Broadband planar DTV antenna in the portable media player held by the user's hands

Li, Wei Yu; Row, Jeen‐Sheen

doi:10.1002/mop.22639

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…The digital television (DTV) reception has been very attractive for applications in recent wireless communications. Many kinds of antennas for DTV reception have been studied [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16], and delivering broadcast television signals to various terminals such as mobile phone [1], laptop computer [2,3], multi-media player [4][5][6], vehicle [7] and the reception devices [8][9][10][11][12][13][14][15][16], etc.…”

Section: Introductionmentioning

confidence: 99%

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CPW-Fed Sleeve Monopole Antenna With Complementary Sir Radiators for DTV Signal Reception and Circularly Polarized Applications

Liu¹,

Chiu²,

Yeh³

et al. 2010

PIER C

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A new circularly-polarized (CP) sleeve antenna fed by a CPW for DTV signal reception applications is presented in this paper. The CPW-fed sleeve monopole antenna consists of square loop sleeve, CPW-fed and complementary SIR radiators. The lower and upper resonance frequencies of the desired band are controlled by the complementary SIR arms, making designs of the wide-band antenna very easy. To demonstrate the idea, the proposed antenna was designed at the band with 470-863 GHz (BW = 393 MHz, 58.9%) for DTV UHF-bands. The antenna gains are varied about 2.2 to 4.0 dBi. An omnidirectional radiation property is also shown. The CP operation for the proposed design can be achieved by properly adjusting the asymmetrical radiators. The reflection coefficient, axial ratio, radiation pattern and gain of the proposed antenna were studied, and reasonable agreement between the simulated and measured results was obtained.

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Section: Introductionmentioning

confidence: 99%

“…Basically, these structures belong to the monopole [2,[4][5][6][7][11][12][13][14][15], dipole [1,3,[8][9][10], planar [17] and the loop [16]. The characteristics of these antennas include broadband, compact, omidirectional patterns and high gain.…”

Section: Introductionmentioning

confidence: 99%

CPW-Fed Sleeve Monopole Antenna With Complementary Sir Radiators for DTV Signal Reception and Circularly Polarized Applications

Liu¹,

Chiu²,

Yeh³

et al. 2010

PIER C

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Study of a uniplanar printed internal WWAN laptop computer antenna including user's hand effects

Lee

Wong

2009

Micro & Optical Tech Letters

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A uniplanar monopole antenna to be printed on a thin (0.4 mm) and small‐size FR4 substrate and capable of GSM850/900/1800/1900/UMTS penta‐band WWAN operation for thin‐profile laptop computer application is presented. The antenna is formed by a direct‐fed shorter radiating strip for upper‐band operation at about 1900 MHz and a coupled‐fed longer radiating strip which is also short‐circuited to the antenna ground for lower‐band operation at about 900 MHz. Note that the two radiating strips are fed using different excitation mechanisms. With the coupling excitation and short‐circuiting, which functions as an internal printed matching circuitry, the longer radiating strip can provide a wide dual‐resonant lower band at around 900 MHz for GSM850/900 operation. A wide upper band can also be generated at about 1900 MHz for the antenna to cover GSM1800/1900/UMTS operation. The antenna is studied in the article, and the user's hand effects on the performances of the antenna are analyzed. The obtained results are useful for the antenna employed in the laptop computer with a touch panel. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2341–2346, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24614

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Very small size printed monopole with embedded chip inductor for 2.4/5.2/5.8 GHz WLAN laptop computer antenna

Kang

2009

Micro & Optical Tech Letters

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mode conversion, because both 15 GHz and 9 GHz conditions cannot be satisfied at the same time. The final design of the mode converter is shown in Figure 2. Three dielectric rods are located at the center of the waveguide. Two of these have r ¼ 0.515 mm and the remainder have a half cross-section radius of 0.36 mm in order to decrease electromagnetic reflection. Nine dielectric rods are placed from the center of the waveguide to near the sidewall with increasing radius of the rods r and with constant a ¼ 9.54 mm. Table 1 shows the relation between the distance d and radius r. The S parameters between the input port (Port 1) and output port (Port 2) are calculated using the HFSS software by Ansoft and the results are shown as solid lines in Figures 4(a) and 4(b). The electromagnetic waves pass through as the TE 10 mode for 7-11.2 GHz and are converted to the TE 20 mode for 14.1-16.1 GHz under a condition of over 95% efficiency. However, as the TE 20 mode is not sufficiently small under À15 dB, optimization of the design is necessary for reduction of reflections. Although reflection as TE 20 is not small at high frequency, if a coaxial waveguide converter is used for the introduction of electromagnetic waves to a waveguide, odd mode may not have a strong influence on even symmetry structure. SIMPLE FABRICATION METHODFor the fabrication of a mode converter, such as, the Type A illustrated in Figure 5(a), it is necessary to locate the dielectric rods in the waveguide without a gap at top and bottom. Such a structure may be difficult to fabricate. As a solution, holes with diameter 0.2 mm larger than the rods were fabricated at the top of the waveguide and the dielectric rods were inserted [Type B, CONCLUSIONSWe have previously reported that single-mode propagation is available for a metallic waveguide with dielectric rods arrayed at the center of a waveguide using the TE 10 mode and the TE 20 mode. However, a TE 20 -like mode, which is propagated in the second band, is an odd mode, and generation is not easy. In this investigation, a mode converter is proposed, which passes through the TE 10 mode for the low frequency range and converts TE 10 to the TE 20 mode for the high frequency range by small variation in the group velocity. It was shown that the electromagnetic waves pass through as the TE 10 mode for 7-11.2 GHz and are converted to the TE 20 mode for 14.1-16.1 GHz under a condition of over 95% efficiency. ABSTRACT: A very small size planar two-strip monopole printed on a thin (0.4 mm) FR4 substrate for 2.4/5.2/5.8 GHz triple-band WLAN operation in the laptop computer is presented. With the aid of an embedded chip inductor of 5.6 nH in the longer strip of the printed monopole, a much reduced strip length for obtaining the resonant mode at about 2.4 GHz is obtained, thereby leading to a much reduced size of the antenna for the desired WLAN operation. When the antenna is mounted along the top edge of the display ground, it shows a height of 9 mm and a length of 6 mm only, which is about the smallest among the tr...

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Broadband planar DTV antenna in the portable media player held by the user's hands

Cited by 4 publications

References 7 publications

CPW-Fed Sleeve Monopole Antenna With Complementary Sir Radiators for DTV Signal Reception and Circularly Polarized Applications

CPW-Fed Sleeve Monopole Antenna With Complementary Sir Radiators for DTV Signal Reception and Circularly Polarized Applications

Study of a uniplanar printed internal WWAN laptop computer antenna including user's hand effects

Very small size printed monopole with embedded chip inductor for 2.4/5.2/5.8 GHz WLAN laptop computer antenna

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