1275200 玖、發明說明： 技術領域 本發明係關於無線電通信終端機的天線，及具體而言係 關於結合可攜式終端機的低輪廓天線，及該天線能在不同 電信頻率頻帶操作。 先前技術 自20世紀末世界行動電話工業己有重大發展。從最初的 類比系統，如AMPS(最新行動電話系統）及NMT(北歐行動電 話）標準，而最近數年中的發展幾乎完全集中在用於蜂巢式 無線電網路系統的數位方法的標準，如D_AMps(如， EIA/TIA-IS-54-B及IS-136)及GSM(行動通信全球系統）。不 同系統使用不同的數位傳輸系統，如分時多向近接（TDMA) 或分碼多向近接（CDMA)。目前，蜂巢式技術已進入上述所 渭第j代數位系統，具有許多優於先前第2代的優點。其中 包括一增加頻帶寬度容許更複雜資料達到有效通信。第3代 的仃動系統在歐洲稱為UMTS(世界移動電話系統）及在美國 稱為CDMA2000，及在日本已發展到相當程度。另外，大家 ^使用能在家中、辨公室、街道、汽車等㈣接收或播 發電話的可攜式低成本，口袋型無電纜電話的第一代的個 人m k網路（PCN)將由使用下一代數位蜂巢式系統結構的 蜂巢式載體構成。 秦巢式通偽服務的一項發展關係採用額外頻率頻帶用於 處理行動通信，如用於個人通信服務（pcs)。以美國為例， 巢式超頻帶歹成兩頻率頻帶（一般稱頻率頻帶A及頻率頻 84571 1275200 帶B)用於載運及控制800 MHZ範圍内的通信。另一方面，美 國規定PC S超頻帶包括1 9 0 0 ΜΗZ範圍中6個不同頻率頻帶 (A、B、C、D、E及F)。如此，美國的任何已知區域現在都 有8個頻率頻帶用於通信服務。一些標準己獲准用於pCs超 頻帶（如，PCS 1 900 (J-STD-007))，而其他己獲准用於蜂巢式 超頻帶（如，D-AMPS (IS 136))。其他供裝置操作的頻率頻 帶包括GPS (在1.5 GHz範圍内操作）及UMTS (在2.0 GHz範圍 内操作）。蜂巢式及PCS超頻帶規定的各頻率頻帶分配複數 個交通通遒及至少一近接或控制通遒。控制通道係用於利 用發射至及接收自行動台的資訊控制或監視行動台的操作 。遠種/貝訊包括進來電話訊號，出去電話訊號、呼叫訊號 、呼叫回應釩號、位置登記訊號、聲音通道分配、保養說 明、傳遞及單元選擇或重選說明如一行動台移出一單元的 典線電範圍及進入另外單元的無線電範圍。控制及聲音通 道可使用類比調變或數位調變。 在下趋由一基地台發射的訊號經交通及控制通道由行動 或可攜’式終端機接收，各具有至少一天線。向來，可攜式 終端機應用各種不同形式的天線以接收及發射經空氣介面 的訊號。例如’垂直固定在一傳導表面上的單極天線已經 證明具有良好幅射特性，滿意的驅動點阻抗及相當簡單的 構以。單紅天線可製成各種物理形狀。例如，通常用於可 n式％」而機的干或鞭天線。高頻率應用的天線長度必須減 、 卜的、擇則為螺旋式天線。另外，行動終端機製造 商接獲到的泰、+、 而5為小之又小的終端機。這種迷你化需求結 84571 1275200 合額外功能的希望如具有在不同頻率頻帶及不同蜂巢式系 統使用的能力。 ‘ 市場上較有希望供應的可攜式終端機為能在廣泛的不同 頻率頻▼操作’如 8〇〇 MHz、9〇〇 MHz、15〇〇 mHz、1 800 MHz 一 MHz 2·0 GHz及2.45 GHz的範圍。因此，可攜式終 端機需要使用能提供複數個頻率頻帶充分增益及頻帶寬度 的天 '、泉。己經完成多種嘗試以製成該種天線。為了減少可 “式、、、；而機的尺寸，過去數年中已經完成内裝式天線。今 天普遍的希望是具有一種顧客看不見的天線。+天已使用 不5 d式的^片’具有或沒有寄生元件。目前行動電話最 通用的内取式天線包括所謂平面反F天線(piFA)。這名稱已 被私用因為事貫上孩種天線看來像字母F傾斜卯度的形狀 1種天線需要-輸人點及—接地連接。如果附近包括有 一或數個寄生^件，便可接地或介電隔離接地。 乂未來行動終端機的趨勢為繼續減少尺寸及重量，及強烈 市^内t型迷你天線用於3⑽MHz」_ MHz頻率範圍内的 可攜式勢端機。現有用於行動電話的内裝式天線包括微帶 天線及上述的PIFA。微帶天線為低輪摩、小尺寸及重量輕 。舰已經料行動電話手機及為—種最被看好的設計， 如1994/2出版1EE學報，「個人通信系統的微«波器及天 泉」 W6頁，K. QaSSlm建議的「可攜式手機的反F天 線」。不㉚，由於行動電話變為小之又小，傳統微帶貼片 及職天線錢太大而不能配合小的電話機座。如果新-弋“而要夕言天線用於蜂巢式、無線區域網路、gps及其 84571 1275200 他’這便成為特別的問題。 ·1275200 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna for a radio communication terminal, and more particularly to a low profile antenna incorporating a portable terminal, and the antenna can operate in different telecommunication frequency bands. Prior Art The world's mobile phone industry has seen significant growth since the end of the 20th century. From the original analog systems, such as the AMPS (Latest Mobile Phone System) and NMT (Nordic Mobile Phone) standards, the developments in recent years have focused almost exclusively on the standards of digital methods for cellular radio network systems, such as D_AMps. (eg, EIA/TIA-IS-54-B and IS-136) and GSM (Global System for Mobile Communications). Different systems use different digital transmission systems, such as time-sharing multi-directional proximity (TDMA) or code division multi-directional proximity (CDMA). At present, cellular technology has entered the above-mentioned J-th generation digital system, and has many advantages over the previous second generation. This includes an increase in the bandwidth to allow for more complex data to achieve effective communication. The third generation of the turbulence system is called UMTS (World Mobile Phone System) in Europe and CDMA2000 in the United States, and has developed to a considerable extent in Japan. In addition, everyone can use the portable, low-cost, pocket-type cableless telephones that can receive or broadcast calls at home, in the office, on the street, in the car, etc. The first generation of personal mk network (PCN) will be used by the next generation. The honeycomb carrier of the digital honeycomb system structure is constructed. A developmental relationship between the Qinchao-type pseudo-pseudo-services uses additional frequency bands for handling mobile communications, such as for personal communication services (PCs). In the United States, for example, the nested hyperband is divided into two frequency bands (generally called frequency band A and frequency band 84571 1275200 with B) for carrying and controlling communications in the 800 MHz range. On the other hand, the US regulations for the PC S hyperband include six different frequency bands (A, B, C, D, E, and F) in the 1 9000 ΜΗZ range. As such, any known area in the United States now has eight frequency bands for communication services. Some standards have been approved for use in the pCs hyperband (eg, PCS 1 900 (J-STD-007)), while others have been approved for use in cellular hyperbands (eg, D-AMPS (IS 136)). Other frequency bands for device operation include GPS (operating in the 1.5 GHz range) and UMTS (operating in the 2.0 GHz range). The frequency bands specified in the cellular and PCS hyperbands are assigned a plurality of traffic passes and at least one proximity or control port. The control channel is used to control or monitor the operation of the mobile station using information transmitted to and received from the mobile station. Far-type / Beixun includes incoming telephone signals, outgoing telephone signals, call signals, call response vanadium numbers, location registration signals, sound channel assignments, maintenance instructions, delivery and unit selection or re-election instructions such as a