201222971 六、發明說明： 【發明所屬之技術領域】 本發明為有關於一種通訊裝置及其通訊方法，特別是指一種 接收天線的天線增益大於發射天線，且根據接收的通信品質選揮 接收天線的具非對稱增益天線的通訊裝置及其通訊方法。、 【先前技術】 近年來，隨著無線通訊的普及與蓬勃發展，造成各種無線通 訊裝置如雨後春荀般產生’不過，由於各國為了有效利用及管制 無線頻譜，因此皆會限制特定頻率的發射功率，用以提供不同的 無線通訊協定來進行使用，然而這也造成訊號傳輸距離受到限制。 一般而言，無線通訊裝置具有一支天線來進行收發，且其發 射功率受所在地的法令規範，這意味著倘若要透過增加天線增益 來提尚訊號傳輸距離，將使得發射功率因提高天線增益而相對增 加，甚至造成超出所在地的法令規範。因此，在發射功率符合法 令規範的情況下，如何有效提高無線通訊裝置的訊號傳輸距離已 成為各家廠商急欲解決的問題之一。 有鑑於此，便有廠商提出增加天線的天線增益，並且偵測發 射功率是否超出法令規範，若超出則自動調降功率後再發射，反 之則不用調降功率。不過，由於提高天線增益將造成天線的輕射 角度窄小，故容易受環境影響而產生偏差導致通訊不穩定的問題。 表t、上所述，可知先前技術中長期以來一直存在於發射功率符 合法令規範且維持通訊穩定的情況下，無法有效延伸訊號傳輸距 離之問題，因此實有必要提出改進的技術手段，來解決此一問題。 【發明内容】 201222971 有赛於先前技術存在的問題，本發明遂揭露一種具非對稱增 益天線的通訊裝置及其通訊方法。 曰 本發明所揭露之具非對稱增益天線的通訊裴置，包含：發射 天線、接收天線、收發單元、記錄單元、運算單元及控制單元。 其中，發射天線用以傳送發射訊號；接收天線分別接收另一通訊 裝置所發出的通信訊號，其中接收天線的天線增益大於發射天線 的天線增益；收發單摘合至發射天線及透過選擇n麵合至接收 擊天線，此收發單元用以產生發射訊號並透過發射天線傳送，以及 於初始時自每—接收天雜收職域；記錄單摘合至收發單 兀’用以伽每-接收天線接收到的通信訊號以記錄為相應的通 仏品質’運算單元耗合至記錄單元，用以比對記錄的各通信品質 以判斷優劣，並且根據各通信品質的優劣及其接收天線的天線增 益選擇其卜接收天線；控鮮元用以根據選擇的接收天線切換 選擇器，使選擇器維持與選擇的接收天線相互電性連接，以供收 發單元持續自選擇的接收天線接收通信訊號。 • 至於本發明之具非對稱增益天線的通訊裝置之通訊方法，應 用於與另一通訊裝置之間的通訊，其步驟包括：提供用以傳送發 射訊號的發射天線；提供接收天線以分別接收另一通訊裝置所發 .出的通信訊號，其中接收天線的天線增益大於發射天線的天線增 益，於初始時自每一接收天線接收通信訊號；偵測每一接收天線 接收到的通信訊號以記錄為相應的通信品質；比對記錄的各通信 品質以判斷優劣，並且根據各通信品質的優劣及其接收天線的天 線增益選擇其中一接收天線；根據選擇的接收天線切換選擇器， 使選擇器維持與選擇的接收天線相互電性連接，以持續自選擇的 201222971 接收天線接收通信訊號。 本發明所揭露之裝置與方法如上，與先前技術之間的差異在 於本發月7C透過配置具有不同天線增益的發射天線及至少一支的 接收天線j其中至少一支接收天線的天線增益分別大於發射天線 且彼^匕不同，運作時透過_來自接收天線的通信訊號以記錄其 通仏。〇質，再根據接收時的通信品質即時切換選擇出合適的接收 天線。 ,透過上述的軸手段，本發明可輯賴訊雜輸距離及通 訊穩定性進行優化處理之技術功效。 鲁 【實施方式】 以下將配合圖式及實施例來詳細說明本發明之實施方式，藉 此對本發明如何應用技術手段來解決技術問題並達成技術功效的 實現過程能充分理解並據以實施。 在說明本發明所揭露之具非對稱增益天線的通訊裝置及其通 δίΐ方法之刖，先對本發明所應用的環境架構作說明，本發明所述 的具非對稱增益天線的通訊裝置是應用在一個通訊設備(例如：集籲 線器、路由器）中，用以透過發射天線及接收天線傳輸各種訊號， 其中接收天_天線增益大於發射天線，以便增加訊賴接收距 離。由於此通訊裝置中的接收天線與發射天線具有不同的天線增 益，因此訊號的接收距離與傳送距離亦不相同，故需要搭配相同 天線配置的其它通訊裝置才能夠延長訊號傳輸距離，並且在延長 訊號傳輸距離的情況下確保訊號傳輸正常，換句話說，第一個通 訊裝置的接收天線及發射天線的天線增益需要分別與第二個通訊 裝置的接收天線及發射天線的天線增益相同。如此一來，即使通 6 201222971 訊裝置的接收距離與訊號的發射距離不同亦能維持正常通信。特 I要說月的疋，雖然本發明在延長訊號傳輸距離的情況下，需要 搭配具有同樣天雜置的其它通訊裝置，然而，本發明亦可在不 延長訊號傳輸距離的情況下與其它具有不同天線配置的通訊裝置 進行訊號傳輸。 以下配合圖式對本發明具非對稱增益天線的通訊裝置及其通 訊方法作進—步，請參閱「第1圖」，「第1圖」為本發明具 非對稱增益天線的通訊裝置之裝置方塊圖，包含：發射天線U〇、 接收天線(111、112)、收發單元120、選擇器121、記錄單元130、 運算單元140及控制單元15〇。其中，發射天線11〇用以傳送發射 訊號’接收天線(111、112)則分別接收另一通訊裝置所發出的通信 訊號’而且接收天線(⑴、112)的天線增益大於發射天線11〇。在 實際實施上，可同時設置多支接收天線(1U、112)及一支發射天線 110，其中各接收天線(111、112)可分別具有各種大於發射天線110 的天線增益。舉例來說，假設發射天線110的天線增益為“3dbi ”，則各接收天線(111、112)的天線增益可分別為“5(11^，’、“7制 ’’及“l〇dbi”……等等。特別要說明的是，本發明並未以此限定 發射天線110及接收天線(111、112)的天線增益，所述發射天線11〇 的天線增益以其產生的發射功率符合所在地的電信規範為準，而 接收天線(111、112)的天線增益則大於發射天線11〇的天線增益即 可。除此之外’在實際的天線配置上，亦可僅設置一支接收天線 111及一支發射天線110以分別作為接收通信訊號及傳送發射訊號 之用，同樣地，此接收天線111的天線增益仍然需大於發射天線 110的天線增益。 201222971 收發單元120耦合至發射天線no及透過選擇器121耦合至 接收天線(111、112)，此收發單元120用以產生發射訊號並透過發 射天線110傳送，以及於初始時自每一接收天線(m、112)接收通 信訊號，並且於初始完成後持續自其中一支接收天線接收通信訊 號。在實際實施上，收發單元120能夠進行數位及類比之間的轉 換，例如.將接收天線(111、112)接收到的通信訊號轉為數位形式 的資料，以及將數位形式的資料轉換成類比形式的發射訊號後透 . 過發射天線110進行傳送。特別要說明的是，所述選擇器121是 一個切換開關，能夠透電訊號進行控制以電性連接(即短路)至其中鲁 一支接收天線，以便在收發單元120初始完成後持續使用這支接 收天線來接收通信訊號，稍後將配合圖式說明其收發單元12〇與 發射天線及接收天線的電路連接方式。 §己錄單元130耦合至收發單元丨2〇，用以偵測每一接收天線 (111、112)接收到的通信訊號以記錄為相應的通信品質。在實際實 施上，其偵測方式可每隔一段時間輪流偵測各接收天線(lu、112) 所收到通信訊號之功率大小及偵測分析位元錯誤率(Bit Err〇r Rate，籲 BER)或兩者任一，以及偵測其通信訊號的訊號來源，以便記錄為 相應接收天線的通信^質，此―記料元13G可以是如：快取記 憶體(Cache memoiy)、快閃記憶體(Flash mem〇ry)……等揮發性 (Volatile)或非揮發性(N〇n_volatile)的記憶體裝置。由於偵測功率大 小及分析位元錯誤率均為習知技術，故在此不再多作贅述。 運算單元140搞合至記錄單元13G，用以比對記錄單元13〇 所記錄的各通信品質明斷優劣，並且根據各通信品質的優劣及 其接收天線的天朗益來選擇其巾—接彳m其選擇方式可先 8 201222971 考量通信品質_劣再考量接收天線的天線增益大小，如：先選 出通信品質優良的接收天線，再從這些接收天線中選出天線增益 最小的一支接收天線。舉例來說，假設運算單元14〇經運算後得 知第-支接收天線111的通信品質高於第二支接收天線112，且第 -支接收天線111的天線增益小於第二支接收天線112的天線增 益’那麼運算單元14G將選擇第—支接收天線ηι作為接收通^ •訊號所使用的天線。在實際實施上，運算單元140預先儲存有每 -接收天線(11卜m)的天線增益，以便在通信品質相同的情況 下’選擇天線增益最低的接收天線明加輻職圍(即提高維 信的可偏移量）。另外，運算單元⑽更可預先對記錄單元13〇所 祕的各通信品質進行碱’舉.說，在概時間且相同接收 天線的條件下，預先猶掉少數差異較大的通信品質之記錄後再 進行比對。 控制單元150用峰據運算單元14〇職擇的触天線切換 所述收發單元12G中的選擇器121，使此選擇器121維持與選擇的 •接收天線相互電性連接，以供收發單元U0持續自選擇的接收天 線接收通信峨。換句話說，當選擇器121與選擇的接收天線相 互電性連接後’收發單元12G即完成初始化，並且僅透過選擇的 .接收天線持續接收通信訊號。特別要說明的是，當收發單元12〇 無法接收通信訊號或通信訊號的通信品質為劣等時，將使收發單 元120重設為初始狀態，並再次自每一接收天線(1η、ιΐ2)接收通 信訊號’以供運算單元14〇重新選擇其中一支接收天線來接收通 信訊號。 除此之外，本發明具非對稱增益天線的通訊裝置更可包含低 201222971 雜訊放大器，此低雜訊放大器一端串接選擇器121，另一端則串接 至收發單元120,以便將來自選擇的接收天線之通信訊號進行訊號 放大。在實際實施上，本發明亦可以低雜訊增益單元取代低雜訊 放大器，並且包含耦合至運算單元140及低雜訊增益單元的調整 單元160,以便調整單元160用以根據運算單元14〇選出的接收天 線之通信品質來調整(即放大或衰減)低雜訊增益單元的增益，使通 信品質維持在最佳狀態，此低雜訊增益單元可為自動增益控制 . 型，稍後將配合圖式作詳細說明。 