التفاصيل البيبلوغرافية
| العنوان: |
Annular-ring slot antenna designs with circular polarization radiation. |
| المؤلفون: |
Sim, C. Y. D.1 cysim@fcu.edu.tw, Weng, W. C.2 wcweng@ncnu.edu.tw, Chang, M. H.1 m9949556@fcu.edu.tw, Chen, B. Y.1 m0203723@fcu.edu.tw |
| المصدر: |
International Journal of RF & Microwave Computer-Aided Engineering. May2015, Vol. 25 Issue 4, p337-345. 9p. |
| مصطلحات موضوعية: |
*SLOT antennas, *CIRCULAR polarization, *MICROSTRIP antennas, *BANDWIDTHS, *RADIATION, *IEEE 802.16 (Standard) |
| مستخلص: |
ABSTRACT The design of a microstrip-fed annular-ring slot antenna (ARSA) with circular polarization (CP) radiation is initially studied. To obtain CP radiation with broad 3-dB axial ratio (AR) bandwidth that can cover the WiMAX 2.3 GHz (2305-2320 MHz, 2345-2360 MHz) and WLAN 2.4 GHz (2400-2480 MHz) bands, a novel technique of extending an inverted L-shaped slot from the bottom section of the annular-ring is proposed. To suppress the harmonic modes induced by the CP ARSA, the technique of integrating a defected ground structure into the annular-ring slot is further introduced. From the measured results, 10-dB impedance bandwidth and 3-dB AR bandwidth of 44.86 and 9.68% were achieved by the proposed harmonic suppressed CP ARSA. Furthermore, average gain and radiation efficiency of ∼4.7 dBic and 71%, respectively, were also exhibited across the bands of interest. © 2014 Wiley Periodicals, Inc. Int J RF and Microwave CAE 25:337-345, 2015. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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