TWI810037B - Surface acoustic wave multiplexer - Google Patents
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一種通訊技術領域，特別是涉及一種表面聲波多工器。A technical field of communication, in particular to a surface acoustic wave multiplexer.
隨著科技的進步，無線通訊技術愈來愈受重視，第四代行動通訊技術長期演進技術(4th Generation Long Term Evolution, 4G LTE)，第五代行動通訊技術(5th generation mobile networks, 5G)、載波聚合(Carrier Aggregation, CA)等通訊技術，其功能是可將多個頻道分配給同一用戶，當分配給用戶的頻道越多，則數據傳輸速率就越高。With the advancement of science and technology, wireless communication technology is getting more and more attention. The fourth generation mobile communication technology long-term evolution technology (4th Generation Long Term Evolution, 4G LTE), the fifth generation mobile communication technology (5th generation mobile networks, 5G), Communication technologies such as Carrier Aggregation (CA) have the function of allocating multiple channels to the same user, and the more channels are allocated to the user, the higher the data transmission rate will be.
為配合載波聚合技術，逐漸發展以表面聲波元件作為應用於行動裝置之無線通訊元件，其須以表面聲波多工器(Surface Acoustic Wave Multiplexer)，例如:四工器(Quadplexer)或六工器(Hexaplexer)，在現有的表面聲波多工器設計中，為了達到上述條件，多工器中的每一濾波器與天線端之間都要加上匹配電路(Matching Circuits)，其中，匹配電路可能是由電感、電容等被動元件組成，或是傳輸線等阻抗轉換裝置，倘若載波聚合使用頻道越多則所需的阻抗匹配電路元件就會越多，對於行動通訊裝置將會是一個沉重的負擔。In order to cooperate with carrier aggregation technology, surface acoustic wave components are gradually developed as wireless communication components for mobile devices, which must use surface acoustic wave multiplexers (Surface Acoustic Wave Multiplexer), such as: quadplexer (Quadplexer) or hexaplexer ( Hexaplexer), in the existing surface acoustic wave multiplexer design, in order to achieve the above conditions, a matching circuit (Matching Circuits) must be added between each filter in the multiplexer and the antenna end, wherein the matching circuit may be Composed of passive components such as inductors and capacitors, or impedance conversion devices such as transmission lines, if the carrier aggregation uses more channels, the more impedance matching circuit components will be required, which will be a heavy burden on mobile communication devices.
為此，本發明提供一種表面聲波多工器，其架構僅需一個外部串接電感，即可達成前述所需之條件，有效地降低多工器的匹配電路數量及匹配電路元件複雜度。Therefore, the present invention provides a surface acoustic wave multiplexer whose structure only requires an external series inductor to achieve the above-mentioned required conditions, effectively reducing the number of matching circuits and the complexity of matching circuit components of the multiplexer.
本發明之主要目的，係提供一種表面聲波多工器，透過簡易的匹配電路結合表面聲波濾波器，使得各個濾波器於本身頻道時，其阻抗接近匹配條件，並於其他頻道時，其阻抗接近開路條件。The main purpose of the present invention is to provide a surface acoustic wave multiplexer, which combines the surface acoustic wave filter through a simple matching circuit, so that the impedance of each filter is close to the matching condition when it is in its own channel, and its impedance is close to the matching condition in other channels. open circuit condition.
為了達到上述之目的，本發明之一實施例係揭示表面聲波多工器，包含: 一第一表面聲波濾波器，其一端與一天線端訊號連接，且，另一端與對應之一第一頻道發射端訊號連接；一第二表面聲波濾波器，其一端與對應之一第一頻道接收端訊號連接；及一匹配電路，其一端與該天線端訊號連接，且，另一端與該第二表面聲波濾波器訊號連接。In order to achieve the above object, one embodiment of the present invention discloses a surface acoustic wave multiplexer, comprising: a first surface acoustic wave filter, one end of which is connected to an antenna end signal, and the other end is connected to a corresponding first channel A signal connection at the transmitting end; a second surface acoustic wave filter, one end of which is connected to a signal at the receiving end of a corresponding first channel; and a matching circuit, one end of which is connected to the signal of the antenna end, and the other end is connected to the second surface Sonic filter signal connection.
於較佳實施例中，當該第一表面聲波濾波器於對應之頻道時，其對應之反射係數趨近於0，且，該第二表面聲波濾波器對應之反射係數趨近於1，或當該第二表面聲波濾波器於對應之頻道時，其對應之反射係數趨近於0，且，該第一表面聲波濾波器對應之反射係數趨近於1。In a preferred embodiment, when the first surface acoustic wave filter is in the corresponding channel, its corresponding reflection coefficient approaches 0, and the corresponding reflection coefficient of the second surface acoustic wave filter approaches 1, or When the second surface acoustic wave filter is in the corresponding channel, its corresponding reflection coefficient is close to 0, and the corresponding reflection coefficient of the first surface acoustic wave filter is close to 1.
於較佳實施例中，該匹配電路為一電感元件。In a preferred embodiment, the matching circuit is an inductance element.
於較佳實施例中，該電感元件之電感值為3nH-7nH。 為了達到上述之主要目的，本發明之一實施例係揭示一種表面聲波濾波器，包含: 一第一表面聲波濾波器，其一端與一天線端訊號連接，且，另一端與對應之一第一頻道發射端訊號連接；一第二表面聲波濾波器，其一端與一天線端訊號連接，且，另一端與對應之一第一頻道接收端訊號連接；一第三表面聲波濾波器，其一端與該天線端訊號連接，且，另一端與對應之一第二頻道發射端訊號連接； 一第四表面聲波濾波器，其一端與對應之一第二頻道接收端訊號連接；及一匹配電路，其一端與該天線端訊號連接，且，另一端與該第四表面聲波濾波器訊號連接。 In a preferred embodiment, the inductance of the inductance element is 3nH-7nH. In order to achieve the above-mentioned main purpose, one embodiment of the present invention discloses a surface acoustic wave filter, comprising: a first surface acoustic wave filter, one end of which is connected to an antenna end signal, and the other end is connected to a corresponding first A channel transmitter signal connection; a second surface acoustic wave filter, one end of which is connected to an antenna end signal, and the other end is connected to a corresponding first channel receiver signal; a third surface acoustic wave filter, one end of which is connected to an antenna end signal The antenna terminal is signal-connected, and the other end is connected to a corresponding second channel transmitter signal; a fourth surface acoustic wave filter, one end of which is connected to a corresponding second channel receiving terminal signal; and a matching circuit, whose One end is signal-connected to the antenna end, and the other end is signal-connected to the fourth surface acoustic wave filter.