接著，請參閱「第2圖」，「第2圖」為本發明具非對稱增益鲁 天線的通訊裝置之通訊方法的方法流程圖，應用於與另一通訊裝 置之間的通訊，其步驟包括：提供用以傳送發射訊號的發射天線 (步驟210);提供接收天線以分別接收另一通訊裝置所發出的通信 訊號，其中接收天線的天線增益大於發射天線的天線增益(步驟 220);於初始時自每一接收天線接收通信訊號(步驟23〇);偵測每 一接收天線接收到的通信訊號以記錄為相應的通信品質（步驟 240);比對記錄的各通信品質以判斷優劣，並且根據各通信品質的 _ 優劣及其接收天線的天線增益選擇其中一接收天線(步驟25〇);根 據選擇的接收天線切換選擇器，使選擇器維持與選擇的接收天線 相互電性連接，以持續自選擇的接收天線接收通信訊號(步驟 260)。透過上述步驟’即可透過配置具有不同天線增益的發射天線. 及至少-支的接收天線’其巾至少—支接收天_天線增益分別 大於發射天線且彼此不同，運作時透過偵測來自接收天線的通信 訊號以記錄其通信品質，再根據接收時的通信品質即時切換選擇 出合適的接收天線。特別要說明的是，在步驟26〇之後，可透過 201222971 低雜訊增益單元將選擇的接收天線所接收的通信訊號進行訊號放 大或衰減(步驟270);以及可根據選出的接收天線之通信品質來調 整低雜訊增益單元的增益值(步驟280)。 以下配合「第3圖」及「第4圖」以實施例的方式進行如下 說明’請先參閱「第3圖」’「第3圖」為本發明控制單元切換選 擇器之電路示意圖。其中，發射天線11〇用以傳送發射訊號，接 收天線(111、112)則分別接收另一通訊裝置所發出的通信訊號， 所述接收天線(111、112)的天線增益大於發射天線110的天線增 益；收發單元120可耦合低雜訊放大器122，並且在低雜訊放大器 122及接收天線(111、112)之間串接有選擇器121。以此例而言， 收發單元120透過串接的低雜訊放大器丨22及一對二的切換開關 (即選擇器121)搞合至兩支接收天線(in、112)來接收通信訊號， 以及可透過一個功率放大器123耦合一支發射天線11〇來傳送發 射訊號。 接著，記錄單元130耦合至收發單元12〇以偵測每一接收天 • 線(111、112)所接收到的通信訊號，以便記錄成相應各接收天線 (111、112)的通信品質，例如：記錄接收天線U1的通信品質為 “-70dbm ;優良”、記錄接收天線112的通信品質為“_8〇dbm ; ，劣等”，其中“-70dbm”及“-80dbm”代表接收天線hi及接收 天線112的接收功率、“優良，，及“劣等，，則是記錄單元13〇根 據接收天線111及接收天線112的位元錯誤率(BER)來進行判斷。 承上所述，運算單元140根據記錄單元130所記錄的通信品 質進行比對後，將根據各通信品質的優劣及其接收天線的天線增 益來選擇其中一支接收天線’以上例而言’假設第一支接收天線 201222971 111的天線增益小於第二支接收天線112，由於接收天線lu的通 信品質較佳且第一支接收天線111的天線增益較小，故運算單元 140會在兩支接收天線(111、112)中選擇接收天線⑴。此時，控 制單元150根據運算單元140選擇的接收天線m來控制選擇器 121切換開關，使選擇器121與接收天線111相互電性連接(即短 路）’而選擇器121與接收天線112則為斷路。如此一來，收發單 元120便可經由接收天線ill接收通信訊號，並且透過低雜訊放 大器122放大此通信訊號以進行後續的訊號處理。特別要說明的 是，在實際實施上，假設運算單元14〇比對後得知兩支接收天線 (111、112)的通信品質相同，則運算單元14〇會再比對這兩支接收 天線(111、112)的天線增益以選擇天線增益較小的接收天線。另 外，假設具有三支或三支以上的接收天線(圖中未示），運算單元 14 0可讀取通信品質最優良的接收天線之天線增益及通信品質最 劣等的接收天線之天線增益來計算平均值，並且選擇天線增益與 此平均值最接近的接收天線。 、、清參閱「第4圖」，「第4®」為本發明調整單元調整低雜訊 增益單元的增益之電路示意目。前面提纟彳調整單元_可根據運 算單元140選出的接收天線之通信品質來調整低雜訊增益單元 ^的增益，使通信品質維持在最佳狀態。在此射，低雜訊增益 單元124可為自動增益控制型，並且與調整單元16〇才目互電性連 接’以便接收調整單元16G傳送的電訊號來調整增纟，舉例來說， 假設控制單W50控㈣娜121使收發單元12()與接收天線⑴ 才互電f生連接彳綠接收天線1U接收到的通信訊號具有不同的 接收功率’如..7Gdbm”、“·_bm”，則運算單元⑽可根 12 201222971 據通彳§品質過濾掉不必要的通信訊號(例如：過濾接收功率較低的 通信訊號，或是根據通信訊號的訊號來源進行過濾接著透過調 整單元160根據過濾後的通信訊號之接收功率來調整低雜訊增益 單元124的增益’例如：接收功率在“_i〇〇dbm”以下則自動增益 為二倍；接收功率在“Odbm”以上則自動衰減為兩倍......等等。 雖然本發明以上述舉例說明接收功率及調整增益，然本發明並未 以此為限，換句話說，只要能夠根據接收功率或訊號品質(可藉由 位元錯誤率來判斷)來調整(例如：放大或衰減)低雜訊增益單元124 •的增益’皆不脫離本發明的應用範疇。 細上所述’可知本發明與先前技術之間的差異在於透過配置 具有不同天線增益的發射天線110及至少一支的接收天線，其中 至少一支接收天線的天線增益分別大於發射天線且彼此不同，運 作時透過偵測來自接收天線的通信訊號以記錄其通信品質，接著 再根據接收時的通信品質即時切換選擇出合適的接收天線，藉由 此技術手¥又可以解決先剛技術所存在的問題，進而達成提高訊 Φ 號傳輸距離及通訊穩定性之技術功效。 雖然本發明以前述之實施例揭露如上，然其並非用以限定本 發明，任何熟習相像技藝者，在不脫離本發明之精神和範圍内， • 當可作些許之更動與潤飾，因此本發明之專利保護範圍須視本說 明書所附之申請專利範圍所界定者為準。 【圖式簡單說明】 第1圖為本發明具非對稱增益天線的通訊裝置之裝置方塊 圖。 第2圖為本發明具非對稱增益天線的通訊裝置之通訊方法的 13 201222971 方法流程圖。 第3圖為本發明控制單元切換選擇器之電路示意圖。 第4圖為本發明調整單元調整低雜訊增益單元的增益之電路 示意圖。 【主要元件符號說明】 110 發射天線 111 ' 112 接收天線 120 收發單元 121 選擇器 122 低雜訊放大器 123 功率放大器 124 低雜訊增益單元 130 記錄單元 140 運算單元 150 控制單元 160 調整單元 步驟210提供用以傳送一發射訊號的一發射天線 步驟220 提供至少一接收天線以分別接收另一通訊裝置所發 出的一通信訊號，其中該至少一接收天線的天線增 益大於該發射天線的天線增益 步驟230 於初始時自每一接收天線接收一通信訊號 步驟240 偵測每一接收天線接收到的該通信訊號以記錄為相 應的一通信品質 步驟250 比對記錄的各該通信品質以判斷優劣，並且根據各 201222971 該通信品質的優劣及其接收天線的天線增益選擇 該至少一接收天線其中之一 步驟260根據選擇的該接收天線切換—選擇器，使該選擇器 維持與選擇的該接收天線相互電性連接，以持續自 選擇的該接收天線接收該通信訊號 步驟270透過-低雜訊增益單元將選擇的該接收天線所接收 的該通信訊號進行訊號放大或衰減 步驟280，據選出的接收天線之通信品f調整該低雜訊增益 單元的增益值201222971 VI. Description of the Invention: [Technical Field] The present invention relates to a communication device and a communication method thereof, and particularly to a receiving antenna having an antenna gain greater than a transmitting antenna, and selecting a receiving antenna according to the received communication quality Communication device with asymmetric gain antenna and communication method thereof. [Prior Art] In recent years, with the popularization and vigorous development of wireless communication, various wireless communication devices have been produced like springs. However, due to the effective use and control of the wireless spectrum, countries will limit the transmission of specific frequencies. Power is used to provide different wireless protocols for use, but this also limits the transmission distance of the signal. In general, a wireless communication device has an antenna for transmitting and receiving, and its transmission power is regulated by the local law, which means that if the antenna transmission distance is increased by increasing the antenna gain, the transmission power will be increased by the antenna gain. The relative increase has even caused