TWI423599B - Method for reducing rf circuit area and communication apparatus using the same - Google Patents
Method for reducing rf circuit area and communication apparatus using the same Download PDFInfo
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本發明是有關於一種射頻電路,且特別是有關於減少射頻電路面積的方法及使用此方法的通訊裝置。This invention relates to a radio frequency circuit, and more particularly to a method of reducing the area of a radio frequency circuit and a communication device using the same.
目前無線通訊裝置也越來越趨於多樣化,例如智慧型行動電話,多媒體播放器,個人數位助理器以及衛星導航裝置等等。各項具有無線傳輸功能的電子裝置也都朝著輕薄短小的設計理念去改善,以達到更適合日常生活所使用的電子產品。值得一提的是,射頻電路是許多無線通訊系統不可或缺的必備元件,且其更為影響無線通訊裝置之整體性能的主要構成要件。At present, wireless communication devices are becoming more and more diverse, such as smart mobile phones, multimedia players, personal digital assistants, and satellite navigation devices. Electronic devices with wireless transmission functions are also being improved toward light, thin and short design concepts to achieve electronic products that are more suitable for daily use. It is worth mentioning that the RF circuit is an indispensable component of many wireless communication systems, and it is a major component of the overall performance of the wireless communication device.
以行動電話通訊系統為例,由於各國的電信規範不同,為了要達到在不同國家之間的漫遊,無線通訊裝置必須要支援多個頻帶。舉例來說,如下列表一所示,在歐洲,屬於第二代行動電話通訊技術規格(簡稱為2G)之全球行動通信系統(簡稱為GSM)所使用的頻帶有880~960MHz、1710~1880MHz,而屬於第三代行動電話通訊技術規格(簡稱為3G)之寬頻分碼多工多重存取系統(簡稱為WCDMA)所使用的頻帶有1920~2170MHz、880~960MHz。然而,在美國,GSM所使用的頻帶有824~894MHz、1850~1990MHz,而WCDMA所使用的頻帶有1850~1990MHz、824~894MHz。Taking the mobile telephone communication system as an example, since different countries have different telecommunication specifications, in order to achieve roaming between different countries, the wireless communication device must support multiple frequency bands. For example, as shown in the following list 1, in Europe, the frequency band used by the Global System for Mobile Communications (hereinafter referred to as 2G) for the second generation mobile phone communication technology specification (abbreviated as 2G) is 880 to 960 MHz and 1710 to 1880 MHz. The frequency band used by the wideband code division multiplexing multiple access system (referred to as WCDMA) belonging to the third generation mobile phone communication technical specification (referred to as 3G) has 1920 to 2170 MHz and 880 to 960 MHz. However, in the United States, the frequency bands used by GSM are 824-894 MHz and 1850-1990 MHz, and the frequency bands used by WCDMA are 1850-1990 MHz and 824-894 MHz.
換言之,為了達成在美國與歐洲漫遊,無線通訊裝置的射頻電路與天線,必須同時支援上述之表一所列的多個頻帶。通常每一頻帶有獨立的收發電路路徑,因此支援多個頻帶的無線通訊裝置通常具有較大的射頻電路面積。然而隨著各國的電信規範持續增加可以使用的無線通訊頻帶,例如,WCDMA系統陸續新增Band 9至Band 10的頻帶,無線通訊裝置之射頻電路面積將持續增加。如此,將導致無線通訊裝置的整體電路成本持續增加,以及減少其他模組(例如,觸控模組、照相模組、音響模組)等可以使用的空間。In other words, in order to achieve roaming in the United States and Europe, the radio frequency circuit and antenna of the wireless communication device must simultaneously support the multiple frequency bands listed in Table 1 above. Generally, each frequency band has an independent transceiver circuit path, so wireless communication devices supporting multiple frequency bands usually have a large RF circuit area. However, as national telecommunications specifications continue to increase the available wireless communication bands, for example, WCDMA systems will continue to add Band 9 to Band 10 bands, and the RF circuit area of wireless communication devices will continue to increase. As a result, the overall circuit cost of the wireless communication device will continue to increase, and the space available for other modules (eg, touch modules, camera modules, audio modules) and the like can be reduced.
承上所述,本發明之示範實施例提供一種減少射頻電路面積的方法及使用此方法的通訊裝置,利用隔離裝置或濾波裝置來減少其他接收信號或發射信號的干擾。另外,還針對頻率重疊之至少兩個接收頻帶的信號使用共同的接收路徑,並據此減少元件的成本與整體射頻電路的空間。In view of the above, an exemplary embodiment of the present invention provides a method of reducing the area of a radio frequency circuit and a communication apparatus using the same, using an isolation apparatus or a filtering apparatus to reduce interference of other received signals or transmitted signals. In addition, a common receive path is also used for signals of at least two receive bands whose frequencies overlap, and the cost of the components and the space of the overall radio frequency circuit are reduced accordingly.
