KR20020093281A - Diplexer circuit for dual band communication device - Google Patents

Diplexer circuit for dual band communication device Download PDF

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Publication number
KR20020093281A
KR20020093281A KR1020010031750A KR20010031750A KR20020093281A KR 20020093281 A KR20020093281 A KR 20020093281A KR 1020010031750 A KR1020010031750 A KR 1020010031750A KR 20010031750 A KR20010031750 A KR 20010031750A KR 20020093281 A KR20020093281 A KR 20020093281A
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South Korea
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frequency band
capacitor
band
high frequency
diplexer
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KR1020010031750A
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Korean (ko)
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차승훈
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엘지전자 주식회사
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Publication of KR20020093281A publication Critical patent/KR20020093281A/en

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    • 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
    • H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H04B1/0053—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
    • H04B1/0057—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using diplexing or multiplexing filters for selecting the desired band
    • 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
    • H03H7/01—Frequency selective two-port networks
    • H03H7/0115—Frequency selective two-port networks comprising only inductors and capacitors

Abstract

PURPOSE: A diplexer circuit of a dual band communication terminal is provided to be configured in a discrete system, thereby improving insertion loss in a high frequency and increasing band selection. CONSTITUTION: A resonant circuit(100) is composed of a capacitor(C1) and an inductor(L1). The capacitor(C1) receives a wideband frequency signal to reflect other frequencies except a low frequency band. A low frequency band path connects a capacitor(C3) grounded on one side of the resonant circuit(100) in parallel, and separates a low frequency band. A short resonant circuit(200) is composed of a capacitor(C2) and an inductor(L2). The capacitor(C2) reflects other frequencies except a high frequency band from the wideband frequency signal. A high frequency band path is connected to an open resonator for improving selection in a frequency band outputted through the short resonant circuit(200), and separates the high frequency band. A shunt capacitor(C5) is located in an antenna to receive a wideband frequency band.

Description

이중밴드 통신 단말기의 다이플렉서 회로{DIPLEXER CIRCUIT FOR DUAL BAND COMMUNICATION DEVICE}DIPLEXER CIRCUIT FOR DUAL BAND COMMUNICATION DEVICE}

본 발명은 이중밴드 통신 단말기의 다이플렉서 회로에 관한 것으로, 특히 이중밴드(Dual band)에서 사용할 수 있도록 구성된 통신 단말기에 있어서, 다이플렉서 회로의 성능을 최적화시키기 위한 이중밴드 통신 단말기의 다이플렉서 회로에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diplexer circuit of a dual band communication terminal. In particular, in a communication terminal configured to be used in a dual band, a diplexer of a dual band communication terminal for optimizing the performance of the diplexer circuit is provided. It is about a lexer circuit.

종래에 사용되고 있는 다이플렉서는 크게 4가지 방식(Band Splitters, Wide Bandpass Diplexer & Triplexers, Narrow Bandpass Diplexer, Quadrature Diplexer)이 주로 사용되고 있다.Conventionally used diplexers are mainly used four methods (Band Splitters, Wide Bandpass Diplexer & Triplexers, Narrow Bandpass Diplexer, Quadrature Diplexer).

현재 이중밴드 통신 단말기에서 사용되고 있는 다이플렉서는 거의 칩(Chip)으로 성능이 구현되어지고 있는 실정이다.Currently, a diplexer used in a dual band communication terminal is almost implemented with a chip.

이때, 상기 다이플렉서에서 사용되는 주파수 밴드는 고주파 대역(1700MHz 대역)과 저주파 대역(900MHz대역)이 사용된다.In this case, the frequency band used in the diplexer is a high frequency band (1700MHz band) and a low frequency band (900MHz band).

여기서, 상기 듀플렉서는 안테나에 연결돼 통화 때 필요한 신호만 통과시키고, 불필요한 신호와 잡음은 제거하는 역할을 하는 이동통신 단말기의 주요 부품을 말한다.In this case, the duplexer is connected to the antenna to pass only the signal required for the call, and refers to the main components of the mobile communication terminal that serves to remove unnecessary signals and noise.

이러한 다이플렉서는 대부분 칩으로 구성되며 안테나(Ant)를 통해 수신되는 주파수 신호에서 1700MHz 대역과 900MHz대역의 주파수를 분리해 주는 역할을 하며 그 특성을 살펴보면 대역통과 주파수의 삽입손실(Insertion Loss)은 최대 0.7dB(at-35 ~ +85), 0.6dB(at +25)로 설계되어져 왔다.Most of these diplexers are composed of chips and separate the frequencies of the 1700MHz and 900MHz bands from the frequency signals received through the antenna. The characteristics of the insertion loss of the bandpass frequency are It has been designed with a maximum of 0.7dB (at-35 to +85) and 0.6dB (at +25).

