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公开(公告)号：JPH10242882A
公开(公告)日：1998-09-11
申请号：JP5293998
申请日：1998-02-18
Applicant: MOTOROLA INC
Inventor： VLAHOS CONSTANTINE , PECKHAM DAVID SUTHERLAND , SKUTTA FRANK ROBERT
Abstract: PROBLEM TO BE SOLVED: To operate a communication equipment for a plurality of frequency bands such as GSM 900MHz and DCS 1800MHz or the like by eliminating the need for a mixer for each frequency band. SOLUTION: In a radio telephone set of dual band GSM/DCS 1800, a frequency injected to a local oscillator 228 for both bands is given from synthesizer filters 222, 422 to a mixer 234. Thus, a duplex and matching condition to a mixer input is simplified and a signal loss is minimized. A common output port of a GSM RX/LO synthesizer filter and a DCS RX/LO synthesizer filter is duplexed to the mixer input. Moreover, In the input impedance matching to the mixer 234, impedance matches a reception signal at each band and RF is trapped at an intermediate frequency. In an output matching of the mixer 234, it is designed that the impedance of the IF filter matches and a low impedance is provided to an RF input frequency.
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公开(公告)号：GB2344236A
公开(公告)日：2000-05-31
申请号：GB9926092
申请日：1999-11-03
Applicant: MOTOROLA INC
Inventor： HUFFORD CURT , SKUTTA FRANK ROBERT
Abstract: In a mobile phone, separate mixer transistors 313 and 324 are provided for the GSM and DCS bands (900 MHz and 1.8 GHz). A single local oscillator, which may be controlled to provide an output at 1.3GHz or 1.4GHz, provides a signal to the emitter of each mixer transistor. The communication signals are applied to the respective base terminals, and the collector terminals are coupled to a common IF filter 206. Filter 203 in the emitter circuit provides a low impedance to the RF and IF frequencies. Alternatively (figure 4), the GSM and DCS signals may be combined in a diplexer arrangement (402,404) and fed to a single mixer transistor (400). MOSFETs or FETs may be used instead of bipolar transistors.
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公开(公告)号：MX9801327A
公开(公告)日：1998-08-30
申请号：MX9801327
申请日：1998-02-18
Applicant: MOTOROLA INC
Inventor： VLAHOS CONSTANTINE , PECKHAM DAVID SUTHERLAND , SKUTTA FRANK ROBERT
Abstract: Un método y aparato permiten que un dispositivo de comunicacion (100) opere en multiples bandas, tal como bandas de GSM de 900 MHz, y DC8 de 1800 MHz, y DCs de 1900 MHz, al eliminar la necesidad de un mezclador para cada banda. En un radioteléfono de GSM/DCS 1800 de doble banda, por ejemplo, las frecuencias de inyeccion del oscilador local (LO) para ambas bandas de GSM y de DCS se proporcionan a un mezclador (234) a través del uso de filtros de combinacion (222, 246). De esta manera, los requerimientos de transmision en duplex y acoplamiento de la entrada del mezclador se simplifican y las pérdidas de señal se minimizan. Los puertos de salida comun del filtro de combinacion de RX/LO de GSM y el filtro de combinacion de RX/LO de DCS se transmiten en duplex a la entrada del mezclador. También, el acoplamiento de impedancia de entrada del mezclador se diseña para acoplar la impedancia para las señales recibidas en cada banda, así como para proporcionar un desvío de RF en la frecuencia de IF. El acoplamiento en la salida del mezclador se diseña para acoplar la impedancia del filtro de IF y proporciona una impedancia baja a las frecuencias de entrada de RF. Finalmente, también se describe un radioteléfono de triple banda.