regulations beyond the local jurisdiction. Therefore, how to effectively increase the signal transmission distance of a wireless communication device has become one of the problems that various manufacturers are eager to solve when the transmission power meets the requirements of the law. In view of this, some manufacturers have proposed to increase the antenna gain of the antenna, and to detect whether the transmitted power exceeds the legal specifications. If it exceeds, the power is automatically adjusted and then transmitted, and vice versa. However, since the antenna gain is narrowed due to the increase in the antenna gain, it is susceptible to environmental fluctuations and the communication is unstable. Table t, above, it can be known that the prior art has long existed in the case where the transmission power conforms to the law and the communication is stable, and the problem of the signal transmission distance cannot be effectively extended. Therefore, it is necessary to propose an improved technical means to solve the problem. This question. SUMMARY OF THE INVENTION 201222971 There is a problem in the prior art, and the present invention discloses a communication device having an asymmetric gain antenna and a communication method thereof. The communication device with an asymmetric gain antenna disclosed in the present invention comprises: a transmitting antenna, a receiving antenna, a transceiver unit, a recording unit, an arithmetic unit and a control unit. The transmitting antenna is configured to transmit the transmitting signal; the receiving antenna respectively receives the communication signal sent by the other communication device, wherein the antenna gain of the receiving antenna is greater than the antenna gain of the transmitting antenna; the transmitting and receiving singles are extracted to the transmitting antenna and the selected n-face is combined To receive the antenna, the transceiver unit is configured to generate a transmission signal and transmit through the transmitting antenna, and at the initial time from the reception-receiving field; the record slip is sent to the transceiver unit to receive the gamma-receiving antenna The communication signal is recorded as the corresponding overnight quality. The arithmetic unit is used to calculate the quality of each communication quality, and the quality of each communication quality is determined according to the quality of each communication quality and the antenna gain of the receiving antenna. The receiving antenna is configured to switch the selector according to the selected receiving antenna to maintain the selector electrically connected to the selected receiving antenna, so that the transceiver unit continuously receives the communication signal from the selected receiving antenna. • The communication method of the communication device with the asymmetric gain antenna of the present invention is applied to communication with another communication device, the steps comprising: providing a transmitting antenna for transmitting a transmission signal; providing a receiving antenna to respectively receive another a communication signal sent by a communication device, wherein an antenna gain of the receiving antenna is greater than an antenna gain of the transmitting antenna, and a communication signal is received from each receiving antenna at an initial time; and a communication signal received by each receiving antenna is detected to be recorded as Corresponding communication quality; compare and judge the quality of each communication to judge the advantages and disadvantages, and select one of the receiving antennas according to the quality of each communication quality and the antenna gain of the receiving antenna; switch the selector according to the selected receiving antenna to maintain the selector The selected receiving antennas are electrically connected to each other to continuously receive the communication signal from the selected 201222971 receiving antenna. The apparatus and method disclosed in the present invention are as above, and the difference from the prior art is that the antenna gain of at least one of the receiving antennas of the transmitting antennas having different antenna gains and at least one of the receiving antennas of the present month is greater than