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Novel integrated planar monopole antennas with various microstrip resonators are presented. The proposed integrated antennas consist of wideband planar monopole antennas and electromagnetically coupled microstrip resonators producing band-notched characteristics. Various types of microstrip resonators such as open-circuited line resonator, short-circuited line resonator, closed-loop resonator and open-loop resonator are described. The proposed designs are suitable for wideband antennas with narrowband interferer rejection characteristic or multi-band antennas. [ABSTRACT FROM AUTHOR]

A wideband planar monopole antenna with an L-shape ground plane is presented. The antenna also has a frequency-notching characteristic. By etching a half-wavelength U-shaped slot in the interior of the radiation element, the frequency-notching characteristic is created. This paper presents the design and experimental results of the proposed antenna. Moreover, this study also investigates the tuning effects of the geometry parameters on impedance matching. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 563–566, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21052 [ABSTRACT FROM AUTHOR]