CN104639202A - The wireless communication device - Google Patents

The wireless communication device Download PDF

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CN104639202A
CN104639202A CN201310568260.4A CN201310568260A CN104639202A CN 104639202 A CN104639202 A CN 104639202A CN 201310568260 A CN201310568260 A CN 201310568260A CN 104639202 A CN104639202 A CN 104639202A
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voltage
wireless communication
communication apparatus
circuit
control signal
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CN201310568260.4A
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董行
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深圳富泰宏精密工业有限公司
群迈通讯股份有限公司
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Priority to CN201310568260.4A priority Critical patent/CN104639202A/en
Publication of CN104639202A publication Critical patent/CN104639202A/en

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Abstract

The invention provides a wireless communication device. The wireless communication device comprises an antenna, a transceiver, a comparing circuit, a matching circuit and a variode, wherein the matching circuit is electrically connected with the antenna, the transceiver is used for outputting corresponding voltage signals according to current received signal strength, the comparing circuit is provided with a threshold voltage and outputs a control signal by comparing the voltage signals with the threshold voltage, and the control signal controls capacitance of the variode so as to enable the variode and the matching circuit to jointly provide impedance matching of the antenna.

Description

无线通信装置 The wireless communication device

技术领域 FIELD

[0001] 本发明涉及一种无线通信装置,尤其是及一种能提高低频段信号收发质量的无线通信装置。 [0001] The present invention relates to a wireless communications apparatus, and particularly one that enhances the low frequency signal transmission and reception quality of the wireless communication device.

背景技术 Background technique

[0002] 当前,无线通信装置的天线设计难点在于低频段带宽,例如对于低频段的GSM900 系统而言,通常很难覆盖880-960MHZ的带宽。 [0002] Currently, the wireless communication apparatus antenna design difficulty is that the bandwidth of the low frequency, low frequency, for example, for a GSM900 system, it is often difficult to cover the bandwidth of 880-960MHZ. 并且,当无线通信装置处于弱场时,例如在地下室或者当使用者握持无线通信装置时,其接收信号强度(Received Signal Strength Indication, RSSI)的值会降低,无线通信装置容易出现弱场掉话等现象,严重影响通话质量。 Then, when the wireless communication device is in a weak field, for example, holding a wireless communication apparatus that receives a signal intensity (Received Signal Strength Indication, RSSI) value decreases in the basement or when the user, the wireless communication apparatus readily occur out a weak field words and so on, seriously affecting call quality.

发明内容 SUMMARY

[0003] 鉴于W上内容,有必要提供一种能提高低频段信号收发质量的无线通信装置。 [0003] In view of the contents of W, it is necessary to provide a wireless communication apparatus can improve the quality of the low-band signal transceiver.

[0004] 一种无线通信装置,其包括天线、收发器、比较电路、匹配电路及变容二极管,该匹配电路与天线电性连接,该收发器用于根据当前的接收信号强度输出相应的电压信号,该比较电路具有一口限电压,该比较电路通过比较电压信号和口限电压的大小输出一控制信号,该控制信号控制变容二极管的电容值,W使得变容二极管与匹配电路共同为天线提供阻抗匹配。 [0004] A wireless communications apparatus, which includes an antenna, a transceiver, a comparison circuit, a matching circuit and the varactor diode, which matching circuit is electrically connected to the antenna, the transceiver for the corresponding received signal strength based on the current output voltage signal the comparator circuit having a threshold voltage, the comparator circuit outputs a control signal by comparing the voltage signal and the magnitude opening threshold voltage, the control signal is the capacitance value of the control variable capacitance diode, W so that the varactor matching circuit together for the antenna provides impedance matching.

[0005] 上述的无线通信装置的收发器根据根据当前的接收信号强度输出对应的电压信号,该比较电路具有口限电压,使得比较电路输出高电平控制信号或低电平控制信号,并将高电平控制信号经过电压转换电路达到变容二极管所需的电压,该变容二极管可W有效地优化匹配电路,从而调整天线的阻抗匹配,因此,即使在弱场环境时,天线的性能也会提升, 从而提高无线通信装置在低频段的信号收发质量。 Transceiver [0005] The radio communication apparatus according to the current received signal strength corresponding to the output voltage signal, the comparator circuit having a threshold voltage port, so that the control signal of the comparator circuit outputs a high level or low level control signal, and high-level control signal through the voltage conversion circuit reaches a desired voltage varactor diodes, which varactor W can effectively optimize the matching circuit, thereby adjusting the impedance matching of the antenna, and therefore, even in a weak field environment, the performance of the antenna is also It will increase, thereby improving the quality of the low frequency band signal transceiving wireless communication device.