The transmitting antennas are different from each other and operate through the communication signal from the receiving antenna to record their wanted. The enamel is then switched on and off according to the communication quality at the time of reception to select a suitable receiving antenna. Through the above-mentioned axis means, the present invention can solve the technical effect of optimizing the processing distance and communication stability. [Embodiment] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings and embodiments, and thus the implementation of the present invention to solve the technical problems and achieve the technical effects can be fully understood and implemented. After describing the communication device with the asymmetric gain antenna disclosed in the present invention and the method for passing the same, the environmental architecture to which the present invention is applied is first described. The communication device with the asymmetric gain antenna according to the present invention is applied to A communication device (for example, a set line hopper, a router) transmits various signals through the transmitting antenna and the receiving antenna, wherein the receiving antenna _ antenna gain is greater than the transmitting antenna, so as to increase the receiving distance. Since the receiving antenna and the transmitting antenna in the communication device have different antenna gains, the receiving distance and the transmitting distance of the signal are also different. Therefore, other communication devices with the same antenna configuration are required to extend the signal transmission distance and extend the signal. In the case of the transmission distance, it is ensured that the signal transmission is normal. In other words, the antenna gains of the receiving antenna and the transmitting antenna of the first communication device need to be the same as those of the receiving antenna and the transmitting antenna of the second communication device, respectively. In this way, normal communication can be maintained even if the receiving distance of the device is different from the transmitting distance of the signal. In particular, although the present invention is used to extend the distance of signal transmission, it is necessary to match other communication devices having the same day. However, the present invention can also have other transmissions without extending the signal transmission distance. Communication devices with different antenna configurations transmit signals. The following is a schematic diagram of a communication device with an asymmetric gain antenna and a communication method thereof according to the present invention. Please refer to FIG. 1 and FIG. 1 is a device block of a communication device with an asymmetric gain antenna according to the present invention. The figure includes a transmitting antenna U, a receiving antenna (111, 112), a transceiver unit 120, a selector 121, a recording unit 130, an arithmetic unit 140, and a control unit 15A. The transmitting antenna 11 is configured to transmit the transmitting signal. The receiving antennas (111, 112) respectively receive the communication signals issued by the other communication device and the receiving antennas ((1), 112) have antenna gains greater than the transmitting antennas 11'. In practical implementation, multiple receiving antennas (1U, 112) and one transmitting antenna 110 may be simultaneously provided, wherein each receiving antenna (111, 112) may have various antenna gains larger than the transmitting antenna 110, respectively. For example, assuming that the antenna gain of the transmitting antenna 110 is "3dbi", the antenna gains of the receiving antennas (111, 112) can be "5 (11^, ', "7 system" and "l〇dbi", respectively. In particular, the present invention does not limit the antenna gain of the transmitting antenna 110 and the receiving antennas (111, 112), and the antenna gain of the transmitting antenna 11〇 is in accordance with the transmitting power generated by the antenna. The telecom specification is correct, and the antenna gain of the receiving antenna (111, 112) is greater than the antenna gain of the transmitting antenna 11〇. In addition, in the actual antenna configuration, only one receiving antenna 111 may be provided. And a transmitting antenna 110 for receiving the communication signal and transmitting the transmitting signal respectively. Similarly, the antenna gain of the receiving antenna 111 still needs to be larger than the antenna gain of the transmitting antenna 110. 