200845479 九、發明說明： 【發明所屬之技術領域】 本發明大體上係關於天線裝置，且更明確地說 於-種用於無線電通訊裝置(例如一行動電話)中的天後 置，其調適成用於具有非常低頻率的無線電訊號，例如刚 頻帶中的無線電訊號。 【先前技術】 内置天線（internal antenna)已經在可攜式無線電通訊裝 置中使用-段時間。使用内置天線來連接具有數項優點， 其中之-便係其非常小型且重量輕，從而使得適用於尺寸 與重量非常重要的應用中，例如行動電話。 不過，將内置天線應用在行動電話中卻會對該天線元 件的組態加諸特定的限制條件。明確地說，於一可攜式無 線電通訊裝置中’用於一内置天線排列的空間非常有限。 該些限制條件可能會使其難以尋得一種提供寬操作頻帶的 天線組態。尤其是對於希望配合比較低頻率的無線電訊號 來使用的天線而言，因為此等天線所希的實體長度會大於 配合比較高頻率來操作的天線。 刼作在比較低頻帶中的其中一種應用便係fm無線電 應用。FM頻帶在歐洲係被定義在介於88至ι〇8ΜΗζ之間 的頻率，或者在美國係被定義在介於76至i 1〇MHz之間的 頻率。適配在一可攜式無線電通訊裝置的殼體内的先前技 術習知天線組態（例如迴路天線或是單極天線）在操作上會 200845479 令人不滿意’因為該天線若非在非常寬的頻帶中具有極差 的效能，便係僅在極窄的頻帶中才具有充分的效能。 取而代之的係，一種用於可攜式無線電通訊裝置的習 知FM天線係被設置在連接至該通訊裝置的頭戴式耳機電 線（headset wire)令。此種具有較長電線的組態雖然讓天線 長度同樣足以用在低頻應用中；不過，倘若不允許使用任 何外部天線的話，此種解決方式便明顯地不適用。 ;另-項問題係，倘若將一第二天線(例如一瞻天旬 设置在與該FM天線相同的通訊裝置中的話，此第二天線 便會干擾該FM天線的操作。 【發明内容】 本發明的一目的係提供_插 U 種用於可攜式無線電通訊裝 置中的内置天線裝置，1合. 八3在具有比較低頻率的整個頻帶 (例如FM無線電頻帶）中 、 χ . 刀的效月匕來操作。本發明的 基礎在於瞭解一主動内置 罝大綠可配置成一半迴路天線。 根據本發明，提供一種 種用於可攜式無線電通訊裝置的 天線衣置，其調適成用以200845479 IX. INSTRUCTIONS OF THE INVENTION: FIELD OF THE INVENTION The present invention relates generally to antenna devices, and more particularly to a day-of-the-day device for use in a radio communication device, such as a mobile telephone, adapted to Used for radio signals with very low frequencies, such as radio signals in the band. [Prior Art] An internal antenna has been used for a period of time in a portable radio communication device. The use of an internal antenna for connection has several advantages, among which it is very small and lightweight, making it suitable for applications where size and weight are important, such as mobile phones. However, applying the built-in antenna to a mobile phone imposes specific constraints on the configuration of the antenna element. Specifically, the space for an internal antenna arrangement in a portable radio communication device is very limited. These constraints may make it difficult to find an antenna configuration that provides a wide operating band. Especially for antennas that are intended to be used with relatively low frequency radio signals, the antennas that are preferred by these antennas will be larger than antennas that operate with relatively high frequencies. One of the applications in the lower frequency band is the fm radio application. The FM band is defined in Europe between 88 and ι〇8ΜΗζ, or in the United States at frequencies between 76 and i 1〇MHz. A prior art antenna configuration (such as a loop antenna or a monopole antenna) adapted to fit within the housing of a portable radio communication device is operationally unsatisfactory in operation 200845479 'because the antenna is not very wide The extremely poor performance in the frequency band is sufficient in only a very narrow frequency band. Instead, a conventional FM antenna for a portable radio communication device is provided in a headset wire connection to the communication device. This configuration with longer wires allows the antenna length to be sufficient for low frequency applications as well; however, this solution is clearly not applicable if any external antenna is not allowed. Another problem is that if a second antenna (for example, a telescope is placed in the same communication device as the FM antenna, the second antenna interferes with the operation of the FM antenna. An object of the present invention is to provide a built-in antenna device for use in a portable radio communication device, 1 in 8. 