用于超寬帶天線(xiàn)平衡饋電的低剖面巴侖設(shè)計(jì):提出了一種低剖面超寬帶巴侖的設(shè)計(jì)方法，該巴侖為指數(shù)漸變線(xiàn)巴侖的一種改進(jìn)形式。根據(jù)該方法設(shè)計(jì)的兩種巴侖，可分別用于雙臂平面螺旋天線(xiàn)和雙極化對(duì)數(shù)周期天線(xiàn)平衡饋電。測(cè)試結(jié)果表明，在0.4GHz~15GHz頻帶內(nèi)，巴侖的駐波系數(shù)均小于2，巴侖接天線(xiàn)的駐波系數(shù)最大不超過(guò)3，且天線(xiàn)連同巴侖的總高度均小于6cm。
關(guān)鍵詞： 超寬帶低剖面 巴侖 天線(xiàn)

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