附图说明 BRIEF DESCRIPTION

[0006] 图1是本发明较佳实施例的无线通信装置的功能模块图。 [0006] FIG. 1 is a functional block diagram of a radio communication apparatus of the preferred embodiment of the present invention.

[0007] 主要元件符号说明 [0007] Main reference numerals DESCRIPTION

Figure CN104639202AD00041

如下具体实施方式将结合上述附图进一步说明本发明。 The following detailed description in conjunction with the accompanying drawings, the present invention is described.

具体实施方式 Detailed ways

[0008] 请参阅图1,本发明的较佳实施例提供一种无线通信装置100,其可为手机、 个人数字助理(PDA)、平板电脑等。 [0008] Referring to FIG. 1, for example, a wireless communication apparatus 100, which may be a mobile phone, a personal digital assistant (PDA), a tablet computer preferred embodiment of the present invention. 该无线通信装置100可工作于不同的系统,例如GSM850/900/1800/1900 和WCDMA900/2100 等。 The wireless communication device 100 may operate in different systems, e.g. GSM850 / 900/1800/1900 and WCDMA900 / 2100 and the like.

[0009] 该无线通信装置100包括收发器10、功率放大器20、射频前端开关30、比较电路40、电压转换电路50、匹配电路60、天线70及变容二极管VD。 [0009] The wireless communication device 100 includes a transceiver 10, a power amplifier 20, RF front-end switch 30, comparator circuit 40, voltage conversion circuit 50, a matching circuit 60, antenna 70 and the varactor diode VD.

[0010] 该收发器10用于发射射频信号。 [0010] The transceiver 10 for transmitting radio frequency signals. 此外,该收发器10还用于根据无线通信装置100 当前的收发器接收信号强度RSSI输出对应的电压信号化amp。 In addition, the transceiver 10 is also a voltage signal of the wireless communication apparatus according amp transceiver 100 is currently received signal strength corresponding to the RSSI output. 在本实施例中,该电压信号化amp的电压与接收信号强度RSSI的值成反比。 In the present embodiment, the voltage signal is inversely proportional to the voltage of the amp is the received signal strength RSSI. 也就是说,该接收信号强度RSSI的值越低,该电压信号化amp的电压越高。 That is, the value of the received signal strength RSSI is lower, the higher the voltage of the signal voltage of the amp. 通常,当无线通信装置100放置于桌面时,其接收信号强度RSSI的值较高;当无线通信装置100被用户的手握持时,其接收信号强度RSSI的值较低。 Typically, when the wireless communication apparatus 100 is placed on the desktop, which is the received signal strength RSSI value is high; and when the wireless communication apparatus 100 is held by the user's hand, the lower value of its received signal strength RSSI.

[0011] 该功率放大器20与收发器10电性连接,用于接收并放大收发器10发射的射频信号。 [0011] The power amplifier 20 is electrically connected to a transceiver 10, a transceiver for receiving and amplifying the transmitted RF signal 10.

[0012] 该射频前端开关30与功率放大器20电性连接,同时通过一滤波电容C与匹配电路60电性连接。 [0012] The RF front-end switch 30 is electrically connected to the amplifier 20, while capacitor C through a filter with a matching circuit 60 is electrically connected. 该射频前端开关30用于将功率放大器20放大后的射频信号传送至匹配电路60。 The RF front-end switch 30 for transmitting the radio frequency signal to the power amplifier 20 amplifies the matching circuit 60.

