WO2009082885A1 - Dispositif d'antenne de toit de voiture et son amplificateur - Google Patents

Dispositif d'antenne de toit de voiture et son amplificateur Download PDF

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Publication number
WO2009082885A1
WO2009082885A1 PCT/CN2008/070561 CN2008070561W WO2009082885A1 WO 2009082885 A1 WO2009082885 A1 WO 2009082885A1 CN 2008070561 W CN2008070561 W CN 2008070561W WO 2009082885 A1 WO2009082885 A1 WO 2009082885A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
circuit
capacitor
inductor
resistor
Prior art date
Application number
PCT/CN2008/070561
Other languages
English (en)
French (fr)
Inventor
Xiaoping Jiang
Original Assignee
Taizhou Suzhong Antenna Group Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Taizhou Suzhong Antenna Group Co., Ltd. filed Critical Taizhou Suzhong Antenna Group Co., Ltd.
Priority to PL08715297T priority Critical patent/PL2178160T3/pl
Priority to KR1020107007175A priority patent/KR101182106B1/ko
Priority to BRPI0821629-0A priority patent/BRPI0821629A2/pt
Priority to JP2010512494A priority patent/JP5042362B2/ja
Priority to ES08715297T priority patent/ES2394026T3/es
Priority to EP08715297A priority patent/EP2178160B1/en
Publication of WO2009082885A1 publication Critical patent/WO2009082885A1/zh
Priority to US12/701,348 priority patent/US8644790B2/en

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/12Supports; Mounting means
    • H01Q1/1207Supports; Mounting means for fastening a rigid aerial element
    • H01Q1/1214Supports; Mounting means for fastening a rigid aerial element through a wall
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/27Adaptation for use in or on movable bodies
    • H01Q1/32Adaptation for use in or on road or rail vehicles
    • H01Q1/325Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle
    • H01Q1/3275Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle mounted on a horizontal surface of the vehicle, e.g. on roof, hood, trunk
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/50Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00Antenna arrays or systems
    • H01Q21/30Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/50Feeding or matching arrangements for broad-band or multi-band operation
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F3/00Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/189High-frequency amplifiers, e.g. radio frequency amplifiers
    • H03F3/19High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only

Definitions

  • the present invention relates to an antenna device, and more particularly to an automotive overhead antenna device and an antenna amplifier thereof.
  • the antenna device is a radio signal receiving antenna for an automobile, and the antenna amplifier is particularly suitable for radio broadcasting AM/FM ( AM/FM) Used as a receiving device. Background technique
  • the currently used car antenna is an overhead rod antenna. Since the rod antenna is relatively long, the device on the top of the car will affect the aesthetics of the vehicle. In addition, common antennas generally have defects that are prone to be bad, and the antenna height is too high, and it is not convenient to use when washing the car and entering a space-limited place. In addition, the antenna rod is easy to be lost during use, and the antenna needs to be removed during transportation, which is inconvenient. Although there is a shark fin antenna with a relatively low height and beautiful appearance (such as Chinese patent application CN1841843A), due to the limited installation position of the antenna inside the casing, the car antenna is closer to the top of the car, and the radio signal is taken by the top of the car. The absorption of the board seriously affects the receiving effect of the antenna. Summary of the invention
  • One object of the present invention is to provide an antenna amplifier capable of reducing the absorption of a high frequency signal by a roof and increasing the receiving effect of the amplifier.
  • Another object of the present invention is to provide an automotive overhead antenna device that overcomes the aforementioned deficiencies of prior automotive overhead antennas.
  • the technical solution of the present invention is: an antenna amplifier for an automotive overhead antenna, the antenna amplifier comprising an AM frequency selection circuit, an AM signal amplification circuit, an FM frequency selection circuit, an FM signal amplification circuit, and a power supply circuit; wherein, the radio The receiving antenna AM/FM signal output terminal is simultaneously connected to the AM frequency selecting circuit and the FM frequency selecting circuit, and the AM frequency selecting circuit is connected to the AM signal amplifying circuit, and the FM frequency selective power is connected.
  • the circuit is connected to the FM signal amplifying circuit, and the signal output end of the AM signal amplifying circuit and the FM signal amplifying circuit is connected to the common output plug, and the ground end of the output plug is connected to the ground end of the antenna amplifier, and the power circuit supplies power to the antenna amplifier, wherein
  • the antenna amplifier is further provided with a blocking circuit, one end of which is connected to the ground of the antenna amplifier, and the other end is connected to the antenna metal mounting base on the top of the car.
  • the present invention also provides an automotive overhead antenna device, the antenna device having an antenna housing, a metal mounting base, an antenna bracket, and a radio receiving antenna, wherein the antenna housing is mounted on the metal mounting base to form an internal receiving space.
  • the antenna holder, the radio receiving antenna and the circuit board provided with the antenna amplifier are disposed in the accommodating space, the antenna bracket and the circuit board are mounted on the metal mounting base, and the radio receiving antenna is mounted on the antenna bracket, or passes through
  • the injection molding embedded or fixed card is installed on the inner side of the antenna casing; the antenna receiving end of the radio receiving antenna is provided with an antenna signal output end, the antenna signal output end of the radio receiving antenna is connected with the signal input end of the antenna amplifier, and the antenna amplifier signal is output by the coaxial cable.
  • the antenna amplifier is provided with a blocking circuit, one end of which is connected to the grounding end of the antenna amplifier, and the other end is connected to the antenna metal mounting base on the top of the automobile.
  • the antenna amplifier device of the present invention is provided with a wave blocking circuit, and the printed inductor L0 of the wave blocking circuit has a high inductive reactance in the AM/FM frequency range, and the potential of the antenna amplifier on the printed circuit board
  • the improvement is equivalent to increasing the height of the antenna amplifier on the metal mounting base, reducing the absorption of the high frequency signal by the roof, and increasing the receiving effect of the amplifier.
  • the radio receiving antenna of the present invention is an AM/FM shared antenna, which is mounted on an antenna bracket in the antenna casing, and the antenna casing can be a shark fin casing, and has a beautiful appearance and a relatively low height.