8 in an entire frequency band having a relatively low frequency (for example, an FM radio band), χ. The basis of the present invention is to understand that an active built-in 罝 green can be configured as a half loop antenna. According to the present invention, an antenna device for a portable radio communication device is provided, which is adapted for use. Take
^ _ 牡主夕一弟一钿作頻帶中接收I 線電訊號，該天線裝置包 "、、 μ、、 枯·一第一輪射元件，直句杠一 饋送部分；一接地平面； 抑 八 接至該第一# Α+ -杜， 一放大器級，其會直接被連 電”的垃 饋送部分並且可被連接至-1缘 電汛號的接收器裝置，复 文王無綠 ^ , 一中，該第一輻射元件係一包枯兮 接地平面之一部分的一 、匕括忒 為，該第一輛M I 的一部分。該天線裝置的特徵 ^ 成弟輻射兀件的玆咎W > 亥饋迗部分、該接地平面、以及該 200845479 豢 • 麵 放大器級係被設置在一共同的印刷電路板上，且嗜放大哭 級會與該第一輕射元件的饋送部分共置（c〇_1〇cat=在該2 路板上。 本發明還提供-種含此種天線裝置的可攜式無線電通 訊裝置。 根據本發明的天線裝置會在具有比較低頻率的整個頻 帶（例如FM無線電頻帶）中以充分的效能來操作。經發現， f I!*由使用-半迴路天線，雜訊指數基本上會在整個操作頻 率範圍中平坦化，從而不論增益變異為何均會提供足夠的 訊雜比。 於較佳的實施例中，該第一輻射元件的饋送部分係設 置在或是靠近該印刷電路板的其中一末端處，而該第一輻 射凡件與該饋送部分反向的末端則會接地在或是靠近該印 刷私路板的另一末端處。依此方式，該印刷電路板的面積 會獲得最大的使用率。 I 較佳的係，會提供一電容器，其具有：一第一末端， 其會在該饋送部分的近端處直接連接至該第一輻射元件； 以及一第二末端，其會被連接至該接地平面。此電容器（較 佳的係，其數值為10至4〇pF)會提高該放大器的電晶體所 看見的源極阻值，從而會匹配雜訊並且提高穩定性。另外， 口為4第輪射元件基本上會接地在或是靠近該印刷電路 板的末端處，該處的主天線裝置（例如一 GSM天線）的電場 (E field)非#大，所以，來自此主天線的串訊便會被最小 化0 7 200845479 在依附專利申請項中定義著進一步的較佳實施例。 【實施方式】 在下文中將提出根據本發明的一天線裝置及一可攜式 然線電通訊裝置的較佳實施例的詳細說明。 在下面的說明與申請專利範圍中會使用到術語輻射元 件。應該瞭解的係，該術語希望涵蓋被排列成用以接收及/ 或發射無線電訊號的所有導電元件。 首先參考圖1，圖中所示的係根據本發明的天線装置i 的一般組態。其包括一第一輻射元件丨0，該第一輻射元件 的形式為一由導電材料所製成的非共振器件。該第一輕射 元件係一半迴路天線的一部分，下文將作詳細說明。半迴 路天線所指的係該第一輻射元件係一迴路的一部分，其 中，該迴路包括該接地平面的一部分。因此，該由導電材 料所製成的非共振器件基本上會構成一半迴路且該迴路會 結束於該接地平面。 第 輪射元件具有一饋送部分11，其會直接連接至一 並如1電谷為（shunt capacitor)20，該並聯電容器排列成用以 配合该第一輻射元件產生共振，其會直接連接至一放大器 輸入且會視情況被連接至一 ESD保護電路。該共振頻率響 應係充當該操作頻帶中的訊號的帶通濾波器。於操作在FM 頻f的情況中，導通帶在歐洲係介於88至l〇8MHz之間或 者在美國係介於76至110MHz之間。 该共振頻率響應的功能還會進一步充當一 ESD保護電 200845479 路=路，其會有效地阻隔大部分的ESD脈衝頻譜。該滤波 器還會消拜或至少會減低來自電磁干擾（emi)訊號的干擾 以及可能來自於被設置在相同無線電通訊裝置中的其它天 線裝置（例如操作在該FM天線以上之頻率處的蜂巢式gsm 天線）的訊號。 一放大器級30會排列在該並聯電容器2()後面，用以 放大由該第一輻射元件丨〇接收到的訊號。 被該天線裝置1接收且放大的訊號會供應至一 FM接 收器電路40，該FM接收器電路可以是由飛利浦半導體公 T所製ie的銷售型號為HVQFN40之習知電路。該fm接 收器電路包括一 RF輸入41，其會連接至該放大器3〇。 較佳的係，該並聯電容器20與放大器級3〇會設置在 非常靠近該第一輻射元件丨〇處，以便最小化來自外部訊 唬源的寄生效應與干擾。所以，其設置在該第一輻射元件 1 〇的饋送部分的近端處。 現在將參考圖2來說明在圖1中所表達的一般性概念 的施行方式。 5亥放大器級30包括一場效電晶體（feT)3 1，其閘極係 被連接至該並聯電容器20，源極係直接被連接至接地，而 沒極則可被連接至該FM接收器電路4〇的輸入41。在該 電晶體3 1的汲極及該饋送電壓vdd之間還連接著一負載 電阻器32。 為讓該天線裝置1進行操作，該電晶體較佳的係在操 作頻帶中具有低於1 dB的最小雜訊指數以及高於1 5dB的 9 200845479 增盈。另外’較佳的係，該電晶體還 雜訊阻值Rn，以便針 〃、’、於1 〇歐姆的 十任思的天線組態均能達 ^ 的訊號接收品質。爷-B _ & 違到取尚可能 貝 4電晶體的進一步較佳牯料在认 非常低，較佳的係小於1 v 寺徵係輸入電容 、；3PF，以便取得很高的輸入阻浐。 應該明白的传，太 抗。 -本文所述的天線裝置係一主動穿w。 本文所述的組態較佳的係 " 你θ对4弟一輻射元件直接 大器級共同設計。 卞且接14 δ亥放 =將參考圖3來說明本發明_之第二實施例形式 的一 *曰代施行方式。和上面所述之第一實施例相同，此天 線裝置包括—具有—饋送部分U的第-輻射元件10、一 並聯電容、以及放大器、級3〇。不過，於此第二實施例中， 該並聯電容係可調整的’也就是，其設計成所謂的變電容 器（VaraCt〇r)120,用以提供一可控制的天線裝置。再者， 該放大器級係一所謂的疊接放大器（encode amplifier )130。此疊接放大器包括一場效電晶體i3i，其 閘極係被連接至該第一輻射元件與該並聯電容，源極係直 接被連接至接地，而汲極則係被連接至一第二場效電晶體 Π3的源極。第二場效電晶體133的閘極係透過一電容器 134被連接至接地。第二場效電晶體133的汲極則可連接 至該FM接收器電路40的輸入41。在該第二電晶體133 的汲極及該饋送電壓Vdd之間還連接一負載電阻器132。 於此第二實施例中，一 FM發射器電路140會透過一 切換器141連接至該第一輻射元件。倘若該發射器電路的 輸入阻抗Ζτχ非常低的話（例如低於接收器電路40前面的 200845479 放大益30的輸人阻抗Ζτχ十倍），便必須制此切換器。 然而’偏若該發射器電路的輸入阻抗Ζτχ和放大器3〇的輸 入阻抗ΖΤΧ具有相同的大小等級的話，便可以省略此切換 器 141 〇 ' 错由提供連接至該第—㈣元件1G的發射器電路，此 ‘射70件可以被共用’並且因而兼具發射與接收的功能。 該發射器電路較佳的係應該在約略饋送㈣η處被連接 至該第一輻射元件。 