참고로, 상기 삽입손실(I.L)이란 전송계에 트랜스듀서를 삽입함으로써 발생되는 결과를 주는 것으로, 트랜스듀서 다음의 어느 장소에 주어지는 전력(P2)과 트랜스듀서를 제거했을 때 같은 장소에 주어지는 전력(P1)의비를 데시벨(dB)로 나타낸 것이다.For reference, the insertion loss IL gives a result generated by inserting the transducer into the transmission system, and the power P 2 given to a place after the transducer and the power given to the same place when the transducer is removed. The ratio of (P 1 ) is expressed in decibels (dB).

따라서, 종래의 하나의 칩으로 구현된 다이플렉서는 입력된 주파수가 내부의 선택 단자에 의해서 이중밴드로 나누어주는 과정에서 칩에서 성능을 구현하였기 때문에, 특히 고주파의 경우 주파수에 따른 손실이 상당히 큰 문제점이 있었다.Therefore, since the diplexer implemented with a single chip realizes performance in the chip in the process of dividing the input frequency into double bands by the internal selection terminal, the loss due to the frequency is particularly large in the case of high frequency. There was a problem.

따라서, 본 발명은 상기와 같은 종래의 문제점을 해결하기 위하여 창출한 것으로, 다이플렉서 회로를 이산적(Discrete)으로 구성하여 고주파에서의 삽입손실을 개선하고 밴드 선택도를 더욱 높일 수 있도록 하는 이중밴드 통신 단말기의 다이플렉서 회로를 제공함에 그 목적이 있다.Therefore, the present invention has been created to solve the above-mentioned conventional problems, and the diplexer circuit is discretely configured to improve insertion loss at high frequency and to further increase band selectivity. It is an object of the present invention to provide a diplexer circuit of a band communication terminal.

도 1은 본 발명에 의한 다이플렉서 회로의 구성을 보인 회로도.1 is a circuit diagram showing the configuration of a diplexer circuit according to the present invention.

** 도면의 주요 부분에 대한 부호의 설명 **** Description of symbols for the main parts of the drawing **

100 : 오픈 공진부 200 : 쇼트 공진부100: open resonator 200: short resonator

C1∼C5 : 커패시터 L1∼L3 : 인덕터C1 to C5: Capacitors L1 to L3: Inductors

이와 같은 목적을 달성하기 위한 본 발명은, 광대역 주파수 신호를 수신하여 저주파 대역 이외의 다른 주파수를 반사하도록 하는 커패시터(C1)와 인덕터(L1)로 이루어진 공진회로와 그 공진회로에 일측이 접지된 커패시터(C3)를 병렬 연결하여 저주파 대역을 분리하도록 이루어진 저주파 대역 패스(path)와; 상기 광대역 주파수 신호에서 고주파 대역 이외의 다른 주파수를 반사하도록 하는 커패시터(C2)와인덕터(L2)로 이루어진 쇼트 공진부(200)와; 그 쇼트 공진부(200)를 통해 출력된 주파수 대역에서 선택도를 향상시키는 오픈 공진부(100)가 접속되어 고주파 대역을 분리하도록 이루어진 고주파 대역 패스와, 광대역 주파수 밴드를 수신하는 안테나측에 션트 커패시터를 더 구비하여 구성한 것을 특징으로 한다.In order to achieve the above object, the present invention provides a resonant circuit comprising a capacitor C1 and an inductor L1 for receiving a wideband frequency signal and reflecting a frequency other than a low frequency band, and a capacitor having one side grounded to the resonant circuit. A low frequency band path configured to connect (C3) in parallel to separate low frequency bands; A short resonator 200 formed of a capacitor C2 and an inductor L2 for reflecting a frequency other than a high frequency band from the wideband frequency signal; An open resonator 100 for improving selectivity in the frequency band output through the short resonator 200 is connected to the high frequency band path configured to separate the high frequency band, and a shunt capacitor on the antenna side for receiving the wide frequency band. Characterized in that the configuration further provided.