於較佳實施例中，當該第一表面聲波濾波器於對應之頻道時，其對應之反射係數趨近於0，且，該第二表面聲波濾波器、該第三表面聲波濾波器及該第四表面聲波濾波器對應之反射係數趨近於1，或當該第二表面聲波濾波器於對應之頻道時，其對應之反射係數趨近於0，且，該第一表面聲波濾波器、該第三表面聲波濾波器及該第四表面聲波濾波器對應之反射係數趨近於1，或當該第三表面聲波濾波器於對應之頻道時，其對應之反射係數趨近於0，且，該第一表面聲波濾波器、該第二表面聲波濾波器及該第四表面聲波濾波器對應之反射係數趨近於1，或當該第四表面聲波濾波器於對應之頻道時，其對應之反射係數趨近於0，且，該第一表面聲波濾波器、該第二表面聲波濾波器及該第三表面聲波濾波器對應之反射係數趨近於1。In a preferred embodiment, when the first surface acoustic wave filter is in the corresponding channel, its corresponding reflection coefficient is close to 0, and the second surface acoustic wave filter, the third surface acoustic wave filter and the The reflection coefficient corresponding to the fourth surface acoustic wave filter approaches 1, or when the second surface acoustic wave filter is in the corresponding channel, the corresponding reflection coefficient approaches 0, and the first surface acoustic wave filter, The corresponding reflection coefficients of the third surface acoustic wave filter and the fourth surface acoustic wave filter are close to 1, or when the third surface acoustic wave filter is in the corresponding channel, the corresponding reflection coefficients are close to 0, and , the corresponding reflection coefficients of the first surface acoustic wave filter, the second surface acoustic wave filter and the fourth surface acoustic wave filter are close to 1, or when the fourth surface acoustic wave filter is in the corresponding channel, its corresponding The reflection coefficient of the first surface acoustic wave filter, the second surface acoustic wave filter and the third surface acoustic wave filter correspond to a reflection coefficient close to 1.
於較佳實施例中，該匹配電路為一電感元件，且，該電感元件之電感值為3nH-7nH。In a preferred embodiment, the matching circuit is an inductance element, and the inductance of the inductance element is 3nH-7nH.
為了達到上述之主要目的，本發明之一實施例係揭示一種表面聲波濾波器，包含: 一第一表面聲波濾波器，其一端與一天線端訊號連接，且，另一端與對應之一第一頻道發射端訊號連接；一第二表面聲波濾波器，其一端與對應之一第一頻道接收端訊號連接；一第三表面聲波濾波器，其一端與該天線端訊號連接，且，另一端與對應之一第二頻道發射端訊號連接； 一第四表面聲波濾波器，其一端與該天線端訊號連接，且，另一端與對應之一第二頻道接收端訊號連接；一第五表面聲波濾波器，其一端與該天線端訊號連接，且，另一端與對應之一第三頻道發射端訊號連接； 一第六表面聲波濾波器，其一端與該天線端訊號連接，且，另一端與對應之一第三頻道接收端訊號連接；及一匹配電路，其一端與該天線端訊號連接，且，另一端與該第二表面聲波濾波器訊號連接。In order to achieve the above-mentioned main purpose, one embodiment of the present invention discloses a surface acoustic wave filter, comprising: a first surface acoustic wave filter, one end of which is connected to an antenna end signal, and the other end is connected to a corresponding first A channel transmitter signal connection; a second surface acoustic wave filter, one end of which is connected to a corresponding first channel receiver signal; a third surface acoustic wave filter, one end of which is connected to the antenna end signal, and the other end is connected to the antenna end signal A corresponding second channel transmitter signal connection; a fourth surface acoustic wave filter, one end of which is connected to the antenna terminal signal, and the other end is connected to a corresponding second channel receiver signal; a fifth surface acoustic wave filter A device, one end of which is connected to the antenna end, and the other end is connected to a corresponding third channel transmitter; a sixth surface acoustic wave filter, one end of which is connected to the antenna end, and the other end is connected to the corresponding a third channel receiving terminal signal connection; and a matching circuit, one end of which is connected to the antenna terminal signal, and the other end is connected to the second surface acoustic wave filter signal.
於較佳實施例中，當該第一表面聲波濾波器於對應之頻道時，其對應之反射係數趨近於0，且，該第二表面聲波濾波器、該第三表面聲波濾波器、該第四表面聲波濾波器、該第五表面聲波濾波器及該第六表面聲波濾波器對應之反射係數趨近於1，或當該第二表面聲波濾波器於對應之頻道時，其對應之反射係數趨近於0，且，該第一表面聲波濾波器、該第三表面聲波濾波器、該第四表面聲波濾波器、該第五表面聲波濾波器及該第六表面聲波濾波器對應之反射係數趨近於1，或當該第三表面聲波濾波器於對應之頻道時，其對應之反射係數趨近於0，且，該第一表面聲波濾波器、該第二表面聲波濾波器、該第四表面聲波濾波器、該第五表面聲波濾波器及該第六表面聲波濾波器對應之反射係數趨近於1，或當該第四表面聲波濾波器於對應之頻道時，其對應之反射係數趨近於0，且，該第一表面聲波濾波器、該第二表面聲波濾波器、該第三表面聲波濾波器、該第五表面聲波濾波器及該第六表面聲波濾波器對應之反射係數趨近於1，或當該第五表面聲波濾波器於對應之頻道時，其對應之反射係數趨近於0，且，該第一表面聲波濾波器、該第二表面聲波濾波器、該第三表面聲波濾波器、該第四表面聲波濾波器及該第六表面聲波濾波器對應之反射係數趨近於1，或當該第六表面聲波濾波器於對應之頻道時，其對應之反射係數趨近於0，且，該第一表面聲波濾波器、該第二表面聲波濾波器、該第三表面聲波濾波器、該第四表面聲波濾波器及該第五表面聲波濾波器對應之反射係數趨近於1。In a preferred embodiment, when the first surface acoustic wave filter is in the corresponding channel, its corresponding reflection coefficient is close to 0, and the second surface acoustic wave filter, the third surface acoustic wave filter, the The corresponding reflection coefficients of the fourth surface acoustic wave filter, the fifth surface acoustic wave filter and the sixth surface acoustic wave filter are close to 1, or when the second surface acoustic wave filter is in the corresponding channel, the corresponding reflection The coefficient is close to 0, and the reflections corresponding to the first SAW filter, the third SAW filter, the fourth SAW filter, the fifth SAW filter and the sixth SAW filter The coefficient tends to 1, or when the third surface acoustic wave filter is in the corresponding channel, its corresponding reflection coefficient tends to 0, and the first surface acoustic wave filter, the second surface acoustic wave filter, the The corresponding reflection coefficients of the fourth surface acoustic wave filter, the fifth surface acoustic wave filter and the sixth surface acoustic wave filter are close to 1, or when the fourth surface acoustic wave filter is in the corresponding channel, the corresponding reflection The coefficient is close to 0, and the reflections corresponding to the first SAW filter, the second SAW filter, the third SAW filter, the fifth SAW filter and the sixth SAW filter The coefficient tends to 1, or when the fifth surface acoustic wave filter is in the corresponding channel, its corresponding reflection coefficient tends to 0, and the first surface acoustic wave filter, the second surface acoustic wave filter, the The corresponding reflection coefficients of the third surface acoustic wave filter, the fourth surface acoustic wave filter and the sixth surface acoustic wave filter are close to 1, or when the sixth surface acoustic wave filter is in the corresponding channel, the corresponding reflection The coefficient is close to 0, and the reflections corresponding to the first SAW filter, the second SAW filter, the third SAW filter, the fourth SAW filter and the fifth SAW filter The coefficient is close to 1.
於較佳實施例中，該匹配電路為一電感元件，且，該電感元件之電感值為3nH-7nH。In a preferred embodiment, the matching circuit is an inductance element, and the inductance of the inductance element is 3nH-7nH.
本發明之有益功效在於解決多工器的匹配電路元件複雜度。The beneficial effect of the invention is to solve the complexity of the matching circuit elements of the multiplexer.
