A coplanar waveguide‐fed ultra‐wideband (UWB) composite right/left‐handed (CRLH) antenna is presented. It is designed by embedding CRLH unit‐cell on the top side and split‐ring resonator (SRR) on the bottom side of FR4 epoxy substrate. The UWB response is obtained by merging the resonances of CRLH unit‐cell and SRR with two additional resonances due to patch feed‐line and ground plane, respectively. Subsequently, the gain of UWB CRLH antenna is enhanced by loading two partial reactive impedance surfaces (PRISs) on the double layer FR4 substrate. First PRIS is embedded directly on the rear side of CRLH antenna (upper layer substrate) whereas the second PRIS is designed on the backside of the lower layer substrate. A considerable improvement in gain is observed over the frequency range from 6.2 to 10.6 GHz with peak enhancement of 1.75 dB. The proposed antenna is fabricated and measured. The measured results indicate −10 dB fractional bandwidth of 126.15% (3‐13.25 GHz) with realized gains of 2.2, 5.25, 5.5, and 7.3 dBi at 3.57, 7.46, 8.92, and 10.59 GHz, respectively. The simulated radiation efficiency is above 61% with a peak value of 86.21%. All measured and simulated results match reasonably well.

中文翻译：

---

增益提高的右/左手超宽带复合材料天线

提出了共面波导馈电超宽带（UWB）复合右/左手（CRLH）天线。它是通过在FR4环氧基板的顶部嵌入CRLH单元电池和在其底部嵌入开口环谐振器（SRR）来设计的。UWB响应是通过将CRLH单元电池和SRR的谐振与分别由贴片馈线和接地平面引起的两个附加谐振合并而获得的。随后，通过在双层FR4基板上加载两个部分电抗阻抗表面（PRIS），可以提高UWB CRLH天线的增益。第一个PRIS直接嵌入CRLH天线（上层基板）的背面，而第二个PRIS设计在下层基板的背面。在6.2至10.6 GHz的频率范围内观察到增益的显着改善，峰值增强为1.75 dB。所提出的天线已制成并测量。测量结果表明，-10dB的部分带宽为126.15％（3-13.25 GHz），在3.57、7.46、8.92和10.59 GHz处分别实现2.2、5.25、5.5和7.3 dBi的增益。模拟辐射效率高于61％，峰值为86.21％。所有测量和模拟结果都相当匹配。