-
公开(公告)号：US06704562B1
公开(公告)日：2004-03-09
申请号：US09593676
申请日：2000-06-14
申请人： Gerald Oberschmidt , Veselin Brankovic , Dragan Krupezevic , Masayoshi Abe , Thomas Dölle , Tino Konschak
发明人： Gerald Oberschmidt , Veselin Brankovic , Dragan Krupezevic , Masayoshi Abe , Thomas Dölle , Tino Konschak
IPC分类号： H04B106
CPC分类号： H03D3/00
摘要： A RF receiver for modulated RF signals based on a N-port junction (1) providing LO/RF isolation is proposed. N thereby is an integer larger than two, such that the N-port junction (1) can be preferably a three port, four port, five port and six port junction. The N-port junction (1) supplied with a first RF signal at a first input (2) and with a second RF signal originating from a local oscillator (2) at a second input (3). An isolation block (13) comprising an active circuitry (22) is comprised in the N-port junction for isolating the second input (3) from the first input (1). Thereby can be ensured that the LO signals are significantly attenuated at the RF port (2).
摘要翻译： 提出了一种基于提供LO / RF隔离的N端口结（1）的调制RF信号的RF接收器。 N因此是大于2的整数，使得N端口结（1）可以优选为三端口，四端口，五端口和六端口结。 N端口结（1）在第一输入（2）处提供有第一RF信号，并在第二输入（3）处提供源自本地振荡器（2）的第二RF信号。 包括有源电路（22）的隔离块（13）包括在N端口结中，用于将第二输入（3）与第一输入（1）隔离。 从而可以确保LO信号在RF端口（2）处被显着衰减。
-
公开(公告)号：US06803814B1
公开(公告)日：2004-10-12
申请号：US09502656
申请日：2000-02-11
申请人： Dragan Krupezevic , Veselin Brankovic , Gerald Oberschmidt , Masayoshi Abe , Tino Konschak , Thomas Dölle
发明人： Dragan Krupezevic , Veselin Brankovic , Gerald Oberschmidt , Masayoshi Abe , Tino Konschak , Thomas Dölle
IPC分类号： H03D300
摘要： A demodulator for modulated RF signals comprises a passive four port structure (1). The four port structure (1) has a first input (3) for supplying a modulated RF signal to be demodulated. A second input (2) is supplied with a RF signal from a local oscillator (21). Two output terminals are connected to power sensors (4, 5). The RF signal from the local oscillator (21) is supplied to the second input (3) of the four port structure (1) without being RF switched by an RF switch. The demodulator is particularly useful for modulation schemes with a finite number of magnitude states (nQAM modulation).
摘要翻译： 用于调制RF信号的解调器包括无源四端口结构（1）。 四端口结构（1）具有用于提供待解调的调制RF信号的第一输入端（3）。 第二输入（2）被提供有来自本地振荡器（21）的RF信号。 两个输出端子连接到功率传感器（4,5）。 来自本地振荡器（21）的RF信号被提供给四端口结构（1）的第二输入端（3），而不用RF开关进行RF切换。 解调器对于具有有限数量级的状态（nQAM调制）的调制方案特别有用。
-
公开(公告)号：US06748203B1
公开(公告)日：2004-06-08
申请号：US09672643
申请日：2000-09-28
申请人： Veselin Brankovic , Dragan Krupezevic , Gerald Oberschmidt , Tino Konschak , Thomas Dölle , Hamid Amir-Alikhani , Masayoshi Abe
发明人： Veselin Brankovic , Dragan Krupezevic , Gerald Oberschmidt , Tino Konschak , Thomas Dölle , Hamid Amir-Alikhani , Masayoshi Abe
IPC分类号： H04B106
摘要： A three port structure for the down conversion demodulation of a digitally modulated RF signal is proposed, wherein no RF switches are provided. The three port structure (1) has a first input (2) for the RF signal to be down converted and a second input (3) for a RF signal originating from a local oscillator (8). An output (4) of the three port structure (1) is supplied to a power sensor unit (5). The RF signal from the local oscillator (8) is modulated (7) before it is supplied to the three port structure (1).