為讓本發明上述及/或其他目的、功效、特徵更明顯易懂，下文特舉較佳實施方式，作詳細說明於下：In order to make the above and/or other purposes, effects, and features of the present invention more obvious and understandable, the preferred implementation modes are specifically cited below, which are described in detail below:
請參閱第一圖，其為本發明之一實施例之表面聲波多工器示意圖。如圖所示，本發明之表面聲波多工器M，包含: 第一表面聲波濾波器S1、第二表面聲波濾波器S2及匹配電路C，並詳細說明如下:Please refer to the first figure, which is a schematic diagram of a surface acoustic wave multiplexer according to an embodiment of the present invention. As shown in the figure, the surface acoustic wave multiplexer M of the present invention includes: a first surface acoustic wave filter S1, a second surface acoustic wave filter S2 and a matching circuit C, and the details are as follows:
第一表面聲波濾波器S1及第二表面聲波濾波器S2皆以多個共振器組成，且，共振器之數量可依據需求進行設置，每一共振器之間以串或/及並聯連接，於一實施例中，共振器係以多個反射柵欄結合換能裝置所組成，每一反射柵欄由多個金屬件組成，金屬件數量同樣可依據需求進行設置，且，每一金屬件的寬度比可為相同或不同，寬度比之範圍為0.4-0.6，但不在此限。Both the first surface acoustic wave filter S1 and the second surface acoustic wave filter S2 are composed of a plurality of resonators, and the number of resonators can be set according to requirements, and each resonator is connected in series or/and in parallel. In one embodiment, the resonator is composed of a plurality of reflective barriers combined with a transducing device. Each reflective barrier is composed of a plurality of metal parts. The number of metal parts can also be set according to requirements, and the width ratio of each metal part is They can be the same or different, and the width ratio ranges from 0.4 to 0.6, but not limited thereto.
當反射柵欄的週期不等於換能裝置的週期時，則反射柵欄為調變式反射柵欄，反之，當反射柵欄的週期等於換能裝置的週期時，則反射柵欄為同步式反射柵欄，於一實施例中，該些個反射柵欄可為調變式反射柵欄或/及同步式反射柵欄，但不在此限。When the period of the reflective barrier is not equal to the period of the transducing device, the reflective barrier is a modulating reflective barrier. On the contrary, when the period of the reflective barrier is equal to the period of the transducing device, the reflective barrier is a synchronous reflective barrier. In an embodiment, the reflective barriers may be modulating reflective barriers or/and synchronous reflective barriers, but not limited thereto.
於一實施例中，換能裝置會設置於兩個反射柵欄之間，其中，換能裝置接收聲音訊號，以逆壓電效應將聲音訊號進行轉換產生聲波，並由換能裝置傳遞至兩側反射柵欄共振後，形成反射聲波回傳至換能裝置，最後以正壓電效應將反射聲波轉換並輸出電訊號。In one embodiment, the transducer device is placed between two reflective fences, wherein the transducer device receives the sound signal, converts the sound signal by the inverse piezoelectric effect to generate sound waves, and is transmitted to both sides by the transducer device After the reflection fence resonates, a reflected sound wave is formed and transmitted back to the transducer device, and finally the reflected sound wave is converted by the positive piezoelectric effect and output as an electrical signal.
其中，週期設計可採用演算法、預設頻率及預設頻寬進行運算，於一實施例中，演算法可為步階函數、柴比雪夫(Chebyshev)函數、開氏貝索視窗加權函數(Kaiser-Bessel window)或漢明窗(Hamming window)其中一種，於一實施例中，當反射柵欄為調變式反射柵欄時，換能裝置之週期與反射柵欄之週期之比例值範圍為0.985-0.995，但不在此限。Wherein, the period design can be calculated by using an algorithm, a preset frequency and a preset bandwidth. In one embodiment, the algorithm can be a step function, a Chebyshev function, a Kaiser-Besso window weighting function ( Kaiser-Bessel window) or Hamming window (Hamming window), in one embodiment, when the reflective barrier is a modulating reflective barrier, the ratio of the period of the transducer device to the period of the reflective barrier ranges from 0.985- 0.995, but not limited thereto.
請參閱第二A圖，其為本發明之一實施例之表面聲波濾波器示意圖。如圖所示，以十三個共振器形成表面聲波濾波器SA，其配置為第一共振器R1與第二共振器R2串聯，第三共振器R3與第四共振器R4並聯，且，第二共振器R2之一端與第三共振器R3及第四共振器R4串聯，第五共振器R5之一端與第三共振器R3及第四共振器R4串聯，第五共振器R5與第六共振器R6串聯，第七共振器R7與第八共振器R8並聯，且，第六共振器R6與第七共振器R7及第八共振器R8串聯，第九共振器R9之一端與第七共振器R7及第八共振器R8串聯，第九共振器R9與第十共振器R10串聯，第十一共振器R11與第十二共振器R12並聯，且，第十共振器R10之一端與第十一共振器R11及第十二共振器R12串聯，第十三共振器R13之一端與第十一共振器R11及第十二共振器R12串聯，但不在此限。Please refer to Figure 2 A, which is a schematic diagram of a surface acoustic wave filter according to an embodiment of the present invention. As shown in the figure, the surface acoustic wave filter SA is formed by thirteen resonators, which are configured such that the first resonator R1 is connected in series with the second resonator R2, the third resonator R3 is connected in parallel with the fourth resonator R4, and the first resonator R1 is connected in series with the fourth resonator R4. One end of the second resonator R2 is connected in series with the third resonator R3 and the fourth resonator R4, one end of the fifth resonator R5 is connected in series with the third resonator R3 and the fourth resonator R4, and the fifth resonator R5 and the sixth resonator R6 is connected in series, the seventh resonator R7 is connected in parallel with the eighth resonator R8, and the sixth resonator R6 is connected in series with the seventh resonator R7 and the eighth resonator R8, one end of the ninth resonator R9 is connected to the seventh resonator R7 and the eighth resonator R8 are connected in series, the ninth resonator R9 is connected in series with the tenth resonator R10, the eleventh resonator R11 is connected in parallel with the twelfth resonator R12, and one end of the tenth resonator R10 is connected to the eleventh resonator R10. The resonator R11 and the twelfth resonator R12 are connected in series, and one end of the thirteenth resonator R13 is connected in series with the eleventh resonator R11 and the twelfth resonator R12 , but not limited thereto.
又參閱第二B圖，其為本發明之另一實施例之表面聲波濾波器示意圖。如圖所示，以十三個共振器形成表面聲波濾波器SA，其配置為第三共振器R3與第四共振器R4並聯，且，第二共振器R2之一端與第三共振器R3及第四共振器R4串聯，以及第一共振器R1與第二共振器R2、第三共振器R3及第四共振器R4並聯，第五共振器R5之一端與第三共振器R3及第四共振器R4串聯，第五共振器R5與第六共振器R6串聯，第七共振器R7與第八共振器R8並聯，且，第六共振器R6與第七共振器R7及第八共振器R8串聯，第九共振器R9之一端與第七共振器R7及第八共振器R8串聯，第九共振器R9與第十共振器R10串聯，第十一共振器R11與第十二共振器R12並聯，且，第十共振器R10之一端與第十一共振器R11及第十二共振器R12串聯，第十三共振器R13之一端與第十一共振器R11及第十二共振器R12串聯，但不在此限。Also refer to Figure 2 B, which is a schematic diagram of a surface acoustic wave filter according to another embodiment of the present invention. As shown in the figure, the surface acoustic wave filter SA is formed by thirteen resonators, and it is arranged such that the third resonator R3 and the fourth resonator R4 are connected in parallel, and one end of the second resonator R2 is connected to the third resonator R3 and the third resonator R3. The fourth resonator R4 is connected in series, and the first resonator R1 is connected in parallel with the second resonator R2, the third resonator R3 and the fourth resonator R4, and one end of the fifth resonator R5 resonates with the third resonator R3 and the fourth resonator R4 is connected in series, the fifth resonator R5 is connected in series with the sixth resonator R6, the seventh resonator R7 is connected in parallel with the eighth resonator R8, and the sixth resonator R6 is connected in series with the seventh resonator R7 and the eighth resonator R8 , one end of the ninth resonator R9 is connected in series with the seventh resonator R7 and the eighth resonator R8, the ninth resonator R9 is connected in series with the tenth resonator R10, the eleventh resonator R11 is connected in parallel with the twelfth resonator R12, Moreover, one end of the tenth resonator R10 is connected in series with the eleventh resonator R11 and the twelfth resonator R12, and one end of the thirteenth resonator R13 is connected in series with the eleventh resonator R11 and the twelfth resonator R12, but Not limited to this.
