KR20030026086A - Detection apparatus for transmittion power of portable telephone - Google Patents

Detection apparatus for transmittion power of portable telephone Download PDF

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Publication number
KR20030026086A
KR20030026086A KR1020010059084A KR20010059084A KR20030026086A KR 20030026086 A KR20030026086 A KR 20030026086A KR 1020010059084 A KR1020010059084 A KR 1020010059084A KR 20010059084 A KR20010059084 A KR 20010059084A KR 20030026086 A KR20030026086 A KR 20030026086A
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South Korea
Prior art keywords
transmission power
dual band
duplexer
signal
filter unit
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KR1020010059084A
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Korean (ko)
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이요원
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엘지전자 주식회사
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Priority to KR1020010059084A priority Critical patent/KR20030026086A/en
Publication of KR20030026086A publication Critical patent/KR20030026086A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/10—Monitoring; Testing of transmitters
    • H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
    • H04B17/102—Power radiated at antenna

Abstract

PURPOSE: An apparatus for detecting a transmission power of a mobile phone is provided to accurately detect a transmission power level for compensating a frequency-classified transmission power level in a dual band/tri-mode mobile portable terminal. CONSTITUTION: A dual band filter unit(3) filters a dual band signal for transmitting a signal of a base station received through a shared antenna(ANT) to a cellular duplexer(1) or a PCS(Personal Communication Service) duplexer, or transmitting a signal inputted through the cellular duplexer(1) or the PCS duplexer to the base station. A transmission power detecting unit(4) detects a transmission power from an intermediate node of the antenna(ANT) and the dual band filter unit(3).

Description

휴대폰의 송신전력 검출장치{DETECTION APPARATUS FOR TRANSMITTION POWER OF PORTABLE TELEPHONE}DETECTION APPARATUS FOR TRANSMITTION POWER OF PORTABLE TELEPHONE}

본 발명은 셀룰라 또는 피씨에스(PCS) 등의 이동 휴대 단말기에서 송신 파워를 검출하는 기술에 관한 것으로, 특히 이중대역/삼중모드(Dual Band/Tri-Mode) 이동 휴대 단말기에서 주파수별 송신 파워 레벨을 보상하기 위하여 송신 파워 레벨을 정확하게 검출할 수 있도록 한 휴대폰의 송신전력 검출장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for detecting transmission power in a mobile portable terminal such as cellular or PCS. In particular, the present invention relates to a transmission power level for each frequency in a dual band / tri-mode mobile portable terminal. The present invention relates to a transmission power detection device of a mobile phone capable of accurately detecting a transmission power level for compensation.

일반적으로, 휴대폰에서 주파수(채널)별 송신 전력을 일정하게 유지시켜 줄 필요가 있는데, 이를 위해 기지국측으로 전송되는 전력을 검출하여 적절히 보상하게 된다.In general, it is necessary to maintain a constant transmission power for each frequency (channel) in a mobile phone. For this purpose, power transmitted to a base station is detected and properly compensated.

종래의 단일대역/이중모드(Single Band/Dual Mode) 휴대폰에서는 파워앰프의 종단이나 듀플렉서 안테나측에 파워 검출회로를 설치하고, 이를 통해 송신 전력을 검출하여 주파수별 송신 파워 레벨을 보상해 주었다.In the conventional single band / dual mode mobile phone, a power detection circuit is installed at the end of the power amplifier or the duplexer antenna, and the transmission power is detected to compensate for the transmission power level for each frequency.

또한, 종래의 이중대역/삼중모드(Dual Band/Tri-Mode) 휴대폰에서도 파워앰프의 종단이나 듀플렉서 안테나측에 파워 검출회로를 설치하고, 이를 통해 송신 전력을 검출하게 되어 있었다. 그러나, 이와 같은 경우 두 개의 파워 검출회로와 두 개의 커플러 소자가 필요하며, 마지막 종단에서 이중대역을 필터링하는 필터부의 손실이 전혀 반영되지 않아 송신 전력을 정확하게 검출할 수 없었다.In addition, in a conventional dual band / tri-mode mobile phone, a power detection circuit is provided at the end of the power amplifier or the duplexer antenna, and thus the transmission power is detected. However, in this case, two power detection circuits and two coupler elements are required, and the transmission power cannot be accurately detected because the loss of the filter portion filtering the dual band is not reflected at all.

