公开(公告)号：EP1524777A3

公开(公告)日：2005-09-21

申请号：EP04078191.6

申请日：1998-02-20

申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ)

发明人： Gärdenfors, Karl Hakan Torbjörn ,  Mattisson, Sven Erik ,  Haartsen, Jacobus Cornelis

IPC分类号： H04B1/40

CPC分类号： H04B1/44 ,  H04B1/3833 ,  H04B1/408 ,  H04B1/715 ,  H04B15/00 ,  H04B2001/7152 ,  H04J3/10 ,  H04L5/1461 ,  H04L27/122

摘要： A radio for receiving and transmitting high frequency signals. The radio comprises a down-conversion section (206, 208) arranged to down-convert a received first high frequency signal to an intermediate frequency signal; an up-conversion section arranged to up-convert an information signal, to be transmitted, to a second high frequency signal; a filter (220) for filtering the intermediate frequency signal; a detector (224) for information recovery; a variable voltage controlled oscillator (218) connected to the up-conversion section and the down-conversion section for down-converting said first high frequency signal during a receive cycle and up-converting said information signal during a transmit cycle in a time division duplex mode. The up-conversion section, the down-conversion section, and the variable controlled oscillator are integrated on a single IC chip. Also, the variable controlled oscillator is modulated by the information signal during the transmit cycle.

公开(公告)号：EP1445872A2

公开(公告)日：2004-08-11

申请号：EP04002454.9

申请日：2004-02-04

申请人： HITACHI METALS, LTD.

发明人： Yamashita, Takahiro ,  Fukamachi, Keisuke ,  Kemmochi, Shigeru

IPC分类号： H04B1/40

CPC分类号： H04B1/0057 ,  H04B1/006 ,  H04B1/406 ,  H04B1/44 ,  H04B1/52

摘要： An antenna switch module connected to a common antenna for switching the connection of the antenna to a transmission circuit or a receiving circuit in plural transmitting/receiving systems having different passbands, comprising a diplexer circuit comprising a low-pass filter and a high-pass filter; a first switch circuit connected to the low-pass filter and for switching a transmitting path and a receiving path, a second switch circuit connected to the high-pass filter for switching a transmitting path and a receiving path; a third switch circuit connected to the first switch circuit for switching the receiving path from the first switch circuit; and a fourth switch circuit connected to the second switch circuit for switching the receiving path from the second switch circuit; at least part of transmission lines constituting LC circuits in the diplexer circuit and the first and second switch circuits being electrode patterns formed in a multilayer substrate constituted by plural dielectric layers; and chip elements constituting part of the LC circuits, diode elements constituting the first and second switch circuits, and semiconductor elements constituting the third and fourth switch circuits being mounted onto the multilayer substrate.

摘要翻译： 一种天线开关模块，连接到公共天线，用于在具有不同通带的多个发送/接收系统中将天线的连接切换到发送电路或接收电路，该天线开关模块包括双工器电路，该双工器电路包括低通滤波器和高通滤波器 ; 第一开关电路，连接到所述低通滤波器并用于切换发送路径和接收路径;第二切换电路，连接到所述高通滤波器，用于切换发送路径和接收路径; 第三开关电路，连接到第一开关电路，用于切换来自第一开关电路的接收路径; 以及第四开关电路，连接到第二开关电路，用于从第二开关电路切换接收路径; 至少一部分传输线路构成双工器电路中的LC电路，第一和第二开关电路是形成在由多个介质层构成的多层基板中的电极图案; 以及构成LC电路的一部分的芯片元件，构成第一和第二开关电路的二极管元件以及构成第三和第四开关电路的半导体元件安装到多层基板上。

公开(公告)号：EP1386409A1

公开(公告)日：2004-02-04

申请号：EP02712580.6

申请日：2002-02-19

申请人： Telefonaktiebolaget L M Ericsson (Publ)

发明人： WEINHOLT, Dan, Rutger ,  SKATT, Gunnar

IPC分类号： H04B1/54

CPC分类号： H03D7/1408 ,  H04B1/44

摘要： The present invention use the properties of a TDD-transmission on a general mixer in such a manner that in the transmit mode a first RF signal is amplified in the mixer with an amplification factor greater than, or equal to, or less than one, and in the receive mode the received RF signal is mixed with a second RF signal.

公开(公告)号：EP1381167A2

公开(公告)日：2004-01-14

申请号：EP03253835.7

申请日：2003-06-18

申请人： ALPS ELECTRIC CO., LTD.

发明人： Izumiyama, Toru

IPC分类号： H04B1/44

CPC分类号： H04B1/44

摘要： A transmission-and-receiving switching circuit includes a signal input-and-output end (2) to which an antenna (A) is connected; a transmission circuit (4) connected to the signal input-and-output end through a first switching diode (1a); a receiving circuit (6) connected to the signal input-and-output end through a second switching diode (1b); and inductor elements (9, 14) for feeding bias voltages to the first switching diode and the second switching diode. A first capacitor element (16) is provided which constitutes a first resonant circuit for at least series resonating between the first switching diode and the ground together with the inductor elements for feeding the first switching diode. The series resonant frequency of the first resonant circuit is set almost equal to the frequency of a signal other than the transmission signal output from the transmission circuit.