於一實施例中，第一表面聲波濾波器S1之一端係與對應之第一頻道發射端Tx1訊號連接，且，第二表面聲波濾波器S2之一端與對應之第一頻道接收端Rx1訊號連接，而另一端係與匹配電路C訊號連接，其中，匹配電路C之一端係與天線端AP訊號連接，且，匹配電路C為一個電感元件，且，其電感元件之電感值為3nH-7nH，為此，僅需要一個電感即可達成多工器匹配之需求，大幅降低結構複雜度。In one embodiment, one end of the first surface acoustic wave filter S1 is signal-connected to the corresponding first channel transmitting end Tx1, and one end of the second surface acoustic wave filter S2 is signal-connected to the corresponding first channel receiving end Rx1 , and the other end is connected to the matching circuit C signal, wherein, one end of the matching circuit C is connected to the antenna terminal AP signal, and the matching circuit C is an inductance element, and the inductance value of the inductance element is 3nH-7nH, Therefore, only one inductor is needed to meet the matching requirements of the multiplexer, which greatly reduces the structural complexity.
以上述組成之表面聲波多工器M，將會出現以下兩種情形:With the above-mentioned surface acoustic wave multiplexer M, the following two situations will occur:
第一種情形為當第一表面聲波濾波器S1位於對應頻道時，其對應之反射係數趨近於0，即其本身接近阻抗匹配條件，且，第二表面聲波濾波器S2對應之反射係數趨近於1，即接近開路條件。The first situation is that when the first surface acoustic wave filter S1 is located in the corresponding channel, its corresponding reflection coefficient tends to 0, that is, it itself is close to the impedance matching condition, and the corresponding reflection coefficient of the second surface acoustic wave filter S2 tends to Close to 1, that is, close to the open circuit condition.
第二種情形為當第二表面聲波濾波器S2位於對應頻道時，其對應之反射係數趨近於0，即其本身接近阻抗匹配條件，且，第一表面聲波濾波器S1對應之反射係數趨近於1，即接近開路條件，如此一來，即可避免頻帶干擾。The second situation is that when the second surface acoustic wave filter S2 is located in the corresponding channel, its corresponding reflection coefficient tends to 0, that is, it itself is close to the impedance matching condition, and the corresponding reflection coefficient of the first surface acoustic wave filter S1 tends to Closer to 1, that is, close to the open circuit condition, in this way, frequency band interference can be avoided.
請參閱第三圖，其為本發明之另一實施例之表面聲波多工器示意圖。如圖所示，分別配置為第一表面聲波濾波器S1、第二表面聲波濾波器S2、第三表面聲波濾波器S3及第四表面聲波濾波器S4，其中，第二表面聲波濾波器S2之一端與匹配電路C之一端訊號連接，且，第二表面聲波濾波器S2之另一端與第一頻道接收端Rx1訊號連接，其餘第一表面聲波濾波器S1、第三表面聲波濾波器S3及第四表面聲波濾波器S4之一端皆分別與天線端AP訊號連接，同時，第一表面聲波濾波器S1之另一端與對應之第一頻道發射端Tx1訊號連接、第三表面聲波濾波器S3之另一端與對應之第二頻道發射端Tx2訊號連接，及第四表面聲波濾波器S4之另一端與對應之第二頻道接收端Rx2訊號連接，但不在此限。Please refer to the third figure, which is a schematic diagram of a surface acoustic wave multiplexer according to another embodiment of the present invention. As shown in the figure, they are respectively configured as the first surface acoustic wave filter S1, the second surface acoustic wave filter S2, the third surface acoustic wave filter S3 and the fourth surface acoustic wave filter S4, wherein the second surface acoustic wave filter S2 One end is signal-connected to one end of the matching circuit C, and the other end of the second surface acoustic wave filter S2 is signal-connected to the first channel receiving end Rx1, and the other first surface acoustic wave filter S1, the third surface acoustic wave filter S3 and the first One end of the four surface acoustic wave filters S4 is connected to the signal of the antenna terminal AP respectively, and at the same time, the other end of the first surface acoustic wave filter S1 is connected to the corresponding first channel transmitter Tx1 signal, and the other end of the third surface acoustic wave filter S3 One end is signal-connected to the corresponding second channel transmitter Tx2, and the other end of the fourth surface acoustic wave filter S4 is signal-connected to the corresponding second channel receiver Rx2, but not limited thereto.
以上述組成之表面聲波多工器M，將會出現以下四種情形:With the above-mentioned surface acoustic wave multiplexer M, there will be the following four situations:
第一種情形為當第一表面聲波濾波器S1於對應之頻道時，其對應之反射係數趨近於0，即其本身接近阻抗匹配條件，且，第二表面聲波濾波器S2、第三表面聲波濾波器S3及第四表面聲波濾波器S4對應之反射係數趨近於1，即接近開路條件。The first situation is that when the first surface acoustic wave filter S1 is in the corresponding channel, its corresponding reflection coefficient approaches 0, that is, it itself is close to the impedance matching condition, and the second surface acoustic wave filter S2 and the third surface acoustic wave filter S2 The reflection coefficients corresponding to the acoustic wave filter S3 and the fourth surface acoustic wave filter S4 are close to 1, that is, close to the open circuit condition.
第二種情形為當第二表面聲波濾波器S2於對應之頻道時，其對應之反射係數趨近於0，即其本身接近阻抗匹配條件，且，第一表面聲波濾波器S1、第三表面聲波濾波器S3及第四表面聲波濾波器S4對應之反射係數趨近於1，即接近開路條件。The second situation is that when the second surface acoustic wave filter S2 is in the corresponding channel, its corresponding reflection coefficient approaches 0, that is, it itself is close to the impedance matching condition, and the first surface acoustic wave filter S1, the third surface acoustic wave filter The reflection coefficients corresponding to the acoustic wave filter S3 and the fourth surface acoustic wave filter S4 are close to 1, that is, close to the open circuit condition.
第三種情形為當第三表面聲波濾波器S3於對應之頻道時，其對應之反射係數趨近於0，即其本身接近阻抗匹配條件，且，第一表面聲波濾波器S1、第二表面聲波濾波器S2及第四表面聲波濾波器S4對應之反射係數趨近於1，即接近開路條件。The third situation is that when the third surface acoustic wave filter S3 is in the corresponding channel, its corresponding reflection coefficient approaches 0, that is, it itself is close to the impedance matching condition, and the first surface acoustic wave filter S1, the second surface acoustic wave filter S1, the second surface acoustic wave filter S3 The reflection coefficients corresponding to the acoustic wave filter S2 and the fourth surface acoustic wave filter S4 are close to 1, that is, close to the open circuit condition.