摘要翻译： 提出了一种用于数字调制RF信号的下变频解调的三端口结构，其中不提供RF开关。 三端口结构（1）具有用于RF信号被降频转换的第一输入端（2）和用于源自本地振荡器（8）的RF信号的第二输入端（3）。 三端口结构（1）的输出（4）被提供给功率传感器单元（5）。 来自本地振荡器（8）的RF信号在被提供给三端口结构（1）之前被调制（7）。
-
公开(公告)号：US06539215B1
公开(公告)日：2003-03-25
申请号：US09578755
申请日：2000-05-25
IPC分类号： H04B126
CPC分类号： H04L27/2331 , H03D3/007 , H03D9/04 , H04B1/30
摘要： A down converter for RF signals comprises one three port junction (7) having one input port six for modulated digital RF signals and two output ports (8, 9). The output ports (8, 9) are respectively connected to a power sensor (10, 11). The three port junction (7) comprises a power splitter (16) dividing the signal supply to the input terminal (6) of the two branches, processing means (17, 18, 19, 21, 22, 23, 24) for processing one of the branches and a four port junction device (20) for combining the two branches and for generating two output signals to be supplied to the output terminals (8, 9) of the three port junction (7). The processing means can comprise a delay unit (18) or alternatively a frequency divider (21), a plurality of filters (22, 24) and a frequency multiplicator (23).
摘要翻译： 用于RF信号的下变频器包括一个三端口结（7），其具有用于调制的数字RF信号的一个输入端口6和两个输出端口（8,9）。 输出端口（8,9）分别连接到功率传感器（10,11）。 三端口（7）包括功率分配器（16），将信号源分配给两个分支的输入端（6），处理装置（17,18,19,21,22,23,24）用于处理一个 和用于组合两个分支并用于产生要提供给三端口（7）的输出端子（8,9）的两个输出信号的四端口连接装置（20）。 处理装置可以包括延迟单元（18）或可替代地分频器（21），多个滤波器（22,24）和频率倍增器（23）。
-
公开(公告)号：US06507733B1
公开(公告)日：2003-01-14
申请号：US09461794
申请日：1999-12-15
IPC分类号： H04B126
摘要： The present invention proposes a direct receiver technique based on one power measurement and time multiplexing of input signals. The proposed technique allows I/Q demodulation. The proposed technique bases on the passive linear three-port high frequency circuitry (1) having two RF signal input (2, 5) and one output port (3) attached to a power sensor (4). The signals output from the power sensor (4) is low pass filtered (17) and supplied to a DC interface. The proposed linear three-port circuitry (1) contains at least one RF switch and at least one passive circuit having at least one phase shifter functionality.
摘要翻译： 本发明提出了基于一个功率测量和输入信号的时间复用的直接接收机技术。 所提出的技术允许I / Q解调。 所提出的技术基于具有连接到功率传感器（4）的两个RF信号输入（2,5）和一个输出端口（3）的无源线性三端口高频电路（1）。 从功率传感器（4）输出的信号被低通滤波（17）并提供给DC接口。 所提出的线性三端口电路（1）包含至少一个RF开关和至少一个具有至少一个移相器功能的无源电路。
-
公开(公告)号：US06724246B2
公开(公告)日：2004-04-20
申请号：US09767124
申请日：2001-01-22
IPC分类号： H03D700
CPC分类号： H03D3/009
摘要： The present invention relates to a demodulation structure and method for downconverting and demodulating a digitally modulated signal So, with a local oscillator means (1; 5; 8) for providing a local oscillator signal Slo a mixer means (2) for mixing said local oscillator signal Slo and said digitally modulated signal S0 in order to obtain a mixed signal, a lowpass filter means (3) for lowpass filtering the mixed signal from the mixer means (2) and an analog-to-digital converting means (4) for converting the filtered signal from the lowpass filter means (3) into a downconverted and demodulated digital signal Sl, whereby the local oscillator signal is set in respect to the modulated digital signal so that the downconverted and demodulated digital signal output from the analog-to-digital converting means comprises to serially arranged information parts. The present demodulation structure provides a very simple structure with improved amplitude and phase imbalances.
