Polarization-Diversity Cross-Shaped PatchAntenna for Satellite-DMB Systems

ETRI Journal

关键词: reconfigurable antenna;    polarization diversity;    patch antenna;    DMB;    circular polarization;    Axial ratio;   

Others  :  1185970
DOI  :  10.4218/etrij.10.0109.0280

【 摘 要 】

A small reconfigurable patch antenna is proposed to achieve polarization diversity for digital multimedia broadcasting systems at 2.6 GHz. To obtain polarization diversity, a pair of on-slit PIN diodes is inserted in each diagonal of a cross-shaped patch. Thus, four PIN-diodes on these slits are utilized to change the connection of the slits and thus achieve polarization. Bias circuits for the diodes are allocated in the cutting corner of the cross-shaped patch to minimize the antenna size. The antenna produces left-hand circular polarization, right-hand circular polarization, or linear polarization, depending on the PIN-diode status. Analysis of circular polarization operation is explicated. Measurements show a gain of about 1.5 dB, a cross polarization of about -20 dB, and an axial ratio of about 2.5 dB.

   

【 参考文献 】

• [1]F. Yang and Y. Rahmat-Samii, "A Reconfigurable Patch Antenna Using Switchable Slots for Circular Polarization Diversity," IEEE Microw. Wireless Comp. Lett., vol. 12, no. 3, Mar. 2002, pp. 96-98.
• [2]Y.J. Sung, T.U. Jang, and Y.S. Kim, "A Reconfigurable Microstrip Antenna for Switchable Polarization," IEEE Microw. Wireless Comp. Lett., vol. 14, no. 11, Nov. 2004, pp. 534-536.
• [3]S.T. Fang, "A Novel Polarization Diversity Antenna for WLAN Applications," Proc. IEEE Antennas Propag. Soc. Int. Symp., vol. 1, July 2000, pp. 282-285.
• [4]M. Boti, L. Dussopt, and J.M. Laheurte, "Circularly Polarised Antenna with Switchable Polarisation Sense," IEE Electron. Lett., vol. 36, no. 18, Aug. 2000, pp. 1518-1519.
• [5]T.U, Jang, Y.J. Sung, and Y.S. Kim, "Square Patch Antenna with Switchable Polarization Using Spur-Line and PIN Diode," J. Korea Electromagnetic Engineering Soc., vol. 15, no. 12, Dec. 2004, pp. 1178-1183.
• [6]B.Y. Kim et al., "A Novel Single-Feed Circular Microstrip Antenna with Reconfigurable Polarization Capability," IEEE Trans. Antennas Propag., vol. 56, no. 3, Mar. 2008, pp. 630-638.
• [7]D. Schaubert et al., "Microstrip Antennas with Frequency Agility and Polarization Diversity," IEEE Trans. Antennas Propag., vol. 29, no. 1, Jan. 1981, pp. 118-123.
• [8]K.H. Chung et al., "Reconfigurable Microstrip-Patch Antenna with Frequency and Polarization-Diversities Functions," Microw. Opt. Technol. Lett., vol. 47, no. 6, Dec. 2005, pp. 605-607.
• [9]K.H. Chung et al., "Reconfigurable Microstrip Patch Antenna with Switchable Polarization," ETRI J., vol. 28, no. 3, June 2006, pp. 379-382.
• [10]R. Garg et al., Microstrip Antenna Design Handbook, Boston, Norwood, MA: Artech House, 2001.