of 25 Ј 40 mm 2 . The measured results have shown a good agreement with the theoretical results. The experiment results demonstrate that the fabricated LPF has a 3 dB cut off frequency at 4.5 GHz and there is a shift of cutoff frequency of about 50 MHz. The insertion loss is low dB at the passband when measured and its stopband is well suppressed below 32-dB from 5.2 to 10 GHz. CONCLUSIONSIn this article, a novel compact microstrip low pass filter using elliptic DGS cells is presented. The novel H shape open stub increases the equivalent parallel capacitance to improve the outband suppression. An equivalent circuit model was given to depict the novel DGS filter. The proposed structure with main dimension parameters was analyzed as a design guide to fabricate the filter. The measurement results have shown good agreement with the theoretical results. The cutoff frequency response is sharp and insertion loss is low with stopband from 5.17 to 10 GHz, which was suppressed more than 32 dB. 2. F. Zhang and C. F. Li, Power divider with microstrip electromagnetic bandgap element for miniaturisation and harmonic rejection, Electron Lett 44 (2008), 422-424.

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“…In addition, the antenna has a simple configuration and fabricate easy. The occupied volume of the antenna is 320mm 3(20 x20xO .8mm 3 ) only, which is among the smallest in the reported internal whole DTV antennas. The antenna is especially suited for application in small-size DTV signal receptions and the handheld mobile devices.…”

Section: Resultsmentioning

confidence: 85%

“…Recently, digital video broadcasting-handheld (DVB-H) has made it possible to deliver broadcast television or other multimedia services to a mobile or handheld device [3][4][5]. The DVB-H standard is designed to operate in UHF bands of IV and V (47o-862MHz).…”

mentioning

confidence: 99%

Novel chip antenna with eight spiral monopole slot structures for DVB-H applications

Chang¹,

Lin²,

Tang³

et al. 2010

2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON)

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A printed chip type antenna using monopole spiral slot structures with system ground for digital video broadcasting-handheld (DVB-H) signal reception in the UHF band is proposed. By utilizing the eight quarter-wavelength spiral slot I a radiator in configuration. In this case, the occupied area of the monopole slot chip antenna on the system circuit board can be further reduced . Antenna has a compact size of 20x20xO.8mm 3 • It size is minimized so that it can be easily installed to mobile handset. The simulated and measured results show that the impedance bandwidth covers the DVT (470-860 MHz) band with return loss ISIlI than 5. The antenna can get omnidirectional radiation pattern in the whole frequency band. The measurement result is agree with simulation.Index Termsdigital video broadcasting-handheld (DVB-H), spiral slot, monopole slot, mobile handset, omnidirectional.

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Wideband monopole antenna for DTV/GSM operation in the mobile phone

Cited by 13 publications

References 15 publications

Isolation improvement of 2.4/5.2/5.8 GHz WLAN internal laptop computer antennas using dual‐band strip resonator as a wavetrap

Isolation improvement of 2.4/5.2/5.8 GHz WLAN internal laptop computer antennas using dual‐band strip resonator as a wavetrap

GSM850/900/1800/1900/UMTS coupled‐fed planar λ/8‐PIFA for internal mobile phone antenna

Novel chip antenna with eight spiral monopole slot structures for DVB-H applications

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