TWI601379B - Duplexer circuit and duplexer circuit module - Google Patents
Duplexer circuit and duplexer circuit module Download PDFInfo
- Publication number
- TWI601379B TWI601379B TW105132724A TW105132724A TWI601379B TW I601379 B TWI601379 B TW I601379B TW 105132724 A TW105132724 A TW 105132724A TW 105132724 A TW105132724 A TW 105132724A TW I601379 B TWI601379 B TW I601379B
- Authority
- TW
- Taiwan
- Prior art keywords
- pass filter
- terminal
- duplexer
- inductor
- switch
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/46—Networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Filters And Equalizers (AREA)
- Transceivers (AREA)
Description
本發明係關於一種具備複數個低通濾波器、高通濾波器或帶通濾波器，且切換使用複數個低通濾波器之雙工器電路，更詳細而言，係關於一種可抑制高通濾波器或帶通濾波器之通過頻帶內產生之多餘衰減的雙工器電路。 The present invention relates to a duplexer circuit having a plurality of low pass filters, high pass filters or band pass filters, and switching a plurality of low pass filters, and more particularly to a suppressable high pass filter Or a duplexer circuit with unwanted attenuation generated in the passband of the bandpass filter.
而且，本發明係關於一種於一個模組基板構成有本發明之雙工器電路的雙工器電路模組。 Moreover, the present invention relates to a duplexer circuit module in which a duplexer circuit of the present invention is constructed on a module substrate.
作為利用有線電視之線路的高速資料通訊之規格，指定有DOCSIS(註冊商標)(Data Over Cable Service Interface Specifications，纜線數據服務介面規格)，且多個國家採用該規格進行資料通訊服務。 As a specification for high-speed data communication using a cable television line, DOCSIS (registered trademark) (Data Over Cable Service Interface Specifications) is designated, and many countries use this specification for data communication services.
目前為止，DOCSIS多次得到改善，且進行了修訂。而且，預計今後還會修訂。 So far, DOCSIS has been improved several times and has been revised. Moreover, it is expected to be revised in the future.
DOCSIS之修訂中，通訊頻率有時會變更。 In the revision of DOCSIS, the communication frequency sometimes changes.
作為DOCSIS，當修訂中通訊頻率變更時，有義務使新版本之通訊機器亦可用於舊版本，換而言之，使新版本之通訊機器亦可對應於舊版本之通訊頻率。即，有義務使新的通訊機器於採用舊版本之服務地區及採用新版本之服務地區均具有相容性而可兼用。故而，當依照DOCSIS，使用一個通訊機器、以複數個通訊頻率進行雙向通訊時，於使來自外部之 天線或線纜與內部(室內)之通訊配線相連之機頂盒，有時採用切換使用對應於最新版本之DOCSIS或舊版本之DOCSIS之複數個濾波器的雙工器電路。 As DOCSIS, when the communication frequency in the revision changes, it is obligatory to make the new version of the communication machine available to the old version. In other words, the new version of the communication machine can also correspond to the communication frequency of the old version. That is, it is obligatory to make the new communication machine compatible with both the service area of the old version and the service area of the new version. Therefore, when using a communication machine to perform two-way communication at a plurality of communication frequencies in accordance with DOCSIS, it is externally A set-top box in which an antenna or cable is connected to an internal (indoor) communication wiring, sometimes a duplexer circuit that switches between a plurality of filters corresponding to the latest version of DOCSIS or an older version of DOCSIS.
此種雙工器電路係公開於專利文獻1(美國專利第7020186號公報)中。作為該雙工器電路，藉由切換使用兩個低通濾波器，可以兩個不同頻率進行發送。 Such a duplexer circuit is disclosed in Patent Document 1 (U.S. Patent No. 7,020,186). As the duplexer circuit, transmission can be performed at two different frequencies by switching between two low-pass filters.
圖5中表示專利文獻1中揭示之雙工器電路(具備可切換之低通濾波器之雙工器)300。 A duplexer circuit (a duplexer having a switchable low-pass filter) 300 disclosed in Patent Document 1 is shown in FIG.
雙工器電路300具備三個端子X、Y、Z。 The duplexer circuit 300 has three terminals X, Y, and Z.
而且，雙工器電路300具備分別由電感器與電容器構成之、第1低通濾波器LPF1、第2低通濾波器LPF2及高通濾波器HPF。圖6(A)中表示第1低通濾波器LPF1之等效電路。圖6(B)中表示第2低通濾波器LPF2之等效電路。圖6(C)中表示高通濾波器HPF之等效電路。 Further, the duplexer circuit 300 includes a first low pass filter LPF1, a second low pass filter LPF2, and a high pass filter HPF which are each composed of an inductor and a capacitor. An equivalent circuit of the first low pass filter LPF1 is shown in Fig. 6(A). An equivalent circuit of the second low pass filter LPF2 is shown in Fig. 6(B). An equivalent circuit of the high pass filter HPF is shown in Fig. 6(C).
而且，雙工器電路300具備連動地切換之第1開關SW1及第2開關SW2。 Further, the duplexer circuit 300 includes a first switch SW1 and a second switch SW2 that are switched in conjunction with each other.
雙工器電路300係藉由連動地切換第1開關SW1及第2開關SW2而使第1低通濾波器LPF1及第2低通濾波器LPF中之任一者擇一性地連接於端子X與端子Y之間。端子X與端子Z之間始終連接有高通濾波器HPF。 The duplexer circuit 300 selectively connects one of the first low pass filter LPF1 and the second low pass filter LPF to the terminal X by switching the first switch SW1 and the second switch SW2 in conjunction with each other. Between the terminal Y and the terminal. A high-pass filter HPF is always connected between the terminal X and the terminal Z.
雙工器電路300中，將端子X連接於提供內容之運營商等之線纜。而且，雙工器電路300中，將端子Y連接於發送電路(上行處理電路，upstream processing circuitry)。進而，雙工器電路300中，將端子Z連 接於接收電路(下行處理電路，downstream processing circuitry)。 In the duplexer circuit 300, the terminal X is connected to a cable of an operator or the like that provides content. Further, in the duplexer circuit 300, the terminal Y is connected to a transmission circuit (upstream processing circuitry). Further, in the duplexer circuit 300, the terminal Z is connected Connected to the receiving circuit (downstream processing circuitry).