  • Figure 1 is a cross-sectional view showing a first embodiment of an automotive overhead antenna device of the present invention.
  • Figure 2 is a cross-sectional view showing a second embodiment of the automotive overhead antenna device of the present invention.
  • FIG. 3 is a perspective exploded view of a third embodiment of the automotive overhead antenna device of the present invention.
  • 4 is a schematic block diagram of an antenna amplifier of an automotive overhead antenna device of the present invention.
  • Fig. 5 is a circuit diagram of an antenna amplifier of the automotive overhead antenna device of the present invention.
  • Figure 6 is a resonance frequency diagram of a radio receiving antenna of the automotive overhead antenna device of the present invention.
  • Fig. 7 is a directional diagram (horizontal) of a radio receiving antenna of the automotive overhead antenna device of the present invention.
  • Figure 8 is a directional diagram (vertical) of a radio receiving antenna of the automotive overhead antenna device of the present invention.
  • the present invention provides an automotive overhead antenna device having an antenna housing 1, a metal mounting base 6, an antenna holder 3, and a radio receiving antenna 2, the antenna housing 1 being mounted on The metal mounting base 6 defines an internal accommodating space.
  • the accommodating space is provided with the antenna bracket 3, the radio receiving antenna 2 and the circuit board 4.
  • the antenna bracket 3 and the circuit board 4 are mounted on the metal mounting base 6.
  • the radio receiving antenna 2 is mounted on the antenna bracket 3, or is mounted on the inner side of the antenna casing by injection molding or a fixed card; the antenna receiving end of the radio receiving antenna is provided with an antenna signal output end, and the antenna signal output end is passed through the wire 5 It is connected to the signal input terminal of the antenna amplifier of the circuit board, and the output signal of the antenna amplifier is output from the coaxial cable 7 to the radio receiving device.
  • the antenna amplifier is connected to a power line 8, and the antenna amplifier power is supplied from a power line 8.
  • the antenna amplifier is further provided with a wave blocking circuit, one end of which is connected to the ground end of the antenna amplifier, and the other end is connected to the antenna metal mounting base on the top of the automobile.
  • the radio receiving antenna 2 is an AM/FM shared antenna, and the radio receiving antenna 2 is a metal helical antenna having a resonant frequency of 98 ⁇ 3 MHz.
  • FIG. 4 it is a schematic block diagram of an antenna amplifier of the present invention, which includes an AM frequency selection circuit, an AM signal amplification circuit, an FM frequency selection circuit, an FM signal amplification circuit, and a power supply circuit; wherein, the radio receiving antenna AM/ The FM signal output terminal is simultaneously connected to the AM frequency selection circuit and the FM frequency selection circuit, the AM frequency selection circuit is connected to the AM signal amplification circuit, the FM frequency selection circuit is connected to the FM signal amplification circuit, and the signals of the AM signal amplification circuit and the FM signal amplification circuit are connected.
  • the output end is connected to the common output plug, the ground end of the output plug is connected to the ground of the antenna amplifier, and the power circuit supplies power to the antenna amplifier, wherein the antenna amplifier is further provided with a blocking circuit, one end of the blocking circuit and the antenna amplifier The ground terminal is connected, and the other end is connected to the antenna metal mounting base on the top of the car.
  • the wave blocking circuit includes a printed inductor L0, one end of the printed inductor L0 is connected to the ground of the antenna amplifier, and the other end is connected to the antenna metal mounting base of the top of the automobile.
  • the printed inductor L0 can be an inductor made of a printed circuit board on a printed circuit board.
  • the AM frequency selection circuit of the antenna amplifier includes a capacitor C1, an inductor L1, L2, and a resistor R1.
  • the antenna TX is connected to the inductor L1 in the AM frequency selection circuit through the capacitor C1, and the inductor L2 is connected in parallel with the resistor R1.
  • the rear end is connected to L1, and the other end is connected to the AM signal amplifying circuit.
  • the AM signal amplifying circuit includes a field effect transistor VI, a triode V2, resistors R2 to R7, capacitors C2 to C5, and an inductor L3.
  • the signal of the AM frequency selection circuit is amplified by the field effect transistor VI of the AM signal amplifying circuit and the transistor V2. Transfer to the common output plug OUT; where: the gate of the FET VI is connected to the AM frequency selective circuit, the source of the FET VI is connected to the capacitor C2, the resistors R4, R7, the drain of the FET VI and the resistor R5 R6 and capacitor C3 are connected. The other end of the resistor R6 and the capacitor C3 are connected in parallel with the base of the transistor V2.
  • the collector of the transistor V2 is connected to the capacitor C4 and the other end of the resistor R7.
  • the emitter of the transistor V2 and the power circuit are The inductor L7 and the capacitor C15 are connected, and the capacitor C4 is connected to the common output plug OUT and the double diode D1 through the inductor L3.
  • the FET VI can be used with the MMBFJ310 FET.
  • the FM frequency selection circuit includes capacitors C6 to C9 and inductors L4 and L5.
  • the antenna TX is connected to the capacitor C6 in the FM frequency selection circuit through the capacitor CI, the other end of the capacitor C6 is connected to the inductor L4, and the other end of the inductor L4 is respectively connected to the inductor L5.
  • the capacitors C7 and C8 are connected, and the other end of the inductor L5 is grounded.
  • the ground terminal of the capacitor C7 is simultaneously connected to the roof through a resistor, and the other end of the capacitor C8 is respectively connected to the capacitor C9 and the FM signal amplifying circuit.
  • the FM signal amplifying circuit comprises a triode V3, resistors R8 to R13, capacitors C10 to C13, and an inductor L6; the base of the transistor V3 is connected to the capacitor C8, and has a base bias resistor and a lower bias resistor R8, R9, and The base bias resistor R9 is connected to the parallel resistor R10 and the capacitor C10 and then connected to the collector of the transistor V3.
  • the collector is connected to the common output plug OUT through the capacitor C12, and one end of the inductor L6 is connected to the collector of the transistor V3, and the other end is connected.