이와 같이 종래의 휴대폰에 있어서는 두 개의 파워 검출회로와 두 개의 커플러 소자를 사용하여 송신전력을 검출하게 되어 있으나, 마지막 종단에서 이중대역을 필터링하는 필터부의 손실이 전혀 반영되지 않아 송신 전력을 정확하게 검출할 수 없고, 이로 인하여 송신 전력을 정확하게 보상하는 것이 불가능하여 송신전력을 일정하게 유지할 수 없는 문제점이 있었다.As described above, in the conventional mobile phone, the transmission power is detected by using two power detection circuits and two coupler elements. However, since the loss of the filter unit filtering the dual band is not reflected at all, the transmission power can be accurately detected. There is a problem in that it is impossible to accurately compensate the transmission power and thus the transmission power cannot be kept constant.

따라서, 본 발명의 목적은 이중대역/삼중모드(Dual Band/Tri-Mode) 이동 휴대 단말기에서 주파수별 송신 파워 레벨을 정확하게 보상하여 일정 레벨을 유지할 수 있도록 파워 레벨을 정확하게 검출해 내는 휴대폰의 송신전력 검출장치를 제공함에 있다.Accordingly, an object of the present invention is to provide a transmission power of a mobile phone which accurately detects a power level to accurately maintain a constant level by accurately compensating a transmission power level for each frequency in a dual band / tri-mode mobile terminal. The present invention provides a detection apparatus.

도 1은 본 발명에 의한 휴대폰의 송신전력 검출장치의 블록도.1 is a block diagram of a transmission power detection device of a mobile phone according to the present invention.

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

1 : 셀룰라 듀플렉서1A,2A : 저잡음증폭기1: Cellular Duplexer 1A, 2A: Low Noise Amplifier

1B,2B : 파워앰프2 : PCS 듀플렉서1B, 2B: Power Amplifier 2: PCS Duplexer

3 : 이중대역 필터부4 : 송신전력 검출부3: dual band filter unit 4: transmission power detection unit

도 1은 본 발명에 의한 휴대폰의 송신전력 검출장치의 일실시 예를 보인 블록도로서 이에 도시한 바와 같이, 이중대역 필터부(3)를 통해 입력되는 신호를 저잡음증폭기(1A)측으로 전달하고, 파워앰프(1B)를 통해 입력되는 신호를 그 이중대역 필터부(3)측으로 전달하기 위해 여파 기능을 수행하는 셀룰라 듀플렉서(1)와; 상기 이중대역 필터부(3)를 통해 입력되는 신호를 저잡음증폭기(2A)측으로 전달하고, 파워앰프(2B)를 통해 입력되는 신호를 그 이중대역 필터부(3)측으로 전달하기 위해 여파 기능을 수행하는 PCS 듀플렉서(2)와; 하나의 안테나(ANT)를 공용하여 그를 통해 수신되는 기지국의 신호를 상기 셀룰라 듀플렉서(1) 또는 PCS 듀플렉서(2)측으로 전달하거나, 그 듀플렉서(1),(2)를 통해 입력되는 신호를 기지국측으로 전송하기 위하여 이중 대역의 신호를 필터링하는 이중대역 필터부(3)와; 상기 안테나(ANT)와 이중대역 필터부(3)의 중간 노드로부터 송신 전력을 검출하는 송신전력 검출부(4)로 구성한 것으로, 이와 같이 구성한 본 발명의 작용을 상세히 설명하면 다음과 같다.1 is a block diagram showing an embodiment of a transmission power detecting apparatus of a mobile phone according to the present invention, as shown in FIG. 1, to transfer a signal input through the dual band filter unit 3 to the low noise amplifier 1A, A cellular duplexer (1) which performs a filtering function to transmit a signal input through the power amplifier (1B) to the dual band filter section 3; Performs a filter function to transfer the signal input through the dual band filter section 3 to the low noise amplifier 2A side and the signal input through the power amplifier 2B to the dual band filter section 3 side. A PCS duplexer 2; One antenna ANT is shared and transmits the signal of the base station received through the cellular duplexer 1 or the PCS duplexer 2, or the signal input through the duplexer 1, 2 to the base station side. A dual band filter section (3) for filtering the dual band signal for transmission; The transmission power detector 4 detects the transmission power from an intermediate node of the antenna ANT and the dual band filter unit 3. The operation of the present invention configured as described above will be described in detail as follows.