雙工器電路300可藉由連動地切換第1開關SW1及第2開關SW2而選擇第1低通濾波器LPF1及第2低通濾波器LPF2中之任一者，且以不同之兩個頻率中之一頻率進行發送。 The duplexer circuit 300 can select either of the first low pass filter LPF1 and the second low pass filter LPF2 by switching the first switch SW1 and the second switch SW2 in conjunction with each other, and at two different frequencies. One of the frequencies is sent.
[專利文獻1]美國專利第7020186號公報 [Patent Document 1] US Patent No. 7020186
利用專利文獻1中揭示之雙工器電路300，製作能以兩個不同頻率進行發送之雙工器電路。 With the duplexer circuit 300 disclosed in Patent Document 1, a duplexer circuit capable of transmitting at two different frequencies is fabricated.
具體而言，將第1低通濾波器LPF1之截止頻率設定為42MHz。而且，將第2低通濾波器LPF2之截止頻率設定為65MHz。進而，將高通濾波器HPF之截止頻率設定為88MHz。該等截止頻率係藉由選定構成各濾波器之電感器及電容器之常數而決定。 Specifically, the cutoff frequency of the first low pass filter LPF1 is set to 42 MHz. Further, the cutoff frequency of the second low pass filter LPF2 is set to 65 MHz. Further, the cutoff frequency of the high pass filter HPF is set to 88 MHz. These cutoff frequencies are determined by selecting the constants of the inductors and capacitors that make up each filter.
而且，第1開關SW1及第2開關SW2分別使用SPDT(Single Pole Double Throw，單刀雙擲)開關。第1開關SW1與第2開關SW2係連動切換。 Further, the first switch SW1 and the second switch SW2 each use an SPDT (Single Pole Double Throw) switch. The first switch SW1 and the second switch SW2 are switched in conjunction with each other.
圖7(A)、(B)中表示於雙工器電路300之第1開關SW1與第2開關SW2之間連接有第1低通濾波器LPF1的情況下的頻率特性。而且，圖8(A)、(B)中表示於雙工器電路300之第1開關SW1與第2開關SW2之間連接有第2低通濾波器LPF2的情況下的頻率特性。再者，圖7 (A)中將圖7(B)局部放大表示，圖8(A)中將圖8(B)局部放大表示。 7(A) and 7(B) show the frequency characteristics when the first low-pass filter LPF1 is connected between the first switch SW1 and the second switch SW2 of the duplexer circuit 300. Further, in FIGS. 8(A) and 8(B), the frequency characteristics in the case where the second low-pass filter LPF2 is connected between the first switch SW1 and the second switch SW2 of the duplexer circuit 300 are shown. Furthermore, Figure 7 (A) is partially enlarged in Fig. 7(B), and partially enlarged in Fig. 8(B) in Fig. 8(A).
根據圖7(B)可知，當於雙工器電路300之第1開關SW1與第2開關SW2之間連接有第1低通濾波器LPF1時，於高通濾波器HPF之通過頻帶內之1.4GHz附近產生多餘衰減D1。而且，根據圖8(B)可知，當於雙工器電路300之第1開關SW1與第2開關SW2之間連接有第2低通濾波器LPF2時，亦同樣會於高通濾波器HPF之通過頻帶內之1.4GHz附近產生多餘衰減D2。 7(B), when the first low-pass filter LPF1 is connected between the first switch SW1 and the second switch SW2 of the duplexer circuit 300, it is 1.4 GHz in the pass band of the high-pass filter HPF. Excessive attenuation D1 is generated nearby. Further, as is clear from FIG. 8(B), when the second low-pass filter LPF2 is connected between the first switch SW1 and the second switch SW2 of the duplexer circuit 300, the high-pass filter HPF is also passed. Excessive attenuation D2 is generated near 1.4 GHz in the frequency band.
該等多餘衰減D1、D2係由於因圖5所示之X端子處之輸入阻抗與第1開關SW1所具有之阻抗不同所導致之阻抗不匹配而產生之共振現象引起。再者，當雙工器電路300之高通濾波器HPF置換為帶通濾波器BPF(未圖示)時，亦會產生同樣的問題。 These excess attenuations D1 and D2 are caused by resonance phenomena caused by impedance mismatch caused by the difference between the input impedance at the X terminal shown in FIG. 5 and the impedance of the first switch SW1. Furthermore, the same problem occurs when the high pass filter HPF of the duplexer circuit 300 is replaced with a band pass filter BPF (not shown).
專利文獻1中揭示之雙工器電路300中，於高通濾波器HPF之通過頻帶內之1.4GHz附近會產生多餘衰減D1、D2，故而，於依照DOCSIS 3.1之系統中，實際上無法用作能以兩個頻率進行發送之雙工器電路。 In the duplexer circuit 300 disclosed in Patent Document 1, excess attenuations D1 and D2 are generated in the vicinity of 1.4 GHz in the pass band of the high-pass filter HPF, and thus, in the system according to DOCSIS 3.1, it is practically impossible to use A duplexer circuit that transmits at two frequencies.
本發明係為了解決上述之先前之問題而完成，作為其解決手段，本發明之雙工器電路具備：共用端子；發送端子；接收端子；雙工器，其包含第1端子、第2端子、第3端子、第1低通濾波器及高通濾波器或帶通濾波器，於第1端子與第2端子之間***有第1低通濾波器，於第1端子與第3端子之間***有高通濾波器或帶通濾波器；第2低通濾波器；第3低通濾波器；及連動地切換之第1開關及第2開關；雙工器之第1端子連接於共用端子，雙工器之第2端子連接於第1開關，雙工器之第3端子連 接於接收端子，第2開關連接於發送端子，藉由連動地切換第1開關及第2開關，而使第2低通濾波器及第3低通濾波器中之任一者擇一性地連接於第1開關與第2開關之間。 The present invention has been made to solve the above-mentioned problems, and the duplexer circuit of the present invention includes: a common terminal; a transmitting terminal; a receiving terminal; and a duplexer including a first terminal and a second terminal. The third terminal, the first low pass filter, the high pass filter, or the band pass filter have a first low pass filter inserted between the first terminal and the second terminal, and are inserted between the first terminal and the third terminal a high-pass filter or a band-pass filter; a second low-pass filter; a third low-pass filter; and a first switch and a second switch that are switched in conjunction; the first terminal of the duplexer is connected to the common terminal, and The second terminal of the tool is connected to the first switch, and the third terminal of the duplexer is connected. Connected to the receiving terminal, the second switch is connected to the transmitting terminal, and the first switch and the second switch are switched in conjunction with each other, thereby selectively selecting either the second low pass filter and the third low pass filter. Connected between the first switch and the second switch.