第四種情形為當第四表面聲波濾波器S4於對應之頻道時，其對應之反射係數趨近於0，即其本身接近阻抗匹配條件，且，第一表面聲波濾波器S1、第二表面聲波濾波器S2及第三表面聲波濾波器S3對應之反射係數趨近於1，即接近開路條件。The fourth situation is that when the fourth surface acoustic wave filter S4 is in the corresponding channel, its corresponding reflection coefficient approaches 0, that is, it itself is close to the impedance matching condition, and the first surface acoustic wave filter S1 and the second surface acoustic wave filter S1 The reflection coefficients corresponding to the acoustic wave filter S2 and the third surface acoustic wave filter S3 are close to 1, that is, close to the open circuit condition.
請參閱第四圖，其為本發明之再一實施例之表面聲波多工器示意圖。如圖所示，分別配置為第一表面聲波濾波器S1、第二表面聲波濾波器S2、第三表面聲波濾波器S3、第四表面聲波濾波器S4、第五表面聲波濾波器S5及第六表面聲波濾波器S6，其中，第二表面聲波濾波器S2之一端與匹配電路C之一端訊號連接，且，第二表面聲波濾波器S2之另一端與第一頻道接收端Rx1訊號連接，其餘第一表面聲波濾波器S1、第三表面聲波濾波器S3及第四表面聲波濾波器S4之一端皆分別與天線端AP訊號連接，而第一表面聲波濾波器S1之另一端與對應之第一頻道發射端Tx1訊號連接、第三表面聲波濾波器S3之另一端與對應之第二頻道發射端Tx2訊號連接、第四表面聲波濾波器S4之另一端與對應之第二頻道接收端Rx2訊號連接、第五表面聲波濾波器S5之另一端與對應之第三頻道發射端Tx3訊號連接，以及第六表面聲波濾波器S6之另一端與對應之第三頻道接收端Rx3訊號連接，但不在此限。Please refer to FIG. 4 , which is a schematic diagram of a surface acoustic wave multiplexer according to another embodiment of the present invention. As shown in the figure, they are respectively configured as the first surface acoustic wave filter S1, the second surface acoustic wave filter S2, the third surface acoustic wave filter S3, the fourth surface acoustic wave filter S4, the fifth surface acoustic wave filter S5 and the sixth surface acoustic wave filter Surface acoustic wave filter S6, wherein, one end of the second surface acoustic wave filter S2 is signal-connected to one end of the matching circuit C, and the other end of the second surface acoustic wave filter S2 is signal-connected to the first channel receiving end Rx1, and the other end One end of a surface acoustic wave filter S1, the third surface acoustic wave filter S3 and the fourth surface acoustic wave filter S4 are respectively connected to the signal of the antenna terminal AP, and the other end of the first surface acoustic wave filter S1 is connected to the corresponding first channel The transmitter Tx1 signal connection, the other end of the third surface acoustic wave filter S3 is connected to the corresponding second channel transmitter Tx2 signal, the other end of the fourth surface acoustic wave filter S4 is connected to the corresponding second channel receiver Rx2 signal, The other end of the fifth SAW filter S5 is signal-connected to the corresponding third channel transmitting end Tx3, and the other end of the sixth SAW filter S6 is signal-connected to the corresponding third channel receiving end Rx3, but not limited thereto.
以上述組成之表面聲波多工器M，將會出現以下六種情形:With the above-mentioned surface acoustic wave multiplexer M, there will be the following six situations:
第一種情形為當第一表面聲波濾波器S1於對應之頻道時，其對應之反射係數趨近於0，即其本身接近阻抗匹配條件，且，第二表面聲波濾波器S2、第三表面聲波濾波器S3、第四表面聲波濾波器S4、第五表面聲波濾波器S5及第六表面聲波濾波器S6對應之反射係數趨近於1，即接近開路條件。The first situation is that when the first surface acoustic wave filter S1 is in the corresponding channel, its corresponding reflection coefficient approaches 0, that is, it itself is close to the impedance matching condition, and the second surface acoustic wave filter S2 and the third surface acoustic wave filter S2 The reflection coefficients corresponding to the acoustic wave filter S3 , the fourth surface acoustic wave filter S4 , the fifth surface acoustic wave filter S5 and the sixth surface acoustic wave filter S6 are close to 1, that is, close to the open circuit condition.
第二種情形為當第二表面聲波濾波器S2於對應之頻道時，其對應之反射係數趨近於0，即其本身接近阻抗匹配條件，且，第一表面聲波濾波器S1、第三表面聲波濾波器S3、第四表面聲波濾波器S4、第五表面聲波濾波器S5及第六表面聲波濾波器S6對應之反射係數趨近於1，即接近開路條件。The second situation is that when the second surface acoustic wave filter S2 is in the corresponding channel, its corresponding reflection coefficient approaches 0, that is, it itself is close to the impedance matching condition, and the first surface acoustic wave filter S1, the third surface acoustic wave filter The reflection coefficients corresponding to the acoustic wave filter S3 , the fourth surface acoustic wave filter S4 , the fifth surface acoustic wave filter S5 and the sixth surface acoustic wave filter S6 are close to 1, that is, close to the open circuit condition.
第三種情形為當第三表面聲波濾波器S3於對應之頻道時，其對應之反射係數趨近於0，即其本身接近阻抗匹配條件，且，第一表面聲波濾波器S1、第二表面聲波濾波器S2、第四表面聲波濾波器S4、第五表面聲波濾波器S5及第六表面聲波濾波器S6對應之反射係數趨近於1，即接近開路條件。The third situation is that when the third surface acoustic wave filter S3 is in the corresponding channel, its corresponding reflection coefficient approaches 0, that is, it itself is close to the impedance matching condition, and the first surface acoustic wave filter S1, the second surface acoustic wave filter S1, the second surface acoustic wave filter S3 The reflection coefficients corresponding to the acoustic wave filter S2 , the fourth surface acoustic wave filter S4 , the fifth surface acoustic wave filter S5 and the sixth surface acoustic wave filter S6 are close to 1, that is, close to the open circuit condition.
第四種情形為當第四表面聲波濾波器S4於對應之頻道時，其對應之反射係數趨近於0，即其本身接近阻抗匹配條件，且，第一表面聲波濾波器S1、第二表面聲波濾波器S2、第三表面聲波濾波器S3、第五表面聲波濾波器S5及第六表面聲波濾波器S6對應之反射係數趨近於1，即接近開路條件。The fourth situation is that when the fourth surface acoustic wave filter S4 is in the corresponding channel, its corresponding reflection coefficient approaches 0, that is, it itself is close to the impedance matching condition, and the first surface acoustic wave filter S1 and the second surface acoustic wave filter S1 The reflection coefficients corresponding to the acoustic wave filter S2 , the third surface acoustic wave filter S3 , the fifth surface acoustic wave filter S5 and the sixth surface acoustic wave filter S6 are close to 1, that is, close to the open circuit condition.
