TW393805B - Compact circularly polarized microstrip antenna with a group of four 90 DEG -bent slots - Google Patents

Compact circularly polarized microstrip antenna with a group of four 90 DEG -bent slots Download PDF

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Publication number
TW393805B
TW393805B TW87107932A TW87107932A TW393805B TW 393805 B TW393805 B TW 393805B TW 87107932 A TW87107932 A TW 87107932A TW 87107932 A TW87107932 A TW 87107932A TW 393805 B TW393805 B TW 393805B
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TW
Taiwan
Prior art keywords
antenna
circularly polarized
microstrip
square
microstrip antenna
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Application number
TW87107932A
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English (en)
Inventor
Jin-Lu Weng
Jiun-Kuen Wu
Original Assignee
Weng Jin Lu
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Application filed by Weng Jin Lu filed Critical Weng Jin Lu
Priority to TW87107932A priority Critical patent/TW393805B/zh
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Publication of TW393805B publication Critical patent/TW393805B/zh

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Description

A7 五、發明説明( 傳統的微帶天線操作於二分之一操作波長之下。這項特性 大大的限制了微帶天線在數百MHz頻段上的應用,如極高頻 (VHF)及超高頻(UHF)等頻段。因為在這些頻段下,傳統微帶天 線所需的尺寸太大,並不實用。而為了克服此項缺點,先前熟 知的技術主要有二··一種是利用在微帶金屬片(micr〇strip patch)上蝕刻一個十字型非等長的槽孔,饋入方式選擇使用槽 孔耦合電磁場至微片金屬片「參閱參考文獻。為之。另一種 是利用在微帶金屬片上蝕刻四根不等長的直線型槽孔,饋入方 式選擇同軸線饋入至微片金屬片「參閱參考文獻2」為之。這 些習知的技術,雖然可以達成縮小型圓極化波微帶天線的設 計,但利用十字槽孔的兩臂或四根直線型槽孔的長度不等長的 议计相當費時耗力,因不等長的槽孔對於頻率以及輻射電場的 相位在較大的天線尺寸縮小比例時,相當的靈敏;故此項習知 的技術,在微帶天線縮小比例大時,其應用價值相對地變的非 常有限' 在本發明中,我們提出一種新的縮小型圓極化波操作的微 f天線設計r參閱圖式1令所示」。在此天線設計下,天線的 最低共振頻率可以降為傳統微帶天線的33%,亦即,在固定需 求的操作頻率下,本項天線設計的尺寸可以降為傳統微帶天線 的50%以下。而傳統圓極化微帶天線的設計即是如圖幻中所示 未加有四個九十度_曲槽孔者。而本項發明設計之所以能有效 地縮小天線尺寸及製作較為容易,乃是根據一般天線產生圓極 化波輻射的兩項自然設計準則加以分開設計。此兩項準則為: 二遠場的轄射場量在其兩垂直方尚的公香士 本紙張尺刀重大;相4 A7 ί·:·Μέ:·?:..?夹4-¾.¾ 員二;·ίί‘费i'ftiiip**
夂呔張尺度通用中®困家標準(CSS ) Α4^格(21〇Xh7公釐) 赶濟部令央樣在局貝工消费合作社印裝 A7 --------------- - B7 五、發明説明(3 ) ' ' — 寸的傳統圓極化波微帶天線操作頻率為248_z,故操作頻率 可以降為傳統微帶天線的33%ιχτ,亦即’在@定需求的操作 頻率下,本項天線設計的尺寸可以縮為傳統圓極化波微帶天 線的50%以下。 本發明比傳統縮小型圓極化輻射微帶天線在製作上相對容 易原因有二: 、本發明在不同天線尺寸縮小比例下,同軸線館入位置皆 在同一位置上。 一、本發明在不同天線尺寸縮小比例下,完成圓極化波設計 所需的第二準則中所使用的對角截角所截除的小區域面積 皆相同。 故本發明比傳統縮小型圓極化輻射微帶天線可更容易地達成 縮小型圓極化操作微帶天線的創作目的。綜觀上述,將其應 用在移動式通訊系統上,作為無線通訊使用之接收與發射天 線,相當具有產業利用性之實用目的。 參考文獻: 1. Iwasaki, Η: ' A circularly polarized small-size microstrip antenna with a cross slot', IEEE Tram. Antennas Propagat., vol. 44, pp. 1399-1401, 1996. 2. Wong, K.L, and Wu, J.Y.: 'Single-feed small circularly polarised square microstrip antenna', Electron. Lett., vol. 33, no. 22, pp. 1833-1834, 1997. 本纸ft尺度通用中0國家#準(C‘\s ) Α4規格(210Χ297公麖) (請先閲讀背面之注$項^填.^本X) •裝 -訂 線|

Claims (1)

  1. i? 六、申請專利範困 L3縮小型圓極化波操作的微帶天線,係指在微帶天線之 且將金屬片内’麵四個等長具90度變曲細縫槽孔 寸的小金^喃直角巾的兩鑛㈣知目同尺 2如申請專卿第—項所述之縮小細極化波操作的微帶 f ’其中正方形微片金屬片製作在一健地基底層上。 3. 如:請專職圍第—項所述之縮小型圓極化波操作的微帶 天,其中每個90度擎曲槽孔的兩臂等長。 4. 如:請專利範圍第—項職之縮小㈣極化絲作的微 天,其中四個等長具90度f曲槽孔的f曲位置置於正方 形微片金屬片的兩個對角線上,且對稱於正方形微片金屬 月的中心點。 5. 如申請專利範圍第—項所述之縮小型圓極化波操作的 天線,其天線的饋入方式為同軸線饋入。 頁 裝 訂 線 經濟部中夹標準局負工消费合作社印装
TW87107932A 1998-05-20 1998-05-20 Compact circularly polarized microstrip antenna with a group of four 90 DEG -bent slots TW393805B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW87107932A TW393805B (en) 1998-05-20 1998-05-20 Compact circularly polarized microstrip antenna with a group of four 90 DEG -bent slots

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW87107932A TW393805B (en) 1998-05-20 1998-05-20 Compact circularly polarized microstrip antenna with a group of four 90 DEG -bent slots

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TW393805B true TW393805B (en) 2000-06-11

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105609942A (zh) * 2015-12-21 2016-05-25 浙江大学 一种吸收任意方向线极化入射波的微波能量接收平板
CN105990682A (zh) * 2015-02-04 2016-10-05 启碁科技股份有限公司 微带天线收发器

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105990682A (zh) * 2015-02-04 2016-10-05 启碁科技股份有限公司 微带天线收发器
CN105990682B (zh) * 2015-02-04 2019-05-14 启碁科技股份有限公司 微带天线收发器
CN105609942A (zh) * 2015-12-21 2016-05-25 浙江大学 一种吸收任意方向线极化入射波的微波能量接收平板
CN105609942B (zh) * 2015-12-21 2018-02-27 浙江大学 一种吸收任意方向线极化入射波的微波能量接收平板

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