較佳為，由第1低通濾波器與高通濾波器或帶通濾波器構成之雙工器係形成於一個模組基板。該情況下，藉由使用由多層基板構成之雙工器模組、或於多層基板安裝電容器等電子零件而構成之雙工器模組，可容易地製作本發明之雙工器電路。 Preferably, the duplexer composed of the first low pass filter and the high pass filter or the band pass filter is formed on one module substrate. In this case, the duplexer circuit of the present invention can be easily fabricated by using a duplexer module composed of a multilayer substrate or a duplexer module formed by mounting electronic components such as capacitors on a multilayer substrate.
而且，雙工器之第1低通濾波器較佳為T型濾波器，該T型濾波器具備連接於第1端子之第1電感器、連接於第1電感器與第2端子之間之第2電感器、及連接於第1電感器和第2電感器之連接點與接地之間的電容器。該情況下，利用T型濾波器，可容易地形成第1低通濾波器所要求之通過特性。 Further, the first low pass filter of the duplexer is preferably a T-type filter including a first inductor connected to the first terminal and connected between the first inductor and the second terminal. The second inductor and a capacitor connected between the connection point of the first inductor and the second inductor and the ground. In this case, the pass characteristics required for the first low pass filter can be easily formed by the T-type filter.
而且，較佳為，上述第2電感器與電容器並聯連接，第2電感器與該電容器形成LC共振器。該情況下，利用該LC共振器，可分別將由第1低通濾波器及第2低通濾波器形成之通過頻帶特性、及由第1低通濾波器及第3低通濾波器形成之通過頻帶特性改善得更優異。 Further, preferably, the second inductor is connected in parallel with the capacitor, and the second inductor forms an LC resonator with the capacitor. In this case, the LC resonator can respectively pass the passband characteristics formed by the first low pass filter and the second low pass filter, and pass through the first low pass filter and the third low pass filter. The band characteristics are improved more excellently.
而且，較佳為，上述LC共振器之共振頻率設於高通濾波器或帶通濾波器之通過頻帶內。其原因在於，該情況下，能利用該LC共振器來抑制接收信號經過第1低通濾波器及第2低通濾波器或經過第1低通濾波器及第3低通濾波器而干擾發送電路。 Further, it is preferable that the resonance frequency of the LC resonator is set in a pass band of the high pass filter or the band pass filter. This is because, in this case, the LC resonator can be used to suppress the reception signal from passing through the first low-pass filter and the second low-pass filter, or passing through the first low-pass filter and the third low-pass filter to cause interference transmission. Circuit.
進而，較佳為，第3低通濾波器之截止頻率高於第2低通濾波器之截止頻率，第3低通濾波器具備至少1個LC共振器，且該LC共振 器之共振頻率設於高通濾波器或帶通濾波器之通過頻帶內。該情況下，能利用該LC共振器來抑制接收信號經過第1低通濾波器及第3低通濾波器而干擾發送電路。 Furthermore, preferably, the cutoff frequency of the third low pass filter is higher than the cutoff frequency of the second low pass filter, and the third low pass filter includes at least one LC resonator, and the LC resonance The resonant frequency of the device is set in the pass band of the high pass filter or the band pass filter. In this case, the LC resonator can be used to suppress the received signal from passing through the first low pass filter and the third low pass filter and interfering with the transmitting circuit.
可將本發明之雙工器電路構成於由陶瓷或樹脂等構成之模組基板，製作雙工器電路模組。 The duplexer circuit of the present invention can be formed on a module substrate made of ceramic or resin to form a duplexer circuit module.
本發明之雙工器電路中，能抑制第1開關與高通濾波器或帶通濾波器之間的多餘之共振，高通濾波器或帶通濾波器之通過頻帶內不會產生多餘衰減。 In the duplexer circuit of the present invention, unnecessary resonance between the first switch and the high-pass filter or the band-pass filter can be suppressed, and no excessive attenuation occurs in the pass band of the high-pass filter or the band-pass filter.
而且，本發明之雙工器電路中具備由第1低通濾波器與第2低通濾波器構成之發送濾波器電路、及由第1低通濾波器與第3低通濾波器構成之發送濾波器電路該等兩個發送濾波器電路，兩者中之一部分分別兼用第1低通濾波器，故而，能減少製作雙工器電路時所需之電子零件個數。 Further, the duplexer circuit of the present invention includes a transmission filter circuit including a first low pass filter and a second low pass filter, and a transmission including a first low pass filter and a third low pass filter. Filter Circuits These two transmission filter circuits, each of which uses a first low-pass filter, can reduce the number of electronic components required to fabricate a duplexer circuit.
X‧‧‧共用端子 X‧‧‧share terminal
Y‧‧‧發送端子 Y‧‧‧Transmission terminal
Z‧‧‧接收端子 Z‧‧‧ receiving terminal
DPLX‧‧‧雙工器 DPLX‧‧‧Duplexer
T1‧‧‧第1端子 T1‧‧‧1st terminal
T2‧‧‧第2端子 T2‧‧‧2nd terminal
T3‧‧‧第3端子 T3‧‧‧3rd terminal
LPF1‧‧‧第1低通濾波器 LPF1‧‧‧1st low pass filter
HPF‧‧‧高通濾波器 HPF‧‧‧ high-pass filter
BPF‧‧‧帶通濾波器 BPF‧‧‧ bandpass filter
LPF2‧‧‧第2低通濾波器 LPF2‧‧‧2nd low pass filter
LPF3‧‧‧第3低通濾波器 LPF3‧‧‧3rd low pass filter
SW1‧‧‧第1開關 SW1‧‧‧1st switch
SW2‧‧‧第2開關 SW2‧‧‧2nd switch
圖1係表示第1實施形態之雙工器電路100之等效電路圖。 Fig. 1 is an equivalent circuit diagram showing a duplexer circuit 100 of the first embodiment.
圖2(A)、(B)分別係表示選擇第2低通濾波器LPF2時雙工器電路100之頻率特性的圖表。其中，圖2(A)中將圖2(B)局部放大表示。 2(A) and 2(B) are graphs showing the frequency characteristics of the duplexer circuit 100 when the second low pass filter LPF2 is selected. 2(B) is partially enlarged and shown in FIG. 2(A).
