Fuzzy Controlled Wind Generation System

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This chapter focuses on the design of dual band antenna intended for existing wireless services including LTE, GPS, GSM, PCS, DCS, GPS, UMTS, WLAN and WiMAX bands. The present techniques available in the open literature include the modification of the main radiator via bending, folding, meandering and wrapping. Each approach offers different advantages, depending on the required application. The introduction of a ground slot in a finite antenna ground plane can be further extended to include reconfigurable features. Thus, such antennas that are compact and have multiband capability can be promising candidates for many wireless applications. Now in this slotted multi band planar system is proposed to intend on working on for frequency bands such as IN GPS, WLAN (over two frequency band spectrum), and WiMAX.


??????????????????????? Antennas that are used before are capable of working in the particular frequency applications. Where quarter wavelength radiators used are subjected to miniaturization which affects to form limited bandwidth and low radiation efficiency.

DRAW BACKS:????????????

Less reception of due to high return loss due to single patch antenna are used for each individual device.


??????????????????????? It is capable of working in 4 frequency bands and for 3 applications as built in by one antenna. The miniaturization is done in various stubbed arms that two E shaped stubs and a T shaped stub designed optimistically to achieve the minimal return loss over the four bands of frequency spectrum.

Such as

  • 575-1.665GHz ?????????? ????GPS
  • 4-2.545GHz IEEE 802.11b&g WLAN
  • 27-3.97GHz WiMAX
  • 17-5.93GHz IEEE 802.11a WLAN




Vector network analyser (Agilent N5242A)


  • Used in mobile equipments.
  • Used in vehicles area communications.
  • Cognitive radio applications.
  • High data applications.

Citation information: ????A Multi-band Slot Antenna for GPS/WiMAX/WLAN Systems

  1. F. Cao, S. W. Cheung, Senior Member, IEEE, and T. I. Yuk, Member, IEEE


[1] X. L. Sun, S. W. Cheung, and T. I. Yuk, ?Dual-band monopole antenna with frequency tunable feature for WiMAX applications,? IEEE Antennas Wireless Propag. Lett., vol. 12, pp.100-103, 2013.

[2] C. H. Chang and K. L. Wong, ?Printed ?/8-PIFA for penta-band WWAN operationin the mobile phone,? IEEE Trans. Antennas Propag., vol. 57,no. 5, pp. 1373 – 1381, May. 2009.

[3] Y. D. Dong, H. Toyao, and T. Itoh, ?Design and? characterization of miniaturized patch antennas loaded with complementary split-ring resonators,? IEEE Trans. Antennas Propag., vol. 60, no. 2, pp. 772-785, Feb. 2012.

[4] S. W. Su, ?High-gain dual-loop antennas for MIMO access points in the2.4/5.2/5.8 GHz bands,? IEEE Trans. Antennas Propag., vol. 58, no. 7,

  1. 2412-2419, Jul. 2010.

[5] K. L. Wong, and L. C. Lee, ?Multiband printed monopole slot antenna forWWAN operation in the laptop computer,? IEEE Trans. Antennas

Propag., vol. 57, no. 2, pp. 324-330, Feb. 2009.

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