Abstract
The compact microstrip monopole antenna (CMMA) is a novel antenna design that combines a microstrip patch antenna with a 3D structure to attain a highly directive, broadband, compact antenna. A tri-lobed patch (TLP) is designed to minimize the patch's area while reducing the antenna's operating frequency. A grounding wall (GW) connects the patch to the ground plane and a vertical-enclosure wall (VEW) extends up, away from portions of the patch's perimeter. This VEW supplies the antenna with a higher directivity in the radial direction and also reduces the operating frequency. The CMMA was designed to operate at 2.23 GHz, but experimental results have shown this antenna resonates at 2.05 GHz which is on the order of approximately λ0/11.6 with respect to the antenna's largest dimension, with a directivity and bandwidth of 6.0 dBi and 130 MHz (6.3%), respectively. This miniature, radially emitting antenna makes the CMMA attractive for planetary-based surface-to-surface communications. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 521–524, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21397
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