第五種情形為當第五表面聲波濾波器S5於對應之頻道時，其對應之反射係數趨近於0，即其本身接近阻抗匹配條件，且，第一表面聲波濾波器S1、第二表面聲波濾波器S2、第三表面聲波濾波器S3、第四表面聲波濾波器S4及第六表面聲波濾波器S6對應之反射係數趨近於1，即接近開路條件。The fifth situation is that when the fifth surface acoustic wave filter S5 is in the corresponding channel, its corresponding reflection coefficient tends to 0, that is, it itself is close to the impedance matching condition, and the first surface acoustic wave filter S1 and the second surface acoustic wave filter S1 The reflection coefficients corresponding to the acoustic wave filter S2 , the third surface acoustic wave filter S3 , the fourth surface acoustic wave filter S4 and the sixth surface acoustic wave filter S6 are close to 1, that is, close to the open circuit condition.
第六種情形為當第六表面聲波濾波器S6於對應之頻道時，其對應之反射係數趨近於0，即其本身接近阻抗匹配條件，且，第一表面聲波濾波器S1、第二表面聲波濾波器S2、第三表面聲波濾波器S3、第四表面聲波濾波器S4及第五表面聲波濾波器S5對應之反射係數趨近於1，即接近開路條件。The sixth situation is that when the sixth surface acoustic wave filter S6 is in the corresponding channel, its corresponding reflection coefficient approaches 0, that is, it itself is close to the impedance matching condition, and the first surface acoustic wave filter S1 and the second surface acoustic wave filter S1 The reflection coefficients corresponding to the acoustic wave filter S2 , the third surface acoustic wave filter S3 , the fourth surface acoustic wave filter S4 and the fifth surface acoustic wave filter S5 are close to 1, that is, close to the open circuit condition.
為更清楚表達本實施例之功效，詳細說明如下:For expressing the effect of the present embodiment more clearly, describe in detail as follows:
請參閱第五A至五D圖，其為本發明之一實施例之第一表面聲波濾波器之阻抗圖、第二表面聲波濾波器之阻抗圖、第三表面聲波濾波器之阻抗圖及第四表面聲波濾波器之阻抗圖。如圖所示，於一實施例中，以四工器舉例而言，即第一頻道發射端Tx1頻道為1920MHz-1980MHz、第一頻道接收端Rx1頻道為2110MHz-2170MHz、第二頻道發射端Tx2頻道為1710MHz-1785MHz，以及第二頻道接收端Rx2頻道為1805MHz~1880MHz為例，由圖可知，將會出現以下四種情形:Please refer to Figures 5A to 5D, which are the impedance diagrams of the first surface acoustic wave filter, the impedance diagram of the second surface acoustic wave filter, the impedance diagram of the third surface acoustic wave filter and the impedance diagram of the first surface acoustic wave filter according to an embodiment of the present invention. Impedance diagrams of four surface acoustic wave filters. As shown in the figure, in one embodiment, taking a quadruplexer as an example, the first channel transmitter Tx1 channel is 1920MHz-1980MHz, the first channel receiver Rx1 channel is 2110MHz-2170MHz, and the second channel transmitter Tx2 The channel is 1710MHz-1785MHz, and the Rx2 channel of the second channel receiving end is 1805MHz~1880MHz as an example. As can be seen from the figure, the following four situations will occur:
第一種情形為第一表面聲波濾波器S1當位於1920MHz-1980MHz時，阻抗接近匹配條件，且當位於2110MHz-2170MHz時，且當位於1710MHz-1785MHz時，且當位於1805MHz~1880MHz時，阻抗接近開路條件。The first situation is that when the first surface acoustic wave filter S1 is located at 1920MHz-1980MHz, the impedance is close to the matching condition, and when it is located at 2110MHz-2170MHz, and when it is located at 1710MHz-1785MHz, and when it is located at 1805MHz~1880MHz, the impedance is close to open circuit condition.
第二種情形為第二表面聲波濾波器S2當位於2110MHz-2170MHz時，阻抗接近匹配條件，且當位於1920MHz-1980MHz時，且當位於1710MHz-1785MHz時，且當位於1805MHz~1880MHz時，阻抗接近開路條件。The second situation is that when the second surface acoustic wave filter S2 is located at 2110MHz-2170MHz, the impedance is close to the matching condition, and when it is located at 1920MHz-1980MHz, and when it is located at 1710MHz-1785MHz, and when it is located at 1805MHz~1880MHz, the impedance is close to open circuit condition.
第三種情形為第三表面聲波濾波器S3當位於1710MHz-1785MHz時，阻抗接近匹配條件，且當位於1920MHz-1980MHz時，且當位於2110MHz-2170MHz時，且當位於1805MHz~1880MHz時，阻抗接近開路條件。The third situation is that when the third surface acoustic wave filter S3 is located at 1710MHz-1785MHz, the impedance is close to the matching condition, and when it is located at 1920MHz-1980MHz, and when it is located at 2110MHz-2170MHz, and when it is located at 1805MHz~1880MHz, the impedance is close to open circuit condition.
第四種情形為第四表面聲波濾波器S4當位於1805MHz~1880MHz時，阻抗接近匹配條件，且當位於1920MHz-1980MHz時，且當位於2110MHz-2170MHz時，且當位於1710MHz-1785MHz時，阻抗接近短路條件，阻抗非常低。The fourth situation is that when the fourth surface acoustic wave filter S4 is located at 1805MHz~1880MHz, the impedance is close to the matching condition, and when it is located at 1920MHz-1980MHz, and when it is located at 2110MHz-2170MHz, and when it is located at 1710MHz-1785MHz, the impedance is close to Short circuit condition, very low impedance.
又，請參閱第六A至六E圖，其為本發明之一實施例之第一表面聲波濾波器、第二表面聲波濾波器、第三表面聲波濾波器並聯後之阻抗圖及其並聯後在第一表面聲波濾波器對應頻道之阻抗圖、並聯後在第二表面聲波濾波器對應頻道之阻抗圖、並聯後在第三表面聲波濾波器對應頻道之阻抗圖與並聯後在第四表面聲波濾波器對應頻道之阻抗圖。Also, please refer to Figures 6A to 6E, which are the impedance diagrams of the parallel connection of the first surface acoustic wave filter, the second surface acoustic wave filter, and the third surface acoustic wave filter of an embodiment of the present invention and their parallel connection The impedance diagram of the corresponding channel of the first SAW filter, the impedance diagram of the corresponding channel of the second SAW filter after parallel connection, the impedance diagram of the corresponding channel of the third SAW filter after parallel connection and the fourth SAW filter after parallel connection The impedance diagram of the filter corresponding to the channel.