  • the resistors R12 and R13 are connected to the power supply circuit, and the emitter of the transistor V3 is connected to the emitter resistor R11 and the capacitor C11.
  • the power supply circuit includes a double diode D1, a capacitor C14, a C15, and an inductor L7; a +12V DC power supply is connected to the inductor L7 via a double diode D1 through a wire, and the other end of the inductor L7 is connected to the emitters of the capacitors C14, C15, the resistor R13 and the transistor V2, respectively.
  • the dual diode D1 can be a 1SS226 dual diode.
  • the antenna TX is connected to the electrostatic protector BL1.
  • the antenna TX converts the airborne wireless electromagnetic wave signal into an electrical signal, and after being electrostatically protected by the electrostatic protector BL, a DC signal is passed through the frequency selective circuit.
  • the inductor L1, L2 and the resistor R1 are selected, and the AM amplitude modulation signal is selected and input to the AM signal amplification circuit.
  • the signal of the AM frequency selection circuit is transmitted through the FET VI and the transistor V2 of the AM signal amplification circuit for two-stage amplification and transmission.
  • the bias resistors R2, R3 are used to adjust the FET VI operating current
  • the feedback resistor R4 the capacitor C2 is used to adjust the FET VI gain (magnification)
  • the load resistor R5 is used to adjust the field Effect tube VI gain
  • bias resistor R6 is used to adjust the operating current of transistor V2
  • capacitor C3 For the coupling capacitor, the AM electrical signal amplified by the FET VI is coupled to the base of the transistor V2 for further amplification
  • the resistor R7 is the load resistance of the transistor V2 for adjusting the gain of the transistor V2.
  • Capacitor C4 and inductor L3 are frequency-selective processing of the AM amplitude modulated output signal.
  • the other radio signal is selected by the capacitors C6 ⁇ C9 and the inductors L4 and L5 in the FM frequency selection circuit.
  • the frequency modulation signal is input to the transistor V3 in the TM signal amplifying circuit for signal amplification.
  • the amplified signal is coupled to the output of the common output plug OUT through the capacitor C12, wherein the bias resistors R8, R9, and R10 are the operating currents of the trim transistor V3, wherein the resistor R9 and the capacitor C10 are the feedback resistors and capacitors of the amplifier transistor V3. Stabilizes the triode V3.
  • Resistor Rl l, capacitor C11 adjusts the gain of transistor V3.
  • Inductor L6 is the load of transistor V3.
  • Capacitor C13 and resistors R12 and R13 are the power supply filter circuits of the amplifier.
  • the double diode D1 in the power circuit is an isolated diode for the commutating power supply of the coaxial cable and the power supply of the separate cable, and the inductor L7 and the capacitors C16 and C17 are the filter circuits of the power supply.
  • One end of the printed inductor L0 in the wave blocking circuit is connected to the ground of the wireless amplifier, and the other end is connected to the metal base of the antenna on the top of the car.
  • the printed inductor of the wave blocking circuit is highly sensitive in the AM/FM frequency range, and the antenna amplifier is The potential on the printed circuit board is increased, the absorption of high frequency signals by the roof is reduced, and the receiving effect of the amplifier is increased.
  • FIG. 1 to FIG. 3 it is a schematic structural view of a car overhead antenna of the present invention.
  • the shark fin antenna housing 1 is fixed to the metal mounting base 6, and the metal mounting base 6 is further provided with an antenna fixing device and a cable connecting port.
  • the antenna fixing device comprises a hollow screw and a fixing nut.
  • the cable connection port is disposed in the hollow screw.
  • the metal mounting base 6 of the automotive overhead antenna of the present invention can be provided with a plurality of circuit board mounting portions for flexible mounting of one or more circuit boards.
  • the mounting portion can be implemented in a variety of ways, such as a snap-fit structure.
  • FIG. 1 is a specific embodiment of a car overhead antenna of the present invention, wherein only one circuit board 4 is provided, and the circuit board 4 is provided with an AM/FM antenna amplifier, and the output of the radio receiving antenna 2 Both the terminal and the circuit board 4 are disposed at the lower front end of the shark fin antenna housing 1.
  • FIG. 2 is another embodiment of the automotive overhead antenna of the present invention, wherein only one circuit board 4 is provided, and the output end of the radio receiving antenna 2 and the circuit board 4 are both disposed on the shark fin antenna housing 1. A highly rear end.
  • each circuit board may include SDARS artificial Satellite digital (digital) audio receiving antenna circuit board 10, DTV digital (digital) television receiving antenna circuit board, GPS satellite navigation receiving antenna circuit board 9, DAB digital (digital) audio receiving antenna circuit board group or random combination.
  • the specific combination may be a SDARS satellite digital audio receiving antenna circuit board 10 and a DTV digital television receiving circuit board antenna, or a SDARS satellite digital audio receiving antenna circuit board 10 and a GPS satellite navigation receiving antenna circuit board 9, or It is equipped with DTV digital TV receiving antenna circuit board and GPS satellite navigation receiving antenna circuit board 9, and so on.
  • the working principle of the vehicle overhead antenna device of the present invention When the vehicle overhead antenna device is used, it is installed on the top and the outer side of the automobile, and is fixed by the antenna fixing screw, the fixing nut or other fixing components, and is received by the radio receiving antenna TX.
  • the radio signal is output from the antenna signal output terminal to the AM (amplitude modulation) frequency selection circuit and the FM (frequency modulation) frequency selection circuit.
  • the AM (amplitude modulation) signal is selected by the AM frequency selection circuit and sent to the AM signal amplification circuit for amplification.
  • the (amplitude modulation) signal is output to the car radio via the shared output plug.
  • the FM (frequency modulation) signal is frequency-selected by the FM (frequency modulation) frequency selection circuit and sent to the FM signal amplification circuit. After the FM (frequency modulation) signal is amplified by the FM signal amplification circuit, the FM FM (frequency modulation) signal is output to the automobile through the common output plug. Let go.
  • the printed inductor L0 of the blocking circuit has a high inductive reactance in the AM/FM frequency range, and the potential of the antenna amplifier on the printed circuit board is increased, which is equivalent to increasing the height of the antenna amplifier on the metal mounting base, and reducing the vehicle.