201222971 The transceiver unit 120 is coupled to the transmitting antenna no and through The selector 121 is coupled to the receiving antennas (111, 112) for generating transmit signals and transmitting them through the transmit antenna 110, and initially receiving from each of the receive antennas (m, 112) a signal, and continuously receiving a communication signal from one of the receiving antennas after initial completion. In practical implementation, the transceiver unit 120 is capable of performing a conversion between digits and analogies, for example, receiving communications received by the receiving antennas (111, 112). The signal is converted into digital form data, and the digital form of the data is converted into an analog form of the transmitted signal, and then transmitted through the transmitting antenna 110. In particular, the selector 121 is a switch capable of transmitting through the telecommunications. The number is controlled to be electrically connected (ie, short-circuited) to one of the receiving antennas, so that the receiving antenna is continuously used to receive the communication signal after the transceiver unit 120 is initially completed, and the transceiver unit 12 will be described later in conjunction with the drawing. The circuit is connected to the transmitting antenna and the receiving antenna. The recording unit 130 is coupled to the transceiver unit 丨2〇 to detect the communication signal received by each receiving antenna (111, 112) for recording as a corresponding communication quality. In actual implementation, the detection mode can detect the power of the communication signals received by the receiving antennas (lu, 112) in turn at regular intervals. Small and detection analysis bit error rate (Bit Err〇r Rate, BER) or both, and the source of the signal to detect its communication signal, in order to record the communication of the corresponding receiving antenna, this "recording The element 13G may be a memory device such as a cache memory (Cache memoiy), a flash memory (Flash mem〇ry), etc., such as a volatile (Volatile) or a non-volatile (N〇n_volatile) memory. The power level and the analysis bit error rate are well-known techniques, and therefore will not be described in detail herein. The operation unit 140 is coupled to the recording unit 13G for comparing the quality of each communication recorded by the recording unit 13A. And according to the quality of each communication quality and the antenna of the receiving antenna, choose the towel - the connection method can be selected 8 201222971 Consider the communication quality _ inferior to consider the antenna gain size of the receiving antenna, such as: first select the communication quality An excellent receiving antenna, and then a receiving antenna with the smallest antenna gain is selected from these receiving antennas. For example, it is assumed that the operation unit 14 knows that the communication quality of the first branch receiving antenna 111 is higher than that of the second receiving antenna 112, and the antenna gain of the first branch receiving antenna 111 is smaller than that of the second receiving antenna 112. The antenna gain 'the arithmetic unit 14G will select the first branch receiving antenna ηι as the antenna used for receiving the signal. In practical implementation, the arithmetic unit 140 pre-stores the antenna gain of each-receiving antenna (11 b), so that the antenna antenna with the lowest antenna gain is selected to be the same as the communication quality (ie, the frequency of the antenna is increased). Offset). In addition, the arithmetic unit (10) can perform an alkalinization of each communication quality secreted by the recording unit 13 in advance, and after a record of the communication quality of a small difference in advance, under the condition of the same time and the same receiving antenna. Then compare. The control unit 150 switches the selector 121 in the transceiver unit 12G by using the antenna of the peak operation unit 14 to maintain the selector 121 to be