根據本發明的一示範實施例,本發明提出一種減少射頻電路面積的方法,適用於在至少一第一頻帶與至少一第二頻帶中操作的一通訊裝置,而上述之減少射頻電路面積的方法包括以下步驟。利用一收發器來提供第一頻帶的一第一信號與第二頻帶的一第二信號,以及接收第一頻帶的一第三信號與第二頻帶的一第四信號,而第三信號之頻率與第四信號之頻率重疊。再者,利用一隔離器來接收第一信號以及隔離第二信號、第三信號與第四信號進入上述之收發器。另外,透過一雙工器來提供第三信號與第四信號給上述之收發器以及接收第二信號,而第三信號與第四信號共用上述之雙工器與收發器之間的一共同接收路徑。According to an exemplary embodiment of the present invention, the present invention provides a method for reducing the area of a radio frequency circuit, which is suitable for a communication device operating in at least a first frequency band and at least a second frequency band, and the method for reducing the area of the radio frequency circuit Includes the following steps. Using a transceiver to provide a first signal of the first frequency band and a second signal of the second frequency band, and receiving a third signal of the first frequency band and a fourth signal of the second frequency band, and the frequency of the third signal Overlaps the frequency of the fourth signal. Furthermore, an isolator is used to receive the first signal and to isolate the second signal, the third signal, and the fourth signal into the transceiver. In addition, the third signal and the fourth signal are supplied to the transceiver and the second signal through a duplexer, and the third signal and the fourth signal share a common reception between the duplexer and the transceiver. path.
在本發明之一示範實施例中,上述之減少射頻電路面積的方法還包括以下步驟。利用耦接於上述之隔離器與雙工器的一天線來無線發射第一信號與第二信號,以及無線接收第三信號與第四信號。另外,透過耦接於上述之天線、隔離器與雙工器的一交換器來切換第一頻帶與第二頻帶的多個信號。In an exemplary embodiment of the present invention, the method for reducing the area of the radio frequency circuit further includes the following steps. The first signal and the second signal are wirelessly transmitted by using an antenna coupled to the isolator and the duplexer, and the third signal and the fourth signal are wirelessly received. In addition, a plurality of signals of the first frequency band and the second frequency band are switched by a switch coupled to the antenna, the isolator, and the duplexer.
在本發明之一示範實施例中,上述之減少射頻電路面積的方法還包括當通訊裝置操作於第一頻帶時,透過上述之隔離器將第一信號由上述之收發器傳送至天線,並且透過上述之雙工器與共同接收路徑將第三信號由上述之天線傳送至收發器;以及當通訊裝置操作於第二頻帶時,透過雙工器將第二信號由收發器傳送至天線,並且透過雙工器與共同接收路徑將第四信號由天線傳送至收發器。In an exemplary embodiment of the present invention, the method for reducing the area of the radio frequency circuit further includes: when the communication device operates in the first frequency band, transmitting the first signal from the transceiver to the antenna through the isolator, and transmitting The duplexer and the common receiving path transmit the third signal from the antenna to the transceiver; and when the communication device operates in the second frequency band, the second signal is transmitted from the transceiver to the antenna through the duplexer, and is transmitted through the transceiver The duplexer and the common receive path transmit the fourth signal from the antenna to the transceiver.
根據本發明的另一示範實施例,本發明提出一種減少射頻電路面積的方法,適用於在至少一第一頻帶與至少一第二頻帶中操作的一通訊裝置,而上述之減少射頻電路面積的方法包括以下步驟。利用一收發器來提供第一頻帶的一第一信號與第二頻帶的一第二信號,以及接收第一頻帶的一第三信號與第二頻帶的一第四信號,而第三信號之頻率與第四信號之頻率重疊。再者,利用耦接於上述之收發器的一天線來無線發射第一信號與第二信號,以及無線接收第三信號與第四信號。另外,利用耦接於該收發器的一第一功率放大器來放大該第一信號;透過耦接於收發器的一雙工器來提供第三信號與第四信號給收發器以及接收第二信號,而第三信號與第四信號共用上述之雙工器與收發器之間的一共同接收路徑。又利用耦接於天線與雙工器的一交換器來切換第一頻帶與第二頻帶的多個信號。還利用耦接於上述之第一功率放大器、雙工器與該交換器的一濾波器來接收第一信號,並且濾波在濾波器與第一功率放大器、雙工器以及交換器連接之電路路徑上的雜訊,而濾波器實質上僅允許第一信號通過。According to another exemplary embodiment of the present invention, the present invention provides a method for reducing the area of a radio frequency circuit, which is suitable for a communication device operating in at least a first frequency band and at least a second frequency band, and the above-mentioned reducing the area of the radio frequency circuit The method includes the following steps. Using a transceiver to provide a first signal of the first frequency band and a second signal of the second frequency band, and receiving a third signal of the first frequency band and a fourth signal of the second frequency band, and the frequency of the third signal Overlaps the frequency of the fourth signal. Moreover, the first signal and the second signal are wirelessly transmitted by using an antenna coupled to the transceiver, and the third signal and the fourth signal are wirelessly received. In addition, the first signal is amplified by a first power amplifier coupled to the transceiver; the third signal and the fourth signal are supplied to the transceiver and the second signal are received through a duplexer coupled to the transceiver. And the third signal and the fourth signal share a common receiving path between the duplexer and the transceiver. A plurality of signals coupled to the first frequency band and the second frequency band are further switched by a switch coupled to the antenna and the duplexer. The first signal is also received by a filter coupled to the first power amplifier, the duplexer, and the switch, and the circuit path connecting the filter to the first power amplifier, the duplexer, and the switch is filtered. The noise on the filter, and the filter essentially only allows the first signal to pass.