[0013] 该比较电路40电性连接于收发器10和电压转换电路50之间,该比较电路40具有一口限电压vth,当电压信号化amp大于口限电压Vth,该比较电路40输出高电平控制信号;当电压信号化amp小于或等于口限电压Vth,该比较电路40输出低电平控制信号。 [0013] The comparator circuit 40 is electrically connected between the transceiver 10 and the voltage conversion circuit 50, the comparator circuit 40 has a threshold voltage Vth, when a high voltage signal is greater than the opening of the threshold voltage Vth of amp, the output of the comparator circuit 40 level control signal; signal when the voltage of the amp port less than or equal threshold voltage Vth, 40 low-level output of the comparator circuit a control signal. 当比较电路40输出高电平控制信号时,该高电平控制信号经过电压转换电路50的放大作用达到变容二极管VD所需的电压,使该变容二极管VD具有相应的电容值。 When the comparator circuit 40 outputs a high level control signal, the high level control signal after amplification voltage conversion circuit 50 reaches the voltage required varactor diode VD, such that the varactor diode VD has a corresponding capacitance value. 当比较电路40输出低电平控制信号时,该低电平控制信号经过电压转换电路50的放大后不足W达到变容二极管VD所需的电压,从而无法改变该变容二极管VD的电容值。 When the comparator circuit 40 outputs a low level control signal, the low-level control signal after amplification voltage conversion circuit 50 is less than W reaches a voltage required for varactor diode VD, and thus can not change the capacitance value of the varactor diode VD.

[0014] 该匹配电路60与天线70电性连接,用于调整天线70的阻抗匹配,从而调整天线70的性能。 [0014] The matching circuit 60 is electrically connected to the antenna 70, an antenna 70 for impedance matching adjustment so as to adjust the performance of the antenna 70.

Figure CN104639202AD00042

[0015] 该变容二极管VD用于与匹配电路60共同为天线70提供阻抗匹配,在本实施方式中,该变容二极管VD用于优化天线70在一特定频段,如低频段的GSM900系统上的匹配。 [0015] The varactor diode VD matching circuit 60 for impedance matching for the antenna 70 collectively provide, in the present embodiment, the varactor diode VD for optimizing antenna 70 in a specific frequency band, such as low-band GSM900 system match. 该变容二极管VD正极与匹配电路60共同接地,负极电性连接至电压转换电路50与匹配电路60之间的节点,通过改变输入至变容二极管VD电压,可使变容二极管VD具有相应的电容值。 The varactor diode VD positive electrode and common ground the matching circuit 60, the negative electrode 50 is electrically connected to the node voltage conversion circuit between the matching circuit 60 and by changing the input voltage to the varactor diode VD, varactor diode VD can have a corresponding capacitance value. 如此,即可实现对匹配电路60的优化,从而进一步优化天线70的性能。 Thus, to optimize the matching circuit 60, to further optimize the performance of antenna 70.

[0016] 下面分两种情况说明该无线通信装置100的使用方法。 [0016] The following two cases illustrate the use of the wireless communication device 100.

[0017] 第一,当无线通信装置100处于强场环境时,其接收信号强度RSSI的值较高,此时该收发器10输出电压信号化amp。 [0017] First, when the wireless communication apparatus 100 is in the strong field environment, the higher the value of its received signal strength RSSI, at which time the transceiver 10 outputs a voltage signal of amp. 由于该接收信号强度RSSI的值较高,故此时电压信号化amp的电压较低。 Due to the high value of the received signal strength RSSI, so the voltage signal is low at this time of the amp. 该电压信号化amp小于或等于比较电路40的口限电压Vth,从而使得比较电路40输出低电平的控制信号。 The voltage signal is less than or equal amp comparator of the interface circuit 40 limits voltage Vth, the comparator circuit 40 so that the control signal outputs a low level. 此时,该低电平控制信号经过电压转换电路50的变压后不足W达到变容二极管VD所需的电压,该变容二极管VD未对匹配电路60进行优化。 At this time, the low-level control signal after transforming voltage conversion circuit 50 is less than W reaches a voltage required for varactor diode VD, the varactor diode VD is not optimized for the matching circuit 60.

[0018] 另一方面,该收发器10发射射频信号,该射频信号经过功率放大器20放大后进入射频前端开关30,并最终通过匹配电路60被天线70发射出去。 [0018] On the other hand, 10 of the transceiver transmitting radio frequency signals, the radio frequency signal after entering the power amplifier 20 amplifies the RF front end switch 30, an antenna 70 and is finally emitted through the matching circuit 60.