mobile station moving out of a unit Electrical range and radio range into another unit. Analog and digital channels can be used for control and sound channels. The signals transmitted by a base station are received by the mobile or portable terminal via traffic and control channels, each having at least one antenna. In the past, portable terminals have used various forms of antennas to receive and transmit air interface signals. For example, a monopole antenna that is vertically fixed to a conductive surface has been shown to have good radiation characteristics, satisfactory drive point impedance, and a relatively simple configuration. The single red antenna can be made into various physical shapes. For example, it is usually used for dry or whip antennas that can be used. The antenna length for high frequency applications must be reduced, and the choice is a helical antenna. In addition, the mobile terminal manufacturers received the Thai, +, and 5 small and small terminals. This mini-requirement knot 84571 1275200 combines the need for additional features such as the ability to use in different frequency bands and different cellular systems. 'The more promising portable terminals on the market are capable of operating at a wide range of different frequencies, such as 8 〇〇 MHz, 9 〇〇 MHz, 15 〇〇 mHz, 1 800 MHz, 1 MHz 2·0 GHz and 2.45 GHz range. Therefore, the portable terminal needs to use a sky that can provide sufficient gain and bandwidth of a plurality of frequency bands. A variety of attempts have been made to make such antennas. In order to reduce the size of the machine, the built-in antenna has been completed in the past few years. Today's general hope is to have an antenna that customers can't see. +Day has used a 5D type of film. With or without parasitic components. The most common internal antenna for mobile phones today is the so-called Planar Inverse F Antenna (piFA). This name has been used privately because of the shape of the child's antenna that looks like the letter F. Antennas need to be connected to the ground and grounded. If there are one or several parasitic components nearby, they can be grounded or dielectrically isolated. 乂 The trend of future mobile terminals is to continue to reduce size and weight, and strong city ^ The internal t-type mini antenna is used for portable potentials in the 3 (10) MHz"_ MHz frequency range. Existing built-in antennas for mobile phones include microstrip antennas and the aforementioned PIFAs. The microstrip antenna is low wheel, small size and light weight. The ship has been expected to be the most popular design for mobile phones and mobile phones. For example, the 1EE Journal of 1994/2, "Micro-waves and Tianquan of Personal Communication Systems", page W6, K. QaSSlm recommended "Portable Mobile Phones" Anti-F antenna". No. 30, because the mobile phone becomes small and small, the traditional microstrip patch and the antenna are too big to match the small telephone stand. If the new-弋 "and the antenna is used for cellular, wireless local area network, gps and its 84571 1275200 he" this becomes a special problem.
Lai、Kln、Yue、AU)ert等人發表一曲折反f天線於w〇 96/272 ! 9 ’利㈣種天線可能減少天線尺寸達到傳統PIFA 天線的40%。在許多應用巾，需要多重頻帶性能。為了製成 多重頻帶内裝式天線，Ying設計一種印刷雙螺旋雙頻帶天 線於美國專利菜第6，1 6 6，6 9 4號揭露。該專利包括一雙頻帶 内裝式天線具有兩個在不同頻率共振的帶線零件。在該設 計中，天線的頻帶寬度較小因為使用薄帶線作為發射器。 所以也設計一種補償方法，即是，一電阻器負載插入匹配 橋，損失一些增益以提供較寬的頻帶寬度。Lai, Kln, Yue, AU) ert et al. published a twisted-f antenna on the w〇 96/272 ! 9 ‘Lee (four) antennas may reduce the antenna size to 40% of the traditional PIFA antenna. In many applications, multiple band performance is required. In order to make a multi-band built-in antenna, Ying designed a printed double-spiral dual-band antenna as disclosed in U.S. Patent No. 6,166,609. The patent includes a dual band built-in antenna with two stripped parts that resonate at different frequencies. In this design, the bandwidth of the antenna is small because a thin strip line is used as the emitter. Therefore, a compensation method is also designed in which a resistor load is inserted into the matching bridge, and some gain is lost to provide a wider bandwidth.
Ying於WO 00/36700揭露一種進一步改良的雙頻帶貼片 天線。该天線使用美國專利6,166,694的印刷雙螺旋天線的 相同概念，遠天線具有在兩頻率範圍操作的兩部份。取代 使用+ V ’使用具有切口的貼片，使用切口貼片作為發射 器，因而能提供較寬的頻帶寬度。A further improved dual band patch antenna is disclosed by Ying in WO 00/36700. The antenna uses the same concept of a printed double helix antenna of U.S. Patent No. 6,166,694, which has two parts operating in two frequency ranges. Instead of using a patch with a slit using +V', a slit patch is used as the emitter, thus providing a wider bandwidth.
用於二重頻帶應用，上頻帶需要的頻帶從丨7丨〇 MHz至 1 990 MHz。WO 00/36700的方法不能符合本要求。Ying於 WO 01Π 7063設計一種半内裝式多重頻帶印刷貼片天線。該 設計需要較大的表面積以達成三重頻帶天線QFor dual-band applications, the upper band requires a frequency band from 丨7丨〇 MHz to 1 990 MHz. The method of WO 00/36700 does not comply with this requirement. Ying designed a semi-integrated multi-band printed patch antenna at WO 01Π 7063. This design requires a large surface area to achieve a triple-band antenna Q
