公开(公告)号：DE68920547D1

公开(公告)日：1995-02-23

申请号：DE68920547

申请日：1989-10-23

Applicant: MOTOROLA INC

Inventor： SCHWENT DALE GERARD

IPC: H01P1/205 ,  H01P1/213 ,  H01P5/08 ,  H04B1/04

Abstract: An integral phase shifting network (215,216,217) of a transmitter filter (104) provides a means to reduce the size and increase the efficiency of an antenna coupling network. The network to shift the phase of the transmitter filter (104) is printed by depositing conductive material directly on a ceramic block (230) using low-loss circuit elements and can be tuned easily by removing conductive material if required in certain applications. By utilizing an integral phase shifting network (215,216,217), either transmit filter (104) or receive filter (112) having a highly reactive and capacitive out-of-band impedance in the receive or transmit band, respectively, can be connected to a common antenna port without external transmission lines.

公开(公告)号：AT117131T

公开(公告)日：1995-01-15

申请号：AT89119613

申请日：1989-10-23

Applicant: MOTOROLA INC

Inventor： SCHWENT DALE GERARD

IPC: H01P1/205 ,  H01P1/213 ,  H01P5/08 ,  H04B1/04

Abstract: An integral phase shifting network (215,216,217) of a transmitter filter (104) provides a means to reduce the size and increase the efficiency of an antenna coupling network. The network to shift the phase of the transmitter filter (104) is printed by depositing conductive material directly on a ceramic block (230) using low-loss circuit elements and can be tuned easily by removing conductive material if required in certain applications. By utilizing an integral phase shifting network (215,216,217), either transmit filter (104) or receive filter (112) having a highly reactive and capacitive out-of-band impedance in the receive or transmit band, respectively, can be connected to a common antenna port without external transmission lines.

公开(公告)号：GB2331419B

公开(公告)日：2002-09-04

申请号：GB9822197

申请日：1998-10-13

Applicant: MOTOROLA INC

Inventor： SCHWENT DALE GERARD ,  NEUZIL CLINT HOWARD

IPC: H04B1/40 ,  H03F3/193 ,  H03F3/45 ,  H04B1/50 ,  H04B1/52 ,  H04B7/212 ,  H04B7/26 ,  H04B17/00 ,  H03F1/32

Abstract: An off-channel leakage power monitor implemented in a transceiver (100) dynamically measures adjacent and alternate channel leakage power produced by nonlinearities in a transmitter (110) power amplifier (116). A main local oscillator (124), offset voltage-controlled oscillator (122), and second local oscillator (170) are adjusted to obtain on-channel power, adjacent channel power, and alternate channel power measurements using a measurement calculator (185) implemented in a digital signal processor (180) or as a gate array in a receiver (140). Once the off-channel leakage power measurements have been obtained, any number of techniques can be used to extract increased efficiency from the power amplifier (116) while maintaining acceptable linearity under changing operating conditions.

公开(公告)号：GB2362051A8

公开(公告)日：2002-04-17

申请号：GB0031141

申请日：2000-12-20

Applicant: MOTOROLA INC

Inventor： SCHWENT DALE GERARD ,  KLOMSDORF ARMIN ,  WIKNELMANN LUKE E ,  GREENE MATHEW

IPC: H04B1/04 ,  H04B1/40 ,  H04J3/00 ,  H03F1/02

Abstract: A modulation format switch in signal communication with an amplifier, which produces a plurality of modulation format signals, and a load is described. The modulation format switch includes at least one matching network in signal communication with the amplifier and the load, where the at least one matching network capable of having a plurality of impedance values corresponding to the plurality of modulation format signals. The modulation format switch also includes a controllable element in the matching network, the controllable element capable of having more than one impedance value.

公开(公告)号：GB2362051A

公开(公告)日：2001-11-07

申请号：GB0031141

申请日：2000-12-20

Applicant: MOTOROLA INC

Inventor： SCHWENT DALE GERARD

IPC: H04B1/04 ,  H04B1/40 ,  H04J3/00 ,  H03F1/02

Abstract: A modulation format switch (20) in signal communication with an amplifier (55, 60), which produces a plurality of modulation format signals, and a load is described. The modulation format switch (20) includes at least one matching network (62, 100) in signal communication with the amplifier and the load, where the at least one matching network (62, 100) is capable of having a plurality of impedance values corresponding to the plurality of modulation format signals. The modulation format switch (20) includes at least one controllable element (70, 72, 74, 76 or 102) in the matching network (62, 100), the controllable element being capable of having more than one impedance value. Use in CDMA and TDMA telephone systems is described. Linearity and efficiency problems are addressed.

公开(公告)号：GB2359463A

公开(公告)日：2001-08-22

申请号：GB0022551

申请日：2000-09-14

Applicant: MOTOROLA INC

Inventor： CHAN YIU K ,  SCHWENT DALE GERARD ,  LANDHERR MICHAEL ,  KLOMSDORE ARMIN ,  HAND MICHAEL

IPC: H03H7/46 ,  H04B1/00 ,  H04B1/04 ,  H04B1/40

Abstract: A radio frequency (RF) coupler apparatus (312) suited for use in a multi-band wireless communication device (200), has a termination device (316) and couplers (314 and 315). Each of the couplers (314 and 315) has through-path coupling elements (318 and 320) and coupled-path coupling elements (319 and 321). Through-path coupling elements (318 and 320) pass a RF signal that is to be transmitted respective frequency bands (TX BAND 1, TX BAND 2) within which the device (200) operates. Coupled-path coupling elements (319 and 321) couple the RF signals passed by respective through-path coupling elements (318 and 320). The coupled-path coupling elements (319 and 321) and the termination device (316) are coupled in series, thereby permitting compatibility with a RF power detector (313) that uses a single detection diode (322).

公开(公告)号：IE67155B1

公开(公告)日：1996-03-06

申请号：IE270789

申请日：1989-08-23

Applicant: MOTOROLA INC

Inventor： SCHWENT DALE GERARD

IPC: H01P1/205 ,  H01P1/213 ,  H01P5/08 ,  H04B1/04

Abstract: An integral phase shifting network (215,216,217) of a transmitter filter (104) provides a means to reduce the size and increase the efficiency of an antenna coupling network. The network to shift the phase of the transmitter filter (104) is printed by depositing conductive material directly on a ceramic block (230) using low-loss circuit elements and can be tuned easily by removing conductive material if required in certain applications. By utilizing an integral phase shifting network (215,216,217), either transmit filter (104) or receive filter (112) having a highly reactive and capacitive out-of-band impedance in the receive or transmit band, respectively, can be connected to a common antenna port without external transmission lines.