[0019] 第二,当无线通信装置100处于弱场环境,其接收信号强度RSSI的值较低,此时该收发器10输出电压信号化amp。 [0019] Second, when the wireless communication apparatus 100 is in a weak field environment, the lower value of its received signal strength RSSI, at which time the transceiver 10 outputs a voltage signal of amp. 由于该接收信号强度RSSI的值较低,故此时电压信号化amp的电压较高。 Due to the low value of the received signal strength RSSI, so at this time a high voltage signal of the amp. 该电压信号化amp的电压值大于比较电路40的口限电压Vth,比较电路40输出高电平控制信号。 The voltage value of the voltage signal of the comparator circuit is greater than the amp port 40 threshold voltage Vth, 40 high-level control signal output of the comparator circuit. 此时,该高电平控制信号经过电压转换电路50的变压作用达到变容二极管VD所需的电压,使该变容二极管VD具有相应的电容值,从而该变容二极管VD 对匹配电路60进行优化。 In this case, the high level control signal via transformer action a voltage conversion circuit 50 reaches the voltage required varactor diode VD, such that the varactor diode VD has a corresponding capacitance value, such that the varactor diode VD matching circuit 60 optimize.

[0020] 另一方面,该收发器10发射射频信号,该射频信号经过功率放大器20放大后进入射频前端开关30,并最终通过匹配电路60被天线70发射出去。 [0020] On the other hand, 10 of the transceiver transmitting radio frequency signals, the radio frequency signal after entering the power amplifier 20 amplifies the RF front end switch 30, an antenna 70 and is finally emitted through the matching circuit 60. 由于此时变容二极管VD对匹配电路60进行优化,因此天线70的阻抗匹配得到适当调整,改善了天线70在弱场环境下的天线效率。 At this time, since the varactor diode VD to optimize the matching circuit 60, impedance matching of the antenna 70 is thus adjusted appropriately, to improve antenna efficiency of the antenna 70 in a weak field environment.

[0021] 可W理解,该变容二极管VD可串联在电压转换电路50与匹配电路60之间。 [0021] W can be appreciated that the varactor diode VD may be connected in series between a voltage conversion circuit 50 and the matching circuit 60.

[0022] 本发明的无线通信装置100的收发器10根据当前的接收信号强度RSSI输出对应的电压信号化amp,该比较电路40具有口限电压Vth,使得比较电路40输出高电平控制信号或低电平控制信号,高电平控制信号经过电压转换电路50达到变容二极管VD所需的电压,该变容二极管VD可W有效地优化匹配电路60,从而调整天线70的阻抗匹配,因此,即使在弱场环境时,天线70的性能也会提升,从而提高无线通信装置100在低频段的信号收发质量。 Transceiver [0022] The wireless communication apparatus according to the present invention 100 10 amp current voltage signal of a received signal strength RSSI output corresponding to the threshold comparison circuit 40 having a port voltage Vth, the comparator circuit 40 outputs a high level so that the control signal or control signal is low level, high-level control signal voltage required varactor diode VD through the voltage conversion circuit 50 reaches the varactor diode VD W can effectively optimize the matching circuit 60, thereby adjusting the impedance matching of the antenna 70, therefore, even in a weak field environment, will enhance the performance of antenna 70, thereby improving the signal quality of the wireless communication device transceiver 100 in a low frequency band.

Claims (9)

