Journal
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Volume 62, Issue 3, Pages 1461-1464Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2013.2293787
Keywords
Isotropic radiation pattern; rotated field; rotated sequential feeding network; wideband antenna
Funding
- National Basic Research Program of China [2013CB329002]
- National High Technology Research and Development Program of China (863 Program) [2011AA010202]
- National Natural Science Foundation of China [61301001]
- National Science and Technology Major Project of the Ministry of Science and Technology of China [2013ZX03003008-002]
- China Postdoctoral Science Foundation [2013M530046]
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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.
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