이하, 본 발명에 따른 일실시예를 첨부한 도면을 참조하여 상세히 설명하면 다음과 같다.Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

도1은 본 발명에 의한 다이플렉서 회로의 구성을 보인 회로도로서, 이에 도시한 바와 같이, 단말기에서 안테나(Ant)는 송신시에 송신기의 전력 고주파 에너지를 전파 에너지로 바꾸어 공간에 방사하고, 수신시에는 공간의 전파 에너지를 수신하여 전력으로 바꾸어 수신기에 공급하는 에너지 변환장치(미도시)를 통해 안테나에 필요한 밴드를 수신 및 송신할 수 있다.1 is a circuit diagram showing a configuration of a diplexer circuit according to the present invention. As shown in FIG. 1, an antenna Ant in a terminal radiates power radio frequency energy of a transmitter into radio wave energy and transmits the radiation to a space during reception. In the city, a band required for an antenna may be received and transmitted through an energy converter (not shown) which receives radio wave energy of a space and converts it into electric power to supply the receiver.

이에 따라, 상기 안테나(Ant)를 통해서 수신되는 주파수 대역은 저주파 대역(900MHz 대역)과 고주파 대역(1700MHz 대역)으로 분리하게 된다.Accordingly, the frequency band received through the antenna is divided into a low frequency band (900 MHz band) and a high frequency band (1700 MHz band).

상기 고주파 대역 패스(path)는 크게 오픈(open) 공진부(100)와 쇼트(short) 공진부(200)로 이루어지며, 오픈 공진부(100)는 밴드 선택(band selection)을 하고 쇼트 공진부(200)는 밴드 리젝션(band rejection) 역할을 하게 된다.The high frequency band path is largely comprised of an open resonator 100 and a short resonator 200, and the open resonator 100 performs band selection and a short resonator. 200 serves as a band rejection.

오픈 공진은 최소한으로 손실을 줄여 원하는 주파수를 선택하는 역할을 하고, 그 구성 소자인 인덕터(L3)에 의해 고주파 대역의 손실을 더욱 최소화 시키게 되고, C4값에 의해 고주파 대역과 같이 고주파 대역에서의 삽입손실(Insertion Loss)을 보상해 주는 역할을 할 수 있다는 특징이 있다.The open resonance serves to select the desired frequency by reducing the loss to a minimum, and further minimizes the loss of the high frequency band by the inductor (L3) as its component, and inserts in the high frequency band like the high frequency band by the C4 value. It can play a role of compensating for loss (Insertion Loss).

즉, 서로 병렬 접속된 커패시터(C4)와 인덕터(L3)는 오픈 공진 형태를 이루어 고주파 대역에서 원하는 밴드를 선택할 수 있게 된다.That is, the capacitor C4 and the inductor L3 connected in parallel to each other form an open resonance shape, and thus, a desired band can be selected in the high frequency band.

다음, 쇼트 공진에서는 고주파 대역 이외의 다른 밴드를 리젝션 하는 구조로 이루어 진다Next, in the short resonance, a structure for rejecting a band other than the high frequency band is formed.

따라서, 상기와 같은 이산적 다이플렉서 회로는 동조회로(미도시)를 이용하여 보다 좋은 분리도(Isolation)와 적은 삽입손실(Insertion Loss)를 얻을 수 있도록하는 특징이 있다.Therefore, the discrete diplexer circuit as described above is characterized in that a better isolation and less insertion loss can be obtained by using a tuning circuit (not shown).

한편, 본 발명에서는 안테나 측에 션트 커패시터(Shunt Capacitor)(C5)를 삽입하여 고주파 대역에서의 삽입 손실을 더욱 줄여주게 된다.Meanwhile, in the present invention, the insertion loss in the high frequency band is further reduced by inserting a shunt capacitor C5 on the antenna side.

이때, 상기 션트 커패시터(C5)에 의해 고주파 대역의 삽입 손실이 최대 0.7dB(at +25)로 상당히 적은 손실로 고주파 대역쪽의 손실을 감소시키고, 저주파 대역쪽에는 전혀 영향이 없음을 알 수 있다.At this time, the insertion loss of the high frequency band by the shunt capacitor (C5) is 0.7dB (at +25) at a maximum, the loss of the high frequency band side is reduced significantly, it can be seen that there is no effect on the low frequency band side. .