Ying於W〇01/9 1233設計一種小型多重頻帶分支印刷天 線。該天線使用一寄生金屬元件能涵蓋三重頻帶。 為了在具有不同頻率頻帶的兩電信系統中能具有雙頻帶 性能，必須能在4個不同頻帶操作。其中一例為在美國及歐 洲涵蓋4頻帶的—GSM應用：美國GSM800 (824 MHz-894 MHz) 84571 1275200 ’歐洲 GSM900 (880 MHz-960 MHz)，歐洲 GSM1800 (1710 MHz-1 880 MHz)及美國 GSM 1 900 (1 850 MHz-1 990 MHz)。結‘ 果，需要4個通信終端機及天線，所以能作4重頻帶操作。 發明内交 因此，本發明的一目標為克服先前技術相關的缺點。較 具體言之，一個目標為提供一天線用於無線電通信，該天 線能在不同雙頻帶無線電通信系統中操作，其中不同通信 系統用不同的雙頻帶頻率。 根據第一特徵，達成本目標須藉由一無電通信終端機使 用一種可調式無線電天線裝置，該天線裝置包括一接地基 板、一天線元件及一接地桿連接天線元件至接地基板，其 中一阻抗開關裝置能操作以改變天線元件及接地基板之間 連接的阻抗用於調整天線元件達不同共振頻率。 在—具體實施例中，阻抗開關裝置包括一 MEMS開關。 較里心’ 3亥天線元件包括一第一長型邵件，及一第二長 型4件比該第一長型部件較短，其中該阻抗開關可操作以 在第一.阻抗設定值之間切換，其中該部件共分別在一第一 車父低及一第一較高頻率頻帶共振，及一第二阻抗設定值，其 中邊部件分別在—第二較低及一第二較高頻率頻帶共振。 ju 、 —具體實施例中該阻抗開關裝置包括一第一可操作開 關以改變第一部件及接地基板之間第一連接的阻抗，及一 弟一可操作開關以改變第二部件及接地基板之間第二連接 白勺ppf 〇二方々/Γ 孩弟一開關的裝置較理想用於第一連接可選擇性 ' ^ 阻每於該第一阻抗設定值或一第二阻抗於該第 84571 1275200 二阻抗設定值，及該第二開關的裝置相對用於該第二連接 可選擇性設定一第三阻抗於該第一阻抗設定值或一第四阻 抗於該第二阻抗設定值。 在一具體實施例中該天線元件為分支天線，其中該第一 部件為天線元件的第一分支，及該第二部件為天線元件的 第二分支，各分支具有一第一及一第二末端，其中該分支 連接該第一末端的接地桿。該第一開關的裝置較理想連接 該第一分支的第二末端至接地經該第一或第二阻抗，及第 二開關的裝置較理想連接該第二分支的第二末端至接地經 該第三或第四阻抗。較理想，該阻抗開關裝置包括一單極 雙投微電機械系統開關。在一特別具體實施例中，該天線 裝置為一低輪廓平面反F天線。 在另外具體實施例中為分支天線形式，該天線元件的第 一部件為一主發射元件，第一連接形成該接地桿，及該第 二部件為一寄生元件至該天線元件，可由該第二連接的末 端之一連接接地。該第一開關的裝置較理想連接該接地桿 至接地’，經該第一或第二阻抗，及該第二開關的裝置較理 想連接該第二連接及該寄生元件至接地，經該第三或第四 阻抗。較理想，該阻抗開關裝置包括一雙極雙投微電機械 系統開關。在一特別具體實施例中，該天線裝置為一低輪 廓平面反F天線。 根據第二特徵，達成本發明的目標藉由配置一通信終端 機用於多重頻帶無線電通信，包括一外殼，一使用者輸入 及輸出介面，甚中該通信終端機包括根據前述本發明的第 84571 -10 - 1275200 和啟的a線t置，&選擇性任何前述具體實施例的另 外特徵。’ 山/豕第一特欲，達成本發明的目標藉由一無線電通信終 2機的可調式四重頻帶無線電天線裝置，該天線裝置包栝 接地基板、-包括一第一長型天線部件的雙頻帶天線元 件、一比該第一部件較短的第二長型天線部件、-連接該 4件土接地的接地連接及一阻抗開關$置可操作以改變該 連接的阻抗用於調整今 邊天、、泉兀件，致使在第一阻抗設定值 中天線元件在一第—乃—贫—> μ 、、、 · 及一罘一按線電頻率共振，及在第二 阻抗汉疋值中天線元件在一第三及一第四無線電頻率共振 ，該等頻率偏離該第—及第二無線電頻率。 根據第四特徵，造士、士 μ π 、成本餐明的目標藉由配置一通信終端 機用於四重頻帶β γ、 Ι Μ、、泉電遇信，包括一外殼、一使用者輸入 及輸出介面，JL Φ誇 ’、μ遇信終端機包括根據前述本發明的第 三特徵的一天線裝置。 實施方式 本說·明稱無線電饮：山4办 、、；％機為裝置其中完成一根據本發明設 計的無線電天線。夕叫> & ^ ;β無線電終端機包括所有行動設備裝 配置用於無線電通作—么姑a / " …、、、泉電口’該無線電台可以為行動 終端機或一固定的其u △ 土也口。結果，名詞無線電終端機包括 行動電話、呼叫哭、1 ^ _ Μ偽态、電子組織器、智慧型電話、 PDA(個人數位助理）、套 u }車上典線電通信裝置或其他，及可攜 式膝型電腦用於I绩7二 果吕，如WLAN(無線區域網路）。另外 ，因為該天線適合杆# 〜 仃動使用，但不限於，必須了解名詞無 84571 -11 - 1275200 線電終端機也包括無線 . 電_ , . m仏的任何固定裝置，如膝上型 私知、印表機、傳真機等 . 作式命甘^ >从 守’配置用來操作彼此無線電通 1口或與其他無線電台 Μ Ά 44. xl ^ " ’然根據本發明天線設計的結 構及特性本文主要舉例 0〇 , 1卜為仃動電話内的構造，加以說 明，但不可解釋本發明Ying designed a small multi-band branch printing antenna on W〇01/9 1233. The antenna can cover the triple band using a parasitic metal component. In order to have dual band performance in two telecommunication systems with different frequency bands, it must be possible to operate in four different frequency bands. One example is the GSM application covering the 4 bands in the US and Europe: US GSM800 (824 MHz-894 MHz) 84571 1275200 'European GSM900 (880 MHz-960 MHz), European GSM1800 (1710 MHz-1 880 MHz) and US GSM 1 900 (1 850 MHz-1 990 MHz). The result is that four communication terminals and antennas are required, so that it can operate in four-band operation. Inventive Internal Intervention Accordingly, it is an object of the present invention to overcome the disadvantages associated with the prior art. More specifically, one objective is to provide an antenna for radio communication that can operate in different dual band radio communication systems where different communication systems use different dual band frequencies. According to the first feature, the object is achieved by using an adjustable radio antenna device by a non-electrical communication terminal, the antenna device comprising a grounding substrate, an antenna element and a grounding rod connecting the antenna element to the grounding substrate, wherein the impedance switch The device is operable to vary the impedance of the connection between the antenna element and the grounded substrate for adjusting the antenna element to different resonant frequencies. In a specific embodiment, the impedance switching device includes a MEMS switch. The inner core '3 Hai antenna element includes a first long type of SHA member, and a second long type of 4 pieces is shorter than the first elongated part, wherein the impedance switch is operable to be at the first impedance setting value Inter-switching, wherein the components are respectively resonated at a first lower parent and a first higher frequency band, and a second impedance set value, wherein the side members are respectively at - the second lower and the second higher frequency Band resonance. In the embodiment, the impedance switching device includes a first operable switch to change the impedance of the first connection between the first component and the ground substrate, and a second operable switch to change the second component and the grounded substrate The second connection between the ppf 〇 〇 々 Γ Γ 孩 孩 一 一 一 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩 孩The impedance setting value and the device of the second switch are operative to selectively set a third impedance to the first impedance setting value or a fourth impedance to the second impedance setting value. In a specific embodiment, the antenna element is a branch antenna, wherein the first component is a first branch of the antenna element, and the second component is a second branch of the antenna component, each branch having a first and a second end Where the branch connects the ground rod of the first end. Preferably, the device of the first switch is connected to the second end of the first