1. 一种无线通信装置,其包括天线,其特征在于:该无线通信装置还包括收发器、比较电路、匹配电路及变容二极管,该匹配电路与天线电性连接,该收发器用于根据当前的接收信号强度输出相应的电压信号,该比较电路具有一口限电压,该比较电路通过比较电压信号和口限电压的大小输出一控制信号,该控制信号控制变容二极管的电容值,W使得变容二极管与匹配电路共同为天线提供阻抗匹配。 A radio communication apparatus comprising an antenna, wherein: the wireless communication apparatus further includes a transceiver, a comparison circuit, a matching circuit and the varactor diode, which matching circuit is electrically connected to the antenna, the transceiver according to the current the received signal strength of a corresponding output voltage signal, the comparator circuit having a threshold voltage, the comparator circuit outputs a control signal by comparing the voltage signal and the magnitude opening threshold voltage, the control signal is the capacitance value of the control variable capacitance diode, W that becomes capacitance diode matching circuit together provide an impedance match for the antenna.
2. 如权利要求1所述的无线通信装置,其特征在于:所述无线通信装置还包括电压转换电路,该电压转换电路电性连接于比较电路与变容二极管之间,用于放大控制信号进而控制变容二极管。 The radio communication apparatus according to claim 1, wherein: said wireless communication apparatus further includes a voltage conversion circuit, the voltage conversion circuit is electrically connected between the comparator circuit and the varactor diode for amplifying the control signal Further varactor control.
3. 如权利要求2所述的无线通信装置,其特征在于:当控制信号为高电平时,该电压转换电路放大该控制信号W达到变容二极管所需电压,W改变变容二极管的电容值。 3. The wireless communication apparatus according to claim 2, wherein: when the control signal is high, the voltage conversion circuit amplifies the control signals W desired voltage varactors, W change the capacitance value of the varactor .
4. 如权利要求3所述的无线通信装置,其特征在于:当控制信号为低电平时,该低电平的控制信号经电压转换电路放大后无法达到变容二极管所需电压。 The radio communication apparatus according to claim 3, wherein: when the control signal is low, the low-level control signal is amplified by the voltage conversion circuit can not reach the required voltage varactors.
5. 如权利要求1所述的无线通信装置,其特征在于:所述电压信号大于口限电压时,该比较电路输出高电平控制信号,电压信号小于等于口限电压时,该比较电路输出低电平控制信号。 5. The wireless communication apparatus according to claim 1, wherein: the voltage signal is greater than the opening threshold voltage, the comparator circuit outputs a high level control signal, the voltage signal is less than equal to the threshold voltage port, the output of the comparator circuit low-level control signal.
6. 如权利要求1所述的无线通信装置,其特征在于:所述无线通信装置还包括功率放大器,所述功率放大器电性连接于收发器与射频前端开关之间,所述收发器用于发射射频信号,所述功率放大器接收并放大收发器发射的射频信号,并将放大后的射频信号传送至射频前端开关。 6. The wireless communication apparatus according to claim 1, wherein: said wireless communication apparatus further comprises a power amplifier electrically connected between the transceiver and the RF front-end switch, a transceiver for transmitting RF signals, the power amplifier receiving and amplifying the transceiver to transmit RF signals, and transmits the amplified RF signals to RF front-end switch.
7. 如权利要求1所述的无线通信装置,其特征在于:所述电压信号的电压与接收信号强度的值成反比。 7. The wireless communication apparatus according to claim 1, wherein: a voltage inversely proportional to the received signal strength of the voltage signal.
8. 如权利要求1所述的无线通信装置,其特征在于:所述变容二极管正极与匹配电路共同接地,负极电性连接至电压转换电路与匹配电路之间的节点。 8. The wireless communication apparatus according to claim 1, wherein: the common grounded varactor diode matching circuits and the positive electrode, a negative electrode electrically connected to a node between the voltage conversion circuit and the matching circuit.
9. 如权利要求1所述的无线通信装置,其特征在于:所述变容二极管串联在电压转换电路与匹配电路之间。 9. The wireless communication apparatus according to claim 1, wherein: said variable-capacitance diode are connected in series between the voltage conversion circuit and the matching circuit.
CN201310568260.4A 2013-11-15 2013-11-15 The wireless communication device CN104639202A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1822512A (en) * 2005-02-18 2006-08-23 乐金电子(中国)研究开发中心有限公司 RF signal matching device of mobile communication terminal
CN101133560A (en) * 2005-02-17 2008-02-27 京瓷公司 Mobile station traffic state antenna tuning systems and methods
CN102420353A (en) * 2010-09-28 2012-04-18 宏达国际电子股份有限公司 Antenna module
EP2566062A1 (en) * 2010-06-03 2013-03-06 Broadcom Corporation Surface acoustic wave less receiver with frequency translated bandpass filter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101133560A (en) * 2005-02-17 2008-02-27 京瓷公司 Mobile station traffic state antenna tuning systems and methods
CN1822512A (en) * 2005-02-18 2006-08-23 乐金电子(中国)研究开发中心有限公司 RF signal matching device of mobile communication terminal
EP2566062A1 (en) * 2010-06-03 2013-03-06 Broadcom Corporation Surface acoustic wave less receiver with frequency translated bandpass filter
CN102420353A (en) * 2010-09-28 2012-04-18 宏达国际电子股份有限公司 Antenna module

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