摘要翻译： 发送和接收切换电路包括天线（A）连接到的信号输入和输出端（2）; 通过第一开关二极管（1a）连接到信号输入和输出端的发送电路（4）; 通过第二开关二极管（1b）连接到信号输入和输出端的接收电路（6）; 以及用于将偏置电压馈送到第一开关二极管和第二开关二极管的电感器元件（9,14）。 提供了第一电容器元件（16），其构成用于在第一开关二极管和地之间至少串联谐振的第一谐振电路以及用于馈送第一开关二极管的电感器元件。 第一谐振电路的串联谐振频率被设定为几乎等于从发送电路输出的发送信号以外的信号的频率。

公开(公告)号：EP0625831B1

公开(公告)日：2003-08-06

申请号：EP94401126.1

申请日：1994-05-20

申请人： SONY CORPORATION

发明人： Kohama, Kazumasa

IPC分类号： H04B1/44 ,  H03K17/693

CPC分类号： H03K17/693 ,  H04B1/44

公开(公告)号：EP1247305A1

公开(公告)日：2002-10-09

申请号：EP01901997.5

申请日：2001-01-11

申请人： Honeywell International Inc.

发明人： MCKITTERICK, John, Burt

IPC分类号： H01P1/205

CPC分类号： H04B1/44

摘要： A microwave isolator including a driving circuit and a receiving circuit, wherein the driving circuit receives an input signal from a first isolated circuit and generates a corresponding radio frequency (RF) signal and the receiving circuit detects and decodes the corresponding RF signal and provides a corresponding output signal to a second isolated circuit. The driving circuit contains an oscillator (110) for generating the corresponding RF signal based on the input signal from the first isolated circuit, a transmitting antenna (310) for transmitting the corresponding RF signal, and a microwave switch (120) interposed between the oscillation means and the transmitting antenna for switching the RF signal to the antenna. The receiving circuit contains a receiving antenna (320) to receive the corresponding RF signal and means (210, 220, 230, 240) for detecting and decoding the received corresponding RF signal and providing the corresponding output signal to the second isolated circuit.

公开(公告)号：EP1240719A1

公开(公告)日：2002-09-18

申请号：EP00985588.3

申请日：2000-12-15

申请人： Davies Industrial Communications Limited

发明人： DAVIES, John

IPC分类号： H04B1/38 ,  H04B1/44

CPC分类号： H04B1/3827 ,  H04B1/088 ,  H04B1/406 ,  H04B1/44

摘要： A radio system comprises a radio (1) having a transmit mode activated by a press to talk (PTT) switch (16) mounted on a universal communication interface (12) for mounting on a radio interface (6) associated with the radio (1). The radio interface (6) may or may not form part of the radio (1) and a plurality of radio interfaces may be provided for different applications, such that a standard universal communication interface (12) can be used with different types of equipment.

公开(公告)号：EP0751631B1

公开(公告)日：2002-08-28

申请号：EP96110241.5

申请日：1996-06-25

申请人： NTT MOBILE COMMUNICATIONS NETWORK INC.

发明人： Tarusawa, Yoshiaki ,  Nojima, Toshio

IPC分类号： H04B7/04 ,  H04B1/44

CPC分类号： H04B1/44 ,  H04B1/48 ,  H04B7/0802

公开(公告)号：EP1232574A1

公开(公告)日：2002-08-21

申请号：EP01974936.5

申请日：2001-10-05

申请人： SAMSUNG ELECTRONICS CO LTD.

发明人： LEE, Hyun-Woo ,  KWAK, Byung-Jae ,  KIM, Sung-Jin ,  LEE, Ju-Ho ,  LEE, Young-Suk ,  LEE, Jong-Hyeuk

IPC分类号： H04B1/56

CPC分类号： H04W52/228 ,  H04B1/44 ,  H04B1/54 ,  H04B7/0604 ,  H04B7/061 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0673 ,  H04J13/00 ,  H04W52/143 ,  H04W52/42

摘要： Disclosed a transmission apparatus in a CDMA mobile communication system. Transmission frames each have a plurality of time slots, and each of the time slots includes two data parts having the same length, a midamble intervening between the data parts, and a guard period for dividing the consecutive time slots. The transmission apparatus modulates the frames into a radio signal with a modulation signal and transmits the modulated radio signal using a plurality of antennas. A power amplifier amplifies the radio signal. A controller generates a switching control signal in a guard period of time slots of a frame associated with the radio signal amplified by the power amplifier. A switch switches the amplified radio signal from the power amplifier between a first and a second antenna in response to the switching control signal.

公开(公告)号：EP0720793B1

公开(公告)日：2002-08-07

申请号：EP94927673.7

申请日：1994-09-22

申请人： Nokia Corporation

发明人： MÄKINEN, Jarmo

IPC分类号： H04B1/40 ,  H04B7/155

CPC分类号： H04B1/54 ,  H04B1/30 ,  H04B1/44

摘要： The invention relates to a digital radio link and radio link system comprising two radio link terminals (A, B) establishing a fixed radio connection between them. In the system, the radio link terminals transmit alternately at the same radio frequency, each one of the radio link terminals (A, B) comprising (a) baseband modulator means (12a; 12b) in the transmitting branch for generating baseband modulation signals from a digital data stream (TXD); (b) demodulator means in the receiving branch for generating a base-band data stream (RXD) by demodulating baseband signals to be received; (c) means (22, 24) for forming an RF transmitting signal directly from said baseband modulation signals and for forming said baseband signals to be received directly from the RF signal to be received; and (d) timing means (16a; 16b) for connecting the radio link terminal alternately to a transmitting and receiving mode. To achieve a link and a link system that are economically advantageous and as simple as possible, the means comprise a single common quadrature mixer (22) and a local oscillator (24) controlling it, the transmitting and receiving branch being separated at the baseband.