branch to the ground through the first or second impedance, and the device of the second switch is preferably connected to the second end of the second branch to the ground via the first Three or fourth impedance. Preferably, the impedance switching device comprises a single pole double throw micro electromechanical system switch. In a particular embodiment, the antenna device is a low profile planar inverse F antenna. In another embodiment, in the form of a branch antenna, the first component of the antenna element is a primary radiating element, the first connection forms the grounding rod, and the second component is a parasitic element to the antenna element, which can be One of the ends of the connection is connected to ground. The device of the first switch is preferably connected to the grounding rod to the grounding, through which the first or second impedance, and the device of the second switch are preferably connected to the second connection and the parasitic element to the ground, via the third Or the fourth impedance. Preferably, the impedance switching device comprises a bipolar double throw micro electromechanical system switch. In a particular embodiment, the antenna assembly is a low profile planar inverse F antenna. According to a second feature, the object of the invention is achieved by configuring a communication terminal for multi-band radio communication comprising a housing, a user input and output interface, and the communication terminal comprises an 84571 according to the aforementioned invention. -10 - 1275200 and a line t, & select additional features of any of the foregoing specific embodiments. 'Mountain/豕 first desire to achieve the object of the present invention by means of a radio communication terminal 2 adjustable quadruple-band radio antenna device, the antenna device comprising a grounded substrate, comprising a first long antenna component a dual-band antenna element, a second long antenna component shorter than the first component, a ground connection connecting the four earth grounds, and an impedance switch $ operable to change the impedance of the connection for adjusting the present The sky and spring elements cause the antenna element to resonate at a first-impedance setting value in a first-negative-> μ, , , and one-by-one line frequency, and at a second impedance The mid-antenna element resonates at a third and a fourth radio frequency that deviate from the first and second radio frequencies. According to the fourth feature, the target of the sergeant, the squirrel π, and the cost of the meal is configured by using a communication terminal for the quadruple band β γ, Ι Μ, and the spring electric signal, including a casing, a user input, and The output interface, JL Φ 夸 ', μ 信 terminal includes an antenna device according to the third feature of the foregoing invention. Embodiments The present invention is hereinafter referred to as a radio drink: a device in which a device is a radio antenna designed in accordance with the present invention.夕叫>&^;β radio terminal includes all mobile equipment installed for radio communication - 么姑 a / " ...,,,,,,,,,,,,,,,,,,,,,, Its u △ soil is also mouth. As a result, the noun radio terminal includes a mobile phone, a call cry, a 1 ^ _ Μ pseudo state, an electronic organizer, a smart phone, a PDA (personal digital assistant), a set u } a car-on-line electrical communication device or the like, and The portable knee-type computer is used for the performance of 7 guolu, such as WLAN (Wireless Local Area Network). In addition, because the antenna is suitable for lever # 〜 仃 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Know, printer, fax machine, etc.. Lifetime ^ > From the 'configuration' used to operate each other's radio pass 1 or with other radio stations Ά . 44. xl ^ " 'Rather according to the antenna design of the present invention Structure and characteristics The main examples in this paper are 0〇, 1 Bu is the structure in the mobile phone, which is explained, but the invention cannot be explained.
心故、'天、桌設計不能用於其形式的無線 電終端機，如上述所列。黑A ..._ 另外，必須強調本文及附件申請 專利靶圍用來說明所包岑庐 〜經、A 0和欲、元件或步驟的該名詞不可 用千釋為排除所述以外的其 . /、他特欲、兀件或步騾。 本發明的說明主要夂去；Μ . .茺，考兩個具體實施例，兩者皆關係蜂 果式行動電話。兩個例子關係内裝用的平面反F天線。不過 :從目：的說明熟悉本技術者會了解，雖然未顯示，如令 印專利範圍主張本發明同样 > 、 t通用於典線電通信用的其他形 式的天線，如根部天線或微帶。 圖1顯示本發明第—JL W奋、A , t . ”睹男她例的示意圖。由於微電子及 記憶體儲存能力的發展，通信終端機供應商儘力配合終端 機用迹的要求生產小《又小的終端機。為了獲得—小型終 端機，.強力推；i；速你多f相，此i Μ ^ , 馬迕1 j夕重頻▼天線。圖1具體實施例顯示具 有根據本發明配置的—PIFA。這種天線具有一輸入接針5及 一接地桿6,接觸天線至印刷電路板PCB2的接地平面。圖i 的特足具體實施例為一雙頻帶分支天線，具有一第一長型 部件3在第一無線電頻率共振，及一第二長型部件*比第一 長型部件3較短。第二長型部件4在第二無線電頻率共振， 第二無線電頻率高於第一無線電頻率。不考慮天線的特定 尺寸及形狀，手設計為一廣為人知的雙頻帶無線電天線設 84571 -12 - 1275200 計。如果天線裝置i要用於四重頻帶應用，這種天線不能直 接使用。較理想’四頻帶應用使用的終端機適合具有不同 的共振頻率對的不同雙頻帶系統。較理想為一個四頻帶涵 盖知圍的例子’終端機適合歐洲及美國的GSM系統的雙頻 帶應用。這是圖1具體實施例及圖4具體實施例說明的例子 ，雖然熟悉本技術者能如所述實現本發明但是對其他情況 也具有一技術效果，特別是四頻帶應用。 圖1的天線裝置1的幾何形狀為一分支PIFA天線。長支3以 GSM 900操作，而短支4以GSM18〇〇操作，即表示該天線調 整成歐洲模式。接地桿6連接第一部件3至第一末端7的接地 ，從此部件3伸長成長型至第二末端9。同樣，部件4從接地 桿6的接地連接的第一末端8伸長至第二末端丨〇。在部件3的 第二末端9於部件3及接地2之間配置一連接丨丨經一電抗負 載21。部件4具有一分離連接12連接該部件的第二末端1〇至 接地2經另外電抗負載22。各電抗負載21、22具有一適合阻 杬开y成各S支的共振頻率。根據本發明，各電抗負載包括 一阻抗，開關2卜22能經連接U、以移阻抗。阻抗開關21 、22在-具體實施例中係分開操作，但在—較佳具體實施 例中則作為-阻抗開關裝置2Q操作，圖中以虛線表示。 圖2顯示由第一分支部件3的阻抗偏移達到頻率調整的原 =。