本文選題：印刷偶極子天線 + 雙極化　； 參考：《華僑大學(xué)》2014年碩士論文

【摘要】：隨著LTE投入商用，2G、3G和4G將在移動通信網(wǎng)絡(luò)市場內(nèi)共存一段時間為人們提供移動通信服務(wù)。天線是無線網(wǎng)絡(luò)信號的出入口，，由于新的基站站點(diǎn)資源越來越難獲得，復(fù)用已有站點(diǎn)使其支持多制式網(wǎng)絡(luò)成為未來的網(wǎng)絡(luò)部署的主要途徑，研究支持多制式、小型化、低剖面、高性能的基站天線單元是非常具有實(shí)際意義的。 本論文研究與設(shè)計(jì)應(yīng)用于LTE、3G和部分2G通信系統(tǒng)的雙極化基站天線。本論文的創(chuàng)新成果具體為： 1、提出了一種寄生貼片結(jié)構(gòu)的印制偶極子天線單元。將一副短振子作為寄生貼片，放置在輻射臂的上方，通過雙臂的輻射場激勵寄生振子貼片。天線的電壓駐波比VSWR2.0阻抗匹配帶寬為1.54-3.64GHz，實(shí)現(xiàn)了80%的相對帶寬，與傳統(tǒng)的印制振子天線相比，天線有三個諧振點(diǎn)，相對帶寬提高了一倍。 2、提出了一種加載短路“T”形振子結(jié)構(gòu)的印制偶極子天線單元。將一副小的短振子作為高頻段的輻射振子，短路接在輻射臂的上方。天線有四個諧振點(diǎn),實(shí)現(xiàn)了80.5%的相對帶寬(VSWR2.0)，與傳統(tǒng)結(jié)構(gòu)印制偶極子天線相對帶寬相比提高了一倍。 3、提出了一種新型的分支線匹配的饋電巴倫結(jié)構(gòu)的印制偶極子天線單元。在不改變天線大小的基礎(chǔ)上，對傳統(tǒng)的“J”形饋電巴倫結(jié)構(gòu)進(jìn)行改進(jìn)，基于傳輸線理論分析方法計(jì)算了這種饋電巴倫具有寬頻帶匹配特性，并設(shè)計(jì)制作了天線，測試結(jié)果表明，天線實(shí)現(xiàn)了58%(VSWR1.5)的相對帶寬。 4、提出了一種新型的雙層貼片短路振子結(jié)構(gòu)的寬帶雙極化基站天線單元。雙層貼片結(jié)構(gòu)擴(kuò)展了天線帶寬，抑制了交叉極化比。提出了一種階梯狀的印制饋電巴倫，提高了雙端口的隔離度線。天線雙端口VSWR≤1.5的公共帶寬為66.7%，帶寬內(nèi)隔離度基本大于25dB。 5、提出了一種新型雙層貼片分支線匹配的饋電巴倫結(jié)構(gòu)的寬帶雙極化基站天線單元。結(jié)合雙層貼片結(jié)構(gòu)振子加載技術(shù)，大幅度的擴(kuò)展了天線帶寬，抑制了交叉極化比。雙極化天線兩端口的VSWR1.5的工作頻帶達(dá)到了57.6%相對帶寬（1.63GHz-2.95GHz），天線在整個工作頻帶內(nèi)方向圖穩(wěn)定。 6、基于LTE基站寬頻帶、小型化的要求，設(shè)計(jì)了一種24的8單元陣列天線，雙極化陣列天線各個雙極化天線單元端口具有1.8GHz-2.87GHz公共工作頻帶，實(shí)驗(yàn)結(jié)果表明該雙極化陣列天線具有良好的性能指標(biāo)。
[Abstract]:As LTE goes into business, 2G, 3G and 4G will provide mobile communication services for people in the mobile communication network market for a period of time. Antenna is the access of wireless network signals. As new base station site resources are becoming more and more difficult to obtain, reusing existing sites to support multi mode networks is the main approach to network deployment in the future. It is of great practical significance to support multi mode, miniaturized, low profile and high performance base station antenna units.
This paper studies and designs a dual polarized base station antenna for LTE, 3G and some 2G communication systems.
1, a printed dipole antenna unit with a parasitic patch structure is proposed. A pair of short vibrators is used as a parasitic patch, which is placed above the arm of the radiation arm, and excites the parasitic vibrator through the radiation field of the two arms. The impedance matching bandwidth of the antenna's voltage to Bobbi is 1.54-3.64GHz, and the relative bandwidth of the antenna is achieved, and the traditional printed vibrator is used. Compared with the antenna, the antenna has three resonance points, and the relative bandwidth has doubled.
2, a printed dipole antenna unit with short circuited "T" shaped oscillator structure is proposed. A small short vibrator is used as a radiant vibrator of the high frequency section. The short circuit is connected to the upper part of the arm. The antenna has four resonant points, which achieves 80.5% relative bandwidth (VSWR2.0), and increases the relative bandwidth compared with the traditional printed dipole antenna. Double.
3, a new type of branched line matched printed dipole antenna element with feed Baron structure is proposed. On the basis of not changing the size of the antenna, the traditional "J" shaped Baren structure is improved. Based on the transmission line theory analysis method, the broadband matching characteristic of the feed Baron is calculated, and the antenna is designed and fabricated. The test results show that the antenna achieves a relative bandwidth of 58% (VSWR1.5).
4, a new type of broadband dual polarization base station antenna unit with double layer patch short circuit oscillator is proposed. The double layer patch structure extends the antenna bandwidth and inhibits the cross polarization ratio. A stepped printed feed Baron is proposed, which improves the isolation line of the dual port. The common bandwidth of the dual port VSWR < 1.5 is 66.7%, and the bandwidth is separated. The degree of departure is basically greater than 25dB.
5, a new type of broadband dual polarization base station antenna unit with a feed Baren structure is proposed. Combined with double layer patch structure, the bandwidth of the antenna is greatly expanded and the cross polarization ratio is suppressed. The frequency band of VSWR1.5 with two port of dual polarized antenna reaches 57.6% relative bandwidth (1.63GHz-2.95G Hz), the antenna is stable in the whole working frequency band.
6, based on the requirement of LTE base station wide band and miniaturization, a kind of 24 8 unit array antenna is designed. The dual polarized antenna array with dual polarized antenna array has a common operating band of 1.8GHz-2.87GHz. The experimental results show that the dual polarized array antenna has good performance signifier.
【學(xué)位授予單位】：華僑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN828.6

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