  • the absorption of the high frequency signal increases the receiving effect of the amplifier.
  • the radio receiving antenna of the vehicle overhead antenna of the present invention has a resonance frequency of 98 ⁇ 3 MHz, which is The reception effect is optimal.
  • a resonance frequency diagram of a radio receiving antenna of a car overhead antenna device of the present invention is shown. It can be seen from Fig. 6 that the center frequency point is 96 MHz in the frequency range of 87. 5-107. 5MHZ, and the signal transmission performance is the best at this time, and the frequency point is not drifted.
  • FIG. 7 Figure 8 shows the measured data every 5 degrees, each 72 points, reflecting the state of the car while driving. It can be explained from the drawings that the radio receiving antenna of the automotive overhead antenna of the present invention has a good horizontal and vertical receiving effect.
  • the car overhead antenna device of the present invention has a reasonable design and a compact structure. Since the radio receiving antenna is an AM/FM shared antenna, the device is in the antenna casing, and the antenna casing adopts a shark fin casing, and the outer shape design is beautiful, and the height is compared. Low, since the antenna amplifier device of the present invention is provided with a wave blocking circuit, the printed inductor L0 of the wave blocking circuit has a high inductive reactance in the AM/FM frequency range, and the potential of the antenna amplifier on the printed circuit board is increased, which is equivalent to an increase. The height of the antenna amplifier on the metal mounting base reduces the absorption of high frequency signals by the roof and increases the receiving effect of the amplifier.
  • the radio receiving antenna of the car overhead antenna device AM/FM shared the antenna.
  • the device has good sealing performance in the antenna casing.
  • the antenna height is low. When the car washes and enters a space-constrained place, the antenna does not need to be lowered, and the use is extremely convenient. In addition, the antenna rod will not be lost during the use of the antenna, and it is not necessary to remove the antenna during transportation.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Remote Sensing (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Details Of Aerials (AREA)
  • Amplifiers (AREA)

Description

汽车顶默线 ¾¾¾其天线放大器 技术领域
本发明是有关于一种天线装置,尤其是指一种汽车顶置天线装置及其天 线放大器, 该天线装置为一种汽车用无线电信号接收天线, 其天线放大器尤 其适用于无线电广播 AM/FM (调幅 /调频) 作接收装置用。 背景技术
目前普遍使用的汽车天线是顶置杆状天线, 由于杆状天线比较长, 装置 在汽车顶部会影响到整车的美观。另外,常见的天线普遍存在容易坏的缺陷, 天线高度过高, 洗车及进入空间受限的场所时, 使用不够方便。 另外, 天线 在使用过程中, 天线杆容易失落, 运输过程中需把天线拆下, 不方便。 虽然 出现了一种高度比较低、 外形比较美观的鲨鱼鳍式天线 (如中国专利申请 CN1841843A) , 但由于壳体内部天线安装位置受限, 汽车天线离汽车顶部比 较近, 无线电信号被汽车顶部铁板吸收, 严重影响了天线的接收效果。 发明内容