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公开(公告)号：DE19806096A1
公开(公告)日：1998-08-27
申请号：DE19806096
申请日：1998-02-14
Applicant: MOTOROLA INC
Inventor： VLAHOS CONSTANTINE , PECKHAM DAVID SUTHERLAND , SKUTTA FRANK ROBERT
IPC: H04B1/40 , H03D7/12 , H03J1/00 , H04B1/26 , H04B1/44 , H04Q7/20 , H04Q7/32 , H04B7/005 , H04B1/18 , G08C17/02 , G06F15/00
Abstract: A method and apparatus enables a communication device (100) to operate in multiple bands, such as GSM 900 MHz, DCS 1800 MHz, and DCS 1900 MHz bands, by eliminating the need for a mixer for each band. In a dual band GSM/DCS 1800 radiotelephone, for example, the local oscillator (LO) injection frequencies for both GSM and DCS bands are provided to a mixer (234) through the use of combination filters (222, 246). Thus, the duplexing and matching requirements to the mixer input are simplified and the signal losses are minimized. The common output ports of the GSM RX/LO combination filter and DCS RX/LO combination filter are duplexed to the input of the mixer. Also, the input impedance matching of the mixer is designed to match the impedance for the received signals in each band, as well as provide an RF trap at the IF frequency. The match at the output of the mixer is designed to match the impedance of the IF filter and provides a low impedance to RF input frequencies. Finally, a tri-band radiotelephone is also described.
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公开(公告)号：GB2322491A
公开(公告)日：1998-08-26
申请号：GB9801264
申请日：1998-01-21
Applicant: MOTOROLA INC
Inventor： VLAHOS CONSTANTINE , PECKHAM DAVID SUTHERLAND , SKUTTA FRANK ROBERT
Abstract: A method and apparatus enables a communication device Fig 1 to operate in multiple bands, such as GSM 900 MHz, DCS 1800 MHz, and PCS 1900 MHz bands, by eliminating the need for a mixer for each band. In a dual band GSM/DCS 1800 radiotelephone, for example, the local oscillator (LO) injection frequencies for both GSM and DCS bands are provided to a mixer (234) through the use of combination filters(222, 246). Thus, the duplexing and matching requirements to the mixer input are simplified and the signal losses are minimized. The common output ports of the GSM RX/LO combination filter and DCS RX/LO combination filter are duplexed to the input of the mixer. Also, the input impedance matching of the mixer is designed to match the impedance for the received signals in each band, as well as provide an RF trap at the IF frequency. The match at the output of the mixer is designed to match the impedance of the IF filter and provides a low impedance to RF input frequencies. Finally, a tri-band radiotelephone is also described.
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Patent Agency Ranking
公开(公告)号：GB2344236B
公开(公告)日：2001-05-30
申请号：GB9926092
申请日：1999-11-03
Applicant: MOTOROLA INC
Inventor： HUFFORD CURT , SKUTTA FRANK ROBERT
Abstract: A multiple band mixer (204) includes at least one transistor element (313, 324, 400). A single local oscillator provides a signal to one terminal of the at least one transistor element. The communication signals for each frequency band is input to the at least one transistor element at another terminal. A third terminal of the at least one transistor element is connected to the output.
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公开(公告)号：GB2322491B
公开(公告)日：2000-03-22
申请号：GB9801264
申请日：1998-01-21
Applicant: MOTOROLA INC
Inventor： VLAHOS CONSTANTINE , PECKHAM DAVID SUTHERLAND , SKUTTA FRANK ROBERT
Abstract: A method and apparatus enables a communication device (100) to operate in multiple bands, such as GSM 900 MHz, DCS 1800 MHz, and DCS 1900 MHz bands, by eliminating the need for a mixer for each band. In a dual band GSM/DCS 1800 radiotelephone, for example, the local oscillator (LO) injection frequencies for both GSM and DCS bands are provided to a mixer (234) through the use of combination filters (222, 246). Thus, the duplexing and matching requirements to the mixer input are simplified and the signal losses are minimized. The common output ports of the GSM RX/LO combination filter and DCS RX/LO combination filter are duplexed to the input of the mixer. Also, the input impedance matching of the mixer is designed to match the impedance for the received signals in each band, as well as provide an RF trap at the IF frequency. The match at the output of the mixer is designed to match the impedance of the IF filter and provides a low impedance to RF input frequencies. Finally, a tri-band radiotelephone is also described.
