A Wideband Isotropic Radiated Planar Antenna Using Sequential Rotated L-Shaped Monopoles

• Published in: IEEE transactions on antennas and propagation Vol. 62; no. 3; pp. 1461 - 1464
• Main Authors: Deng, Changjiang, Li, Yue, Zhang, Zhijun, Feng, Zhenghe
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01-03-2014; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antenna measurements; Antenna radiation patterns; Antennas; Applied sciences; Bandwidth; Delay; Deviation; Dipole antennas; Exact sciences and technology; Feeding; Gain; Gain measurement; Isotropic radiation pattern; Monopoles; Noise levels; Radiocommunications; Reflection coefficient; rotated field; rotated sequential feeding network; Telecommunications; Telecommunications and information theory; Wideband; wideband antenna; Prototype; rotated field; Isotropic radiation pattern; Coverage; Broadband antennas; rotated sequential feeding network; Impedance matching; L shape; Wide band; wideband antenna; Radiation pattern; Phase delay; Plane antenna; Reflectance
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2013.2293787

In this communication, we have proposed a compact planar antenna for isotropic radiation pattern in a wide operating band. The proposed antenna consists of four sequential rotated L-shaped monopoles that are fed by a compact uniform sequential-phase (SP) feeding network with equal amplitude and incremental 90 ° phase delay. Based on the rotated field method, a full spatial coverage with gain deviation less than 6 dB is achieved in a wide operating band from 2.3 to 2.61 GHz, also with well-impedance matching. A prototype of the proposed antenna has been built and tested. The measured results, including the reflection coefficient, gain, and radiation patterns, are analyzed and compared with the simulated results.