本发明的目的之一是, 提供一种天线放大器, 其能够减少车顶对高频信 号的吸收, 增加了放大器的接收效果。
本发明的另一目的是, 提供一种汽车顶置天线装置, 以克服现有汽车顶 置天线的上述不足之处。
本发明的技术解决方案是: 一种用于汽车顶置天线的天线放大器, 该天 线放大器包括 AM选频电路、 AM信号放大电路、 FM选频电路、 FM信号放大 电路、 电源电路; 其中, 无线电接收天线 AM/FM信号输出端同时连接到 AM 选频电路和 FM选频电路, AM选频电路与 AM信号放大电路相连, FM选频电 路与 FM信号放大电路相连, AM信号放大电路与 FM信号放大电路的信号输 出端连接到共用输出插头, 输出插头的接地端与天线放大器接地端相连, 电 源电路为天线放大器提供电源, 其中, 所述天线放大器还设有阻波电路, 该 阻波电路的一端与天线放大器接地端相连,另一端与汽车顶部的天线金属安 装底座相连。
本发明还提出一种汽车顶置天线装置, 该天线装置具有天线外壳、金属 安装底座、 天线支架、无线电接收天线, 所述天线外壳安装在该金属安装底 座上, 构成内部的容置空间, 该容置空间内设有该天线支架、无线电接收天 线及设有天线放大器的电路板,该天线支架及所述电路板装设于金属安装底 座, 该无线电接收天线装设于该天线支架, 或通过注塑嵌装或固定卡装设于 天线外壳内侧上部; 无线电接收天线一端设有天线信号输出端, 无线电接收 天线的天线信号输出端与天线放大器的信号输入端连接,天线放大器信号由 同轴电缆输出至无线电接收装置, 其中, 所述天线放大器设有阻波电路, 该 阻波电路的一端与天线放大器接地端相连,另一端与汽车顶部的天线金属安 装底座相连。
本发明的特点和优点是: 本发明的天线放大器装置设置有阻波电路, 阻 波电路的印刷电感 L0在 AM/FM频率范围内感抗很高, 将天线放大器在印刷 电路板上地的电位提高了,相当于提高了天线放大器对金属安装底座上的高 度, 减少了车顶对高频信号的吸收, 增加了放大器的接收效果。 而且, 本发 明的无线电接收天线为 AM/FM共用天线, 装在天线外壳内的天线支架上, 天 线外壳可采用鲨鱼鳍式外壳, 外形设计美观, 高度比较低。 附图说明
以下附图仅旨在于对本发明做示意性说明和解释,并不限定本发明的范 围。 其中, 图 1是本发明的汽车顶置天线装置的第一实施例的剖视图。
图 2是本发明的汽车顶置天线装置的第二实施例的剖视图。
图 3是本发明的汽车顶置天线装置的第三实施例的立体分解示意图。 图 4是本发明的汽车顶置天线装置的天线放大器的原理框图。
图 5是本发明的汽车顶置天线装置的天线放大器的电路图。
图 6是本发明的汽车顶置天线装置的无线电接收天线共振频率图。
图 7是本发明的汽车顶置天线装置的无线电接收天线方向性图(水平)。 图 8是本发明的汽车顶置天线装置的无线电接收天线方向性图(垂直)。 具体实施方式
为了对本发明的技术特征、 目的和效果有更加清楚的理解, 现对照附图 说明本发明的具体实施方式。
参照附图 1〜图 8所示, 本发明提出一种汽车顶置天线装置, 该天线装 置具有天线外壳 1、 金属安装底座 6、 天线支架 3及无线电接收天线 2, 所 述天线外壳 1安装在该金属安装底座 6上, 构成内部的容置空间, 该容置空 间内设有该天线支架 3、 无线电接收天线 2及电路板 4, 该天线支架 3及电 路板 4装设于金属安装底座 6, 该无线电接收天线 2装设于该天线支架 3, 或通过注塑嵌装或固定卡装在天线外壳内侧上部;无线电接收天线 2—端设 有天线信号输出端,其天线信号输出端通过导线 5与电路板的天线放大器的 信号输入端连接,天线放大器的输出信号由同轴电缆 7输出至无线电接收装 置。 天线放大器连接有电源线 8, 天线放大器电源由电源线 8提供。 其中, 所述天线放大器还设有阻波电路,该阻波电路的一端与天线放大器接地端相 连, 另一端与汽车顶部的天线金属安装底座相连。
在本发明的一具体实施例中, 该无线电接收天线 2为 AM/FM共用天线, 无线电接收天线 2采用金属螺旋状天线, 其共振频率为 98 ± 3MHz。 如图 4所示, 为本发明的天线放大器的原理框图, 该天线放大器包括 AM选 频电路、 AM信号放大电路、 FM选频电路、 FM信号放大电路、 电源电路; 其 中,无线电接收天线 AM/FM信号输出端同时连接到 AM选频电路和 FM选频电 路, AM选频电路与 AM信号放大电路相连, FM选频电路与 FM信号放大电路 相连, AM信号放大电路与 FM信号放大电路的信号输出端连接到共用输出插 头, 输出插头的接地端与天线放大器接地端相连, 电源电路为天线放大器提 供电源, 其中, 所述天线放大器还设有阻波电路, 该阻波电路的一端与天线 放大器接地端相连, 另一端与汽车顶部的天线金属安装底座相连。
在本发明的一具体实施例中, 如图 5所示, 所述阻波电路包括印刷电感 L0, 该印刷电感 L0的一端与天线放大器接地端相连, 另一端与汽车顶部的 天线金属安装底座相连。 其中, 印刷电感 L0可以为印刷电路板上用印刷线 路制成的电感。
如图 5所示, 为本发明的天线放大器的一具体实施例的电路图。从图中 可以看出, 天线放大器的 AM选频电路包括电容 Cl、 电感 Ll、 L2、 电阻 Rl; 其中: 天线 TX通过电容 C1与 AM选频电路中的电感 L1相连, 电感 L2与电 阻 R1并联后一端与 L1相连, 另一端连结至 AM信号放大电路。
AM信号放大电路包括场效应管 VI、三极管 V2、 电阻 R2〜R7、 电容 C2〜 C5、 电感 L3; AM选频电路的信号通过 AM信号放大电路的场效应管 VI、 三 极管 V2进行两级放大后传送到共用输出插头 OUT; 其中: 场效应管 VI的栅 极与 AM选频电路相连, 场效应管 VI的源极与电容 C2、 电阻 R4、 R7相连, 场效应管 VI的漏极与电阻 R5、 R6、 电容 C3相连, 电阻 R6、 电容 C3并联后 的另一端与三极管 V2的基极相连, 三极管 V2的集电极与电容 C4、 电阻 R7 的另一端相连, 三极管 V2的发射极与电源电路的电感 L7、 电容 C15相连, 电容 C4通过电感 L3与共用输出插头 0UT、 双二极管 D1相连。 场效应管 VI 可采用 MMBFJ310场效应管。 FM选频电路包括电容 C6〜C9、 电感 L4、 L5; 天线 TX通过电容 CI与 FM 选频电路中的电容 C6相连, 电容 C6的另一端与电感 L4相连, 电感 L4另一 端分别与电感 L5、 电容 C7、 C8相连, 电感 L5的另一端接地, 电容 C7的接 地端同时通过一电阻接至车顶棚, 电容 C8另一端分别接电容 C9、 FM信号放 大电路。