圖3(A)、(B)分別係表示選擇第3低通濾波器LPF3時雙工器電路100之頻率特性的圖表。其中，圖3(A)中將圖3(B)局部放大表示。 3(A) and 3(B) are graphs showing the frequency characteristics of the duplexer circuit 100 when the third low pass filter LPF3 is selected. In FIG. 3(A), FIG. 3(B) is partially enlarged.
圖4係表示第2實施形態之雙工器電路200之方塊圖。 Fig. 4 is a block diagram showing a duplexer circuit 200 of the second embodiment.
圖5係表示專利文獻1中揭示之雙工器電路300之等效電路圖。 FIG. 5 is an equivalent circuit diagram showing the duplexer circuit 300 disclosed in Patent Document 1.
圖6(A)係雙工器電路300之第1低通濾波器LPF1之等效電路圖。圖6(B)係雙工器電路300之第2低通濾波器LPF2之等效電路圖。圖6(C)係雙工器電路300之高通濾波器HPF之等效電路圖。 6(A) is an equivalent circuit diagram of the first low pass filter LPF1 of the duplexer circuit 300. 6(B) is an equivalent circuit diagram of the second low pass filter LPF2 of the duplexer circuit 300. Fig. 6(C) is an equivalent circuit diagram of the high pass filter HPF of the duplexer circuit 300.
圖7(A)、(B)分別係表示選擇第1低通濾波器LPF1時雙工器電路300之頻率特性的圖表。其中，圖7(A)中將圖7(B)局部放大表示。 7(A) and 7(B) are graphs showing the frequency characteristics of the duplexer circuit 300 when the first low pass filter LPF1 is selected. Here, FIG. 7(B) is partially enlarged and shown in FIG. 7(A).
圖8(A)、(B)分別係表示選擇第2低通濾波器LPF2時雙工器電路300之頻率特性的圖表。其中，圖8(A)中將圖8(B)局部放大表示。 8(A) and 8(B) are graphs showing the frequency characteristics of the duplexer circuit 300 when the second low pass filter LPF2 is selected. Here, FIG. 8(B) is partially enlarged and shown in FIG. 8(B).
以下，參照圖式而說明用以實施本發明之形態。 Hereinafter, embodiments for carrying out the invention will be described with reference to the drawings.
再者，各實施形態係例示性地表示本發明之實施形態，但本發明並不限於實施形態之內容。而且，亦可將不同實施形態中記載之內容加以組合而實施，此時之實施內容亦屬本發明。而且，圖式係用於幫助理解實施形態，有時未必嚴格地描繪。例如，所描繪之構成要素或構成要素間之尺寸比率有時並不與說明書中記載之其等之尺寸比率一致。而且，圖式中，有時省略說明書中記載之構成要素，有時減少其個數而進行描繪。 Furthermore, each embodiment exemplarily shows an embodiment of the present invention, but the present invention is not limited to the embodiment. Further, the contents described in the different embodiments may be combined and implemented, and the implementation at this time is also the present invention. Moreover, the drawings are used to help understand the embodiments and may not be strictly depicted. For example, the dimensional ratio between the constituent elements or constituent elements drawn may not match the dimensional ratios described in the specification. Further, in the drawings, the constituent elements described in the specification may be omitted, and the number may be reduced and drawn.
圖1中表示第1實施形態之雙工器電路100之等效電路。 Fig. 1 shows an equivalent circuit of the duplexer circuit 100 of the first embodiment.
雙工器電路100具備共用端子X、發送端子Y及接收端子Z。 The duplexer circuit 100 includes a common terminal X, a transmission terminal Y, and a reception terminal Z.
而且，雙工器電路100具備雙工器DPLX。雙工器DPLX具備第1端子T1、第2端子T2、第3端子T3、第1低通濾波器LPF1及高通濾波器HPF。雙工器DPLX中，於第1端子T1與第2端子T2之間***有 第1低通濾波器LPF1。而且，雙工器DPLX中，於第1端子T1與第3端子T3之間***有高通濾波器HPF。再者，雙工器DPLX中，第1低通濾波器LPF1與高通濾波器HPF構成於一個模組基板上。再者，亦可代替高通濾波器HPF而使用帶通濾波器BPF(未圖示)。 Further, the duplexer circuit 100 is provided with a duplexer DPLX. The duplexer DPLX includes a first terminal T1, a second terminal T2, a third terminal T3, a first low-pass filter LPF1, and a high-pass filter HPF. In the duplexer DPLX, a plug is inserted between the first terminal T1 and the second terminal T2. The first low pass filter LPF1. Further, in the duplexer DPLX, a high-pass filter HPF is inserted between the first terminal T1 and the third terminal T3. Further, in the duplexer DPLX, the first low pass filter LPF1 and the high pass filter HPF are formed on one module substrate. Further, a band pass filter BPF (not shown) may be used instead of the high pass filter HPF.
再者，雙工器DPLX之第1低通濾波器LPF1不僅作為低通濾波器發揮功能，而且亦作為第1開關SW1與高通濾波器HPF之整合電路而發揮功能。 Further, the first low-pass filter LPF1 of the duplexer DPLX functions not only as a low-pass filter but also as an integrated circuit of the first switch SW1 and the high-pass filter HPF.
而且，雙工器電路100具備第2低通濾波器LPF2與第3低通濾波器LPF3。 Further, the duplexer circuit 100 includes a second low pass filter LPF2 and a third low pass filter LPF3.
進而，雙工器電路100具備連動地切換之第1開關SW1及第2開關SW2。第1開關SW1及第2開關SW2可使用例如SPDT(Single Pole Double Throw)開關。第1開關SW1與第2開關SW2係連動地切換。 Further, the duplexer circuit 100 includes a first switch SW1 and a second switch SW2 that are switched in conjunction with each other. For example, an SPDT (Single Pole Double Throw) switch can be used for the first switch SW1 and the second switch SW2. The first switch SW1 and the second switch SW2 are switched in conjunction with each other.