이상에서 설명한 바와 같이 본 발명 이중밴드 통신 단말기의 다이플렉서 회로는 저주파 대역의 삽입손실에는 전혀 영향을 미치지 않고, 고주파 대역의 삽입손실을 더욱 개선시키는 효과가 있다.As described above, the diplexer circuit of the dual band communication terminal of the present invention does not affect the insertion loss of the low frequency band at all, and has an effect of further improving the insertion loss of the high frequency band.

Claims (3)

광대역 주파수 신호를 수신하여 저주파 대역 이외의 다른 주파수를 반사하도록 하는 커패시터(C1)와 인덕터(L1)로 이루어진 공진회로와 그 공진회로에 일측이 접지된 커패시터(C3)를 병렬 연결하여 저주파 대역을 분리하도록 이루어진 저주파 대역 패스(path)와; 상기 광대역 주파수 신호에서 고주파 대역 이외의 다른 주파수를 반사하도록 하는 커패시터(C2)와 인덕터(L2)로 이루어진 쇼트 공진부와; 그 쇼트 공진부를 통해 출력된 주파수 대역에서 선택도를 향상시키는 오픈 공진부가 접속되어 고주파 대역을 분리하도록 이루어진 고주파 대역 패스와, 광대역 주파수 밴드를 수신하는 안테나측에 션트 커패시터를 더 구비하여 구성한 것을 특징으로 하는 이중밴드 통신 단말기의 다이플렉서 회로.A low frequency band is separated by connecting a resonant circuit composed of a capacitor (C1) and an inductor (L1) to receive a wideband frequency signal and reflecting a frequency other than the low frequency band and a capacitor (C3) having one side grounded to the resonant circuit in parallel. A low frequency band path configured to; A short resonator comprising a capacitor (C2) and an inductor (L2) for reflecting a frequency other than a high frequency band in the wideband frequency signal; An open resonator for improving selectivity in the frequency band output through the short resonator is connected, and a high frequency band pass configured to separate the high frequency band and a shunt capacitor are further provided on the antenna side for receiving the wideband frequency band. A diplexer circuit of a dual band communication terminal. 제1항에 있어서, 상기 저주파 대역 패스에서 분리하는 주파수 대역은 900MHz 대역인 것을 특징으로 하는 이중밴드 통신 단말기의 다이플렉서 회로.2. The diplexer circuit of claim 1, wherein the frequency band separated in the low frequency band pass is a 900 MHz band. 제1항에 있어서, 상기 고주파 대역 패스에서 분리하는 주파수 대역은 1700MHz 대역인 것을 특징으로 하는 이중밴드 통신 단말기의 다이플렉서 회로.2. The diplexer circuit of claim 1, wherein the frequency band separated in the high frequency band pass is a 1700 MHz band.
KR1020010031750A 2001-06-07 2001-06-07 Diplexer circuit for dual band communication device KR20020093281A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150119002A (en) * 2013-02-07 2015-10-23 우한 핀구 일렉트로닉 테크놀로지 컴퍼니 리미티드 Intermodulation cancellation apparatus for passive component

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5821831A (en) * 1996-05-10 1998-10-13 Eagle Comtronics, Inc. Diplex filter comprising monotonic poles
EP0893881A2 (en) * 1997-07-22 1999-01-27 Caradon Friedland Limited Diplexer for full duplex communications
JPH11251957A (en) * 1998-02-27 1999-09-17 Murata Mfg Co Ltd Transmission/reception circuit for dual band radio communication equipment
JP2001102957A (en) * 1999-09-28 2001-04-13 Murata Mfg Co Ltd Composite high-frequency component and mobile communication device using same
KR20020018233A (en) * 2000-09-01 2002-03-08 이형도 One chip diplexer of dual phone and method for producting one chip diplexer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5821831A (en) * 1996-05-10 1998-10-13 Eagle Comtronics, Inc. Diplex filter comprising monotonic poles
EP0893881A2 (en) * 1997-07-22 1999-01-27 Caradon Friedland Limited Diplexer for full duplex communications
JPH11251957A (en) * 1998-02-27 1999-09-17 Murata Mfg Co Ltd Transmission/reception circuit for dual band radio communication equipment
JP2001102957A (en) * 1999-09-28 2001-04-13 Murata Mfg Co Ltd Composite high-frequency component and mobile communication device using same
KR20020018233A (en) * 2000-09-01 2002-03-08 이형도 One chip diplexer of dual phone and method for producting one chip diplexer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150119002A (en) * 2013-02-07 2015-10-23 우한 핀구 일렉트로닉 테크놀로지 컴퍼니 리미티드 Intermodulation cancellation apparatus for passive component

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