A monopolar patch antenna with very wide impedance bandwidth

• Published in: IEEE transactions on antennas and propagation Vol. 53; no. 2; pp. 655 - 661
• Main Authors: Lau, K.-L., Li, P., Luk, K.-M.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.02.2005; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antenna radiation patterns; Antennas; Applied sciences; Azimuth; Bandwidth; Circularity; Exact sciences and technology; Gain; Ground plane; Impedance; Monopolar patch antenna; Monopoles; Patch antennas; Radiocommunications; Telecommunications; Telecommunications and information theory; Wire; Wires; Monopolar patch antenna; Wire antenna; Return loss; Telecommunication system; Wireless telecommunication; Printed antenna; Monopole antenna; Mobile communication; Radiation pattern
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2004.841322

A monopolar patch antenna that utilizes a bandwidth broadening technique is investigated experimentally and numerically. The proposed antenna consists of a monopole that is formed by connecting four trapezoidal plates orthogonally. A circular patch, which is shorted to the circular ground plane by four shorting wires, is placed at the top of the monopole. The antenna possesses 10-and 14-dB return loss bandwidths of 138% and 107.2% respectively, which is about 49 times that of the corresponding monopolar wire-patch antenna. Also, it provides monopole-like radiation patterns over such wide operating bandwidth. As the proposed antenna can achieve such wide impedance bandwidth with relatively low profile, it is very suitable for multi-band mobile communication systems.