根據本發明的一示範實施例,本發明提出一種通訊裝置,適用於在至少一第一頻帶與至少一第二頻帶中操作。上述之通訊裝置包括一收發器、一隔離器與一雙工器。收發器用以提供第一頻帶的一第一信號與第二頻帶的一第二信號,以及接收第一頻帶的一第三信號與第二頻帶的一第四信號,而第三信號之頻率與第四信號之頻率重疊。隔離器,耦接於收發器,用以接收第一信號,以及隔離第二信號、第三信號與第四信號進入收發器。另外,雙工器,耦接於收發器,用以提供第三信號與第四信號給收發器以及接收第二信號,而第三信號與第四信號共用雙工器與收發器之間的一共同接收路徑。In accordance with an exemplary embodiment of the present invention, the present invention provides a communication device adapted to operate in at least a first frequency band and at least a second frequency band. The above communication device comprises a transceiver, an isolator and a duplexer. The transceiver is configured to provide a first signal of the first frequency band and a second signal of the second frequency band, and receive a third signal of the first frequency band and a fourth signal of the second frequency band, and the frequency of the third signal The frequencies of the four signals overlap. The isolator is coupled to the transceiver for receiving the first signal and isolating the second signal, the third signal, and the fourth signal into the transceiver. In addition, the duplexer is coupled to the transceiver for providing the third signal and the fourth signal to the transceiver and the second signal, and the third signal and the fourth signal share a duplex between the duplexer and the transceiver. Common receiving path.
根據本發明的另一示範實施例,本發明提出一種通訊裝置,適用於在至少一第一頻帶與至少一第二頻帶中操作。上述之通訊裝置包括一收發器、一天線、一第一功率放大器、一雙工器、一交換器以及一濾波器。收發器用以提供第一頻帶的一第一信號與第二頻帶的一第二信號,以及接收第一頻帶的一第三信號與第二頻帶的一第四信號,而第三信號之頻率與第四信號之頻率重疊。一天線,耦接於收發器,用以無線發射第一信號與該第二信號,以及無線接收第三信號與第四信號。第一功率放大器,耦接於收發器,用以放大第一信號。雙工器,耦接於收發器,用以提供第三信號與第四信號給收發器以及接收第二信號,而第三信號與第四信號共用雙工器與收發器之間的一共同接收路徑。交換器,耦接於天線與雙工器,用以切換第一頻帶與第二頻帶的多個信號。另外,濾波器,耦接於第一功率放大器、雙工器與交換器,用以接收第一信號,以及濾波在濾波器與第一功率放大器、雙工器與交換器連接之電路路徑上的雜訊,而濾波器實質上僅允許第一信號通過。In accordance with another exemplary embodiment of the present invention, the present invention provides a communication device adapted to operate in at least a first frequency band and at least a second frequency band. The communication device includes a transceiver, an antenna, a first power amplifier, a duplexer, a switch, and a filter. The transceiver is configured to provide a first signal of the first frequency band and a second signal of the second frequency band, and receive a third signal of the first frequency band and a fourth signal of the second frequency band, and the frequency of the third signal The frequencies of the four signals overlap. An antenna is coupled to the transceiver for wirelessly transmitting the first signal and the second signal, and wirelessly receiving the third signal and the fourth signal. The first power amplifier is coupled to the transceiver for amplifying the first signal. a duplexer coupled to the transceiver for providing the third signal and the fourth signal to the transceiver and receiving the second signal, and the third signal and the fourth signal sharing a common reception between the duplexer and the transceiver path. The switch is coupled to the antenna and the duplexer for switching the plurality of signals in the first frequency band and the second frequency band. In addition, the filter is coupled to the first power amplifier, the duplexer and the switch for receiving the first signal, and filtering the circuit path connecting the filter to the first power amplifier, the duplexer and the switch. The noise, while the filter essentially only allows the first signal to pass.
基於上述,在本發明的上述實施例中,提供一種減少射頻電路面積的方法及使用此方法的通訊裝置,利用隔離裝置來隔離其他接收信號或發射信號,或利用濾波裝置過濾其他信號在一發射信號路徑中所產生之雜訊,以降低其他接收信號或發射信號對功率放大器的干擾。另外,還針對頻率重疊之至少兩個接收頻帶的信號使用共同的接收路徑,並據此減少元件的成本與整體射頻電路的空間。Based on the above, in the above embodiments of the present invention, a method for reducing the area of a radio frequency circuit and a communication device using the same are provided, wherein the isolation device is used to isolate other received signals or transmitted signals, or the filtering device is used to filter other signals in a transmission. Noise generated in the signal path to reduce interference from other received or transmitted signals to the power amplifier. In addition, a common receive path is also used for signals of at least two receive bands whose frequencies overlap, and the cost of the components and the space of the overall radio frequency circuit are reduced accordingly.