現在將參考圖4與5來說明根據本發明的一天線装置 的第‘射το件的-般佈局。—印刷電路板（pcB)3i〇會被 〇且地排列在可攜式無線電通訊裝置（此等圖式中並未顯 示）中。一接地平面312會被設置在該PCB上。一對應於 面所述之放大态3〇、13〇的訊號負載會被設置在此 上’此PCB較佳的係-多@ PCB。該第一輻射元件10(其 車乂仏的係細長形且可能係一電線形狀的電導體）會在該饋送 部分11處（較佳的係、，在該PCB的其中一末端處或是靠近 孩PCB的其中一末端）直接被連接至該放大器。所以，該 放大裔及該饋送部分會被共同放置在此末端處。因此，該 第一輻射兀件的該饋送部分、該接地平面、以及該放大器 級會被設置在-共同的PCB i。該導體的大部分長度基本 上係平打於該PCB 310並且位在與該PCB 310相隔距離h 处"亥^體1 0中與被連接至該訊號源的末端反向的末端 會被連接至設置在該PCB 31〇上的接地平面312，其係位 於该PCB的反向末端處或是靠近該pCB的反向末端。這 11 200845479 • 意謂著該第—輻射元件（其構成一半迴路）盡可能地善用許 多空間，因為該迴路的面積對天線的效能非常重要。 一電容器20會被設置在該第一輻射元件接地之間，非 常靠近該镇送部& u，m，其係被設置在該饋送部分 11的近端處。該電容器20具有：一第一末端，其會在： 饋迗部分11的近端處被直接連接至該第一輻射元件；以 及一第二末端，其會被連接至接地。此電容器（較佳的係， 其數值為10至40PF)會提高該放大器的電晶體所看見的源 極阻值’從而會匹配雜訊並且提高穩定性。 於一替代實施例中，該導體10會被設置成一個以上的 圈數，在圖5中所示的範例中便為兩個圈數。該第一半迴 路的$體會牙過该PCB中的一孔洞314並且通往其下方 側。在下方側中，該導體會沿著該pcB從該pCB的其中 一個末端繞行至另一末端，較佳的係具有微帶線丨〇a的形 式。該導體會在該處穿過該PCB中的一第二孔洞316並且 通往其上方側，其會沿著位在與其相隔一距離處的該pCB， 並且最後會被接地在該PCB的第二末端處。依此方式，該 輻射阻值便會提高（其會與迴路圈數的平方成正比），從而 改良該天線的效能。 該迴路内部的一鐵氧體（ferrite)，圖中以元件符號1 4 來表示，可配合圖4的實施例及圖5的實施例兩者來使用， 用以改良該天線裝置的效能。 現在將參考圖6來說明上面參考圖1至3所述之根據 本發明的天線裝置的第一較佳位置，圖中縿製著一可攜式 12 200845479 無線電通訊裝置（例如一行動電話）之殼體3〇〇的一般外 形。圖中所示的殼體為部分切面圖，俾使不會阻礙該天線 裝置的位置，該天線裝置可能係參考圖丨至3所述的任何 裝置。 PCB 310會被設置在該殼體之中，其具有在習知技術 中會於一行動電話中發現的電路（圖中並未顯示）。在該pcB 上還安置著該FM接收器電路4〇。在該殼體的上方部份中 設置著一第二天線輻射元件320，用以接收且發射一蜂巢 式行動電話系統（例如一 GSM系統）的RF訊號。此第二輻 射元件320係被設置在該電路板中和該第一輻射天線元件 的館送部分相同的一側上。 一電池封裝（圖中並未顯示）同樣會被設置成面向該殼 體300的背部。 該第一輻射元件1〇較佳的係會被放置成使其會在該 PCB中與設置著該第二輻射元件32〇之末端反向的末端處 被連接至該FM電路。接著，該第一輻射元件會沿著該pcB 的長邊繞行，直到其抵達該PCB的另一末端為止，其會在 該處被接地至設置在該PCB 310上的接地平面312。 為讓該天線裝置比較不會受到配向的影響，該第一輕 射元件10可能會被設置成在其被接地至設置在該PCB上 的接地平面3 12之前同樣也會沿著該pcB的短邊繞行。 雖然本文已經說明過根據本發明的天線裝置的較佳實 加例，然而，熟習本技術的人士便會瞭解可以在隨附申請 專利範圍的範疇内對該些較佳實施例進行改變，其並不會 13 200845479 脫離本發明的概念。 應該瞭解的係，可以在隨附申請專 嘴内對根據本發明的天線裝置的形狀與2圍二定義的範 二可以改贈的天線組態俾使其對應於通: 爰置的形狀、所希效能、·等。 雖然上面所述之根據本發明的一天線裝 ^ ^ 被描述為調適成用以接收FM頻帶中 、Λ ^例係 步m…之無線電訊號的天線 衣置…’其同樣可使用於其它應用，例如用在介於約 =至_MHz之間的頻率範圍中的數位视訊廣播⑽嗔 雖然本文已經參考-可攜式無線電通訊裝置的天線穿 置在-行動電話中的用法來說明該天線裝置；不過，岸該 二=置：：明的概念同樣可套用至其它的可攜式無線 书通机衣置以及主要係針對固定使用的可攜式裝置。其範 例可能有小型時鐘(例如旅行鬧鐘)、τν接收器、或是遊^ 機。根據本發明的天線裝置的又一種可能應用係應用在= 人數位助理（PDA)、ΜΡ3與CD播放器、⑽無線電接收器、 以及膝上型電腦。進一步的應用則係應用在車内。因此， 應該廣義地看待可攜式無線電通訊裝置一詞。 上面參考圖6與7所述的實施例包含一 gsm天線。 應該明白的係，只要其操作頻率高於下頻帶的操作頻率， 可以一不同的天線來取代。亦可省略一第二天線。 本文中雖然將一 FET描述為較佳的電晶體類型；不過， 應該瞭解的係’亦可以使用其它類型的電晶體，例如異質 200845479 接面雙極電晶體（HBT)。 應該明白的係，該Τχ部件亦可被設計在圖2中所示 的第一實施例中。同樣應該明白的係，第一實施例的電容 器20亦可由一變電容器來取代。 【圖式簡單說明】 . 耵面已經藉由範例，參考隨附的圖式說明過本發明， 其中： Χ 圖1所*的係被連接至—FM接收器電路之根據本發 明的一天線裝置的概略示意圖； 圖2所示的係根據本發明的一天線裝置的第一實施例 的更詳細圖式； 、 圖3所示的係根據本發明的一天線裝置的第二實施 的更詳細圖式； 、 一圖4所示的係根據本發明的一天線裝置的一第一輻射 元件組態的概略示意圖； 田、 一圖5所示的係根據本發明的一天線裝置的一多圈數第 一輻射元件組態的概略示意圖；^ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Eight connected to the first # Α + - Du, an amplifier stage, which will be directly connected to the "feed" part and can be connected to the -1 edge electric 的 number of receiver device, Fu Wen Wang no green ^, one The first radiating element is a portion of a portion of the ground plane of the package, and is a part of the first MI. The characteristics of the antenna device are 成W > The feed portion, the ground plane, and the 200845479 面 surface amplifier stage are disposed on a common printed circuit board, and the amplification peak is co-located with the feed portion of the first light-emitting element (c〇_ 1 〇 cat = on the 2-way board. The present invention also provides a portable radio communication device including such an antenna device. The antenna device according to the present invention will have an entire frequency band having a relatively low frequency (for example, an FM radio band) ) operated with sufficient performance. f I!