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    • 3. 发明专利
    • Frequency converting circuit, radio frequency receiver, and radio frequency transceiver
    • 频率转换电路,无线电频率接收机和无线电频率收发器
    • JP2005136830A
    • 2005-05-26
    • JP2003372535
    • 2003-10-31
    • Sharp Corpシャープ株式会社
    • ADAN ALBERT OKAMIYA SHINJI
    • H03D7/00H03D7/14H03D7/18H03K9/00H04B1/16H04B1/26H04B1/40
    • H04B1/408H03D7/1441H03D7/1458H03D7/1466H03D7/165H03D2200/0084
    • PROBLEM TO BE SOLVED: To provide a frequency converting circuit, a radio frequency receiver, and a radio frequency transceiver, which are integrated into an integrated circuit, and made in a smaller size.
      SOLUTION: A first mixer 204 is provided for mixing the radio frequency signal of a frequency f
      RF with the first local oscillation signal 205 of a frequency f
      LO1 so as to downconvert the radio frequency signal of a frequency f
      RF into an intermediate frequency signal. Two mixers 207A and 207B are provided for mixing the intermediate frequency signal outputted from the first mixer 204 with two second local oscillation signals 208 having a mutually distinct phase at a frequency f
      LO2 , so as to downconvert the intermediate frequency signal into two baseband signals 209A and 209B having a mutually distinct phase. The phases of the two second local oscillation signals 208 are set to 0° and 270°, respectively. In addition, relations expressed by equations f
      LO1 =k×f
      RF (k>1), f
      LO2 =f
      LO1 /m(m>1) and k=m/(m-1) are met.
      COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:提供集成到集成电路中并制成较小尺寸的频率转换电路,射频接收器和射频收发器。 解决方案:提供第一混频器204,用于将频率f RF 的射频信号与频率f LO1 的第一本地振荡信号205进行混频,以便 将频率f RF 的射频信号下变频成中频信号。 提供两个混频器207A和207B,用于将从第一混频器204输出的中频信号与在频率f LO2 具有相互不同相位的两个第二本地振荡信号208进行混频,以便将中间 频率信号分成具有相互不同相位的两个基带信号209A和209B。 两个第二本地振荡信号208的相位分别设定为0°和270°。 另外,由等式f = k×f (k> 1)表示的关系,f LO2 = f LO1 < / SB> / m(m> 1)和k = m /(m-1)。 版权所有(C)2005,JPO&NCIPI
    • 6. 发明专利
    • mRFID reader
    • 空值
    • JP5324451B2
    • 2013-10-23
    • JP2009529103
    • 2007-09-04
    • サムスン エレクトロニクス カンパニー リミテッド
    • コー シ−ギョウンカン ウー−シクリー ヒュン−バイ
    • H04L27/22G06K7/10G06K17/00
    • H04B1/408H04L27/0014
    • A mobile radio frequency identification (mRFID) reader having a receiving circuit is provided. The receiving circuit includes a local oscillator which generates a carrier signal at a predetermined frequency band; a mixer which mixes a tag signal received from a tag with the carrier signal, to lower a frequency of the tag signal; a phase adjusting block which adjusts a phase of the carrier signal by determining a phase of the tag signal; and a control block which processes the tag signal through a series of operations, and controls an operation of the phase adjusting block to compensate for a phase delay of the tag signal according to an output of the processed tag signal. Because the mRFID reader can be provided as small as a half size of a related art reader, a mobile communication terminal accommodating the mRFID reader can be compact-sized. Additionally, because the number of components for the receiving circuit decreases, not only the power consumption but also the unit price can be reduced.
    • 提供具有接收电路的移动射频识别(mRFID)读取器。 所述接收电路包括以预定频带产生载波信号的本地振荡器; 混合器,其将从标签接收的标签信号与载波信号混合,以降低标签信号的频率; 相位调整块,通过确定标签信号的相位来调整载波信号的相位; 以及通过一系列操作来处理标签信号的控制块,并且控制相位调整块的操作,以根据处理的标签信号的输出来补偿标签信号的相位延迟。 由于mRFID读取器可以被提供为相关技术读取器的一半的尺寸,所以容纳mRFID读取器的移动通信终端可以是紧凑型的。 此外,由于接收电路的部件数量减少,所以不仅可以降低功耗,而且降低单价。
    • 10. 发明专利
    • Transmission reception unit
    • 传输接收单元
    • JP2003032035A
    • 2003-01-31
    • JP2001216998
    • 2001-07-17
    • Alps Electric Co Ltdアルプス電気株式会社
    • ITO SHIGEHIROSAITO YOSHIO
    • G07B15/00H01Q13/08H01Q23/00H04B1/38H04B1/3822H05K1/16
    • H04B1/408H05K1/16
    • PROBLEM TO BE SOLVED: To provide a transmission reception unit that can be downsized while suppressing the effect on a radiation characteristic of an antenna and simplify the configuration of the antenna.
      SOLUTION: An antenna patch 4 and an IF circuit section 5 having a large frequency difference are placed on the same side of a multi-layer board 1, high frequency circuits such as a local oscillation section 22 and a modulation section 23 except the IF circuit section 5 are placed on the other side of the multi-layer board 1, a ground conductor pattern 2A is provided in the inside of the multi-layer board 1, and a circuit conductor pattern 2 exposed to the other side of the multi-layer board 1 is conducted to a feeding point of the antenna patch 4 via a through-hole 8.
      COPYRIGHT: (C)2003,JPO
    • 要解决的问题:提供可以抑制对天线的辐射特性的影响的小型化的发送接收单元,并且简化天线的配置。 解决方案:具有较大频率差的天线贴片4和IF电路部分5放置在多层板1的同一侧,除了IF电路之外的诸如本地振荡部分22和调制部分23的高频电路 部分5放置在多层板1的另一侧,在多层板1的内部设置接地导体图案2A,并且暴露于多层板1的另一侧的电路导体图案2 板1通过通孔8传导到天线贴片4的馈电点。