Design and Optimization of Reconfigurable Inset-Fed Microstrip Patch Antennas with High Gain for Wireless Sensor Networks

In this paper, a tunable microstrip patch antenna designed using RF MEMS switches is reported. The design and simulation antenna were performed using high frequency structure simulator (HFSS). The antenna was designed in ISM band and operates simultaneously at 2.4 Ghz and 5.7 Ghz with a -10 dB return-loss bandwidth of 20 Mhz and 180 Mhz, respect- tively. To obtain high efficiency and improve integrated ability, the high resistivity silicon (HRS) wafer was used for the antenna. The antenna achieved high gain with 8 dB at 5.7 Ghz and 1.5 dB at 2.4 Ghz. The RF MEMS DC contact switches was simulated and analysis by ANSYS software.

[1]  S.K. Koul,et al.  Micromachined inset-fed patch antenna at Ka-band , 2006, 2006 Asia-Pacific Microwave Conference.

[2]  M. Ramesh,et al.  Design inset-fed: Microstrip patch antennas , 2003 .

[3]  P.M. Mendes,et al.  Integrated 5.7 GH size antenna for wireless sensor networks , 2003, TRANSDUCERS '03. 12th International Conference on Solid-State Sensors, Actuators and Microsystems. Digest of Technical Papers (Cat. No.03TH8664).

[4]  L.P.B. Katehi,et al.  Microelectromechanical systems (MEMS) actuators for antenna reconfigurability , 2001, 2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157).

[5]  Wu Jing,et al.  Millimeter-wave design of aperture-coupled micromachined patch antennas , 2008, 2008 International Conference on Microwave and Millimeter Wave Technology.

[6]  P. M. Mendes,et al.  INTEGRATED 5.7 GHZ CHIP-SIZE ANTENNA FOR WIRELESS SENSOR NETWORKS , 2003 .

[7]  M. Maddela,et al.  A MEMS-based tunable coplanar patch antenna fabricated using PCB processing techniques , 2007 .

[8]  T. Akin,et al.  Dual-frequency reconfigurable slot dipole array with a CPW-based feed network using RF MEMS technology for X- and ka-band applications , 2007, 2007 IEEE Antennas and Propagation Society International Symposium.

[9]  Gabriel M. Rebeiz.  RF MEMS: Theory, Design and Technology , 2003 .

[10]  P.M. Mendes,et al.  Novel very small dual-band chip-size antenna for wireless sensor networks , 2004, Proceedings. 2004 IEEE Radio and Wireless Conference (IEEE Cat. No.04TH8746).

[11]  P. Blondy,et al.  A Wide Tuning Range MEMS Switched Patch Antenna , 2006, 2006 IEEE MTT-S International Microwave Symposium Digest.