為讓本發明之上述特徵和優點能更明顯易懂,下文特舉實施例,並配合所附圖式作詳細說明如下。The above described features and advantages of the present invention will be more apparent from the following description.
現在將詳細參照所揭露之示範實施例,所述之示範實施例多繪示於附圖中,附帶一提的是,整個附圖中相同的參考標記用於表示相同或相似的元件。The present invention will be described in detail with reference to the exemplary embodiments of the invention.
圖1是根據本發明之一示範實施例所繪示一種適用於多頻帶操作之通訊裝置100的系統方塊圖。在圖1中,主要繪示通訊裝置100的射頻電路部份,而通訊裝置100適用於至少一第一頻帶(例如,WCDMA的Band 8)與至少一第二頻帶(例如,上述之表1所示的Band 1)。請參照圖1,通訊裝置100的射頻電路包括一天線模組110、一交換器120、一隔離器(isolator) 130、一雙工器(duplexer) 140、一第一功率放大器(Power Amplifier,PA) 152、一第二功率放大器154與一收發器(transceiver) 160。然而,本發明並不限定於上述,通訊裝置100還可以支援超過2個頻帶、多模或多種通訊協定標準。另外通訊裝置100還可以包括其他元件,例如處理器模組(未繪示)、記憶體模組(未繪示)、顯示模組(未繪示)與輸入模組(未繪示)。1 is a system block diagram of a communication device 100 suitable for multi-band operation, in accordance with an exemplary embodiment of the present invention. In FIG. 1, the RF circuit portion of the communication device 100 is mainly illustrated, and the communication device 100 is applicable to at least a first frequency band (for example, Band 8 of WCDMA) and at least a second frequency band (for example, Table 1 above). Show Band 1). Referring to FIG. 1 , the RF circuit of the communication device 100 includes an antenna module 110 , a switch 120 , an isolator 130 , a duplexer 140 , and a first power amplifier (Power Amplifier, PA). 152. A second power amplifier 154 and a transceiver 160. However, the present invention is not limited to the above, and the communication device 100 can support more than two frequency bands, multi-mode or multiple communication protocol standards. In addition, the communication device 100 may further include other components, such as a processor module (not shown), a memory module (not shown), a display module (not shown), and an input module (not shown).
請參照圖1,在本示範實施例中,收發器160用以提供第一頻帶的一第一信號與該第二頻帶的一第二信號,以及接收第一頻帶的第三信號與第二頻帶的第四信號,其中第三信號之頻率與第四信號之頻率重疊。在此值得一提的是,更精確地說,在分頻雙工模式下(簡稱為FDD),第一頻帶同時具有第一發射頻帶與第一接收頻帶,並且第二頻帶同時具有第二發射頻帶與第二接收頻帶。另外,第一信號之頻率屬於第一發射頻帶(例如:美國所使用的Band 4的發射頻帶,其頻率介於1710MHz~1755MHz之間),第二信號之頻率屬於第二發射頻帶(例如:美國所使用的Band 4的接收頻帶,其頻率介於2110MHz~2155MHz之間),第三信號之頻率屬於第一接收頻帶(例如:歐洲所使用的Band 1的發射頻帶,其頻率介於1920MHz~1980MHz之間),以及第四信號之頻率屬於第二接收頻帶(例如:歐洲所使用的Band 1的接收頻帶,其頻率介於2110MHz~2170MHz之間)。再者,通訊裝置100的射頻電路僅操作於一個頻帶,此即當通訊裝置100操作於第一頻帶時,通訊裝置100無法發射或接收第二頻帶的射頻信號。相反地,當通訊裝置100操作於第二頻帶時,通訊裝置100無法發射或接收第一頻帶的射頻信號。Referring to FIG. 1, in the exemplary embodiment, the transceiver 160 is configured to provide a first signal of the first frequency band and a second signal of the second frequency band, and receive the third signal and the second frequency band of the first frequency band. The fourth signal, wherein the frequency of the third signal overlaps with the frequency of the fourth signal. It is worth mentioning here that, more precisely, in the frequency division duplex mode (referred to as FDD for short), the first frequency band has both the first transmission band and the first reception band, and the second band has the second transmission at the same time. Band and second receive band. In addition, the frequency of the first signal belongs to the first transmission band (for example, the transmission band of Band 4 used in the United States, the frequency is between 1710 MHz and 1755 MHz), and the frequency of the second signal belongs to the second transmission band (for example: the United States) The receiving band of Band 4 used has a frequency between 2110MHz and 2155MHz. The frequency of the third signal belongs to the first receiving frequency band (for example, the transmitting band of Band 1 used in Europe, the frequency is between 1920MHz and 1980MHz. Between) and the frequency of the fourth signal belongs to the second receiving band (for example, the receiving band of Band 1 used in Europe, the frequency is between 2110 MHz and 2170 MHz). Moreover, the radio frequency circuit of the communication device 100 operates only in one frequency band, that is, when the communication device 100 operates in the first frequency band, the communication device 100 cannot transmit or receive the radio frequency signal of the second frequency band. Conversely, when the communication device 100 operates in the second frequency band, the communication device 100 cannot transmit or receive the radio frequency signal of the first frequency band.
