一種新型三頻PIFA天線設(shè)計(jì)

趙歡歡,姚愛琴,孫運(yùn)強(qiáng),楊建旭

(中北大學(xué) 儀器科學(xué)與動(dòng)態(tài)測(cè)試教育部重點(diǎn)實(shí)驗(yàn)室,山西 太原　030051)

?

一種新型三頻PIFA天線設(shè)計(jì)

趙歡歡,姚愛琴,孫運(yùn)強(qiáng),楊建旭

(中北大學(xué) 儀器科學(xué)與動(dòng)態(tài)測(cè)試教育部重點(diǎn)實(shí)驗(yàn)室,山西 太原030051)

摘要針對(duì)天線的多頻問題,提出一種新型的三頻段平面倒F天線(PIFA天線),該結(jié)構(gòu)采用在輻射貼片上開U形槽和∏形槽來實(shí)現(xiàn)。通過HFSS13.0對(duì)天線模型進(jìn)行仿真分析,使得天線最終工作于GSM(890～960 MHz)、DCS(1 710～1 880 MHz)和ISM2 400 MHz(2 400～2 484 MHz)3個(gè)頻段。仿真結(jié)果表明,3個(gè)頻段的相對(duì)帶寬分別為10%、6%和11%,能滿足通信要求。此外,天線整體輻射性能良好,且結(jié)構(gòu)簡(jiǎn)單。

關(guān)鍵詞PIFA天線;開槽;無線通信

Design of a Novel Tri Band PIFA Antenna

ZHAO Huanhuan,YAO Aiqin,SUN Yunqiang,YANG Jianxu

(Dynamic Testing Laboratory of Instrumentation Science of the Ministry of Education,North University of China,Taiyuan 030051,China)

AbstractAiming at the problem of multi frequency antenna,a novel planar inverted F antenna (PIFA antenna) is proposed by using the U shaped groove and groove on the radiation patch.Through the simulation analysis of the antenna model by HFSS13.0,the antenna is made up of the three frequency bands of GSM (890~960 MHz),DCS (1 710~1 880 MHz) and ISM2 400 MHz (2 400~2 484 MHz).The results show that the relative bandwidths of the three frequency bands are 10%,6% and 11%,respectively,which meet the requirements of communication.The antenna has good overall radiation performance and simple structure.

KeywordsPIFA antenna;slotting;wireless communication

隨著現(xiàn)代無線通信的急速發(fā)展,無線設(shè)備終端越來越向小型化、多功能化等方向發(fā)展,以及提高對(duì)于系統(tǒng)集成度的要求,小型雙頻甚至多頻微帶天線也逐漸成為熱點(diǎn)。微帶天線實(shí)現(xiàn)雙多頻工作的方法有多種,根據(jù)不同的尺寸及性能要求,實(shí)現(xiàn)工作的方法也不盡相同。一般,實(shí)現(xiàn)雙多頻工作的方式有[1]:加載集總元件[2-4]、多層貼片[5]、多模正交[6]和縫隙加載等。對(duì)于PIFA天線實(shí)現(xiàn)多頻段工作,通常使用雙饋點(diǎn)或者在PIFA天線輻射金屬片上采用開槽的技術(shù)來設(shè)計(jì)。但使用雙饋點(diǎn)時(shí),調(diào)諧頻率和調(diào)諧范圍受到一定限制,所以,在PIFA天線的實(shí)際設(shè)計(jì)中,多采用開槽的方式來實(shí)現(xiàn)多頻工作。文獻(xiàn)[7]采用彎折開槽縫隙加載結(jié)構(gòu)的微帶天線實(shí)現(xiàn) DCS和 WLAN 的雙頻工作特性。文獻(xiàn)[8~9]是采用樹狀分形方法設(shè)計(jì)性能良好的雙頻天線。

1天線結(jié)構(gòu)設(shè)計(jì)與理論分析