雙工器電路100中，雙工器DPLX之第1端子T1連接於共用端子X。而且，雙工器DPLX之第2端子T2連接於第1開關SW1。而且，雙工器DPLX之第3端子T3連接於接收端子Z。進而，第2開關SW2連接於發送端子Y。 In the duplexer circuit 100, the first terminal T1 of the duplexer DPLX is connected to the common terminal X. Further, the second terminal T2 of the duplexer DPLX is connected to the first switch SW1. Further, the third terminal T3 of the duplexer DPLX is connected to the receiving terminal Z. Further, the second switch SW2 is connected to the transmission terminal Y.
雙工器電路100中，藉由連動地切換第1開關SW1及第2開關SW2，而使第2低通濾波器LPF2及第3低通濾波器LPF3中之任一者擇一性地連接於第1開關SW1與第2開關SW2之間。 In the duplexer circuit 100, by switching the first switch SW1 and the second switch SW2 in conjunction, one of the second low pass filter LPF2 and the third low pass filter LPF3 is selectively connected to The first switch SW1 is connected to the second switch SW2.
第1低通濾波器LPF1係由T型濾波器構成，該T型濾波器中，2個電感器L1(第1電感器)、電感器L2(第2電感器)串聯連接，於電感器L1和電感器L2之連接點與接地之間連接有電容器C1。而且，電感 器L2與電容器C2並聯連接，由電感器L2與電容器C2形成LC並聯共振器LC1。 The first low-pass filter LPF1 is composed of a T-type filter. In the T-type filter, two inductors L1 (first inductor) and inductor L2 (second inductor) are connected in series to the inductor L1. A capacitor C1 is connected between the connection point of the inductor L2 and the ground. Moreover, the inductance The L2 is connected in parallel with the capacitor C2, and the LC parallel resonator LC1 is formed by the inductor L2 and the capacitor C2.
高通濾波器HPF中，5個電容器C18~C22與電感器L12串聯連接。再者，由電容器C22與電感器L12形成LC串聯共振器LC9。並且，於電容器C18和電容器C19之連接點與接地之間，連接有由電感器L13與電容器C23構成之LC串聯共振器LC10。於電容器C19和電容器C20之連接點與接地之間，連接有由電感器L14與電容器C24構成之LC串聯共振器LC11。於電容器C20和電容器C21之連接點與接地之間，連接有由電感器L15與電容器C25構成之LC串聯共振器LC12。於電容器C21和電容器C22之連接點與接地之間，連接有由電感器L16與電容器C26構成之LC串聯共振器LC13。於電感器L12和第3端子T3之連接點與接地之間，連接有由電感器L17與電容器C27構成之LC並聯共振器LC14。 In the high-pass filter HPF, five capacitors C18 to C22 are connected in series with the inductor L12. Furthermore, the LC series resonator LC9 is formed by the capacitor C22 and the inductor L12. Further, an LC series resonator LC10 composed of an inductor L13 and a capacitor C23 is connected between the connection point of the capacitor C18 and the capacitor C19 and the ground. An LC series resonator LC11 composed of an inductor L14 and a capacitor C24 is connected between a connection point of the capacitor C19 and the capacitor C20 and the ground. An LC series resonator LC12 composed of an inductor L15 and a capacitor C25 is connected between a connection point of the capacitor C20 and the capacitor C21 and the ground. An LC series resonator LC13 composed of an inductor L16 and a capacitor C26 is connected between a connection point of the capacitor C21 and the capacitor C22 and the ground. An LC parallel resonator LC14 composed of an inductor L17 and a capacitor C27 is connected between the connection point of the inductor L12 and the third terminal T3 and the ground.
高通濾波器HPF係藉由選定電感器及電容器之常數而將截止頻率設定為108MHz。 The high pass filter HPF sets the cutoff frequency to 108 MHz by selecting the constant of the inductor and capacitor.
第2低通濾波器LPF2中之5個電感器L3~L7係串聯連接。並且，於電感器L3和電感器L4之連接點與接地之間，連接有由電感器L8與電容器C3構成之LC串聯共振器LC2。於電感器L4和電感器L5之連接點與接地之間，連接有電容器C4。於電感器L5和電感器L6之連接點與接地之間，連接有電容器C5。於電感器L6和電感器L7之連接點與接地之間，連接有電容器C6。於電感器L7和第2開關SW2之連接點與接地之間，連接有電容器C7。 The five inductors L3 to L7 of the second low-pass filter LPF2 are connected in series. Further, an LC series resonator LC2 composed of an inductor L8 and a capacitor C3 is connected between the connection point of the inductor L3 and the inductor L4 and the ground. A capacitor C4 is connected between the connection point of the inductor L4 and the inductor L5 and the ground. A capacitor C5 is connected between the connection point of the inductor L5 and the inductor L6 and the ground. A capacitor C6 is connected between the connection point of the inductor L6 and the inductor L7 and the ground. A capacitor C7 is connected between the connection point of the inductor L7 and the second switch SW2 and the ground.
而且，第2低通濾波器LPF2中，電感器L5與電容器C8並 聯連接，由電感器L5與電容器C8形成LC並聯共振器LC3。電感器L6與電容器C9並聯連接，由電感器L6與電容器C9形成LC並聯共振器LC4。電感器L7與電容器C10並聯連接，由電感器L7與電容器C10形成LC並聯共振器LC5。 Further, in the second low pass filter LPF2, the inductor L5 and the capacitor C8 are Connected in series, the LC parallel resonator LC3 is formed by the inductor L5 and the capacitor C8. The inductor L6 is connected in parallel with the capacitor C9, and the LC parallel resonator LC4 is formed by the inductor L6 and the capacitor C9. The inductor L7 is connected in parallel with the capacitor C10, and the LC parallel resonator LC5 is formed by the inductor L7 and the capacitor C10.
第2低通濾波器LPF2與第1低通濾波器連接時，兩者均成為具備42MHz之截止頻率的低通濾波器。 When the second low-pass filter LPF2 is connected to the first low-pass filter, both of them become low-pass filters having a cutoff frequency of 42 MHz.
第3低通濾波器LPF3中之3個電感器L9~L11係串聯連接。並且，於第1開關SW1和電感器L9之連接點與接地之間，連接有電容器C11。於電感器L9和電感器L10之連接點與接地之間，連接有電容器C12。於電感器L10和電感器L11之連接點與接地之間，連接有電容器C13。於電感器L11和第2開關SW2之連接點與接地之間，連接有電容器C14。 The three inductors L9 to L11 of the third low-pass filter LPF3 are connected in series. Further, a capacitor C11 is connected between the connection point of the first switch SW1 and the inductor L9 and the ground. A capacitor C12 is connected between the connection point of the inductor L9 and the inductor L10 and the ground. A capacitor C13 is connected between the connection point of the inductor L10 and the inductor L11 and the ground. A capacitor C14 is connected between the connection point of the inductor L11 and the second switch SW2 and the ground.