기지국에서 송출된 신호를 단말기에서 수신처리할 때, 그 송출된 고주파 신호가 안테나(ANT)를 통해 이중대역 필터부(3)에 전달되고, 그 이중대역 필터부(3)는 입력되는 신호를 필터링하여 셀룰라 듀플렉서(1) 또는 PCS 듀플렉서(2)측으로 전달한다.When the terminal receives the signal transmitted from the base station, the transmitted high frequency signal is transmitted to the dual band filter unit 3 through the antenna ANT, and the dual band filter unit 3 filters the input signal. To the cellular duplexer 1 or the PCS duplexer 2.

따라서, 상기 이중대역 필터부(3)에서 출력되는 고주파 신호가 셀룰라 듀플렉서(1)를 통해 저잡음증폭기(1A)에 전달되어 증폭되거나, PCS 듀플렉서(2)를 통해 저잡음증폭기(2A)에 전달되어 증폭된다.Therefore, the high frequency signal output from the dual band filter unit 3 is transferred to the low noise amplifier 1A through the cellular duplexer 1 and amplified, or transmitted to the low noise amplifier 2A through the PCS duplexer 2 and amplified. do.

이와 반대로, 단말기에서 기지국측으로 신호를 전송할 때, 파워앰프(1B)를 통해 전력증폭된 고주파신호가 상기 셀룰라 듀플렉서(1)를 통해 상기 이중대역 필터부(3)에 전달되거나, 파워앰프(2B)를 통해 전력증폭된 고주파신호가 상기 PCS 듀플렉서(2)를 통해 상기 이중대역 필터부(3)에 전달된다.On the contrary, when a signal is transmitted from the terminal to the base station side, a high frequency signal amplified by the power amplifier 1B is transmitted to the dual band filter unit 3 through the cellular duplexer 1 or the power amplifier 2B. The high-frequency signal amplified by the power is transmitted to the dual band filter unit 3 through the PCS duplexer (2).

이때, 상기 이중대역 필터부(3)는 상기 셀룰라 듀플렉서(1) 또는 PCS 듀플렉서(2)로부터 입력되는 고주파신호를 선택하여 안테나(ANT)를 통해 기지국측으로 전송한다.In this case, the dual band filter unit 3 selects a high frequency signal input from the cellular duplexer 1 or the PCS duplexer 2 and transmits the high frequency signal to the base station through the antenna ANT.

결국, 단말기측에서 상기 이중대역 필터부(3)가 상기 셀룰라 듀플렉서(1) 또는 PCS 듀플렉서(2)와 연계하여 기지국간 데이터를 송수신하게 된다.As a result, at the terminal side, the dual band filter unit 3 transmits and receives data between base stations in association with the cellular duplexer 1 or the PCS duplexer 2.

그런데, 송신전력 검출부(4)가 상기 안테나(ANT)와 이중대역 필터부(3)의 중간 노드로부터 송신 전력을 검출하고, 그 검출신호가 마이크프로세서(도면에 미표시)에 전달된다. 이에 따라, 그 마이크로프로세서는 단말기의 현재 송신 전력을 인식한 후 필요시 주파수(채널)별 송신 전력을 보상하게 되므로 송신 전력을 항상 일정한 레벨로 유지할 수 있게 된다.By the way, the transmission power detection unit 4 detects transmission power from the intermediate node of the antenna ANT and the dual band filter unit 3, and the detection signal is transmitted to the microphone processor (not shown). Accordingly, since the microprocessor recognizes the current transmission power of the terminal and compensates the transmission power for each frequency (channel) when necessary, the microprocessor can maintain the transmission power at a constant level at all times.

여기서, 간과할 수 없는 사항은 상기 안테나(ANT)와 이중대역 필터부(3)의 중간 노드로부터 송신 전력을 검출하게 되므로 송신전력 검출에 의한 삽입 손실이 발생되지 않는다는 것이다.In this case, it cannot be overlooked that the transmission power is detected from the intermediate node of the antenna ANT and the dual band filter unit 3, so that insertion loss due to the detection of the transmission power does not occur.