FM信号放大电路包括三极管 V3、 电阻 R8〜R13、 电容 C10〜C13、 电感 L6; 三极管 V3的基极与电容 C8相连, 且设有基极上偏置电阻和下偏置电阻 R8、 R9, 且基极上偏置电阻 R9与并联的电阻 R10、 电容 C10相连后接至三 极管 V3的集电极, 该集电极通过电容 C12与共用输出插头 OUT相连, 电感 L6一端与三极管 V3集电极相连, 另一端通过电阻 R12、 R13与电源电路相 连, 三极管 V3的发射极接有发射极电阻 R11及电容 Cll。
电源电路包括双二极管 Dl、 电容 C14、 C15、 电感 L7; + 12V直流电源 通过导线经双二极管 D1与电感 L7相连, 电感 L7另一端分别与电容 C14、 C15、 电阻 R13及三极管 V2的发射极相连。双二极管 D1可采用 1SS226双二 极管。
如图 5所示, 为了进一步保证天线的接收效果, 天线 TX连接有静电保 护器 BL1。
参照图 5所示, 本发明天线放大器的工作原理: 天线 TX将空中无线电 磁波信号转化为电信号, 经过静电保护器 BL进行静电保护后, 经隔直流电 容 Cl, 一路无线电信号通过选频电路中电感 Ll、 L2、 电阻 R1进行选频, 将 AM调幅信号选出, 输入到 AM信号放大电路, AM选频电路的信号通过 AM信 号放大电路的场效应管 VI、 三极管 V2进行两级放大后传送到共用输出插头 OUT输出, 其中偏置电阻 R2、 R3用于调节场效应管 VI工作电流, 反馈电阻 R4、 电容 C2用于调节场效应管 VI增益 (放大倍数) , 负载电阻 R5用于调 节场效应管 VI增益, 偏置电阻 R6用于调节三极管 V2的工作电流, 电容 C3 为耦合电容, 将场效应管 VI放大的 AM电信号耦合到三极管 V2的基极进一 步放大, 电阻 R7是三极管 V2的负载电阻, 用于调节三极管 V2增益。 电容 C4、 电感 L3是对 AM调幅输出信号进行选频处理。
另一路无线电信号通过 FM选频电路中的电容 C6〜C9、 电感 L4、 L5进 行选频, 通过电容 C8、 C9进行分压后, 将调频信号输入到 TM信号放大电路 中的三极管 V3进行信号放大, 放大后的信号经电容 C12耦合到共用输出插 头 OUT输出, 其中偏置电阻 R8、 R9、 R10是调节三极管 V3的工作电流, 其 中电阻 R9、 电容 C10又是放大三极管 V3的反馈电阻、 电容, 对三极管 V3 起稳定作用。 电阻 Rl l、 电容 C11调节三极管 V3增益。 电感 L6是三极管 V3 的负载。 电容 C13、 电阻 R12、 R13是放大器的电源滤波电路。
电源电路中双二极管 D1为同轴电缆换向供电和单独电缆供电的隔离二 极管, 电感 L7、 电容 C16、 C17为电源的滤波电路。
阻波电路中的印刷电感 L0的一端与无线放大器接地端相连, 另一端与 汽车顶部的天线金属底座相连,阻波电路的印刷电感在 AM/FM频率范围内感 抗很高, 将天线放大器在印刷电路板上地的电位提高了, 减少了车顶对高频 信号的吸收, 增加了放大器的接收效果。
如图 1〜图 3所示, 为本发明的汽车顶置天线的结构示意图。 鲨鱼鳍式 天线外壳 1固定于金属安装底座 6, 且金属安装底座 6上还设有天线固定装 置及缆线连接口,本发明的一具体实施例中,该天线固定装置包括中空螺杆、 固定螺母, 缆线连接口设置在中空螺杆内。
本发明的汽车顶置天线的金属安装底座 6上可设有多个电路板安装部, 以实现一个或多个电路板的灵活安装。该安装部可由多种方式来实现, 例如 卡扣结构。
图 1为本发明的汽车顶置天线的具体实施例之一, 其中, 仅设有一电路 板 4, 该电路板 4上设有 AM/FM天线放大器, 且该无线电接收天线 2的输出 端和电路板 4均设于鲨鱼鳍式天线外壳 1的高度较小的前端。
图 2为本发明的汽车顶置天线的另一具体实施例, 其中, 仍只设有一电 路板 4, 且该无线电接收天线 2的输出端和电路板 4均设于鲨鱼鳍式天线外 壳 1的高度较大的后端。
再如图 3所示, 为本发明的汽车顶置天线的又一具体实施例, 其中, 该 金属安装底座 6上设有三块接收天线电路板 4、 9、 10,各电路板可包括 SDARS 人造卫星数码(数字)音频接收天线电路板 10、 DTV数码(数字) 电视接收 天线电路板、 GPS卫星导航接收天线电路板 9、 DAB数码 (数字) 音频接收 天线电路板群组中的一种或其任意组合。具体组合方式可为装有 SDARS人造 卫星数码音频接收天线电路板 10与 DTV数码电视接收电路板天线, 或装有 SDARS人造卫星数码音频接收天线电路板 10与 GPS卫星导航接收天线电路 板 9, 或装有 DTV数码电视接收天线电路板与 GPS卫星导航接收天线电路板 9, 等。
本发明的汽车顶置天线装置的工作原理: 汽车顶置天线装置使用时, 安 装在汽车顶部及外侧有关部位, 通过天线固定螺杆、 固定螺母或其它固定部 件固定稳固, 当无线电接收天线 TX接收到无线电信号, 由天线信号输出端 分别输到 AM (调幅) 选频电路、 FM (调频) 选频电路, AM (调幅) 信号经 AM选频电路选频后送到 AM信号放大电路放大后, AM (调幅)信号经共用输 出插头输出到汽车收放机。 FM (调频) 信号经 FM (调频) 选频电路选频后 送到 FM信号放大电路, FM (调频) 信号经 FM信号放大电路放大后, 调频 FM (调频) 信号经共用输出插头输出到汽车收放机。
阻波电路的印刷电感 L0在 AM/FM频率范围内感抗很高, 将天线放大器 在印刷电路板上地的电位提高了,相当于提高了天线放大器对金属安装底座 上的高度, 减少了车顶对高频信号的吸收, 增加了放大器的接收效果。
本发明汽车顶置天线的无线电接收天线其共谐振频率为 98 ± 3MHz, 此 时的接收效果为最佳。 参见图 6, 为本发明的汽车顶置天线装置的无线电接 收天线共振频率图。从图 6中可以看出, 在 87. 5-107. 5MHZ频率范围内中心 频率点为 96MHz , 此时的信号传输性能是最好的, 频率点未漂移。