請參閱第七A至七E圖，其為本發明之一實施例之匹配電路與第四表面聲波濾波器串聯後之阻抗圖及其串聯後在第一表面聲波濾波器對應頻道之阻抗圖、串聯後在第二表面聲波濾波器對應頻道之阻抗圖、串聯後在第三表面聲波濾波器對應頻道之阻抗圖與串聯後在第四表面聲波濾波器對應頻道之阻抗圖，與前述第六A至第六E圖對照可知，第六B圖在第一表面聲波濾波器S1對應頻道之阻抗與第七B圖在第一表面聲波濾波器S1對應頻道之阻抗滿足阻抗共軛匹配條件；第六C圖在第二表面聲波濾波器S2對應頻道之阻抗與第七C圖在第二表面聲波濾波器S2對應頻道之阻抗滿足阻抗共軛匹配條件；第六D圖在第三表面聲波濾波器S3對應頻道之阻抗與第七D圖在第三表面聲波濾波器S3對應頻道之阻抗滿足阻抗共軛匹配條件；及第六E圖在第四表面聲波濾波器S4對應頻道之阻抗與第七E圖在第四表面聲波濾波器S4對應頻道之阻抗滿足阻抗共軛匹配條件。Please refer to Figures 7A to 7E, which are the impedance diagrams of the matching circuit and the fourth surface acoustic wave filter in series according to an embodiment of the present invention and the impedance diagrams of the corresponding channel of the first surface acoustic wave filter after series connection, The impedance diagram of the corresponding channel of the second surface acoustic wave filter after series connection, the impedance diagram of the corresponding channel of the third surface acoustic wave filter after series connection and the impedance diagram of the corresponding channel of the fourth surface acoustic wave filter after series connection, and the above-mentioned sixth A It can be seen from the comparison of the sixth E figure that the impedance of the sixth B figure in the channel corresponding to the first surface acoustic wave filter S1 and the impedance of the seventh B figure in the first surface acoustic wave filter S1 corresponding channel meet the impedance conjugate matching condition; the sixth The impedance of the channel corresponding to the second surface acoustic wave filter S2 in picture C and the impedance of the channel corresponding to the second surface acoustic wave filter S2 in the seventh picture C meet the impedance conjugate matching condition; the sixth picture D is in the third surface acoustic wave filter S3 The impedance of the corresponding channel and the impedance of the corresponding channel of the third surface acoustic wave filter S3 in the seventh D diagram meet the impedance conjugate matching condition; and the impedance of the sixth E diagram in the fourth surface acoustic wave filter S4 corresponding channel and the seventh E diagram The impedance of the channel corresponding to the fourth surface acoustic wave filter S4 satisfies the impedance conjugate matching condition.
同時，參閱第八A至八E圖，其為本發明之一實施例之四工器組合後之阻抗圖及其組合後在第一表面聲波濾波器對應頻道之阻抗圖、組合後在第二表面聲波濾波器對應頻道之阻抗圖、組合後在第三表面聲波濾波器對應頻道之阻抗圖與組合後在第四表面聲波濾波器對應頻道之阻抗圖，由圖中可知，本發明之一實施例之四工器在第一表面聲波濾波器S1之對應頻道、第二表面聲波濾波器S2之對應頻道、第三表面聲波濾波器S3之對應頻道及第四表面聲波濾波器S4之對應頻道之阻抗皆接近匹配條件。At the same time, referring to the eighth A to eight E figure, it is the impedance figure after the combination of the quadruplexer of one embodiment of the present invention and the impedance figure of the channel corresponding to the first surface acoustic wave filter after the combination, and the impedance figure in the second surface acoustic wave filter after the combination The impedance diagram of the corresponding channel of the surface acoustic wave filter, the impedance diagram of the corresponding channel of the third surface acoustic wave filter after combination, and the impedance diagram of the corresponding channel of the fourth surface acoustic wave filter after combination, as can be seen from the figure, one implementation of the present invention Example quadruplexer in the corresponding channel of the first surface acoustic wave filter S1, the corresponding channel of the second surface acoustic wave filter S2, the corresponding channel of the third surface acoustic wave filter S3 and the corresponding channel of the fourth surface acoustic wave filter S4 Impedances are close to matching conditions.
最後請參閱第九圖，其為本發明之一實施例之四工器組合後之頻率響應圖。如圖所示，以前述表面聲波濾波器所組合成之四工器為例，其僅串接一個電感元件於接收端之表面聲波濾波器，即可實現多工器之各濾波器在本身頻道阻抗接近匹配條件，其餘則阻抗接近開路條件，而可達成習知技術以多種複雜元件組成之匹配電路所產生之功效，此一結構將有效降低多工器的匹配電路數量及匹配電路元件複雜度，且，其中，表面聲波多工器M可以是四工器、六工器或八工器等，不在此限。Finally, please refer to FIG. 9 , which is a frequency response diagram of the combined quadruplexers according to an embodiment of the present invention. As shown in the figure, taking the quadruplexer composed of the above-mentioned surface acoustic wave filter as an example, only one inductance element is connected in series with the surface acoustic wave filter at the receiving end, and each filter of the multiplexer can be realized in its own channel. The impedance is close to the matching condition, and the rest is close to the open circuit condition, which can achieve the effect of the matching circuit composed of a variety of complex components in the conventional technology. This structure will effectively reduce the number of matching circuits and the complexity of the matching circuit components in the multiplexer. , and, wherein, the surface acoustic wave multiplexer M may be a quadruplexer, a hexaplexer or an octaplexer, etc., but not limited thereto.
綜上所述，本發明提供一種表面聲波多工器，其以表面聲波濾波器，並結合設置於接收端之表面聲波濾波器之匹配電路，實現降低匹配電路之複雜程度，同時，降低成本。To sum up, the present invention provides a surface acoustic wave multiplexer, which uses a surface acoustic wave filter and a matching circuit of the surface acoustic wave filter at the receiving end to reduce the complexity of the matching circuit and reduce the cost.
惟以上所述者，僅為本發明之較佳實施例，但不能以此限定本發明實施之範圍；故，凡依本發明申請專利範圍及說明書內容所做之簡單的等效改變與修飾，皆仍屬本發明專利涵蓋之範圍內。But what is described above is only a preferred embodiment of the present invention, but it cannot limit the scope of implementation of the present invention; therefore, all simple equivalent changes and modifications made according to the patent scope of the present invention and the contents of the description, All still belong to the scope covered by the patent of the present invention.