摘要翻译： 本发明涉及一种用于通过本地振荡器装置（1; 5; 8）对数字调制信号So进行下变频和解调的解调结构和方法，该本地振荡器装置用于提供本地振荡器信号Slo，混频器装置（2）用于混合所述本地振荡器 信号Slo和所述数字调制信号S0以获得混合信号;低通滤波器装置（3），用于对来自混频器装置（2）的混合信号进行低通滤波;以及模数转换装置（4），用于转换 从低通滤波器装置（3）滤波的信号变为下变频和解调的数字信号S1，由此相对于调制的数字信号设置本地振荡器信号，使得从模数转换器输出的下变频和解调的数字信号 转换装置包括串行排列的信息部分。 本解调结构提供了具有改善的幅度和相位不平衡的非常简单的结构。
-
公开(公告)号：US06650178B1
公开(公告)日：2003-11-18
申请号：US09367520
申请日：1999-10-27
IPC分类号： H03D904
CPC分类号： H03D9/04 , H03D2200/0003 , H04B1/30 , H04L27/3827
摘要： The present invention relates to n-port junction devices for processing modulated digital RF signals, n being an integer larger than 3, the n-port junction device comprising two RF input ports (4, 5), two passive signal-combining means (2, 3) connected to each other wherein respectively one of the passive signal-combining means (2, 3) is connected to one of the RF inputs (4, 5), and at least two power sensors (P1, P2) wherein each of the passive signal-combining means (2, 3) has at least an output port (6, 7) and each output port (6, 7) is connected to a power sensor (P1, P2). The two passive signal-combining means (2, 3) are connected with each other by means of a phase shifting element (10).
摘要翻译： 本发明涉及用于处理调制数字RF信号的n端口结器件，n是大于3的整数，n端口结器件包括两个RF输入端口（4,5），两个无源信号组合装置（2） ，3）彼此连接，其中无源信号组合装置（2,3）中的一个被连接到RF输入（4,5）中的一个，以及至少两个功率传感器（P1，P2），其中每个 无源信号组合装置（2,3）至少具有一个输出端口（6,7），并且每个输出端口（6,7）连接到功率传感器（P1，P2）。 两个无源信号组合装置（2,3）通过相移元件（10）相互连接。
-
公开(公告)号：US06609010B1
公开(公告)日：2003-08-19
申请号：US09439411
申请日：1999-11-11
IPC分类号： H04B138
CPC分类号： H04B1/005 , H04B1/0096 , H04B1/406
摘要： A dual frequency band transceiver (10) is provided adapted to be operated into different transmission frequency bands. A control unit (8) controls a switching (6) between a first transmission frequency band FC1 and a second transmission frequency band FC2, wherein the control unit (8) changes correspondingly and simultaneously to the switching (6) in the first transmission frequency band FC1 and the second transmission frequency band FC2 between a first and a second channel bandwidth. The first and the second channel bandwidth satisfies the following equation: n*BC1=m*BC2, wherein BC1 and BC2 are the first and the second channel bandwidth, respectively, and n and m are an integer values starting with 1.