阻抗開關21的電抗負載選擇性設定為第一阻抗值Z1或 弟一阻抗值Z2。如果開關21設定為Z1天線部件3的共振頻率 適合歐洲模式的900 MHz共振。如果開關21偏移致使連接n 連接天線部件j至接地2經第二阻抗Z2，共振頻率減少致使 84571 -13 - 1275200 適合美國模式的800 MHz。 圖3相對圖2。但顯示兩分支3、4的阻抗開關2 1、22。類 似第一阻抗開關21，也在圖2說明，圖3顥示分支4的阻抗開 關22包括第三阻抗Z3及第三阻抗Z4，經其中之一連接12連 接天線邵件4至接地2。天線部件4較理想，如前述，分支適 合用於較高頻率的雙頻帶系統。如果開關22連接接地2至Z3 ’天線邵件4的共振頻率設定為歐洲模式的1 800 MHz。由切 換連接1 2致使天線部件4連接至接地2經阻抗Z4，分支4的共 振頻率切換至美國模式的丨9〇〇 MHz。在一較佳的本具體眚 施例的實現中，阻抗開關21、22使用SPDT(單極雙投）MEMS (微電機械系統）開關。本用途使用MEMS開關具有優點因為 低插入損失及低功率消耗。另外，因為MEMS開關為機械式 不用時不消耗任何功率，因為沒有電流通過，用於移動電 話甚為理想。SPDT開關係用於接收及發射之間切換，例如 Schultz等人在美國專利4,803,447中所揭露。在„具體實施 例中，開關不只由MEMS控制，而是包括在其中。藉由施加 不同電位的電壓，則經由該開關獲得不同阻抗。 根據圖1天線裝置1的天線原理已經完成電腦模擬。圖8顯 示由模擬測量獲得的回波損失曲線。如果阻抗開關裝置20 在第一設定值，致使開關2丨提供連接丨〗的阻抗z丨及開關2 2 k供連接12的阻抗Z3，天線裝置丨適合歐洲模式。設定值相 關的模擬結果由圖8及曲線81表示。如果阻抗開關裝置2〇偏 移，致使開關22提供連接11的阻抗Z2及開關22提供連接u 的阻抗Z4，天線裝置1適合美國模式。呈网伊』 一 口夭u俣氕吴國杈式的模擬結果 84571 -14 - 1275200 由圖8的曲線80表示。如圖顯示，雙頻帶範圍適合由阻抗開 關衣且20偏和，其中獲得一四頻帶天線裝置工。圖8顯示的 模挺^果係天線單獨執行。如果天線包封在一通信終端機 ，如圖7的一戶電話的外殼或機座内，曲線80及81的頻率稍 微向下偏和。所以天線元件的共振分別適合美國或歐洲模 式的 800及 19〇〇 MHz或 900及 1800 MHz。 圖4顯不本發明另一項具體實施例。在此情況下，天線裝 置1〇1包括第一長型天線部件30，連接接地20經接地桿60， 及經一連接50輸入。第一天線部件3〇從接地連接6〇的第一 末端伸長至第二末端9〇，部件3〇的長度經選擇致使與第一 無線電頻率共振。在一熟悉本技術者了解的情況中，第二 天線部件40為一寄生元件的形式，連接至該寄生元件的第 一末端80的連接12〇的接地。寄生部件4〇從第一末端8〇伸長 至第二末端100，及寄生部件4〇的長度比第一天線部件3〇較 ^ 致使奇生邯件4 〇在一第二及較高的無線電頻率共振。 這種幾何形狀相對一雙頻帶寄生天線，為先前技術所熟知 。在本·具體實施例中，接地連接60，或接地桿60，連接天 線元件30至接地20經阻抗開關210。同樣，寄生件4〇的接地 連接120連接接地20經第二阻抗開關220。阻抗開關21〇、22〇 係分·開操作，雖然在一較佳具體實施例中通常以一阻抗開 關^^置2 0 0操作，圖中以虛線表示。 圖5揭露第一天線部件30的阻抗開關210的基本原理。阻 抗開關210選擇性設定致使接地連接6〇連接天線部件％至 接地20經第一 &抗Z10，或致使連接60連接天線部件3〇至接 84571 -15 - 1275200 地20經第二阻抗Z20。藉由改變接地連接60的阻抗影響天線 元件3 0的共振頻率致使根據阻抗設定值而在不同無線電頻 率共振。 與圖3相似的情況，圖6顯示圖4的具體實施例的阻抗開關 裝置200的配置。在圖6中，顯示天線元件3〇及4〇，及接地 連接6 0、1 2 0經各阻抗開關210、2 2 0至接地2 0。如第一阻抗 開關210，第二阻抗開關220選擇性設定至接地連接12〇的第 三阻抗Z30，或至天線元件4〇及接地20之間接地連接12〇的 第四阻抗Z40。藉由切換阻抗開關22〇，偏移寄生元件4〇的 共振頻率。在一較佳的本具體實施例的實現中，使用DpDT (雙極雙投）MEMS開關以控制開關21〇、220。同樣，dptd 也具有低插入損失及低功率消耗，因而具有優點。另外， 如上逑因為MEMS開關為機械式不使用時不消耗任何功率 。同樣，MEMS也包括本開關。 圖9顯示圖8相對的模擬結果’但現在則用於圖4_6所示的 具阮貝她例。必須 >王意水平軸的的尺度與圖8相同，即是〇 $ 土-.5 GHz每度為〇.1 GHz。在歐洲模式系統於及 1800 MHz操作’及參考曲線”表示天線裝置調為歐洲模式 具有阻抗開關裝置2 〇 〇分別苛金$ 4、 刀力丨」叹疋至阻抗Z10及z 30時的回波 損失。如果切換阻抗開關壯田〇 n 仇「开」關农且200分別至阻抗z2〇及Z40，天 線裝置1 0 1調整為美國握+ .,, 、 /旲式，其中較低頻率向下偏移及較高 頻丰向上偏移以回收回、、於福生 口皮知失如曲線90所示。如果天線包封 在一通信終端機，如圖7的一泰 、 戶电浩的外殼或機座内，曲線9 〇 及9 1的頻率稍微向下偏梦 -；卜偏私。所以天線元件的共振分別適合 84571 -16 - 1275200 吴=或歐洲模式的_及19()()顧中⑽及工酬隐。. 、〜果，本發明提供一種方法用於調整雙頻帶無線電天線 成為四頻帶無線電天線，由使用天線接地連接的阻抗開關 以碉整共振頻率。如熟悉本技術者所了解，天線的分支可 大於2。另外，各阻抗開關具有2以上的選擇設定值，如3或 4個不同阻抗，用於調整不同頻率。所揭露的具體實施例主. 要提供-簡化且能說明的實現本發明的方法。適合的應用 _ 領域’如先前所述，用於蜂巢式無線電通信系統的可攜式φ 行動電話，如GSM、D-AMPS、UMTS、CDMA2_等。 圖7顯示用於多重頻帶無線電通信所配置的一蜂巢式行 動電話300的具體實施例的一通信無線電終端機。終端機 〇⑽包括一機座或外殼350，由傳聲器31〇的形式載運一使用 者首訊輸入及由擴音器320或一連接器的形式載運使用者 首矾輸出至一耳機（未顯示）。一組鍵，鈕或其他構成一可用 的資料輸入介面330，根據所建立的方式撥號。一資料輸出 介面包括一顯示器340進一步包括，使用熟悉本技術者所知 # 勺方式，頻示通仏貝釩，位址表等。無線電通信終端機3〇〇 匕括典線電發射及接收電子設備（未顯示），及配置天線，如 内裝式天線裝置1於外殼350之内，該天線裝置圖中以虛線 表不，該天線為一幾乎為平面的物件。根據本發明，天線 衣置1，對照圖1或圖4，包括一平面接地基板2或2 〇，一天 線元件3、4或30、40具有一無線電訊號輸入點5或5〇，一接 地桿6或60，及一阻抗開關20或200，連接天線元件至接地 經—可選擇的1¾抗以便調整天線至不同頻帶。上述根據本 84571 -17 - 1275200 2天線設計的其轉徵用於圖7具㈣施觸無線電終 端機當然同樣有效。 · 以上說明本發明的原理，較佳具體實施例及操作模式。 :過，本發明不能解釋為限於上述的具體實施例。例如， ::、、、本*明的天線主要作為發射器討論，減本技術者會 :本^明的天線也可作為感應器用於接收特定頻率的資 Λ。同樣’各元件的尺寸可根據特別的應用而變化。另外 本1月的阻抗為電容式、電阻式及/或電感式，完全根據 天線=件的設計及希望的共振。因此，上述具體實施例只 —來解4而非限制’及必須明白熟悉本技術者對這些具體 ，、她例所作的、k化並不背離下列本發明中請範圍的範 圍。 ^考下列較佳具體實施例的詳細說明及附圖，將使本發 明的上述及其他優點變為明顯，其中： 圖1為根據本發明第一具體實施例的一可調式多重頻帶 無線電天線裝置的示意圖； 圖2為根據圖丨具體實施例的一分支的輸入及接地連接的 示意圖； 圖3為根據圖1具體實施例的不同分支的接地連接的阻抗 開關配置的示意圖； 固為根據本發明第一具體實施例的一可調式多重頻帶 無線電天線裝置的示意圖； 圖5為根據圖—2具體實施例的主發射元件的輸入及接地連 84571 -18 - 1275200 接的不意圖， 圖6為根據圖4具體實施例的主發射元件及附屬件的接地 連接的阻抗開關配置的示意圖； 圖7為根據本發明一具體實施例的通信終端機的天線設 計的不意圖， 圖8顯示根據圖1的特定具體實施例的回波損失的模擬結 果；及 圖9顯示根據圖4的特定具體實施例的回波損失的模擬結 果。 . 圖式代表符號說明 1 雙頻帶分支天線 2 印刷電路板 3 第一長型天線部件 4 第二長型天線邵件 5 輸入接針 6 接地桿 7 ' 第一邵件的第一末端 8 第二部件的第一末端 9 第一部件的第二末端 10 弟—部件的弟二末端 11 連接 12 連接 20 阻抗開關裝置 21 第一丨里抗開關 84571 -19 - 1275200 22 第二阻抗開關 30 第一長型天線部件 40 第二長型天線部件 50 連接 60 接地桿 70 第一部件的第一末端 80 第二部件的第一末端 90 第一部件的第二末端 100 第二部件的第二末端 101 天線裝置 120 連接 210 第一阻抗開關 220 第二阻抗開關 300 蜂巢式行動電話 310 傳聲器 320 擴音益 330 ' 資料輸入介面 340 顯示器 350 外殼 84571 -20 -The heart, the 'day, table design cannot be used in its form of radio terminals, as listed above. Black A ... _ In addition, it must be emphasized that this article and the annex apply for a patent target to describe the package, the A 0 and the intended, component or step of the term is not available for the exclusion of the other. /, his special desires, conditions or steps. The description of the present invention is mainly omitted; Μ . . . , two specific embodiments, both of which are related to a bee-type mobile phone. Two examples relate to a planar inverted-F antenna for interior use. However, it will be understood by those skilled in the art that although not shown, the scope of the patent is claimed to be the same as that of the invention, and other types of antennas, such as root antennas or microstrips, used for standard line communication. Figure 1 shows a schematic diagram of the first JL W, A, t. 