* By using a half-loop antenna, the noise index will essentially flatten over the entire operating frequency range, providing sufficient signal-to-noise ratio regardless of gain variation. In a preferred embodiment, the a feeding portion of a radiating element is disposed at or near one end of the printed circuit board, and an end of the first radiating member opposite to the feeding portion is grounded at or near the printed private circuit board In the other end, the area of the printed circuit board will be maximized. I prefer to provide a capacitor having a first end that will be at the proximal end of the feed portion. Directly connected to the first radiating element; and a second end that is connected to the ground plane. The capacitor (preferably, the value is 10 to 4 〇pF) increases the transistor of the amplifier The source resistance is seen to match the noise and improve stability. In addition, the 4th wheel element is substantially grounded at or near the end of the printed circuit board where the main antenna device (eg The electric field (E field) of the GSM antenna is not large, so the crosstalk from the main antenna is minimized. 0 7 200845479 A further preferred embodiment is defined in the attached patent application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A detailed description of a preferred embodiment of an antenna device and a portable electrical communication device in accordance with the present invention will be provided. The term radiating element will be used in the following description and claims. The term is intended to encompass all conductive elements that are arranged to receive and/or transmit radio signals. Referring first to Figure 1, there is shown a general configuration of an antenna device i according to the present invention, which includes a first radiation Element 丨0, the first radiating element is in the form of a non-resonant device made of a conductive material. The first light-emitting element is part of a half-loop antenna, as will be described in more detail below. The half-loop antenna refers to the first radiating element being part of a loop, wherein the loop includes a portion of the ground plane. Therefore, the non-resonant device made of the conductive material basically constitutes a half circuit and the circuit ends in the ground plane. The first projecting element has a feed portion 11 which is directly connected to a shunt capacitor 20 which is arranged to cooperate with the first radiating element to generate a resonance which is directly connected to a The amplifier inputs and is connected to an ESD protection circuit as appropriate. The resonant frequency response is a bandpass filter that acts as a signal in the operating band. In the case of operation in the FM frequency f, the conduction band is between 88 and 10 MHz in Europe or between 76 and 110 MHz in the United States. The function of this resonant frequency response will further act as an ESD protection circuit, which will effectively block most of the ESD pulse spectrum. The