Horizontally polarized omnidirectional printed antenna for WLAN applications

被引：128
作者：
Lin, C. -C. [1 ]
Kuo, L. -C. [1 ]
Chuang, H. -R. [1 ]
机构：
[1] Natl Cheng Kung Univ, Inst Comp & Commun Engn, Dept Elect Engn, Tainan 70101, Taiwan
来源：
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2006年 / 54卷 / 11期
关键词：
Alford loop; HFSS; horizontal polarization; laptop PC; onmidirectional; printed antenna; printed inverted-F antenna (PIFA); WLAN;
D O I：
10.1109/TAP.2006.884307
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The design simulation, fabrication, and measurement of a 2.4-GHz horizontally polarized omnidirectional planar printed antenna for WLAN applications is presented. The antenna adopts the printed Alford-loop-type structure. The three-dimensional (3-D) EM simulator HFSS is used for design simulation. The designed antenna is fabricated on an FR-4 printed-circuit-board substrate. The measured input standing-wave-ratio (SWR) is less than three from 2.40 to 2.483 GHz. As desired, the horizontal-polarization H-plane pattern is quite omnidirectional and the E-plane pattern is also very close to that of an ideal dipole antenna..,Also a comparison with the popular printed inverted-F antenna (PIFA) has been conducted, the measured H-plane pattern of the Alford-loop-structure antenna is better than that of the PIFA when the omnidirectional pattern is desired. Further more, the study of the antenna printed on a simulated PCMCIA card and that inserted inside a laptop PC are also conducted. The HFSS model of a laptop PC housing, consisting of the display, the screen, and the metallic box with the keyboard, is constructed. The effect of the. laptop PC housing with different angle between the display and keyboard on the antenna is also investigated. It is found that there is about 15 dB attenuation of the gain pattern (horizontal-polarization field) in the opposite direction of the PCMCIA slot on the laptop PC. Hence, the effect of the large ground plane of the PCMCIA card and the attenuation effect of the laptop PC housing should be taken into consideration for the antenna design for WLAN applications. For the proposed antenna, in addition to be used alone for a horizontally polarized antenna, it can be also a part of a diversity antenna.
引用
收藏
页码：3551 / 3556
页数：6
相关论文
共 12 条
  • [1] Alford A., 1940, Electr Eng, V59, P843, DOI [10.1109/EE.1940.6435249, DOI 10.1109/EE.1940.6435249]
  • [2] Dual-frequency strip-sleeve monopole for laptop computers
    Ali, M
    Okoniewski, M
    Stuchly, MA
    Stuchly, SS
    [J]. IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 1999, 47 (02) : 317 - 323
  • [3] Analysis of integrated inverted-F antennas for Bluetooth applications
    Ali, M
    Hayes, GJ
    [J]. 2000 IEEE-APS CONFERENCE ON ANTENNAS AND PROPAGATION FOR WIRELESS COMMUNICATIONS, 2000, : 21 - 24
  • [4] Bernhard JT, 1997, IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM 1997, VOLS 1-4, P2210, DOI 10.1109/APS.1997.625408
  • [5] The effect of electric field polarization on indoor propagation.
    Chizhik, D
    Ling, J
    Valenzuela, RA
    [J]. ICUPC '98 - IEEE 1998 INTERNATIONAL CONFERENCE ON UNIVERSAL PERSONAL COMMUNICATIONS, VOLS 1 AND 2, 1998, 1-2 : 459 - 462
  • [6] Chuang H. R., 1998, U.S. Patent, Patent No. [5 767 809, 5767809]
  • [7] 3-d FDTD design analysis of a 2.4-GHz polarization-diversity printed dipole antenna with integrated balun and polarization-switching circuit for WLAN and wireless communication applications
    Chuang, HR
    Kuo, LC
    [J]. IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 2003, 51 (02) : 374 - 381
  • [8] Johnson J.M., 1996, P IEEE APS INT S DIG, V1, P718
  • [9] Compact Dual-Printed Inverted-F Antenna Diversity Systems for Portable Wireless Devices
    Karaboikis, M.
    Soras, C.
    Tsachtsiris, G.
    Makios, V.
    [J]. IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, 2004, 3 : 9 - 14
  • [10] Karakoussis GP, 2003, IEEE WCNC, P88
12