睹 她 她 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 Small terminal. In order to obtain - small terminal, strong push; i; speed you more f phase, this i Μ ^, 迕 1 j 重 频 ▼ antenna. Figure 1 shows a specific embodiment according to the present invention Configurable - PIFA. The antenna has an input pin 5 and a grounding rod 6, which contacts the antenna to the ground plane of the printed circuit board PCB 2. The specific embodiment of Figure i is a dual band branch antenna having a first The elongate member 3 resonates at a first radio frequency, and a second elongate member* is shorter than the first elongate member 3. The second elongate member 4 resonates at a second radio frequency, the second radio frequency being higher than the first Radio frequency. Regardless of the specific size and shape of the antenna, the hand is designed to be a well-known dual-band radio antenna set to 84571 -12 - 1275200. If the antenna device i is to be used in quad-band applications, this antenna cannot be used directly. ideal Terminals used in quad-band applications are suitable for different dual-band systems with different resonant frequency pairs. Ideally a four-band example encompasses the 'terminals' for dual-band applications in GSM systems in Europe and the US This is Figure 1. The specific embodiments and the examples illustrated in the specific embodiment of FIG. 4, although those skilled in the art can implement the present invention as described, but have other technical effects, especially four-band applications. The geometry of the antenna device 1 of FIG. It is a branch PIFA antenna. The long branch 3 is operated by GSM 900, and the short branch 4 is operated by GSM18〇〇, which means that the antenna is adjusted to the European mode. The grounding rod 6 connects the first component 3 to the ground of the first end 7, from then on The member 3 is elongated to the second end 9. Similarly, the member 4 is extended from the first end 8 of the ground connection of the grounding rod 6 to the second end 丨〇. At the second end 9 of the member 3 is at the part 3 and the ground 2 A connection is made between a reactive load 21. The component 4 has a separate connection 12 connecting the second end 1 of the component to the ground 2 via an additional reactive load 22. Each of the reactive loads 21, 22 has a The resonant frequency of each S branch is split by y. According to the invention, each reactive load includes an impedance, and the switch 2 can be connected to U to shift the impedance. The impedance switches 21, 22 are separated in the specific embodiment. Operation, but in the preferred embodiment, operates as an impedance switching device 2Q, indicated by a dashed line in the figure. Figure 2 shows the original offset = frequency adjustment by the impedance offset of the first branching member 3. The reactance load selectivity is set to the first impedance value Z1 or the first impedance value Z2. If the switch 21 is set to the resonance frequency of the Z1 antenna component 3, it is suitable for the 900 MHz resonance of the European mode. If the switch 21 is offset, the connection n is connected to the antenna component j. To ground 2 via the second impedance Z2, the reduction in resonant frequency results in the 84571 -13 - 1275200 being suitable for 800 MHz in US mode. Figure 3 is relative to Figure 2. However, the impedance switches 2 1 and 22 of the two branches 3 and 4 are displayed. Similar to the first impedance switch 21, also illustrated in FIG. 2, the impedance switch 22 of the branch 4 of FIG. 3 includes a third impedance Z3 and a third impedance Z4, and one of the connections 12 connects the antenna member 4 to the ground 2. Antenna component 4 is preferred, as previously described, the branch is suitable for use in higher frequency dual band systems. If the switch 22 is connected to the ground 2 to the Z3' antenna, the resonant frequency of the antenna 4 is set to 1 800 MHz in the European mode. Switching connection 1 2 causes antenna component 4 to be connected to ground 2 via impedance Z4, and the resonant frequency of branch 4 is switched to 丨9 〇〇 MHz in US mode. In a preferred implementation of the present embodiment, the impedance switches 21, 22 use SPDT (monopolar dual throw) MEMS (Micro Electro Mechanical System) switches. The use of MEMS switches for this purpose has advantages due to low insertion loss and low power consumption. In addition, because the MEMS switch is mechanical, it does not consume any power, because no current is passed, which is ideal for mobile phones. The SPDT-on relationship is used for the purpose of the switching between the receiving and the transmitting, as disclosed in U.S. Patent 4,803,447. In the specific embodiment, the switch is not only controlled by the MEMS but is included therein. By applying voltages of different potentials, different impedances are obtained via the switch. Computer simulation has been completed according to the antenna principle of the antenna device 1 of Fig. 1. 