請繼續參照圖1,隔離器130耦接於收發器,用以接收第一信號,以及隔離第二信號、第三信號與第四信號進入收發器。在此值得一提的是,隔離器130僅讓第一信號由第一功率放大器152傳送至交換器120,並且隔離第二信號、第三信號與第四信號,以避免這些信號進入(或耦合進入)第一功率放大器152或收發器160。雙工器140,耦接於收發器160,用以提供第三信號與第四信號給收發器160以及接收第二信號,而第三信號與第四信號共用雙工器140與收發器160之間的一共同接收路徑DRX。天線110,耦接於隔離器130與雙工器140,用以無線發射(wirelessly transmit)第一信號與第二信號,以及無線接收(wirelessly receive)第三信號與第四信號。交換器120耦接於天線110、隔離器130與雙工器140,用以切換第一頻帶與第二頻帶的多個信號。此即,當通訊裝置100操作於第一頻帶時,交換器120切換通訊裝置100之射頻電路路徑,以致於收發器160僅能發射第一信號與接收第三信號。相反地,當通訊裝置100操作於第二頻帶時,交換器120切換通訊裝置100之射頻電路路徑,以致於收發器160僅能發射第二信號與接收第四信號。Referring to FIG. 1 , the isolator 130 is coupled to the transceiver for receiving the first signal and isolating the second signal, the third signal, and the fourth signal into the transceiver. It is worth mentioning here that the isolator 130 only transmits the first signal from the first power amplifier 152 to the switch 120 and isolates the second signal, the third signal and the fourth signal to prevent these signals from entering (or coupling). Entering) a first power amplifier 152 or transceiver 160. The duplexer 140 is coupled to the transceiver 160 for providing the third signal and the fourth signal to the transceiver 160 and the second signal, and the third signal and the fourth signal share the duplexer 140 and the transceiver 160. A common receiving path DRX between. The antenna 110 is coupled to the isolator 130 and the duplexer 140 for wirelessly transmitting the first signal and the second signal, and wirelessly receiving the third signal and the fourth signal. The switch 120 is coupled to the antenna 110, the isolator 130, and the duplexer 140 for switching a plurality of signals of the first frequency band and the second frequency band. That is, when the communication device 100 operates in the first frequency band, the switch 120 switches the radio frequency circuit path of the communication device 100 such that the transceiver 160 can only transmit the first signal and receive the third signal. Conversely, when the communication device 100 is operating in the second frequency band, the switch 120 switches the RF circuit path of the communication device 100 such that the transceiver 160 can only transmit the second signal and receive the fourth signal.
請繼續參照圖1,第一功率放大器152耦接於收發器160與隔離器130,用以放大第一信號。另外,第二功率放大器154耦接於收發器160與雙工器140,用以放大第二信號。再者,通訊裝置100運作時,具有以下電路運作特徵。當通訊裝置100操作於第一頻帶時,第一信號透過隔離器130由收發器160傳送至天線110,並且第三信號透過雙工器140與共同接收路徑DRX由天線110傳送至收發器160。另外,當通訊裝置100操作於第二頻帶時,第二信號透過雙工器140由收發器160傳送至天線110,並且第四信號透過雙工器140與共同接收路徑DRX由天線110傳送至收發器160。Referring to FIG. 1 , the first power amplifier 152 is coupled to the transceiver 160 and the isolator 130 for amplifying the first signal. In addition, the second power amplifier 154 is coupled to the transceiver 160 and the duplexer 140 for amplifying the second signal. Moreover, when the communication device 100 operates, it has the following circuit operation features. When the communication device 100 operates in the first frequency band, the first signal is transmitted by the transceiver 160 to the antenna 110 through the isolator 130, and the third signal is transmitted from the antenna 110 to the transceiver 160 through the duplexer 140 and the common receiving path DRX. In addition, when the communication device 100 operates in the second frequency band, the second signal is transmitted from the transceiver 160 to the antenna 110 through the duplexer 140, and the fourth signal is transmitted from the antenna 110 to the transceiver through the duplexer 140 and the common receiving path DRX. 160.
