Institute of Electrical and Electronics Engineers Inc.;IEEE
摘要:
摘要： A frequency-reconfigurable slot-loop antenna with a tunable matching network (TMN) is designed, fabricated, and measured. The frequency-reconfigurable antenna is designed by loading ferroelectric (FE) varactors along a slot loop. The varactor-loaded slot-loop antenna is fed using a coplanar waveguide (CPW) line rather than a microstrip line to preserve the advantage of being uniplanar. However, because it is more difficult to achieve a good matching over wide bandwidth with a direct CPW feed, we propose to add a TMN. It is found that the TMN can be realized using a series varactor, which does not increase the size of the antenna. Measurement results show that by adjusting the bias of the FE varactors from 0 to 15 V, the operating frequency of the antenna can be tuned from 6.71 to 9.14 GHz, translating into a 30.6% frequency tuning range (FTR). At 6.71 GHz, the size of the slot loop is 0.056 λ 0 ×0.056λ 0 . When biased at 15 V, the antenna gain is -3.1 dBi. Over the entire FTR, the return loss is greater than 20 dB, demonstrating the effectiveness of the tunable matching technique. 其他題名： LAWP 出版者： IEEE 出版日期： 2015 出處： IEEE antennas and wireless propagation letters, 2015, Vol.14, p.614-617 資源來源： IEEE Electronic Library (IEL) 識別號： ISSN: 1536-1225 識別號： EISSN: 1548-5757 識別號： DOI: 10.1109/LAWP.2014.2375334 識別號： CODEN: IAWPA7
