用于超寬帶天線平衡饋電的低剖面巴侖設計:提出了一種低剖面超寬帶巴侖的設計方法，該巴侖為指數漸變線巴侖的一種改進形式。根據該方法設計的兩種巴侖，可分別用于雙臂平面螺旋天線和雙極化對數周期天線平衡饋電。測試結果表明，在0.4GHz~15GHz頻帶內，巴侖的駐波系數均小于2，巴侖接天線的駐波系數最大不超過3，且天線連同巴侖的總高度均小于6cm。
關鍵詞： 超寬帶低剖面 巴侖 天線

Abstract: The design method of a low-profile ultra-wideband balun, a modification of the traditional exponential tapered balun, is proposed in this paper. Based on this method, two kinds of balun are designed, which can be used to feed the two arm spiral antenna and dual-polarization log-period antenna. The experiment results indicate that the VSWR of the two baluns are less than 2 during the frequency band 0.4GHz~15GHz, and a VSWR no more than 3 can also be obtained during the whole band when connecting the two baluns to the antennas. Moreover, the whole heights of the two antennas when connecting with baluns are less than 6 cm.
Key words: Ultra-wideband Low-profile Balun Antenna