electrically connected to the selected receiving antenna for the transceiver unit U0 to continue. The communication antenna is received by the selected receiving antenna. In other words, when the selector 121 is electrically connected to the selected receiving antenna, the transceiver unit 12G completes initialization and continuously receives the communication signal through the selected receiving antenna. In particular, when the communication quality of the transceiver unit 12 that cannot receive the communication signal or the communication signal is inferior, the transceiver unit 120 is reset to the initial state, and the communication is received again from each of the receiving antennas (1n, ι2). The signal 'for the arithmetic unit 14 〇 reselects one of the receiving antennas to receive the communication signal. In addition, the communication device with the asymmetric gain antenna of the present invention may further include a low 201222971 noise amplifier, the low noise amplifier is connected in series with the selector 121 at one end, and the other end is serially connected to the transceiver unit 120 so as to be selected from the selection. The communication signal of the receiving antenna is amplified by the signal. In an actual implementation, the present invention can also replace the low noise amplifier with a low noise gain unit, and includes an adjustment unit 160 coupled to the operation unit 140 and the low noise gain unit, so that the adjustment unit 160 can be selected according to the operation unit 14. The communication quality of the receiving antenna adjusts (ie, amplifies or attenuates) the gain of the low noise gain unit to maintain the communication quality at an optimal state. The low noise gain unit can be an automatic gain control type. The formula is described in detail. Next, please refer to "Fig. 2", which is a flowchart of a method for communicating a communication device with an asymmetric gain-lu antenna, which is applied to communication with another communication device, and the steps thereof include Providing a transmitting antenna for transmitting a transmitting signal (step 210); providing a receiving antenna to respectively receive a communication signal sent by another communication device, wherein an antenna gain of the receiving antenna is greater than an antenna gain of the transmitting antenna (step 220); Receiving a communication signal from each receiving antenna (step 23A); detecting a communication signal received by each receiving antenna to record the corresponding communication quality (step 240); comparing the quality of each communication recorded to determine the pros and cons, and Selecting one of the receiving antennas according to the quality of each communication quality and the antenna gain of the receiving antenna (step 25A); switching the selector according to the selected receiving antenna, so that the selector maintains electrical connection with the selected receiving antenna to continue The self-selected receiving antenna receives the communication signal (step 260). Through the above steps, it is possible to configure a transmitting antenna having different antenna gains and at least a receiving antenna of at least one of the receiving antennas. The antenna gain is larger than the transmitting antennas and different from each other, and the detecting antenna is received from the receiving antenna. The communication signal is recorded to record the communication quality, and then the appropriate receiving antenna is selected and switched according to the communication quality at the time of reception. In particular, after step 26, the communication signal received by the selected receiving antenna can be amplified or attenuated by the 201222971 low noise gain unit (step 270); and the communication quality of the selected receiving antenna can be selected. The gain value of the low noise gain unit is adjusted (step 280). The following description will be made by way of example with reference to "Fig. 3" and "Fig. 4". Please refer to "Fig. 3" and "3rd drawing" for the circuit diagram of the control unit switching selector of the present invention. The transmitting antenna 11 is configured to transmit a transmitting signal, and the receiving antennas (111, 112) respectively receive a communication