이상에서 상세히 설명한 바와 같이 본 발명은 이중대역/삼중모드(Dual Band/Tri-Mode) 이동 휴대 단말기에서 송신전력을 검출할 때, 안테나와 이중대역 필터부의 중간 노드로부터 검출하여 송신전력 검출에 의한 삽입 손실을 유발시키지 않고 송신전력을 정확하게 검출할 수 있게 되고, 이로 인하여 주파수별 송신 파워 레벨을 정확하게 보상하여 일정 레벨을 유지할 수 있는 효과가 있다.As described in detail above, in the present invention, when detecting a transmission power in a dual band / tri-mode mobile portable terminal, the antenna is detected from an intermediate node of the antenna and the dual band filter unit. It is possible to accurately detect the transmission power without causing a loss, and thus there is an effect of maintaining a constant level by accurately compensating the transmission power level for each frequency.

Claims (2)

하나의 안테나를 공용하여 그를 통해 수신되는 기지국의 신호를 상기 셀룰라 듀플렉서 또는 PCS 듀플렉서측으로 전달하거나, 반대 경로로 신호를 전송하기 위하여 이중 대역의 신호를 필터링하는 이중대역 필터부와; 상기 안테나와 이중대역 필터부의 중간 노드로부터 송신 전력을 검출하는 송신전력 검출부를 포함하여 구성한 것을 특징으로 하는 휴대폰의 송신전력 검출장치.A dual band filter unit for sharing a single antenna and transmitting a signal of a base station received through the antenna to the cellular duplexer or a PCS duplexer or filtering a dual band signal to transmit a signal in an opposite path; And a transmission power detection unit for detecting transmission power from an intermediate node of the antenna and the dual band filter unit. 제1항에 있어서, 상기 송신전력 검출부의 검출 결과를 근거로 단말기의 현재 송신 전력을 인식하여 필요시 주파수(채널)별 송신 전력을 보상하는 마이크로프로세서를 더 포함하여 구성한 것을 특징으로 하는 휴대폰의 송신전력 검출장치.The mobile phone of claim 1, further comprising a microprocessor that recognizes a current transmission power of the terminal based on a detection result of the transmission power detection unit and compensates transmission power for each frequency (channel) when necessary. Power detection device.
KR1020010059084A 2001-09-24 2001-09-24 Detection apparatus for transmittion power of portable telephone KR20030026086A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100795537B1 (en) * 2005-11-16 2008-01-21 엘지전자 주식회사 Mobile communication terminal and its operating method
CN103209003A (en) * 2012-01-17 2013-07-17 国民技术股份有限公司 Antenna sharing circuit, radio frequency circuit and mobile terminal

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US5884149A (en) * 1997-02-13 1999-03-16 Nokia Mobile Phones Limited Mobile station having dual band RF detector and gain control
US6108527A (en) * 1997-07-31 2000-08-22 Lucent Technologies, Inc. Wide range multiple band RF power detector
US6216012B1 (en) * 1997-11-07 2001-04-10 Conexant Systems, Inc. Dualband power amplifier control using a single power amplifier controller
JP2001127664A (en) * 1999-09-15 2001-05-11 Motorola Inc Wireless frequency coupler suitable for use in multi- band wireless communication unit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5884149A (en) * 1997-02-13 1999-03-16 Nokia Mobile Phones Limited Mobile station having dual band RF detector and gain control
US6108527A (en) * 1997-07-31 2000-08-22 Lucent Technologies, Inc. Wide range multiple band RF power detector
US6216012B1 (en) * 1997-11-07 2001-04-10 Conexant Systems, Inc. Dualband power amplifier control using a single power amplifier controller
JP2001127664A (en) * 1999-09-15 2001-05-11 Motorola Inc Wireless frequency coupler suitable for use in multi- band wireless communication unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100795537B1 (en) * 2005-11-16 2008-01-21 엘지전자 주식회사 Mobile communication terminal and its operating method
CN103209003A (en) * 2012-01-17 2013-07-17 国民技术股份有限公司 Antenna sharing circuit, radio frequency circuit and mobile terminal

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