應用共平面波導與互補型步階式諧振器於雙方環之數位廣播電視UHF寬頻帶天線

CPW-fed with Complementary SIR Double Square-loop DTV UHF Wide-band Antenna

邱思閎(Ssu-Hung Chiu)

指導教授 ： 劉智群

健行科技大學/電資學院/電機工程所/碩士(2011年)

摘要

本論文設計兩支環形微帶天線，應用於UHF頻帶(470MHz~860MHz)數位廣播電視的微帶天線。在設計架構上，運用共平面波導饋入與互補型步階式諧振器的結構與方環形做結合。當中，共平面波導饋入是針對50歐姆微帶線設計，以便連接環形結構與50歐姆SMA接頭；步階式諧振器是針對響應所產生的諧振特性，使頻率響應產生多重諧振特性來達到寬頻的作用。在頻譜特性上，於數位廣播電視頻帶與反射損耗小於-10dB的條件下，有大於45%的響應頻寬。在場型分析上，探討在正規化後的x-z剖面與y-z剖面的輻射場型圖，其中x-z剖面的場型圖，呈現出相似於偶極天線的輻射場型；在y-z剖面的場型圖，呈現出相似於全向性的場型特徵，從模擬值與量測值得知道的結果是相符合的。

關鍵字

環形天線 ； 微帶天線 ； 步階式諧振器 ； 共平面波導饋入

並列摘要

In this thesis, two loop antenna, used in UHF band (470MHz ~ 860MHz) radio and television digital microstrip antenna. In the design of architecture, there is the use of coplanar waveguide feed and complementary step resonator structure and the side ring to do with. Among the coplanar waveguide feed is designed for 50 ohm microstrip line in order to connect the ring structure and 50 ohm SMA connectors; step resonator is produced for the resonant response characteristics, the resonant frequency response to generate multiple role of broadband. In the spectrum, and in digital broadcast TV bands and the return loss is less than-10dB under the condition of a bandwidth of greater than 45% of the respondents. In-field analysis, the normalization of xz section and yz after radiation pattern graph profile, which xz section pattern diagram, showing a similar dipole antenna radiation pattern; in the yz section of the pattern graph, showing a similar pattern in all isotropic characteristics, from the simulated and measured results are worth knowing consistent.

並列關鍵字

loop antenna ； microstrip antenna, SIR ； CPW-fed

參考文獻

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