圖2是根據本發明之另一示範實施例所繪示一種適用於多頻帶操作之通訊裝置200的系統方塊圖。請同時參照圖1與圖2,通訊裝置200大致上與通訊裝置100相類似,但是在通訊裝置200中,濾波器230取代通訊裝置100的隔離器130。另外,濾波器230耦接於第一功率放大器152、雙工器140與交換器120,用以接收第一信號,以及濾波在濾波器230與第一功率放大器152、雙工器140以及交換器120連接之電路路徑上的雜訊,其中濾波器230實質上僅允許第一信號通過。如此,可以降低第二信號、第三信號與第四信號的干擾,以避免這些信號進入(或耦合進入)第一功率放大器152或收發器160。2 is a system block diagram of a communication device 200 suitable for multi-band operation, in accordance with another exemplary embodiment of the present invention. Referring to FIG. 1 and FIG. 2 simultaneously, the communication device 200 is substantially similar to the communication device 100, but in the communication device 200, the filter 230 replaces the isolator 130 of the communication device 100. In addition, the filter 230 is coupled to the first power amplifier 152, the duplexer 140, and the switch 120 for receiving the first signal, and filtering the filter 230 with the first power amplifier 152, the duplexer 140, and the switch. The noise on the circuit path of 120 is connected, wherein the filter 230 substantially only allows the first signal to pass. As such, interference of the second, third, and fourth signals can be reduced to prevent these signals from entering (or coupling into) the first power amplifier 152 or transceiver 160.
圖3是根據本發明之一示範實施例所繪示一種減少射頻電路面積之方法300的流程圖。請同時參照圖1與圖3,此減少射頻電路面積之方法300包括以下步驟。在步驟S302中,利用一收發器160來提供第一頻帶的第一信號與第二頻帶的一第二信號,以及接收第一頻帶的第三信號與第二頻帶的第四信號,而第三信號之頻率與第四信號之頻率重疊。在步驟S304中,利用一隔離器130來接收第一信號以及隔離第二信號、第三信號與第四信號進入上述之收發器160。在步驟S306中,透過一雙工器140來提供第三信號與第四信號給收發器160以及接收第二信號,而第三信號與第四信號共用上述之雙工器140與收發器160之間的一共同接收路徑DRX。在步驟S308中,透過耦接於天線110、隔離器130與雙工器140的一交換器120來切換第一頻帶與第二頻帶的多個信號。3 is a flow chart of a method 300 of reducing the area of a radio frequency circuit, in accordance with an exemplary embodiment of the present invention. Referring to FIG. 1 and FIG. 3 simultaneously, the method 300 for reducing the RF circuit area includes the following steps. In step S302, a transceiver 160 is used to provide a first signal of the first frequency band and a second signal of the second frequency band, and a third signal of the first frequency band and a fourth signal of the second frequency band, and a third signal. The frequency of the signal overlaps with the frequency of the fourth signal. In step S304, an isolator 130 is used to receive the first signal and to isolate the second signal, the third signal, and the fourth signal into the transceiver 160. In step S306, the third signal and the fourth signal are supplied to the transceiver 160 and the second signal is transmitted through a duplexer 140, and the third signal and the fourth signal share the duplexer 140 and the transceiver 160. A common receiving path DRX between. In step S308, a plurality of signals of the first frequency band and the second frequency band are switched by a switch 120 coupled to the antenna 110, the isolator 130, and the duplexer 140.
在步驟S310中,利用耦接於隔離器130與雙工器140的天線110來無線發射第一信號與第二信號,以及無線接收第三信號與第四信號。在步驟S312中,判斷目前通訊裝置100操作於第一頻帶或第二頻帶,若是目前通訊裝置100操作於第一頻帶,則繼續進行步驟S314。相反地,若是通訊裝置100操作於第二頻帶,則繼續進行步驟S316。在步驟S314中,當通訊裝置100操作於第一頻帶時,透過隔離器130將第一信號由收發器160傳送至天線110,並且透過雙工器140與共同接收路徑DRX將第三信號由天線110傳送至收發器160。在步驟S316中,當通訊裝置100操作於第二頻帶時,透過雙工器140將第二信號由收發器160傳送至天線110,並且透過雙工器140與共同接收路徑DRX將第四信號由天線110傳送至收發器160。在步驟S314或步驟S316之後,減少射頻電路面積之方法300到此結束。In step S310, the first signal and the second signal are wirelessly transmitted by using the antenna 110 coupled to the isolator 130 and the duplexer 140, and the third signal and the fourth signal are wirelessly received. In step S312, it is determined that the current communication device 100 is operating in the first frequency band or the second frequency band. If the communication device 100 is currently operating in the first frequency band, the process proceeds to step S314. Conversely, if the communication device 100 is operating in the second frequency band, the process proceeds to step S316. In step S314, when the communication device 100 operates in the first frequency band, the first signal is transmitted from the transceiver 160 to the antenna 110 through the isolator 130, and the third signal is transmitted from the antenna through the duplexer 140 and the common receiving path DRX. 110 is transmitted to transceiver 160. In step S316, when the communication device 100 operates in the second frequency band, the second signal is transmitted from the transceiver 160 to the antenna 110 through the duplexer 140, and the fourth signal is transmitted through the duplexer 140 and the common receiving path DRX. Antenna 110 is transmitted to transceiver 160. After step S314 or step S316, the method 300 of reducing the area of the radio frequency circuit ends here.
