Jen-Chen Lu

HTC Corporation, Hsin-chu-hsien, Taiwan, Taiwan

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Publications (5)2.46 Total impact

  • Huan-Chu Huang · Jen-Chen Lu · Powen Hsu
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    ABSTRACT: A printed Yagi-Uda antenna with a meandered driven dipole and a concave parabolic reflector is proposed for dual-band operations of L1-band Global Navigation Satellite System (GNSS) and S-band China Mobile Multimedia Broadcasting (CMMB). The antenna is designed and fabricated on a thin dielectric substrate, and measured at 1580 MHz in the low band (L1-band) and 2645 MHz in the high band (S-band), respectively, with directivities of 6.7 and 4.9 dBi, front-to-back ratios of 13.1 and 10.3 dB, cross-polarization levels of $- bm{23.8}$ and $- bm{21.9},bf{dB}$, bandwidths of 4.0% and 6.5%, and antenna efficiencies of $- bm{0.40},bf{dB}$ (91.2%) and $- bm{0.96},bf{dB}$ (80.2%), which are better than $- bm{1},bf{dBi}$ in terms of the three-dimensional (3-D) average gain. The occupied area of this dual-band antenna is the same as that of the previously proposed single-band one. With these properties, the proposed antenna is promising for combo applications of L1-band GNSS and S-band CMMB.
    IEEE Transactions on Antennas and Propagation 05/2015; 63(5):2342-2348. DOI:10.1109/TAP.2015.2406914 · 2.46 Impact Factor
  • Huan-Chu Huang · Jen-Chen Lu · Powen Hsu
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    ABSTRACT: An experiment is performed on a thin dielectric substrate for the compact printed Yagi type antenna described theoretically in [1]. This time the SMA connector at the feed is taken into design considerations. Measured results show that this implemented antenna has a high directivity of 7.3 dBi, a front-to-back ratio of 11.6 dB, a cross-polarization level of −33.5 dB, and 3-dB beamwidths of 73° and 112° in the planes of θ = 90° and ϕ= 90°, respectively. The bandwidth is 9.1%, and the antenna efficiency is 92%. The proposed antenna is suitable for the global positioning system application in the mobile devices whose volumes are usually not sufficient for embedded antennas with good axial ratio (AR) values of right hand circular polarizations and good angular coverage of preferred AR values.
  • Huan-Chu Huang · Jen-Chen Lu · Powen Hsu
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    ABSTRACT: A planar bi-directional antenna with high directivities in the broadside directions on a thin FR4 dielectric substrate based on the transformation of the Yagi-Uda design rationale is proposed. This design can provide two main beams with high directivities, better than 6.0 dBi, in two broadside directions. The bandwidth is around 5.5% and efficiency of the antenna is 89.3%, which is better than 78.5% or -1 dBi in terms of the 3D average gain.
    Antennas and Propagation Society International Symposium (APSURSI), 2010 IEEE; 08/2010
  • Huan-Chu Huang · Jen-Chen Lu · Powen Hsu
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    ABSTRACT: A simple planar Yagi-Uda antenna with a single director and a concave parabolic reflector on a thin dielectric substrate is proposed. Through the innovative design, the simple Yagi-Uda antenna can achieve the high directivity of 9.0 dBi, front-to-back ratio of 14.5 dB, cross-polarization level of-38.7 dB, bandwidth of 6.0%, and the radiation efficiency of 85.1%, i.e., better than -1 dBi in terms of the 3D average gain. This proposed antenna is especially suitable for the mobile devices with GPS functions.
  • Huan-Chu Huang · Jen-Chen Lu · Powen Hsu
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    ABSTRACT: A planar Yagi-Uda antenna with a single director, a meandered driven dipole, and a concave parabolic reflector on a thin dielectric substrate is proposed. Through this design, the high directivity of 7.3 dBi, front-to-back ratio of 14.7 dB, cross-polarization level of -39.1 dB, bandwidth of 5.8%, and the radiation efficiency of 87.5%, which is better than -1 dBi in terms of the 3D average gain, can be achieved. Besides, the area of this antenna is much smaller than that of the previously proposed one by about 78%. Therefore, the proposed antenna is suitable for the GPS (Global Positioning System) application in mobile devices whose volumes are usually not sufficient for embedded antennas with a good RHCP (right hand circular polarization) AR (axial ratio) values and not enough angular coverage of the designed AR values.