8 shows the echo loss curve obtained by the analog measurement. If the impedance switching device 20 is at the first set value, the switch 2 丨 provides the impedance z丨 of the connection 丨 and the impedance Z3 of the switch 2 2 k for the connection 12, the antenna device 丨Suitable for the European mode. The set value related simulation results are shown in Figure 8 and curve 81. If the impedance switching device 2 is offset, causing the switch 22 to provide the impedance Z2 of the connection 11 and the switch 22 providing the impedance Z4 of the connection u, the antenna device 1 is suitable American model. Presented in the network. The simulation results of the 夭u俣氕 Wu Guofan type 84571 -14 - 1275200 are represented by the curve 80 of Figure 8. As shown in the figure, the dual-band range is suitable for the impedance switch and the 20-bias, where Obtain a four-band antenna device. The antenna shown in Figure 8 is implemented separately. If the antenna is enclosed in a communication terminal, the casing or machine of a telephone as shown in Figure 7. In the block, the frequencies of curves 80 and 81 are slightly downwardly biased, so the resonance of the antenna elements is suitable for 800 and 19 〇〇 MHz or 900 and 1800 MHz respectively in the US or European mode. Figure 4 shows another embodiment of the present invention. In this case, the antenna device 101 includes a first long antenna component 30, the connection ground 20 is connected via the grounding bar 60, and is input via a connection 50. The first antenna component 3 is connected from the ground connection 6〇 Extending one end to the second end 9〇, the length of the member 3〇 is selected to resonate with the first radio frequency. In the case known to those skilled in the art, the second antenna component 40 is in the form of a parasitic element, connected The grounding of the connection 12〇 to the first end 80 of the parasitic element. The parasitic element 4〇 is extended from the first end 8〇 to the second end 100, and the length of the parasitic element 4〇 is higher than that of the first antenna part 3〇 The odd element 4 is caused to resonate at a second and higher radio frequency. This geometry is well known in the prior art with respect to a dual band parasitic antenna. In this embodiment, the ground connection 60, or ground. Rod 60, connected to the sky The component 30 to the ground 20 pass through the impedance switch 210. Similarly, the ground connection 120 of the parasitic element 4 is connected to the ground 20 via the second impedance switch 220. The impedance switches 21, 22 are separated and opened, although in a preferred embodiment In the example, the operation is usually performed by an impedance switch, which is indicated by a broken line. Figure 5 discloses the basic principle of the impedance switch 210 of the first antenna component 30. The impedance switch 210 is selectively set to cause the ground connection 6〇 connection. The antenna component % to ground 20 passes through the first & anti-Z10, or causes the connection 60 to connect the antenna component 3 〇 to the 84071 -15 - 1275200 ground 20 via the second impedance Z20. Affecting the resonant frequency of the antenna element 30 by varying the impedance of the ground connection 60 causes resonance at different radio frequencies depending on the impedance set point. Similar to Fig. 3, Fig. 6 shows the configuration of the impedance switching device 200 of the embodiment of Fig. 4. In Fig. 6, antenna elements 3A and 4A are shown, and ground connections 60, 1 2 0 pass through respective impedance switches 210, 2 2 0 to ground 20. For example, the first impedance switch 210, the second impedance switch 220 is selectively set to the third impedance Z30 of the ground connection 12A, or to the fourth impedance Z40 of the ground connection 12A between the antenna element 4 and the ground 20. The resonant frequency of the parasitic element 4A is shifted by switching the impedance switch 22A. In a preferred implementation of this embodiment, a DpDT (Bipolar Double Drop) MEMS switch is used to control the switches 21A, 220. Similarly, dptd has the advantage of low insertion loss and low power consumption. In addition, as above, because the MEMS switch is mechanically unused, it does not consume any power. Similarly, MEMS also includes this switch. Fig. 9 shows the relative simulation result of Fig. 8 but now it is used for the example of the mussel shown in Fig. 4-6. The scale of the > king's horizontal axis is the same as that of Figure 8, ie 〇 $ soil - .5 GHz per degree is 〇.1 GHz. In the European mode system and the 1800 MHz operation 'and reference curve', the antenna device is set to the European mode with the impedance switch device 2 苛 苛 $ $ 4 苛 苛 苛 苛 苛 苛 苛 疋 疋 疋 疋 疋 疋 疋 疋 疋 疋 疋 疋 疋 疋 疋 疋 疋 疋 疋 疋 疋 疋 疋loss. If the switching impedance switch Zhuang Tian 〇 n hatred "open" Guan Nong and 200 to impedance z2 〇 and Z40 respectively, the antenna device 1 0 1 is adjusted to the US grip + ., , , / ,, where the lower frequency is shifted downward And the higher frequency is shifted upwards to recover, and the loss of the skin is as shown by curve 90. If the antenna is enclosed in a communication terminal, as shown in Figure 7, the housing or the base of the household electric power, the frequency of the curves 9 〇 and 9 1 is slightly downward-dreaming. Therefore, the resonance of the antenna elements is suitable for 84571 -16 - 1275200 Wu = or European mode _ and 19 () () Guzhong (10) and work compensation. The present invention provides a method for adjusting a dual-band radio antenna to become a four-band radio antenna, which is an impedance switch connected using an antenna ground to trim the resonance frequency. As will be appreciated by those skilled in the art, the branch of the antenna can be greater than two. In addition, each impedance switch has a selection setting of 2 or more, such as 3 or 4 different impedances, for adjusting different frequencies. