Band-Notched Small Slot Antenna Based on Time-Domain Reflectometry Modeling for UWB Applications
Keywords:
Defected transmission line, microstrip slot antenna, time-domain modelingAbstract
A design of a compact band-notched slot antenna by using defected structures with time domain designing method for UWB applications is presented. By cutting two modified meander line slots in the ground plane, a new resonance at the higher frequencies is excited, and hence, much wider impedance bandwidth can be produced that provides an ultra-wideband (UWB) frequency range. To generate a band-notched characteristic, we use the step-impedance resonator (SIR) slot at feed-line which contains a rectangular slot with a W-shaped strip protruded inside the slot. The proposed antenna can operate from 3.07 to 12.91 GHz with frequency band-notched function in 5.12-5.96 GHz to avoid interference from WLAN systems. To verify the validation of the proposed antenna, the equivalent circuit based on time domain reflectometry (TDR) analysis is presented. The proposed antenna exhibits almost omnidirectional radiation patterns in UWB frequency range. The designed antenna has a small size of 20×20 mm2 .
Downloads
References
H. Schantz, The Art and Science of Ultra Wideband Antennas, Artech House, 2005.
M. Ojaroudi and A. Faramarzi, “Multi-resonance small square slot antenna for ultra-wideband applications,” Microwave and Optical Tech. Letters, vol. 53, no. 9, Sept. 2011.
A. Dastranj, A. Imani, and M. Naser-Moghaddasi, “Printed wide-slot antenna for wideband applications,” IEEE Transactions on Antenna and Propagations, vol. 56, no. 10, pp. 3097-3102, Oct. 2008.
M. Ojaroudi, G. Kohneshahri, and J. Noory, “Small modified monopole antenna for UWB application,” IET Microw, Antennas Propag., vol. 3, no. 5, pp. 863-869, Aug. 2009.
R. Rouhi, C. Ghobadi, J. Nourinia, and M. Ojaroudi, “Ultra-wideband small square monopole antenna with band notched function,” Microwave and Optical Tech. Letters, vol. 52, no. 8, Aug. 2010.
M. Ojaroudi, H. Ebrahimian, C. Ghobadi, and J. Nourinia, “Small microstrip-fed monopole printed monopole antenna for UWB applications,” Microwave and Optical Tech. Letters, vol. 52, no. 8, Aug. 2010.
W. J. Lui, C. H. Cheng, Y. Cheng, et al., “Frequency notched ultra wideband microstrip slot antenna with a fractal tuning stub,” Electronic Letters, no. 41, pp. 294-296, 2005.
S. Nikolaou, N. D. Kingsley, G. E. Ponchak, J. Papapolymerou, and M. M. Tentzeris, “UWB elliptical monopoles with a reconfigurable band notch using MEMS switches actuated without bias lines,” IEEE Transactions on Antenna and Propagation, vol. 57, no. 8, pp. 2242-2251, Aug. 2009.
A. Valizade, C. Ghobadi, J. Nourinia, and M. Ojaroudi, “A novel design of reconfigurable slot antenna with switchable band notch and multiresonance functions for UWB applications,” IEEE Antennas and Wireless Propagation Letters, vol. 11, no. 1, pp. 1166-1169, 2012.
H. D. Chen, H. M. Chen, and W. S. Chen, “Planar CPW-fed sleeve monopole antenna for ultrawideband operation,” IET Microw, Antennas Propag., vol. 152, no. 6, pp. 491-494, Dec. 2005.
A. B. Abdel-Rahman, A. K. Verma, A. Boutejdar, and A. S. Omar, “Control of bandstop response of hi-lo microstrip low-pass filter using slot in ground plane,” IEEE Trans. Microw. Theory Tech., vol. 52, no. 3, pp. 1008-1013, Mar. 2004.
C. H. Cheng, C. H. Tsai, and T. L. Wu, “A novel time domain method to extract equivalent circuit model of patterned ground structures,” IEEE Microw. Wireless Compon. Lett., vol. 17, no. 11, Nov. 2010.
M. Ojaroudi, N. Ojaroudi, and Y. Ebazadeh, “Dual band-notch small square monopole antenna with enhanced bandwidth characteristics for UWB applications,” ACES Journal, vol. 27, no. 5, pp. 420-426, May 2012.
Ansoft High Frequency Structure Simulation (HFSS), ver. 13, Ansoft Corporation, 2011.
Z. Chen, X. Wu, H. Li, N. Yang, and M. Y. W. Chia, “Considerations for source pulses and antennas in UWB radio systems,” IEEE Trans. Antennas Propag., vol. 52, no. 7, pp. 1739-1748, Jul. 2004.
