volume | PIER Journals

Abstract

A new antenna structure is formed by combining the concept of reconfigurable planar antenna array (RPAA) with the parasitic elements to produce beam steering patterns. The antenna has been integrated with the PIN diode switches that enable the beam to be steered in the desired direction. This has been done by changing the switch state to either on or off mode. In this work, a number of parasitic elements have been applied to the antenna, namely reflectors and directors. They are placed in between the driven elements, which is aimed to improve the beam steering angle. With such configuration, the main beam radiated by the array can be tilted due to the effect of mutual coupling between the driven elements and parasitic elements (reflectors and director). The unique property of this antenna design is that instead of fabricating all together in the same plane, the antenna's feeding network is separated from the antenna radiating elements (the patches) by an air gap distance. This allows reducing the spurious effects from the feeding line. The optimization results for the resonant frequencies of the antennas with variable air gap heights are also been studied. The antenna is made for 5.8 GHz. Good agreement is achieved between the simulation and measurement.

1. Shynu, S. V., G. Augustin, C. K. Aanandan, P. Mohanan, and K. Vasudevan, "Design of compact reconfigurable dual frequency microstrip antennas using varactor diodes," Progress In Electromagnetics Research, Vol. 60, 197-205, 2006.
doi:10.2528/PIER05120101 Google Scholar

2. Mak, A. C. K., C. R. Rowell, R. D. Murch, and C. L. Mak, "Reconfigurable multiband antenna designs for wireless communication devices," IEEE Transactions on Antennas and Propagation, Vol. 55, 1919-1928, 2007.
doi:10.1109/TAP.2007.895634 Google Scholar

3. Panagamuwa, C. J., A. Chauraya, and J. C. Vardaxoglou, "Frequency and beam reconfigurable antenna using photoconducting switches," IEEE Transactions on Antennas and Propagation, Vol. 54, 449-454, 2006.
doi:10.1109/TAP.2005.863393 Google Scholar

4. Cetiner, B. A., H. Jafarkhani, Q. Jiang-Yuan, Y. H. Jae, A. Grau, and F. de Flaviis, "Multifunctional reconfigurable MEMS integrated antennas for adaptive MIMO systems," IEEE Communications Magazine, Vol. 42, 62-70, 2004.
doi:10.1109/MCOM.2004.1367557 Google Scholar

5. Wei, W.-B., Q.-Z. Liu, Y.-Z. Yin, and H.-J. Zhou, "Reconfigurable microstrip patch antenna with switchable polarization," Progress In Electromagnetics Research, Vol. 75, 63-68, 2007.
doi:10.2528/PIER07053002 Google Scholar

6. Ali, M. T., M. R. B. Kamarudin, T. A. Rahman, R. Sauleau, and M. N. M. Tan, "Design of reconfigurable multiple elements microstrip rectangular linear array antenna," Progress In Electromagnetics Research C, Vol. 6, 21-35, 2009.
doi:10.2528/PIERC08122101 Google Scholar

7. Kamarudin, M. R. B. and P. S. Hall, "Switched beam antenna array with parasitic elements," Progress In Electromagnetics Research B, Vol. 13, 187-201, 2009.
doi:10.2528/PIERB09011603 Google Scholar

8. Chiao, J.-C., Y. Iao, I. M. Chio, M. Delisio, and L.-Y. Lin, "MEMS reconfigurable Vee antenna," Digest of the 1999 IEEE MTT Intl. Microwave Symposium, Vol. 4, 1515-1518, 1999.

9. Pringle, L. N., P. G. Friederich, S. P. Blalock, G. N. Kiesel, P. H. Harms, D. R. Denison, E. J. Kuster, T. L. Fountain, and G. S. Smith, "GTRI reconfigurable aperture design," IEEE Antennas and Propagation Society International Symposium, Vol. 1, 473-476, 2002. Google Scholar

10. Schaffner, J. H., R. Y. Loo, D. F. Sievenpiper, F. A. Dolezal, G. L. Tangonan, J. S. Colburn, J. J. Lynch, J. J. Lee, S. W. Livingston, R. J. Broa, and M. Wu, "Reconfigurable aperture antennas using RF MEMS switches for multi-octave tunability and beam steering ," Antennas and Propagation Society International Symposium, Vol. 1, 321-324, 2000.

11. Guha, D., "Resonant frequency of circular microstrip antennas with and without air gaps ," IEEE Transactions on Antennas and Propagation, Vol. 49, 55-59, 2001.
doi:10.1109/8.910530 Google Scholar

12. Ali, M. T., T. B. A. Rahman, M. R. B. Kamarudin, M. N. M. Tan, and R. Sauleau, "A planar antenna array with separated feed line for higher gain and sidelobe reduction," Progress In Electromagnetics Research C, Vol. 8, 69-82, 2009.
doi:10.2528/PIERC09041301 Google Scholar

13. Thiel, D. V., S. O'Keefe, and W. L. Jun, "Electronic beam steering in wire and patch antenna systems using switched parasitic elements," Antennas and Propagation Society International Symposium, AP-S. Digest, 1996, Vol. 1, 534-537, 1996.
doi:10.1109/APS.1996.549655 Google Scholar

14. Gray, D., L. J. Wei, and D. V. Thiel, "Electronically steerable Yagi-Uda microstrip patch antenna array," IEEE Transactions on Antennas and Propagation, Vol. 46, 605-608, 1998.
doi:10.1109/8.668900 Google Scholar

15. Mori, K., K. Uchida, and H. Arai, "Active antenna using parasitic elements," IEEE Antennas and Propagation Society International Symposium , Vol. 3, 1636-1639, 1998.

16. Zhang, S., G. H. Huff, J. Feng, and J. T. Bernhard, "A pattern reconfigurable microstrip parasitic array," IEEE Transactions on Antennas and Propagation, Vol. 52, 2773-2776, 2004.
doi:10.1109/TAP.2004.834372 Google Scholar

Dr. Mohd Tarmizi Ali

Dr. Mohd Nor Md Tan

Professor Tharek Bin Abdul Rahman

Professor Muhammad Ramlee Kamarudin

Dr. Mohd Faizal Bin Jamlos

Dr. Ronan Sauleau