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公开(公告)号：FR2759827A1
公开(公告)日：1998-08-21
申请号：FR9801198
申请日：1998-02-03
Applicant: MOTOROLA INC
Inventor： VLAHOS CONSTANTINIE , PECKHAM DAVID S , SKUTTA FRANK ROBERT
Abstract: A method and apparatus enables a communication device (100) to operate in multiple bands, such as GSM 900 MHz, DCS 1800 MHz, and DCS 1900 MHz bands, by eliminating the need for a mixer for each band. In a dual band GSM/DCS 1800 radiotelephone, for example, the local oscillator (LO) injection frequencies for both GSM and DCS bands are provided to a mixer (234) through the use of combination filters (222, 246). Thus, the duplexing and matching requirements to the mixer input are simplified and the signal losses are minimized. The common output ports of the GSM RX/LO combination filter and DCS RX/LO combination filter are duplexed to the input of the mixer. Also, the input impedance matching of the mixer is designed to match the impedance for the received signals in each band, as well as provide an RF trap at the IF frequency. The match at the output of the mixer is designed to match the impedance of the IF filter and provides a low impedance to RF input frequencies. Finally, a tri-band radiotelephone is also described.
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公开(公告)号：BR9603664A
公开(公告)日：1998-05-19
申请号：BR9603664
申请日：1996-09-06
Applicant: MOTOROLA INC
Inventor： SKUTTA FRANK ROBERT , BEUTLER SCOTT DAVID , CRUZ MICHAEL STEVEN
Abstract: A unique apparatus for coupling radio frequency (RF) signals from a wireless communication device (200) to an external device by way of an I/O port (116). In particular, a connector having three adjacent contact elements (238) couples signals to an external device wherein the first and third contact elements (239, 241) are electrically coupled to a ground plane (302) and wherein the second or middle contact element (240) is electrically coupled to a conductive RF signal path (344). The ground plane and the conductive path (334) are preferably on a printed circuit (pc) board which is preferably a three layer board with the conductive path (334) located between two ground planes (302, 352). The connector is substantially covered with a shield (230) coupled by legs (248) to the ground plane (302) at apertures (332). A mating connector (400) also includes a shield (430) which is commonly grounded. The mating connector preferably includes an internally located coaxial connector (412) and cable (414) to minimize loss of RF communication signals. Components of the connectors (116, 400) are selectively grounded to eliminate RF interference and establish a reliable RF ground reference to a pc board (300) of the wireless communication device and the coaxial connector. The connectors also include latching members (405) and apertures (250) for firm coupling therebetween.
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公开(公告)号：CA2183716C
公开(公告)日：2001-01-02
申请号：CA2183716
申请日：1996-08-20
Applicant: MOTOROLA INC
Inventor： BEUTLER SCOTT DAVID , CRUZ MICHAEL STEVEN , SKUTTA FRANK ROBERT
IPC: H01Q1/24 , H01R12/50 , H01R13/648 , H01R24/40 , H04M1/02 , H04M1/215 , H04Q7/32 , H01R13/658
Abstract: A unique method and apparatus for coupling radio frequency signals from a wireless communication device (200) to an external device by way of an I/O port (116). In particular, a connector having three adjacent conductive elements (238) couples signals to an external device wherein the first and third conductive elements (239, 241) are electrically coupled to a ground plane (302) and wherein the second conductive element (240) is electrically coupled to a conductive path (344). The connector is substantially covered with a shield (230) coupled to the ground plane. A mating connector (400) also includes a shield (430) which is commonly grounded. The mating connector preferably includes an internally located coaxial connector (412) and cable (414) to minimize loss of RF communication signals. Component of the connectors (116, 400) are selectively grounded to eliminate RF interference and establish a reliable RF ground reference to a pc board of the wireless communication device and the coaxial connector.
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