AP:天線端 C:匹配電路 M:表面聲波多工器 R1:第一共振器 R2:第二共振器 R3:第三共振器 R4:第四共振器 R5:第五共振器 R6:第六共振器 R7:第七共振器 R8:第八共振器 R9:第九共振器 R10:第十共振器 R11:第十一共振器 R12:第十二共振器 R13:第十三共振器 Rx1:第一頻道接收端 Rx2:第二頻道接收端 Rx3:第三頻道接收端 S1:第一表面聲波濾波器 S2:第二表面聲波濾波器 S3:第三表面聲波濾波器 S4:第四表面聲波濾波器 S5:第五表面聲波濾波器 S6:第六表面聲波濾波器 SA:表面聲波濾波器 Tx1:第一頻道發射端 Tx2:第二頻道發射端 Tx3:第三頻道發射端AP: Antenna end C: Matching circuit M: Surface Acoustic Wave Multiplexer R1: first resonator R2: second resonator R3: the third resonator R4: Fourth resonator R5: fifth resonator R6: sixth resonator R7: seventh resonator R8: eighth resonator R9: ninth resonator R10: tenth resonator R11: Eleventh resonator R12: Twelfth resonator R13: Thirteenth resonator Rx1: The first channel receiver Rx2: second channel receiver Rx3: The third channel receiver S1: first surface acoustic wave filter S2: second surface acoustic wave filter S3: third surface acoustic wave filter S4: The fourth surface acoustic wave filter S5: fifth surface acoustic wave filter S6: sixth surface acoustic wave filter SA: surface acoustic wave filter Tx1: first channel transmitter Tx2: The second channel transmitter Tx3: The third channel transmitter
第一圖: 其為本發明之一實施例之表面聲波多工器示意圖； 第二A圖: 其為本發明之一實施例之表面聲波濾波器示意圖； 第二B圖: 其為本發明之另一實施例之表面聲波濾波器示意圖； 第三圖: 其為本發明之另一實施例之表面聲波多工器示意圖； 第四圖: 其為本發明之再一實施例之表面聲波多工器示意圖； 第五A圖: 其為本發明之一實施例之第一表面聲波濾波器之阻抗圖； 第五B圖: 其為本發明之一實施例之第二表面聲波濾波器之阻抗圖； 第五C圖: 其為本發明之一實施例之第三表面聲波濾波器之阻抗圖； 第五D圖: 其為本發明之一實施例之第四表面聲波濾波器之阻抗圖； 第六A圖: 其為本發明之一實施例之第一表面聲波濾波器、第二表面聲波濾波器、第三表面聲波濾波器並聯後之阻抗圖； 第六B圖: 其為本發明之一實施例之第一表面聲波濾波器、第二表面聲波濾波器、第三表面聲波濾波器並聯後在第一表面聲波濾波器對應頻道之阻抗圖； 第六C圖: 其為本發明之一實施例之第一表面聲波濾波器、第二表面聲波濾波器、第三表面聲波濾波器並聯後在第二表面聲波濾波器對應頻道之阻抗圖； 第六D圖: 其為本發明之一實施例之第一表面聲波濾波器、第二表面聲波濾波器、第三表面聲波濾波器並聯後在第三表面聲波濾波器對應頻道之阻抗圖； 第六E圖: 其為本發明之一實施例之第一表面聲波濾波器、第二表面聲波濾波器、第三表面聲波濾波器並聯後在第四表面聲波濾波器對應頻道之阻抗圖； 第七A圖: 其為本發明之一實施例之匹配電路與第四表面聲波濾波器串聯後之阻抗圖； 第七B圖: 其為本發明之一實施例之匹配電路與第四表面聲波濾波器串聯後在第一表面聲波濾波器對應頻道之阻抗圖； 第七C圖: 其為本發明之一實施例之匹配電路與第四表面聲波濾波器串聯後在第二表面聲波濾波器對應頻道之阻抗圖； 第七D圖: 其為本發明之一實施例之匹配電路與第四表面聲波濾波器串聯後在第三表面聲波濾波器對應頻道之阻抗圖； 第七E圖: 其為本發明之一實施例之匹配電路與第四表面聲波濾波器串聯後在第四表面聲波濾波器對應頻道之阻抗圖； 第八A圖: 其為本發明之一實施例之四工器組合後之阻抗圖； 第八B圖: 其為本發明之一實施例之四工器組合後之在第一表面聲波濾波器對應頻道之阻抗圖； 第八C圖: 其為本發明之一實施例之四工器組合後之在第二表面聲波濾波器對應頻道之阻抗圖； 第八D圖: 其為本發明之一實施例之四工器組合後之在第三表面聲波濾波器對應頻道之阻抗圖； 第八E圖: 其為本發明之一實施例之四工器組合後之在第四表面聲波濾波器對應頻道之阻抗圖；及 第九圖: 其為本發明之一實施例之四工器組合後之頻率響應圖。 Figure 1: It is a schematic diagram of a surface acoustic wave multiplexer according to an embodiment of the present invention; The second figure A: it is a schematic diagram of a surface acoustic wave filter according to an embodiment of the present invention; Second Figure B: It is a schematic diagram of a surface acoustic wave filter according to another embodiment of the present invention; Figure 3: It is a schematic diagram of a surface acoustic wave multiplexer according to another embodiment of the present invention; Figure 4: It is a schematic diagram of a surface acoustic wave multiplexer according to another embodiment of the present invention; The fifth figure A: it is the impedance diagram of the first surface acoustic wave filter of one embodiment of the present invention; The fifth figure B: it is the impedance diagram of the second surface acoustic wave filter of one embodiment of the present invention; The fifth figure C: it is the impedance diagram of the third surface acoustic wave filter of one embodiment of the present invention; The fifth D figure: it is the impedance figure of the 4th surface acoustic wave filter of one embodiment of the present invention; Figure 6 A: It is an impedance diagram of the parallel connection of the first surface acoustic wave filter, the second surface acoustic wave filter and the third surface acoustic wave filter according to an embodiment of the present invention; Figure 6 B: It is an impedance diagram of the first surface acoustic wave filter, the second surface acoustic wave filter, and the third surface acoustic wave filter in parallel connection in the corresponding channel of the first surface acoustic wave filter according to an embodiment of the present invention; Figure 6 C: It is an impedance diagram of the channel corresponding to the second surface acoustic wave filter after the first surface acoustic wave filter, the second surface acoustic wave filter, and the third surface acoustic wave filter are connected in parallel according to an embodiment of the present invention; Figure 6 D: It is an impedance diagram of the channel corresponding to the third surface acoustic wave filter after the first surface acoustic wave filter, the second surface acoustic wave filter, and the third surface acoustic wave filter are connected in parallel according to an embodiment of the present invention; Figure 6 E: It is an impedance diagram of the channel corresponding to the fourth surface acoustic wave filter after the first surface acoustic wave filter, the second surface acoustic wave filter, and the third surface acoustic wave filter are connected in parallel according to an embodiment of the present invention; The seventh figure A: it is an impedance diagram after the matching circuit of an embodiment of the present invention is connected in series with the fourth surface acoustic wave filter; The seventh figure B: it is an impedance diagram of the corresponding channel of the first surface acoustic wave filter after the matching circuit of an embodiment of the present invention is connected in series with the fourth surface acoustic wave filter; The seventh figure C: it is an impedance diagram of the corresponding channel of the second surface acoustic wave filter after the matching circuit of one embodiment of the present invention is connected in series with the fourth surface acoustic wave filter; The seventh figure D: it is the impedance diagram of the corresponding channel of the third surface acoustic wave filter after the matching circuit of one embodiment of the present invention is connected in series with the fourth surface acoustic wave filter; The seventh E figure: it is the impedance diagram of the corresponding channel of the fourth surface acoustic wave filter after the matching circuit of one embodiment of the present invention is connected in series with the fourth surface acoustic wave filter; The eighth Figure A: It is an impedance diagram after the quadruplexer combination of an embodiment of the present invention; The eighth figure B: it is the impedance diagram of the channel corresponding to the first surface acoustic wave filter after the quadruplexer combination of an embodiment of the present invention; The eighth figure C: it is the impedance diagram of the channel corresponding to the second surface acoustic wave filter after the quadruplexer combination according to an embodiment of the present invention; The eighth figure D: it is the impedance diagram of the channel corresponding to the third surface acoustic wave filter after the quadruplexer combination of an embodiment of the present invention; The eighth E figure: it is the impedance diagram of the channel corresponding to the fourth surface acoustic wave filter after the quadruplexer combination of an embodiment of the present invention; and Figure 9: It is a frequency response diagram of a quadruplexer combination according to an embodiment of the present invention.
AP:天線端 AP: Antenna end
C:匹配電路 C: Matching circuit
M:表面聲波多工器 M: Surface Acoustic Wave Multiplexer
Rx1:第一頻道接收端 Rx1: The first channel receiver
S1:第一表面聲波濾波器 S1: first surface acoustic wave filter
S2:第二表面聲波濾波器 S2: second surface acoustic wave filter
Tx1:第一頻道發射端 Tx1: first channel transmitter
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| US20200014370A1 (en) * | 2017-03-31 | 2020-01-09 | Murata Manufacturing Co., Ltd. | Multiplexer, high-frequency front end circuit, and communication device |
| US20200153414A1 (en) * | 2017-07-20 | 2020-05-14 | Murata Manufacturing Co., Ltd. | Multiplexer, radio-frequency (rf) front-end circuit, and communication apparatus |
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