filter also annihilates or at least reduces interference from electromagnetic interference (emi) signals and may come from other antenna devices (eg, operating at frequencies above the FM antenna) that are disposed in the same radio communication device Gsm antenna) signal. An amplifier stage 30 is arranged behind the shunt capacitor 2() for amplifying the signal received by the first radiating element 丨〇. The signal received and amplified by the antenna device 1 is supplied to a FM receiver circuit 40, which may be a conventional circuit of the model number HVQFN40 manufactured by Philips Semiconductors. The fm receiver circuit includes an RF input 41 that is coupled to the amplifier 3. Preferably, the shunt capacitor 20 and the amplifier stage 3 are disposed very close to the first radiating element , to minimize parasitic effects and interference from external sources. Therefore, it is disposed at the proximal end of the feeding portion of the first radiating element 1 〇. The manner in which the general concept expressed in Fig. 1 is implemented will now be described with reference to Fig. 2. The 5th amplifier stage 30 includes a potent transistor (feT) 3 1, the gate of which is connected to the shunt capacitor 20, the source is directly connected to ground, and the pole is connected to the FM receiver circuit 4〇 input 41. A load resistor 32 is also connected between the drain of the transistor 31 and the feed voltage vdd. For operation of the antenna device 1, the transistor preferably has a minimum noise index of less than 1 dB in the operating band and a 9 200845479 gain of more than 15 dB. In addition, the transistor is also provided with a noise resistance value Rn so that the antenna configuration of the pin 〃, ', and 1 〇 ohms can achieve the signal reception quality of ^.爷-B _ & </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> <RTIgt; . It should be understood that it is too resistant. - The antenna device described herein is actively wound. The configuration described in this article is better. You θ are designed together with the 4th and 1st radiating components. 14 接 14 δ 放 = = 第二 参考 参考 参考 参考 参考 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 As with the first embodiment described above, the antenna device includes a first radiating element 10 having a feeding portion U, a parallel capacitor, and an amplifier, stage 3A. However, in this second embodiment, the shunt capacitance is adjustable', i.e., it is designed as a so-called variable capacitance device (VaraCt〇r) 120 for providing a controllable antenna device. Furthermore, the amplifier stage is a so-called encode amplifier 130. The spliced amplifier includes a field effect transistor i3i whose gate is connected to the first radiating element and the shunt capacitor, the source is directly connected to the ground, and the drain is connected to a second field effect The source of the transistor Π3. The gate of the second field effect transistor 133 is connected to ground through a capacitor 134. The drain of the second field effect transistor 133 can be coupled to the input 41 of the FM receiver circuit 40. A load resistor 132 is further connected between the drain of the second transistor 133 and the feed voltage Vdd. In this second embodiment, an FM transmitter