而且，第3低通濾波器LPF3中，電感器L9與電容器C15並聯連接，由電感器L9與電容器C15形成LC並聯共振器LC6。電感器L10與電容器C16並聯連接，由電感器L10與電容器C16形成LC並聯共振器LC7。電感器L11與電容器C17並聯連接，由電感器L11與電容器C17形成LC並聯共振器LC8。 Further, in the third low-pass filter LPF3, the inductor L9 and the capacitor C15 are connected in parallel, and the LC parallel resonator LC6 is formed by the inductor L9 and the capacitor C15. The inductor L10 is connected in parallel with the capacitor C16, and the LC parallel resonator LC7 is formed by the inductor L10 and the capacitor C16. The inductor L11 is connected in parallel with the capacitor C17, and the LC parallel resonator LC8 is formed by the inductor L11 and the capacitor C17.
第3低通濾波器LPF3與第1低通濾波器連接時，兩者均成為具有85MHz之截止頻率的低通濾波器。 When the third low-pass filter LPF3 is connected to the first low-pass filter, both of them become low-pass filters having a cutoff frequency of 85 MHz.
表1中表示形成於第1低通濾波器LPF1中之LC並聯共振器LC1、形成於第2低通濾波器LPF2中之LC串聯共振器LC2、LC並聯共振器LC3~LC5、形成於第3低通濾波器LPF3中之LC並聯共振器LC6~LC8、形成於高通濾波器HPF中之LC串聯共振器LC9~LC13、LC並聯共 振器LC14各自的共振頻率。 Table 1 shows the LC parallel resonator LC1 formed in the first low-pass filter LPF1, the LC series resonator LC2 and the LC parallel resonator LC3 to LC5 formed in the second low-pass filter LPF2, and is formed in the third LC parallel resonator LC6~LC8 in low-pass filter LPF3, LC series resonator LC9~LC13, LC formed in high-pass filter HPF The respective resonant frequencies of the vibrators LC14.
本實施形態之雙工器電路100中，將形成於第1低通濾波器LPF中之LC並聯共振器LC1之共振頻率設為133MHz，而處於高通濾波器HPF之通過頻帶(108MHz~)內。結果，雙工器電路100中，利用LC並聯共振器LC1，抑制接收信號經由第1低通濾波器LPF1及第2低通濾波器LPF2、或、第1低通濾波器LPF1及第3低通濾波器LPF3而干擾發送電路。 In the duplexer circuit 100 of the present embodiment, the resonance frequency of the LC parallel resonator LC1 formed in the first low-pass filter LPF is 133 MHz, and is within the pass band (108 MHz) of the high-pass filter HPF. As a result, in the duplexer circuit 100, the LC parallel resonator LC1 is used to suppress the reception signal from passing through the first low pass filter LPF1 and the second low pass filter LPF2, or the first low pass filter LPF1 and the third low pass. The filter LPF3 interferes with the transmitting circuit.
而且，雙工器電路100中，截止頻率高於第2低通濾波器LPF2之第3低通濾波器LPF3具備3個LC並聯共振器LC6~LC8，將其等之共振頻率設為113MHz~187MHz，而處於高通濾波器HPF之通過頻帶(108MHz~)內。結果，雙工器電路100中，利用LC並聯共振器LC6~LC8，抑制接收信號經由第1低通濾波器LPF1及第3低通濾波器LPF3而干擾發送電路。 Further, in the duplexer circuit 100, the third low-pass filter LPF3 having a cutoff frequency higher than that of the second low-pass filter LPF2 includes three LC parallel resonators LC6 to LC8, and the resonance frequency thereof is set to 113 MHz to 187 MHz. It is in the pass band (108MHz~) of the high-pass filter HPF. As a result, in the duplexer circuit 100, the LC parallel resonators LC6 to LC8 are used to suppress the reception signal from interfering with the transmission circuit via the first low pass filter LPF1 and the third low pass filter LPF3.
本實施形態之雙工器電路100將共用端子X連接於提供內容之運營商之線纜，將發送端子Y連接於發送電路，將接收端子Z連接於接收電路，藉此，可用作對應於DOCSIS(註冊商標)3.0與DOCSIS3.1兩者之雙工器電路。 The duplexer circuit 100 of the present embodiment connects the common terminal X to the cable of the operator providing the content, connects the transmission terminal Y to the transmission circuit, and connects the reception terminal Z to the reception circuit, whereby it can be used as the corresponding A duplexer circuit of both DOCSIS (registered trademark) 3.0 and DOCSIS 3.1.
即，於第1開關SW1與第2開關SW2之間連接有第2低通濾波器LPF2時，由第1低通濾波器LPF1與第2低通濾波器LPF2構成具有42MHz之截止頻率的低通濾波器。雙工器電路100可經由該低通濾波器而依照DOCSIS3.0進行發送。 In other words, when the second low-pass filter LPF2 is connected between the first switch SW1 and the second switch SW2, the first low-pass filter LPF1 and the second low-pass filter LPF2 form a low-pass having a cutoff frequency of 42 MHz. filter. The duplexer circuit 100 can transmit in accordance with DOCSIS 3.0 via the low pass filter.
而且，於第1開關SW1與第2開關SW2之間連接有第3低通濾波器LPF3時，由第1低通濾波器LPF1與第3低通濾波器LPF3構成具有85MHz之截止頻率的低通濾波器。雙工器電路100可經由該低通濾波器而依照DOCSIS3.1進行發送。 Further, when the third low-pass filter LPF3 is connected between the first switch SW1 and the second switch SW2, the first low-pass filter LPF1 and the third low-pass filter LPF3 form a low-pass having a cutoff frequency of 85 MHz. filter. The duplexer circuit 100 can transmit in accordance with DOCSIS 3.1 via the low pass filter.