摘要翻译： 提供了适用于不同传输频带的双频带收发器（10）。 控制单元（8）控制第一发送频带FC1和第二发送频带FC2之间的切换（6），其中控制单元（8）相应地同时改变到第一发送频带中的切换（6） FC1和第一和第二信道带宽之间的第二传输频带FC2。第一和第二信道带宽满足以下等式：其中BC1和BC2分别是第一和第二信道带宽，并且n和m是 整数值以1开头。
-
公开(公告)号：US20060284652A1
公开(公告)日：2006-12-21
申请号：US10493241
申请日：2001-10-31
IPC分类号： H03K9/06
CPC分类号： H03D1/18
摘要： A high performance power detection circuit suitable to be made monolithic, being compact and low at cost, suitable to a radio-frequency operation in a wide band, having excellent linearity in detection characteristics, small fluctuation of detection characteristics against bias fluctuation, small fluctuation of detection characteristics against FET threshold voltage fluctuation and a small DC offset, which does not require an additional circuit even when a subsequent circuit has a balanced input; and a demodulator using the same. The power detection circuit uses two transistors (FET) Q101 and Q102 having approximately same characteristics, wherein a connection point of sources are connected to a resistor element R103 as a current source, are used as active elements; gates and drains of the transistors Q101 and Q102 are supplied with approximately same bias voltages; drains of them are supplied with approximately same drain bias voltages; a capacitor C104, wherein a capacitance value is set to be a sufficiently large value, is connected between sources of transistors Q101 and Q102 and a ground; capacitors C102 and C103, wherein capacitance values are approximately same and set to be sufficiently large values, are connected between drains of the transistors Q101 and Q102 and a ground; a radio-frequency signal RFin is supplied to a gate of the transistor Q101; and a voltage difference between a drain of the transistor Q101 and a drain of the transistor Q102 is regarded as a detection output.
摘要翻译： 高性能功率检测电路适用于单片，小巧，成本低，适用于宽带的射频工作，检测特性线性好，检测特性与偏置波动的波动小，波动小 即使在后续电路具有平衡输入的情况下也不需要额外的电路; 以及使用该解调器的解调器。 功率检测电路使用具有大致相同特性的两个晶体管（FET）Q 101和Q 102，其中源极的连接点连接到作为电流源的电阻器元件R 103用作有源元件; 晶体管Q 101和Q 102的栅极和漏极被提供有大致相同的偏置电压; 它们的漏极具有大致相同的漏极偏置电压; 将电容值设定为足够大的电容器C 104连接在晶体管Q 101和Q 102的源极与地之间; 电容器C 102和C 103，其中电容值大致相同且设置为足够大的值，连接在晶体管Q 101和Q 102的漏极与地之间; 射频信号RFin被提供给晶体管Q 101的栅极; 将晶体管Q101的漏极与晶体管Q102的漏极之间的电压差作为检测输出。
-
10.发明授权I/Q demodulator device with three power detectors and two A/D converters 失效I / Q解调器具有三个功率检测器和两个A / D转换器公开(公告)号：US06999528B2
公开(公告)日：2006-02-14
申请号：US09947145
申请日：2001-09-05
CPC分类号： H03D1/2245 , H03D3/007 , H03D9/04 , H04B1/30
摘要： The present invention relates to a method and a device for the I/Q demodulation of modulated RF signals. The I/Q demodulator (60) has a first input for the RF signal (61) to be demodulated and a second input for a RF signal (62) originating from a local oscillator (20). The demodulator (60) combines the two RF signals (61,62) to generate three output signals supplied to three power detectors. In a combination unit (70) the three power signals of the power detectors are merged in two signal branches wherein after passing an A/D converting (72) and digital processing unit (73) one signal is the I component and the other one is the Q component of the received modulated RF signal (61).
摘要翻译： 本发明涉及用于调制RF信号的I / Q解调的方法和装置。 I / Q解调器（60）具有要被解调的RF信号（61）的第一输入和源自本地振荡器（20）的RF信号（62）的第二输入。 解调器（60）组合两个RF信号（61,62）以产生提供给三个功率检测器的三个输出信号。 在组合单元（70）中，功率检测器的三个功率信号被合并在两个信号分支中，其中在通过A / D转换（72）和数字处理单元（73）之后，一个信号是I分量，另一个是 所接收的调制RF信号（61）的Q分量。
-
-
-
-
-
-
-
-
-
搜索结果
28 条记录 (耗时 0.027 秒)