circuit 140 is coupled to the first radiating element via a switch 141. If the input impedance Ζτχ of the transmitter circuit is very low (e.g., 10 times lower than the input impedance Ζτχ of the 200845479 amplification benefit 30 in front of the receiver circuit 40), the switch must be made. However, if the input impedance Ζτχ of the transmitter circuit and the input impedance 放大器 of the amplifier 3〇 have the same size level, the switch 141 can be omitted to provide a transmitter connected to the first (4) element 1G. The circuit, this '70 shots can be shared' and thus has both the function of transmitting and receiving. Preferably, the transmitter circuit should be connected to the first radiating element at approximately the feed (four) η. The general layout of the "those" of an antenna device according to the present invention will now be described with reference to Figs. - The printed circuit board (pcB) 3i will be arranged in a portable radio communication device (not shown in these figures). A ground plane 312 will be placed on the PCB. A signal load corresponding to the amplified state 3〇, 13〇 described above will be set here. This PCB is better than the multi-PCB. The first radiating element 10 (the ferrule of which is elongated and possibly a wire-shaped electrical conductor) may be at the feeding portion 11 (preferably, at or near one end of the PCB) One of the ends of the child PCB is directly connected to the amplifier. Therefore, the magnified person and the feeding portion are placed together at the end. Therefore, the feed portion of the first radiating element, the ground plane, and the amplifier stage are disposed on a common PCB i. The majority of the length of the conductor is substantially flush with the PCB 310 and is located at a distance h from the PCB 310. The end of the body opposite the end connected to the signal source is connected to A ground plane 312 is disposed on the PCB 31A at the opposite end of the PCB or near the opposite end of the pCB. This 11 200845479 • means that the first radiating element (which forms a half loop) uses as much space as possible because the area of the loop is very important to the performance of the antenna. A capacitor 20 is disposed between the ground of the first radiating element, very close to the ballast portion & u, m, which is disposed at the proximal end of the feed portion 11. The capacitor 20 has a first end that is directly connected to the first radiating element at a proximal end of the feed portion 11 and a second end that is connected to ground. This capacitor (preferably, having a value of 10 to 40 PF) will increase the source resistance seen by the transistor's transistor and will match the noise and improve stability. In an alternate embodiment, the conductor 10 will be arranged in more than one turn, which is two turns in the example shown in Figure 5. The $1 of the first half of the path passes through a hole 314 in the PCB and leads to the underside. In the lower side, the conductor will travel from one end of the pCB to the other along the pcB, preferably in the form of a microstrip line 丨〇a. The conductor will pass therethrough through a second aperture 316 in the PCB and to its upper side, which will follow the pCB at a distance from it and will eventually