圖2(A)、(B)中表示於第1開關SW1與第2開關SW2之間連接有第2低通濾波器LPF2時(依照DOCSIS3.0)之頻率特性。而且，圖3(A)、(B)中表示於第1開關SW1與第2開關SW2之間連接有第3低通濾波器LPF3時(依照DOCSIS3.1)之頻率特性。再者，圖2(A)中將圖2(B)局部放大表示，圖3(A)中將圖3(B)局部放大表示。 2(A) and 2(B) show the frequency characteristics when the second low-pass filter LPF2 is connected between the first switch SW1 and the second switch SW2 (in accordance with DOCSIS 3.0). Further, in FIGS. 3(A) and 3(B), the frequency characteristics when the third low-pass filter LPF3 is connected between the first switch SW1 and the second switch SW2 (in accordance with DOCSIS 3.1) are shown. Further, Fig. 2(B) is partially enlarged in Fig. 2(A), and Fig. 3(B) is partially enlarged in Fig. 3(A).
根據圖2(B)、圖3(B)可知，雙工器電路100中，於第1開關SW1與第2開關SW2之間連接有第2低通濾波器LPF2、第3低通濾波器LPF3中之任一者的情況下，高通濾波器HPF之通過頻帶內均未產生多餘衰減。即，認為，雙工器電路100中，因第1低通濾波器LPF1作為第1開關SW1與高通濾波器HPF之間之整合電路發揮功能，故而，第1開關SW1 與高通濾波器HPF之間不會產生多餘之共振，高通濾波器HPF之通過頻帶內不會產生多餘衰減。 2(B) and 3(B), in the duplexer circuit 100, the second low pass filter LPF2 and the third low pass filter LPF3 are connected between the first switch SW1 and the second switch SW2. In either case, no excess attenuation occurs in the pass band of the high pass filter HPF. In other words, in the duplexer circuit 100, since the first low-pass filter LPF1 functions as an integrated circuit between the first switch SW1 and the high-pass filter HPF, the first switch SW1 is assumed. No excess resonance occurs between the high-pass filter HPF and the high-pass filter HPF does not generate unwanted attenuation in the pass band.
雙工器電路100中具備由第1低通濾波器LPF1與第2低通濾波器LPF2構成之發送濾波器電路、及由第1低通濾波器LPF1與第3低通濾波器LPF3構成之發送濾波器電路該等兩個發送濾波器電路，但兩者中之一部分分別兼用第1低通濾波器LPF1，故而亦具有減少所需之電子零件個數的效果。 The duplexer circuit 100 includes a transmission filter circuit including a first low pass filter LPF1 and a second low pass filter LPF2, and a transmission including a first low pass filter LPF1 and a third low pass filter LPF3. The filter circuit has two transmission filter circuits, but one of the two uses the first low-pass filter LPF1, and therefore has the effect of reducing the number of required electronic components.
若使用本實施形態之雙工器電路100，則能對應於DOCSIS3.0與DOCSIS3.1兩個版本進行通訊。 When the duplexer circuit 100 of the present embodiment is used, communication can be performed in accordance with two versions of DOCSIS 3.0 and DOCSIS 3.1.
圖4中表示第2實施形態之雙工器電路200之方塊圖。 Fig. 4 is a block diagram showing the duplexer circuit 200 of the second embodiment.
第1實施形態之雙工器電路100中，雙工器DPLX具備高通濾波器HPF。 In the duplexer circuit 100 of the first embodiment, the duplexer DPLX includes a high-pass filter HPF.
第2實施形態之雙工器電路200中，雙工器DPLX具備帶通濾波器BPF來代替高通濾波器HPF。雙工器電路200之其他構成均與第1實施形態之雙工器電路100相同。 In the duplexer circuit 200 of the second embodiment, the duplexer DPLX is provided with a band pass filter BPF instead of the high pass filter HPF. The other configuration of the duplexer circuit 200 is the same as that of the duplexer circuit 100 of the first embodiment.
雙工器電路200中，第1低通濾波器LPF1亦作為第1開關SW1與帶通濾波器BPF之間之整合電路發揮功能，故而，第1開關SW1與帶通濾波器BPF之間不會產生多餘之共振，帶通濾波器BPF之通過頻帶內不會產生多餘衰減。 In the duplexer circuit 200, the first low pass filter LPF1 also functions as an integrated circuit between the first switch SW1 and the band pass filter BPF, so that the first switch SW1 and the band pass filter BPF do not exist. Excessive resonance is generated, and no unwanted attenuation occurs in the pass band of the band pass filter BPF.
以上，已對第1實施形態、第2實施形態之雙工器電路100、200進行說明。然而，本發明之雙工器電路並不限於上述內容，可根據發明 之宗旨施加各種變形。 The duplexer circuits 100 and 200 according to the first embodiment and the second embodiment have been described above. However, the duplexer circuit of the present invention is not limited to the above, and may be in accordance with the invention The purpose is to apply various deformations.
例如，第1低通濾波器LPF1、第2低通濾波器LPF2、第3低通濾波器LPF3、高通濾波器HPF(或帶通濾波器BPF)之各電路構成係任意，並不限於上述內容。而且，設定之各截止頻率亦為任意，並不限於上述內容。 For example, the circuit configurations of the first low pass filter LPF1, the second low pass filter LPF2, the third low pass filter LPF3, and the high pass filter HPF (or the band pass filter BPF) are arbitrary, and are not limited to the above. . Further, the cutoff frequencies set are also arbitrary, and are not limited to the above.
而且，實施形態中，係以DOCSIS之版本3.0及版本3.1為例進行說明，但本發明之雙工器電路所使用之通訊規格並不限於DOCSIS。而且，即便使用DOCSIS，亦不限於版本3.0及版本3.1。 Further, in the embodiment, DOCSIS version 3.0 and version 3.1 are taken as an example, but the communication specifications used in the duplexer circuit of the present invention are not limited to DOCSIS. Moreover, even if DOCSIS is used, it is not limited to version 3.0 and version 3.1.