圖4是根據本發明之另一示範實施例所繪示一種減少射頻電路面積之方法400的流程圖。請同時參照圖2與圖4,此減少射頻電路面積之方法400包括以下步驟。在步驟S402中,利用收發器160來提供第一頻帶的第一信號與第二頻帶的一第二信號,以及接收第一頻帶的第三信號與第二頻帶的第四信號,而第三信號之頻率與第四信號之頻率重疊。在步驟S404中,利用耦接於收發器160的第一功率放大器152來放大第一信號。在步驟S406中,透過耦接於收發器160的雙工器140來提供第三信號與第四信號給收發器160以及接收第二信號,而第三信號與第四信號共用雙工器140與收發器160之間的一共同接收路徑DRX。在步驟S408中,利用耦接於天線110與雙工器140的交換器120來切換第一頻帶與第二頻帶的多個信號。4 is a flow chart of a method 400 of reducing the area of a radio frequency circuit in accordance with another exemplary embodiment of the present invention. Referring to FIG. 2 and FIG. 4 simultaneously, the method 400 for reducing the RF circuit area includes the following steps. In step S402, the first signal of the first frequency band and a second signal of the second frequency band are provided by the transceiver 160, and the third signal of the first frequency band and the fourth signal of the second frequency band are received, and the third signal is received. The frequency overlaps with the frequency of the fourth signal. In step S404, the first signal is amplified using a first power amplifier 152 coupled to the transceiver 160. In step S406, the third signal and the fourth signal are supplied to the transceiver 160 and the second signal is received through the duplexer 140 coupled to the transceiver 160, and the third signal and the fourth signal share the duplexer 140 and A common receive path DRX between transceivers 160. In step S408, a plurality of signals of the first frequency band and the second frequency band are switched by the switch 120 coupled to the antenna 110 and the duplexer 140.
在步驟S410中,利用耦接於第一功率放大器154、雙工器140與交換器120的濾波器230來接收第一信號,以及濾波在濾波器230與第一功率放大器152、雙工器140與交換器120連接之電路路徑上的雜訊。在步驟S412中,判斷目前通訊裝置100操作於第一頻帶或第二頻帶。步驟S412至步驟S416大致上與圖3中的步驟S312至步驟S316相同,故在此不詳述其細節。在步驟S414或步驟S416之後,減少射頻電路面積之方法400到此結束。In step S410, the first signal is received by the filter 230 coupled to the first power amplifier 154, the duplexer 140, and the switch 120, and filtered in the filter 230 and the first power amplifier 152, the duplexer 140. The noise on the circuit path connected to the switch 120. In step S412, it is determined that the communication device 100 is currently operating in the first frequency band or the second frequency band. Steps S412 to S416 are substantially the same as steps S312 to S316 in FIG. 3, and thus details thereof will not be described in detail herein. After step S414 or step S416, the method 400 of reducing the area of the radio frequency circuit ends here.
圖5是根據本發明之另一示範實施例所繪示一種適用於多頻帶操作之通訊裝置500的系統方塊圖。通訊裝置500大致上與通訊裝置100或通訊裝置200相類似,不過在通訊裝置500中,通訊裝置500還包括另一模組以傳送或接收第三頻道(例如,WCDMA的Band 2)的第五信號與第六信號,而第五信號之頻率屬於第三頻道之第三發射頻道(例如,介於1850MHz~1910MHz之間),而第六信號之頻率屬於第三頻道之第三接收頻道(例如,介於1930MHz~1990MHz之間)。另外通訊裝置500利用一第三功率放大器156耦接至收發器150,用以放大第五信號,並且透過另一雙工器142耦接至交換器120,將第五信號傳送至天線110。FIG. 5 is a system block diagram of a communication device 500 suitable for multi-band operation, in accordance with another exemplary embodiment of the present invention. The communication device 500 is substantially similar to the communication device 100 or the communication device 200, but in the communication device 500, the communication device 500 further includes another module to transmit or receive a fifth channel (for example, Band 2 of WCDMA). The signal and the sixth signal, and the frequency of the fifth signal belongs to the third transmission channel of the third channel (for example, between 1850 MHz and 1910 MHz), and the frequency of the sixth signal belongs to the third receiving channel of the third channel (for example , between 1930MHz and 1990MHz). In addition, the communication device 500 is coupled to the transceiver 150 by a third power amplifier 156 for amplifying the fifth signal, and coupled to the switch 120 through another duplexer 142 to transmit the fifth signal to the antenna 110.