be grounded at the second of the PCB. At the end. In this way, the radiation resistance is increased (which is proportional to the square of the number of loop turns), thereby improving the performance of the antenna. A ferrite inside the circuit, indicated by the symbol 14 in the figure, can be used in conjunction with the embodiment of FIG. 4 and the embodiment of FIG. 5 to improve the performance of the antenna device. A first preferred position of the antenna device according to the present invention as described above with reference to FIGS. 1 to 3 will now be described with reference to FIG. 6, in which a portable 12 200845479 radio communication device (eg, a mobile phone) is fabricated. The general shape of the housing 3〇〇. The housing shown in the figures is a partial cutaway view so as not to obstruct the position of the antenna device, which may be referred to any of the devices described in Figures 3 to 3. The PCB 310 will be placed in the housing with circuitry (not shown) that would be found in a mobile phone in the prior art. The FM receiver circuit 4 is also placed on the pcB. A second antenna radiating element 320 is disposed in the upper portion of the housing for receiving and transmitting an RF signal from a cellular telephone system (e.g., a GSM system). The second radiating element 320 is disposed on the same side of the circuit board as the gallery portion of the first radiating antenna element. A battery pack (not shown) will also be placed facing the back of the housing 300. Preferably, the first radiating element 1 is placed such that it is connected to the FM circuit at the end of the PCB opposite the end where the second radiating element 32 is disposed. Next, the first radiating element will follow the long side of the pcB until it reaches the other end of the PCB where it will be grounded to the ground plane 312 disposed on the PCB 310. In order for the antenna device to be relatively unaffected by the alignment, the first light-emitting element 10 may be arranged to also be short along the pcB before it is grounded to the ground plane 3 12 disposed on the PCB. Wrap around. Although a preferred embodiment of the antenna device in accordance with the present invention has been described herein, it will be apparent to those skilled in the art that the preferred embodiments can be modified within the scope of the appended claims. Will not be 13 200845479 out of the concept of the invention. It should be understood that the antenna configuration according to the shape of the antenna device according to the present invention and the definition of the two antennas can be modified in the accompanying application, so that it can correspond to the shape of the antenna: Xi performance, etc. Although an antenna device according to the present invention as described above is described as an antenna device adapted to receive radio signals in the FM band, such as step m... can also be used for other applications, such as Digital video broadcasting (10) for use in a frequency range between about = to _MHz, although the antenna device has been described herein with reference to the use of an antenna of a portable radio communication device in a mobile phone; However, the concept of the second = set:: Ming can also be applied