《電子技術(shù)應(yīng)用》
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基于串并聯(lián)結(jié)合饋電的高增益垂直極化全向天線
2022年電子技術(shù)應(yīng)用第10期
王 琛1,,徐慧娟2,,楊 龍3,,周文濤3,王 娜3
1.航天系統(tǒng)部裝備部軍代局駐成都地區(qū)軍代室,,四川 成都610036; 2.中國人民解放軍63620部隊(duì),,甘肅 蘭州730000,;3.西南電子技術(shù)研究所,四川 成都610036
摘要: 采用基于串并聯(lián)結(jié)合饋電的方法設(shè)計(jì)了一種高增益垂直極化全向天線,。采用印刷偶極子天線作為基本輻射單元,;將4個(gè)該基本輻射單元組成串饋陣列以提高天線增益;為進(jìn)一步提高天線增益和改善串饋陣方向圖的頻偏特性,,將兩個(gè)四元串饋陣列并聯(lián)起來,,并通過微帶線從并聯(lián)中心饋電;最后將金屬支撐與微帶饋電網(wǎng)絡(luò)對(duì)稱設(shè)計(jì),,實(shí)現(xiàn)良好的饋電和改善水平面方向圖的不圓度,。制作了天線實(shí)物并進(jìn)行了測試,實(shí)物的測試結(jié)果表明,,天線在7.4 GHz~8.4 GHz的頻段內(nèi)VSWR≤2,,阻抗帶寬為13%。在工作頻段內(nèi)天線方向圖不圓度小于2.5 dB,,增益大于8 dB,。此外,天線的橫向尺寸小于0.7λ0,。該天線結(jié)構(gòu)緊湊,、加工方便、性能優(yōu)良, 可應(yīng)用于寬帶,、高增益,、全向空域覆蓋的通信系統(tǒng)中。
中圖分類號(hào): TN820.1
文獻(xiàn)標(biāo)識(shí)碼: A
DOI:10.16157/j.issn.0258-7998.222874
中文引用格式: 王琛,,徐慧娟,,楊龍,等. 基于串并聯(lián)結(jié)合饋電的高增益垂直極化全向天線[J].電子技術(shù)應(yīng)用,,2022,,48(10):97-102.
英文引用格式: Wang Chen,,Xu Huijuan,Yang Long,,et al. A high gain vertically polarized ominidirectional antenna based on series-parallel fending method[J]. Application of Electronic Technique,,2022,48(10):97-102.
A high gain vertically polarized ominidirectional antenna based on series-parallel fending method
Wang Chen1,,Xu Huijuan2,,Yang Long3,Zhou Wentao3,,Wang Na3
1.The Military Representative Office of the Equipment Department of the Aerospace System Department in Chengdu,, Chengdu 610036,China,; 2.Unit 63620 of the PLA,,Lanzhou 730000,China,;3.Southwest China Institute of Electronic Technology,,Chengdu 610036,China
Abstract: A vertically polarized omnidirectional antenna with high gain is proposed based on the method of series-parallel feeding. Firstly, a printed dipole antenna is used as the basic radiation unit, and then four of the basic radiation units are formed into a series-fed array to improve the antenna gain. Secondly, in order to further increase antenna gain and make the antenna patterns of the series-fed array desensitize to frequency, two four-element series-fed arrays are connected in parallel and fed from the center through a parallel feed network. Finally, the metal support and the microstrip feeding network are symmetrically designed to achieve good feeding and improve the unevenness of the pattern in the horizontal plane. The antenna was fabricated and measured. The experimental results show that the impedance bandwidth of the antenna is 13% and the VSWR≤2 in the frequency range of 7.4 GHz~8.4 GHz. The gain variations in the horizontal plane less than 2.5 dB and the gains are more than 8 dB across the operating band. In addition, the transverse size of the antenna is less than 0.7λ0. The antenna has the advantages of compact structure, convenient processing and excellent performance. It can be used in wide-band, high-gain and wide-angle space coverage communication systems.
Key words : printed dipole,;series-parallel fending,;high gain;vertically polarized omnidirectional antenna

0 引言

    隨著現(xiàn)代無線通信技術(shù)的飛速發(fā)展,,具有穩(wěn)定的全向波束覆蓋能力的垂直極化全向天線越來越受到人們的重視[1-4],。然而它們中的大多數(shù)很難同時(shí)滿足寬帶寬、高增益,、結(jié)構(gòu)緊湊,、簡單可行的饋電網(wǎng)絡(luò)等要求,大大限制了其應(yīng)用范圍,。

    通常,,垂直偶極子和單極子是最常見的垂直極化全向天線[5-6]。然而,,它們的窄帶寬和有限的增益仍然是未來應(yīng)用的挑戰(zhàn),。通過將長同軸電纜的內(nèi)外導(dǎo)體互換,同軸共線天線可以獲得10 dB[7-8]以上的增益,,但是阻抗帶寬往往較窄(小于10%),。然后,學(xué)者提出了一種全向平面微帶天線[9]和一種全向平面縫隙天線[10],,它們分別由一系列交替布置在每個(gè)結(jié)合處的微帶天線段和一系列刻蝕在兩條平行帶線上的矩形環(huán)槽組成,,雖然它們可以達(dá)到6 dB以上的高增益,但是它們的阻抗帶寬都小于10%,,而且它們的波束方向?qū)ぷ黝l率很敏感,,導(dǎo)致不穩(wěn)定的輻射方向圖,。文獻(xiàn)[11]中的平面垂直極化全向天線采用背靠背的印刷偶極子單元排列獲得較高的增益,但帶寬僅為5.5%,。在文獻(xiàn)[12]中,采用非對(duì)稱偶極子和寄生條可實(shí)現(xiàn)雙頻帶寬,,相對(duì)帶寬分別為20.2%和21.3%,,它在兩個(gè)頻帶的增益都在6.5 dBi以上。在文獻(xiàn)[13]中,,學(xué)者提出了一種新型的垂直極化全向天線,,該天線采用3個(gè)單元,每個(gè)單元由三維偶極子和寄生偶極子垂直安裝組成,,每個(gè)單元與與相鄰單元呈120°夾角,,使阻抗帶寬超過30%,增益從5.7 dB增加到8.0 dB,。文獻(xiàn)[14]提出了一種非對(duì)稱U形柱寬帶全向天線陣列,,采用非對(duì)稱U形柱天線激勵(lì)附加諧振模式,其工作帶寬可超過30%,。然而不足的是,,文獻(xiàn)[12]-[14]中的這3個(gè)天線的良好性能均以犧牲橫向尺寸為代價(jià),造成龐大而復(fù)雜的幾何形狀,。




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作者信息:

王  琛1,徐慧娟2,,楊  龍3,,周文濤3,王  娜3

(1.航天系統(tǒng)部裝備部軍代局駐成都地區(qū)軍代室,,四川 成都610036,;

2.中國人民解放軍63620部隊(duì),甘肅 蘭州730000,;3.西南電子技術(shù)研究所,,四川 成都610036)




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