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is intended to provide a simplified and illustrative method of carrying out the invention. Suitable Applications _ Fields As previously described, portable φ mobile phones for cellular radio communication systems, such as GSM, D-AMPS, UMTS, CDMA2_ and the like. Figure 7 shows a communication radio terminal for a particular embodiment of a cellular mobile telephone 300 configured for multi-band radio communication. The terminal unit (10) includes a base or housing 350, and carries a user first input input in the form of a microphone 31A and carries the user's first output to a headset (not shown) in the form of a loudspeaker 320 or a connector. . A set of keys, buttons or other forms an available data input interface 330 for dialing according to the established method. A data output interface including a display 340 further includes, using a method known to those skilled in the art, a scoop vanadium, an address table, and the like. The radio communication terminal 3 includes an electric transmitting and receiving electronic device (not shown) and an antenna, such as a built-in antenna device 1 in the outer casing 350, which is indicated by a broken line in the antenna device. The antenna is an almost planar object. According to the present invention, the antenna device 1 is included with reference to FIG. 1 or FIG. 4, including a planar ground substrate 2 or 2, and an antenna element 3, 4 or 30, 40 has a radio signal input point 5 or 5, a ground rod. 6 or 60, and an impedance switch 20 or 200, connecting the antenna elements to ground via an optional 13⁄4 anti-adjustment to adjust the antenna to different frequency bands. The above-mentioned design for the antenna design according to the present 84571 -17 - 1275200 2 is of course equally effective for the application of the radio terminal of Fig. 7 (4). The foregoing illustrates the principles, preferred embodiments, and modes of operation of the invention. The invention may not be construed as being limited to the specific embodiments described above. For example, the antennas of ::, , and * are mainly discussed as transmitters. The technicians of this technology can also use the antennas of the present invention as sensors to receive resources of a specific frequency. Again, the dimensions of the various components may vary depending on the particular application. In addition, the impedance of this January is capacitive, resistive and/or inductive, depending on the design of the antenna = component and the desired resonance. Therefore, the above-described embodiments are only intended to be illustrative of the scope of the invention, and the scope of the present invention is not to be construed as a limitation. BRIEF DESCRIPTION OF THE DRAWINGS The above and other advantages of the present invention will become apparent from the following detailed description of the preferred embodiments of the invention. 2 is a schematic diagram of an input and ground connection of a branch according to the embodiment of the present invention; FIG. 3 is a schematic diagram of an impedance switch configuration of a ground connection of different branches according to the embodiment of FIG. 1; 1 is a schematic diagram of a tunable multi-band radio antenna device of the first embodiment; FIG. 5 is a schematic diagram of the input and ground connection of the main transmitting element according to the embodiment of FIG. 2, and the connection of the 84571 -18 - 1275200 is not intended, FIG. 6 is based on FIG. 4 is a schematic diagram showing an impedance switch configuration of a ground connection of a main transmitting element and an accessory according to a specific embodiment of the present invention; FIG. 7 is a schematic diagram of an antenna design of a communication terminal according to an embodiment of the present invention, and FIG. Simulation results of echo loss for a particular embodiment; and FIG. 9 shows a simulated knot of echo loss in accordance with a particular embodiment of FIG. . Fig. Representative symbol description 1 Dual band branch antenna 2 Printed circuit board 3 First long antenna part 4 Second long antenna piece 5 Input pin 6 Grounding rod 7 'First end of the first piece 8 Second The first end of the component 9 the second end of the first component 10 - the second end of the component 11 the connection 12 the connection 20 the impedance switch device 21 the first impedance switch 84571 -19 - 1275200 22 the second impedance switch 30 the first long Antenna component 40 second long antenna component 50 connection 60 grounding bar 70 first end of first component 80 first end of second component 90 second end of first component 100 second end of second component 101 antenna device 120 connection 210 first impedance switch 220 second impedance switch 300 cellular mobile phone 310 microphone 320 amplified sound 330 ' data input interface 340 display 350 housing 84571 -20 -