to other portable wireless book machine clothing and mainly for fixed-use portable devices. Examples of this may be small clocks (such as travel alarm clocks), τν receivers, or cruisers. Yet another possible application of the antenna device according to the present invention is applied to = Number of Position Assistants (PDAs), ΜΡ3 and CD players, (10) radio receivers, and laptops. Further applications are applied in the car. Therefore, the term portable radio communication device should be viewed in a broad sense. The embodiment described above with reference to Figures 6 and 7 includes a gsm antenna. It should be understood that as long as the operating frequency is higher than the operating frequency of the lower band, it can be replaced by a different antenna. A second antenna can also be omitted. Although a FET is described herein as a preferred transistor type; however, other types of transistors may be used, such as a heterogeneous 200845479 junction bipolar transistor (HBT). It should be understood that the jaw member can also be designed in the first embodiment shown in FIG. It should also be understood that the capacitor 20 of the first embodiment can also be replaced by a variable capacitor. BRIEF DESCRIPTION OF THE DRAWINGS The present invention has been described by way of example with reference to the accompanying drawings, wherein: FIG. 1 is an antenna device according to the present invention connected to an FM receiver circuit. 2 is a more detailed view of a first embodiment of an antenna device according to the present invention; and FIG. 3 is a more detailed view of a second embodiment of an antenna device according to the present invention. FIG. 4 is a schematic diagram showing a configuration of a first radiating element of an antenna device according to the present invention; and FIG. 5 is a multi-turn of an antenna device according to the present invention. A schematic diagram of the configuration of the first radiating element;
圖6所不的係安置在一可攜式無線電通訊裝置中 據本發明白勺一天線裝置的透視部分切面目；以及 X 圖7戶斤示的係安置在一可攜式無線電通訊裝χ 豕本發明㈣一替代天線裝置的透視部分切面目。 < 【主要元件符號說明】 15 200845479 1 天線裝置 10 輻射元件 10a 微帶線 11 饋送部分 14 鐵氧體 20 並聯電容器 30 放大級 31 場效電晶體 32 負載電阻器 40 FM接收器電路 41 Vdd 101 120 130 131 132 133 134 140 141 300 RF輸入 饋送電壓 (未定義） 變電容器 疊接放大器 場效電晶體 負載電阻器 場效電晶體 電容器 FM發射器電路 切換器 可攜式無線電通訊裝置殼體 310 印刷電路板 312 接地平面 16 200845479 314 孔洞 316 孔洞 320 輻射元件6 is a perspective view of an antenna device according to the present invention disposed in a portable radio communication device; and X is shown in a portable radio communication device. The invention (4) is a perspective sectional view of an alternative antenna device. < [Description of main component symbols] 15 200845479 1 Antenna device 10 Radiation element 10a Microstrip line 11 Feeding portion 14 Ferrite 20 Parallel capacitor 30 Amplifier stage 31 Field effect transistor 32 Load resistor 40 FM receiver circuit 41 Vdd 101 120 130 131 132 133 134 140 141 300 RF input feed voltage (undefined) Variable capacitor cascading amplifier field effect transistor load resistor field effect transistor capacitor FM transmitter circuit switcher portable radio communication device housing 310 printing Circuit Board 312 Ground Plane 16 200845479 314 Hole 316 Hole 320 Radiating Element
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