参见附图 7、 8, 为本发明的汽车顶置天线装置的无线电接收天线水平 和垂直方向性图, 即将天线安装在汽车上, 于天线测试场进行水平和垂直方 向性接收性能测试, 图 7、 图 8显示为每 5度测量一次测得的数据, 各 72 个点, 体现汽车行驶时的状态。从附图中可以说明本发明汽车顶置天线的无 线电接收天线水平、 垂直方向接收效果好。
综上所述, 本发明的汽车顶置天线装置设计合理、 结构紧凑, 由于无线 电接收天线为 AM/FM共用天线, 装置在天线外壳内, 天线外壳采用鲨鱼鳍式 外壳, 外形设计美观, 高度比较低, 由于本发明天线放大器装置设置有阻波 电路, 阻波电路的印刷电感 L0在 AM/FM频率范围内感抗很高, 将天线放大 器在印刷电路板上地的电位提高了,相当于提高了天线放大器对金属安装底 座上的高度, 减少了车顶对高频信号的吸收, 增加了放大器的接收效果。 汽 车顶置天线装置无线电接收天线 AM/FM共用天线,装置在天线外壳内密封性 好不容易损坏,天线高度低,洗车及进入空间受限的场所时,天线无须放下, 使用极为方便。 另外, 天线在使用过程中, 天线杆不会失落, 运输过程中无 须把天线拆下, 极为方便。

Claims

权 利 要 求 书
1、 一种用于汽车顶置天线的天线放大器, 该天线放大器包括 AM选 频电路、 AM信号放大电路、 FM选频电路、 FM信号放大电路、 电源电路; 其 中, 无线电接收天线 AM/FM信号输出端同时连接到 AM选频电路和 FM选频 电路, AM选频电路与 AM信号放大电路相连, FM选频电路与 FM信号放大电 路相连, AM信号放大电路与 FM信号放大电路的信号输出端连接到共用输出 插头, 输出插头的接地端与天线放大器接地端相连, 电源电路为天线放大 器提供电源, 其中, 所述天线放大器还设有阻波电路, 该阻波电路的一端 与天线放大器接地端相连, 另一端与汽车顶部的天线金属安装底座相连。
2、 如权利要求 1所述的天线放大器, 其中, 所述阻波电路包括印刷 电感 (L0), 该印刷电感 (L0)的一端与天线放大器接地端相连, 另一端与汽 车顶部的天线金属安装底座相连。
3、 如权利要求 2所述的天线放大器, 其中, 所述印刷电感 (L0) 为 印刷电路板上用印刷线路制成的电感。
4、 如权利要求 2所述的天线放大器, 其中, 所述天线放大器的 AM 选频电路包括电容 (Cl)、 电感 (Ll、 L2)、 电阻 (Rl) ; 其中: 天线 (TX) 通 过电容(C1 )与 AM选频电路中的电感(L1 )相连, 电感(L2)与电阻(R1 ) 并联后一端与 L1相连, 另一端连结至 AM信号放大电路。
5、 如权利要求 4所述的天线放大器, 其中, 所述 AM信号放大电路 包括两级放大电路, AM选频电路的信号通过 AM信号放大电路的效应管 (VI)、 三极管 (V2)进行两级放大后传送到共用输入插头 (OUT) 。
6、 如权利要求 5所述的天线放大器, 其中, 所述第一级放大电路为 场效应管放大电路, 第二级放大电路为三极管放大电路, 场效应管 (VI)的 栅极连接有电阻 (R2、 R3) 、 漏极端连接有电阻 (R5) , 源极端连接电阻 (R4)、电容(C2);第二级放大电路的三极管 (V2)的基极连接有电阻 (R6)、 电容 (C3), 其集电极连接有电阻 (R7) ; 其中: 场效应管 (VI)的栅极与 AM 选频电路相连, 场效应管 (VI)的漏极连接电阻 (R5)的同时经并联连接的电 容 (C3)、 电阻 (R6) 连接至三极管 (VI ) 的基极, 三极管 (V2)的发射极连 接至电源电路, 三极管 (V2)的集电极与电阻 (R7)相连, 同时连接至共用输 出插头 (OUT) 。
7、 如权利要求 6所述的天线放大器, 其中, 所述 AM信号放大电路 还包括输出信号选频电路,该输出信号选频电路包括电容(C4)、电感 (L3), 三极管 (V2)的集电极通过输出信号选频电路的电容 (C4) 及电感 (L3) 连 接至共用输出插头 (OUT) 。
8、 如权利要求 7所述的天线放大器, 其中, 所述 FM选频电路包括 电容 (C6)、 电感 (L4、 L5) 、 电容 (C7〜C9) ; 天线 (TX) 通过电容 (C1 ) 与 FM选频电路中的电容 (C6)相连, 电容 (C6) 的另一端与电感 (L4) 相 连, 电感 (L4) 另一端分别与电感 (L5) 、 电容 (C7、 C8) 相连, 且电容 (C8) 另一端分别接电容 (C9) 、 FM信号放大电路, 电容 (C7) 的另一端 接地, 同时通过一电容接至车顶棚。
9、 如权利要求 8所述的天线放大器, 其中, 所述 FM信号放大电路 包括三极管(V3)、电阻(R8〜R13)、电容 (C10〜C13)、电感(L6) ;三极管(V3) 的基极与电容(C8)相连, 且设有基极上偏置电阻和下偏置电阻(R8、 R9), 且基极上偏置电阻 (R9) 与并联的电阻 (R10) 、 电容 (C10) 相连后接至 三极管 (V3) 的集电极, 该集电极通过电容 (C12) 与共用输出插头 (OUT) 相连, 电感(L6)—端与三极管(V3)集电极相连, 另一端通过电阻(R12、 R13) 与电源电路相连, 三极管 (V3) 的发射极接有发射极电阻 (R11 ) 及 旁路电容 (C11 ) 。
10、 如权利要求 9所述的天线放大器, 其中, 所述电源电路包括双二 极管 (Dl)、 电容 (C14、 C15)、 电感 (L7) ; 直流电源通过导线并经双二极管
(D1 ) 与电感 (L7 ) 相连, 电感 (L7) 另一端分别与电容 (C14、 C15) 、 电阻 (R13) 及三极管 (V2) 的发射极相连。
11、 如权利要求 10所述的天线放大器, 其中, 所述天线 (TX) 连接 有静电保护器 (BL1 ) 。
12、 一种汽车顶置天线装置, 该天线装置具有天线外壳、 金属安装底 座、 天线支架、 无线电接收天线, 所述天线外壳安装在该金属安装底座上, 构成内部的容置空间, 该容置空间内设有该天线支架、 无线电接收天线及 设有天线放大器的电路板, 该天线支架及所述电路板装设于金属安装底座, 该无线电接收天线装设于该天线支架, 或通过注塑嵌装或固定卡装设于天 线外壳内侧上部; 无线电接收天线一端设有天线信号输出端, 无线电接收 天线的天线信号输出端与天线放大器的信号输入端连接, 天线放大器信号 由同轴电缆输出至无线电接收装置, 其中, 所述天线放大器设有阻波电路, 该阻波电路的一端与天线放大器接地端相连, 另一端与汽车顶部的天线金 属安装底座相连。