signal sent by another communication device, and the antenna gain of the receiving antenna (111, 112) is greater than the antenna of the transmitting antenna 110. Gain; the transceiver unit 120 can be coupled to the low noise amplifier 122, and a selector 121 is connected in series between the low noise amplifier 122 and the receiving antennas (111, 112). In this example, the transceiver unit 120 is coupled to the two receiving antennas (in, 112) through the serial low noise amplifier 丨22 and the pair of two switching switches (ie, the selector 121) to receive the communication signal, and A transmit signal can be transmitted by coupling a transmit antenna 11A through a power amplifier 123. Next, the recording unit 130 is coupled to the transceiver unit 12 to detect the communication signals received by each of the receiving antennas (111, 112) for recording the communication quality of the respective receiving antennas (111, 112), for example: The communication quality of the recording receiving antenna U1 is "-70dbm; excellent", and the communication quality of the recording receiving antenna 112 is "_8〇dbm; inferior", wherein "-70dbm" and "-80dbm" represent the receiving antenna hi and the receiving antenna 112. The received power, "excellent," and "inferior" are determined by the recording unit 13A based on the bit error rate (BER) of the receiving antenna 111 and the receiving antenna 112. As described above, the arithmetic unit 140 compares the communication qualities recorded by the recording unit 130, and selects one of the receiving antennas according to the quality of each communication quality and the antenna gain of the receiving antenna. The antenna gain of the first receiving antenna 201222971 111 is smaller than that of the second receiving antenna 112. Since the communication quality of the receiving antenna lu is better and the antenna gain of the first receiving antenna 111 is smaller, the arithmetic unit 140 will have two receiving antennas. The receiving antenna (1) is selected in (111, 112). At this time, the control unit 150 controls the selector 121 to switch the switch according to the receiving antenna m selected by the arithmetic unit 140, so that the selector 121 and the receiving antenna 111 are electrically connected to each other (ie, short-circuited), and the selector 121 and the receiving antenna 112 are Open circuit. In this way, the transceiver unit 120 can receive the communication signal via the receiving antenna ill, and amplify the communication signal through the low noise amplifier 122 for subsequent signal processing. In particular, in actual implementation, it is assumed that the computing unit 14 〇 knows that the communication qualities of the two receiving antennas (111, 112) are the same, and the computing unit 14 比 compares the two receiving antennas again ( 111, 112) Antenna gain to select a receiving antenna with a smaller antenna gain. In addition, assuming that there are three or more receiving antennas (not shown), the arithmetic unit 140 can calculate the antenna gain of the receiving antenna with the best communication quality and the antenna gain of the receiving antenna with the worst communication quality. Average, and select the receiving antenna whose antenna gain is closest to this average. For details, see "Figure 4" and "4th" is the circuit diagram for adjusting the gain of the low noise gain unit by the adjustment unit of the present invention. The front adjustment unit _ can adjust the gain of the low noise gain unit ^ according to the communication quality of the receiving antenna selected by the operation unit 140, so that the communication quality is maintained at an optimum state. In this shot, the low noise gain unit 124 may be of an automatic gain control type and electrically connected to the adjustment unit 16 to receive the electrical signal transmitted by the adjustment unit 16G to adjust the enhancement, for example, assuming control The single W50 control (four) Na 121 enables the transceiver unit 12 () and the receiving antenna (1) to be electrically connected to each other. The green receiving antenna 1U receives communication signals having different receiving powers such as ..7Gdbm and "·_bm". The computing unit (10) can root 12 201222971 to filter out unnecessary communication signals