X‧‧‧共用端子 X‧‧‧share terminal
Y‧‧‧發送端子 Y‧‧‧Transmission terminal
Z‧‧‧接收端子 Z‧‧‧ receiving terminal
DPLX‧‧‧雙工器 DPLX‧‧‧Duplexer
T1‧‧‧第1端子 T1‧‧‧1st terminal
T2‧‧‧第2端子 T2‧‧‧2nd terminal
T3‧‧‧第3端子 T3‧‧‧3rd terminal
LPF1‧‧‧第1低通濾波器 LPF1‧‧‧1st low pass filter
LPF2‧‧‧第2低通濾波器 LPF2‧‧‧2nd low pass filter
LPF3‧‧‧第3低通濾波器 LPF3‧‧‧3rd low pass filter
L1~L17‧‧‧電感器 L1~L17‧‧‧Inductors
LC1~LC14‧‧‧LC共振器 LC1~LC14‧‧‧LC resonator
C1~C27‧‧‧電容器 C1~C27‧‧‧ capacitor
HPF‧‧‧高通濾波器 HPF‧‧‧ high-pass filter
BPF‧‧‧帶通濾波器 BPF‧‧‧ bandpass filter
SW1‧‧‧第1開關 SW1‧‧‧1st switch
SW2‧‧‧第2開關 SW2‧‧‧2nd switch
100‧‧‧雙工器電路 100‧‧‧Duplexer circuit
Claims (10)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015253378 | 2015-12-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW201724735A TW201724735A (en) | 2017-07-01 |
| TWI601379B true TWI601379B (en) | 2017-10-01 |
Family
ID=59090301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW105132724A TWI601379B (en) | 2015-12-25 | 2016-10-11 | Duplexer circuit and duplexer circuit module |
Country Status (2)
| Country | Link |
|---|---|
| TW (1) | TWI601379B (en) |
| WO (1) | WO2017110723A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102260375B1 (en) * | 2019-04-05 | 2021-06-03 | 삼성전기주식회사 | Front end module |
| US11387556B2 (en) | 2019-04-05 | 2022-07-12 | Samsung Electro-Mechanics Co., Ltd. | Frontend module |
| CN114928342B (en) * | 2022-06-07 | 2024-02-06 | 江南大学 | High-isolation low-loss integrated passive miniature duplexer and application thereof |
| CN116260417B (en) * | 2023-05-16 | 2023-07-11 | 成都频岢微电子有限公司 | Single-resonator filter, multi-resonator filter and radio frequency front-end module |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6765456B2 (en) * | 2001-12-17 | 2004-07-20 | Oki Electric Industry Co., Ltd. | Surface acoustic wave duplexer and portable communication device using the same |
| US20080272854A1 (en) * | 2005-08-05 | 2008-11-06 | Hitachi Media Electronics Co., Ltd. | Antenna duplexer and wireless terminal using the same |
| US20130051287A1 (en) * | 2011-08-22 | 2013-02-28 | Murata Manufacturing Co., Ltd. | Radio-frequency front-end module |
| US20130273861A1 (en) * | 2012-04-11 | 2013-10-17 | Qualcomm Incorporated | Devices for switching an antenna |
| TW201611561A (en) * | 2014-09-01 | 2016-03-16 | 鋐寶科技股份有限公司 | Switchable diplexer |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030022631A1 (en) * | 2001-07-13 | 2003-01-30 | Rhodes Robert Andrew | Multi-mode bidirectional communications device including a diplexer having a switchable notch filter |
| US7020186B2 (en) * | 2001-07-13 | 2006-03-28 | Thomson Licensing | Multi-mode bi-directional communications device including a diplexer having switchable low pass filters |
| JP4221205B2 (en) * | 2001-11-12 | 2009-02-12 | パナソニック株式会社 | Diplexer and high-frequency switch using the same |
| JP2006128881A (en) * | 2004-10-27 | 2006-05-18 | Kyocera Corp | Diplexer |
| JP2006332980A (en) * | 2005-05-25 | 2006-12-07 | Alps Electric Co Ltd | Triplexer circuit |
-
2016
- 2016-10-11 TW TW105132724A patent/TWI601379B/en active
- 2016-12-19 WO PCT/JP2016/087736 patent/WO2017110723A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6765456B2 (en) * | 2001-12-17 | 2004-07-20 | Oki Electric Industry Co., Ltd. | Surface acoustic wave duplexer and portable communication device using the same |
| US20080272854A1 (en) * | 2005-08-05 | 2008-11-06 | Hitachi Media Electronics Co., Ltd. | Antenna duplexer and wireless terminal using the same |
| US20130051287A1 (en) * | 2011-08-22 | 2013-02-28 | Murata Manufacturing Co., Ltd. | Radio-frequency front-end module |
| US20130273861A1 (en) * | 2012-04-11 | 2013-10-17 | Qualcomm Incorporated | Devices for switching an antenna |
| TW201611561A (en) * | 2014-09-01 | 2016-03-16 | 鋐寶科技股份有限公司 | Switchable diplexer |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201724735A (en) | 2017-07-01 |
| WO2017110723A1 (en) | 2017-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI601379B (en) | Duplexer circuit and duplexer circuit module | |
| US10079587B2 (en) | Phase shifter, impedance matching circuit, multi/demultiplexer, and communication terminal apparatus | |
| JP5794365B2 (en) | Cable and communication equipment | |
| US10200012B2 (en) | High-frequency filter, front-end circuit, and communication apparatus | |
| JP6365776B2 (en) | High frequency front end circuit | |
| WO2012172909A1 (en) | Demultiplexer | |
| JP5818033B2 (en) | Diplexer | |
| US11956069B2 (en) | Multiplexer, filter, and communication device | |
| JP2017503401A (en) | Front-end circuit and method of operation of front-end circuit | |
| JP4627791B2 (en) | Balance-unbalance conversion circuit | |
| JP2014121091A5 (en) | ||
| US9007145B2 (en) | High-frequency signal balancing multiplexer | |
| JP6352418B2 (en) | RF antenna switch and method of operating this antenna switch | |
| JP2013243600A (en) | Triplexer | |
| TWI638540B (en) | Duplexer module with switch and duplexer module | |
| JP2004248121A (en) | Band path filter | |
| CN110022165B (en) | Radio frequency transceiver circuit with distributed inductance and method thereof | |
| KR101010214B1 (en) | Diplexer using asymmetric impedance filter | |
| JP3207413U (en) | Low-pass filter with stopband noise suppression | |
| JP2022144739A (en) | band elimination filter | |
| WO2017065759A1 (en) | A multiplexer with switchable filter | |
| JP3207455U (en) | Micro diplexer with improved separation and loss | |
| JP2011015064A (en) | Diplexer circuit | |
| KR20020069405A (en) | Radio filter of combline structure with frequency cut off circuit and method | |
| TWM492581U (en) | High frequency restrain multiplexer |