另一方面,通訊裝置500的收發器150,透過交換器120、雙工器142與一單一接收路徑SRX,接收由天線110所接收的第六信號。在此值得一提的是,隔離器130、雙工器140與雙工器142耦接在一起,但隔離器130在通訊裝置500於第一頻帶中操作時,隔離第二信號、第三信號、第四信號、第五信號與第六信號進入第一功率放大器152中。然而本發明並不限定於上述,本發明所提供之通訊裝置還可以於3個以上的頻帶中操作。另外,在本發明之其他示範實施例中,通訊裝置還可以將隔離器替換為濾波器,以防止其他射頻信號進入第一頻帶之發射信號的功率放大電路路徑。On the other hand, the transceiver 150 of the communication device 500 receives the sixth signal received by the antenna 110 through the switch 120, the duplexer 142, and a single receiving path SRX. It is worth mentioning that the isolator 130, the duplexer 140 and the duplexer 142 are coupled together, but the isolator 130 isolates the second signal and the third signal when the communication device 500 operates in the first frequency band. The fourth signal, the fifth signal, and the sixth signal enter the first power amplifier 152. However, the present invention is not limited to the above, and the communication device provided by the present invention can also operate in three or more frequency bands. Additionally, in other exemplary embodiments of the present invention, the communication device may also replace the isolator with a filter to prevent other radio frequency signals from entering the power amplifying circuit path of the transmitted signal of the first frequency band.
綜上所述,在本發明之多個示範實施例中,提供一種減少射頻電路面積的方法及使用此方法的通訊裝置,利用隔離裝置或濾波裝置來減少其他接收信號或發射信號對功率放大器的干擾。另外,頻率重疊之至少兩個接收頻帶的信號則使用共同的接收路徑,並據此減少元件的成本與整體射頻電路的空間。In summary, in various exemplary embodiments of the present invention, a method for reducing an RF circuit area and a communication device using the same are provided, and an isolation device or a filtering device is used to reduce other received signals or transmitted signals to a power amplifier. interference. In addition, signals of at least two of the received frequency bands that overlap in frequency use a common receive path and thereby reduce the cost of the component and the space of the overall RF circuit.
雖然本發明已以實施例揭露如上,然其並非用以限定本發明,任何所屬技術領域中具有通常知識者,在不脫離本發明之精神和範圍內,當可作些許之更動與潤飾,故本發明之保護範圍當視後附之申請專利範圍所界定者為準。Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.
100、200、500‧‧‧通訊裝置100, 200, 500‧‧‧ communication devices
110‧‧‧天線模組110‧‧‧Antenna module
120‧‧‧交換器120‧‧‧Switch
130‧‧‧隔離器130‧‧‧Isolator
140、142‧‧‧雙工器140, 142‧‧‧ duplexer
152‧‧‧第一功率放大器152‧‧‧First power amplifier
154‧‧‧第二功率放大器154‧‧‧second power amplifier
156‧‧‧第三功率放大器156‧‧‧ Third Power Amplifier
160‧‧‧收發器160‧‧‧ transceiver
230‧‧‧濾波器230‧‧‧ filter
300、400‧‧‧減少射頻電路面積之方法300, 400‧‧‧Methods for reducing the area of RF circuits
S302~S316、S402~S416‧‧‧步驟S302~S316, S402~S416‧‧‧ steps
DRX‧‧‧共同接收路徑DRX‧‧‧Common receiving path
SRX‧‧‧單一接收路徑SRX‧‧‧ single receiving path
圖1是根據本發明之一示範實施例所繪示一種適用於多頻帶操作之通訊裝置的系統方塊圖。1 is a system block diagram of a communication device suitable for multi-band operation, in accordance with an exemplary embodiment of the present invention.
圖2是根據本發明之另一示範實施例所繪示一種適用於多頻帶操作之通訊裝置的系統方塊圖。2 is a system block diagram of a communication device suitable for multi-band operation, in accordance with another exemplary embodiment of the present invention.
圖3是根據本發明之一示範實施例所繪示一種減少射頻電路面積之方法的流程圖。FIG. 3 is a flow chart showing a method of reducing the area of a radio frequency circuit according to an exemplary embodiment of the invention.
圖4是根據本發明之另一示範實施例所繪示一種減少射頻電路面積之方法的流程圖。4 is a flow chart showing a method of reducing the area of a radio frequency circuit according to another exemplary embodiment of the present invention.
圖5是根據本發明之另一示範實施例所繪示一種適用於多頻帶操作之通訊裝置的系統方塊圖。FIG. 5 is a system block diagram of a communication device suitable for multi-band operation according to another exemplary embodiment of the present invention.
S302~S316...步驟S302~S316. . . step
Claims (10)
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TW99106965A TWI423599B (en) | 2010-03-10 | 2010-03-10 | Method for reducing rf circuit area and communication apparatus using the same |
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TW99106965A TWI423599B (en) | 2010-03-10 | 2010-03-10 | Method for reducing rf circuit area and communication apparatus using the same |
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TWI423599B true TWI423599B (en) | 2014-01-11 |
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Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US6472952B1 (en) * | 1998-11-10 | 2002-10-29 | Matsushita Electric Industrial Co., Ltd. | Antenna duplexer circuit with a phase shifter on the receive side |
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Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6472952B1 (en) * | 1998-11-10 | 2002-10-29 | Matsushita Electric Industrial Co., Ltd. | Antenna duplexer circuit with a phase shifter on the receive side |
Non-Patent Citations (1)
Title |
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Youtson Cheung, " 聲表面波濾波器在無線通信領域的應用", 無線電技術月刊,第382期,2005年4月。 圖4 * |
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