13、 如权利要求 12所述的汽车顶置天线装置, 其中, 该天线放大器 包括 AM选频电路、 AM信号放大电路、 FM选频电路、 FM信号放大电路、 电 源电路; 其中, 无线电接收天线 AM/FM信号输出端同时连接到 AM选频电路 和 FM选频电路, AM选频电路与 AM信号放大电路相连, FM选频电路与 FM 信号放大电路相连, AM信号放大电路与 FM信号放大电路的信号输出端连接 到共用输出插头, 输出插头的接地端与天线放大器接地端相连, 电源电路 为天线放大器提供电源。
14、 如权利要求 13所述的汽车顶置天线装置, 其中, 所述阻波电路 包括印刷电感 (L0), 该印刷电感 (L0)的一端与天线放大器接地端相连, 另 一端与汽车顶部的天线金属安装底座相连。
15、 如权利要求 14所述的汽车顶置天线装置, 其中, 所述天线放大 器的 AM选频电路包括电容 (Cl)、电感 (L1、 L2)、电阻 (R1) ;其中:天线(TX) 通过电容(C1 )与 AM选频电路中的电感(L1 )相连, 电感(L2 )与电阻(R1 ) 并联后一端与 LI相连, 另一端连结至 AM信号放大电路。
16、 如权利要求 15所述的汽车顶置天线装置, 其中, 所述 AM信号放 大电路包括场效应管 (VI)、 三极管 (V2)、 电阻 (R2〜R7)、 电容 (C2〜C5)、 电感 (L3) ; AM选频电路的信通过 AM信号放大电路的效应管 (VI)、 三极管 (V2)进行两级放大后传送到共用输入插头 (OUT) ; 其中: 场效应管 (VI)的 栅极与 AM选频电路相连, 场效应管 (VI)的源极与电容 (C2)、 电阻 (R4、 R7) 相连, 场效应管 (VI)的漏极与电阻 (R5、 R6)、 电容 (C3)相连, 电阻 (R6)、 电容 (C3)并联后的另一端与三极管 (V2)的基极相连, 三极管 (V2)的集电极 与电容 (C4)、 电阻 (R7)的另一端相连, 三极管 (V2)的发射极与电源电路的 电感 (L7)、电容 (C15)相连,电容(C4)通过电感(L3)与共用输出插头(0UT)、 双二极管 (D1 ) 相连。
17、 如权利要求 16所述的汽车顶置天线装置, 其中, 所述 FM选频电 路包括电容 (C6〜C9)、 电感(L4、 L5) ; 天线 (TX) 通过电容 (C1 ) 与 FM选 频电路中的电容 (C6) 相连, 电容 (C6) 的另一端与电感 (L4) 相连, 电 感 (L4) 另一端分别与电感 (L5) 、 电容 (C7、 C8) 相连, 且电容 (C8) 另一端分别接电容 (C9) 、 FM信号放大电路。
18、 如权利要求 17所述的汽车顶置天线装置, 其中, 所述 FM信号放 大电路包括三极管(V3)、 电阻(R8〜R13)、 电容 (C10〜C13)、 电感 (L6) ; 三 极管 (V3)的基极与电容 (C8) 相连, 且设有基极上偏置电阻和下偏置电阻 (R8、 R9) , 且基极上偏置电阻 (R9) 与并联的电阻 (R10) 、 电容 (C10) 相连后接至三极管 (V3) 的集电极, 该集电极通过电容 (C12) 与共用输出 插头 (OUT) 相连, 电感 (L6) —端与三极管 (V3) 集电极相连, 另一端通 过电阻(R12、 R13)与电源电路相连,三极管(V3)的发射极接有电阻(R11 ) 及电容 (en ) 。
19、 如权利要求 18所述的汽车顶置天线装置, 其中, 所述电源电路 包括双二极管 (Dl)、 电容 (C14、 C15)、 电感 (L7) ; 直流电源通过导线并经 双二极管 (D1 ) 与电感 (L7 ) 相连, 电感 (L7 ) 另一端分别与电容 (C14、 C15 ) 、 电阻 (R13 ) 及三极管 (V2 ) 的发射极相连。
20、 如权利要求 19所述的汽车顶置天线装置, 其中, 所述天线 (TX) 连接有静电保护器 (BL1 ) 。
21、 如权利要求 20所述的汽车顶置天线装置, 其特征在于, 所述无 线电接收天线为 AM/FM共用天线, 无线电接收天线采用金属螺旋状天线。
22、 如权利要求 21 所述的汽车顶置天线装置, 其特征在于, 所述天 线外壳设置为鲨鱼鳍式外壳。
23、 如权利要求 12所述的汽车顶置天线装置, 其特征在于, 所述金 属安装底座上还装有 SDARS人造卫星数码音频接收天线电路板、 DTV数码电 视接收天线电路板、 GPS卫星导航接收天线电路板、 DAB数码音频接收天线 电路板各群组中的一种或其任意组合。
24、 如权利要求 23所述的汽车顶置天线装置, 其中, 其组合方式为 装有 SDARS人造卫星数码音频接收天线电路板与 DTV数码电视接收电路板 天线, 或装有 SDARS人造卫星数码音频接收天线电路板与 GPS卫星导航接 收天线电路板, 或装有 DTV数码电视接收天线电路板与 GPS卫星导航接收 天线电路板。
PCT/CN2008/070561 2007-12-26 2008-03-21 Dispositif d'antenne de toit de voiture et son amplificateur WO2009082885A1 (fr)

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BRPI0821629-0A BRPI0821629A2 (pt) 2007-12-26 2008-03-21 Dispositivo de antena de teto de automóvel e amplificador de antena para o mesmo
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EP08715297A EP2178160B1 (en) 2007-12-26 2008-03-21 Antenna device on the top of the car and antenna amplifier thereof
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