according to the quality of the communication (for example, filtering the communication signal with lower received power, filtering according to the signal source of the communication signal, and then filtering according to the filtering unit 160 The received power of the communication signal adjusts the gain of the low noise gain unit 124. For example, if the received power is below "_i〇〇dbm", the automatic gain is doubled; when the received power is above "Odbm", the automatic attenuation is doubled. Although the present invention exemplifies the received power and the adjustment gain by the above, the present invention is not limited thereto, in other words, as long as it can be based on the received power or signal. The quality (which can be judged by the bit error rate) to adjust (eg, amplify or attenuate) the gain of the low noise gain unit 124 • does not deviate from the scope of application of the present invention. The difference between the technologies is that by configuring the transmitting antenna 110 having different antenna gains and at least one receiving antenna, at least one of the receiving antennas has antenna gains greater than the transmitting antennas and different from each other, and is detected by detecting from the receiving antennas. The communication signal records the communication quality, and then immediately selects and selects the appropriate receiving antenna according to the communication quality at the time of receiving, so that the technical problem can solve the problem of the first technology, thereby achieving the improvement of the transmission distance of the signal Φ. And the technical effects of the communication stability. Although the present invention is disclosed above in the foregoing embodiments, it is not intended to limit the present invention, and those skilled in the art, without departing from the spirit and scope of the present invention, Modifications and retouching, therefore, the scope of patent protection of the present invention is subject to the scope of patent application attached to this specification. BRIEF DESCRIPTION OF THE DRAWINGS [Fig. 1 is a block diagram of a communication device with an asymmetric gain antenna according to the present invention. Fig. 2 is a communication method of a communication device with an asymmetric gain antenna according to the present invention. 13 201222971 Method flow chart Figure 3 is a circuit diagram of the control unit switching selector of the present invention. Fig. 4 is a circuit diagram showing the adjustment unit adjusting the gain of the low noise gain unit according to the present invention. [Main component symbol description] 110 Transmitting antenna 111 ' 112 receiving antenna 120 transceiver unit 121 selector 122 low noise amplifier 123 power amplifier 124 low noise gain unit 130 recording unit 140 arithmetic unit 150 control unit 160 adjustment unit step 210 provides a transmitting antenna for transmitting a transmitting signal step 220 Providing at least one receiving antenna to respectively receive a communication signal sent by another communication device, wherein the antenna gain of the at least one receiving antenna is greater than the antenna gain of the transmitting antenna, and the step of receiving a communication signal from each receiving antenna at the initial step 240 detects each receiving antenna connection The communication signal to be recorded is recorded as a corresponding communication quality step 250 to compare the quality of the communication to determine the quality and disadvantage, and the at least one receiving antenna is selected according to the quality of the communication quality of each 201222971 and the antenna gain of the receiving antenna. Step 260, according to the selected receiving antenna switching-selector, maintaining the selector electrically connected to the selected receiving antenna to continuously receive the communication signal from the selected receiving antenna. Step 270: Low-noise The gain unit performs a signal amplification or attenuation step 280 on the selected communication signal received by the receiving antenna, and adjusts the gain value of the low noise gain unit according to the selected communication product f of the receiving antenna.
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