-
公开(公告)号：JP2001111313A
公开(公告)日：2001-04-20
申请号：JP2000258449
申请日：2000-08-29
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MYER ROBERT EVAN
Abstract: PROBLEM TO BE SOLVED: To provide a high directional coupler. SOLUTION: This high directional coupler is provided with at least first and second directional couplers 120 and 122 which respectively generate a forward signal and a backward signal from a signal propagating through a transmission line 100. A connector 124 connects the forward signals by an addition system and the backward signals so that they can cancel each other.
-
公开(公告)号：JP2000114884A
公开(公告)日：2000-04-21
申请号：JP24452199
申请日：1999-08-31
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MYER ROBERT EVAN
IPC: H03F1/32
Abstract: PROBLEM TO BE SOLVED: To provide a system capable of reducing distortion without a pilot signal. SOLUTION: A feed forward distortion reducing step 64 receives a signal S to be amplified on a main signal route from a splitter 68 and copies it onto routes 72 and 74. The signal S on the route 72 is passed through a gain and phase circuit 75 and an amplifier 62 and becomes an amplified signal S having a distortion D caused by the amplifier 62. A part of these outputs S and D is arranged on a coupling route 76 and coupled with the signal S delayed on the route 74 at a distortion separating point 78 (coupler 80) and the distortion D caused by the amplifier 62 is separated. The output of the cooler 80 is inputted to a gain/phase regulator 88, controlled by a gain/phase control circuit 90 and inputted to an amplifier 96. This output is composed of the amplified signal S and a distortion signal d1 generated by the amplifier 96. A step 64 is designed for canceling the signal D at a coupler 100 and a residual distortion D in an output 86 is reduced.
-
公开(公告)号：JP2000114882A
公开(公告)日：2000-04-21
申请号：JP27305099
申请日：1999-09-27
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MYER ROBERT EVAN
IPC: H03D13/00
Abstract: PROBLEM TO BE SOLVED: To obtain a phase detector showing one absolute voltage with respect to each phase difference between ±180 deg. by nearly equalizing the amplitude of a second amplitude-adjusted distribution signal to the amplitude of a second input signal. SOLUTION: A splitter generates signals S32-1, S32-2 to respectively guide to a phase adjuster 34 and an attenuator 36. The signal S32-1, Sb are phase- shifted by phase adjusters 34 and 38 to generate output signals S34, S38. For example, the adjusters 34 and 38 are used for setting the absolute voltage of 0 volt for showing a phase difference 0 deg. between signal Sa and Sb. The amplitude of the signal S32-2 is adjusted by the attenuator 36 to generate a signal S36. The signal S32-2 is attenuated so that the signal S36 may be provided with nearly the same amplitude with the signal Sb. The signals S36, S38 are given to an adder 40 as inputs to generate a signal S40 as a result. The signal S40 is provided with nearly the same phase as the average phase of the signals S36, S38.
-
公开(公告)号：JP2002139514A
公开(公告)日：2002-05-17
申请号：JP2001271372
申请日：2001-09-07
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MYER ROBERT EVAN
Abstract: PROBLEM TO BE SOLVED: To provide an inexpensive RF test probe capable of ensuring consistent measurement of RF signals with minimum effect on a circuit to be tested. SOLUTION: This inexpensive RF test probe ensures the consistent monitoring of the RF signal with minimum effect on the circuit to be tested. The RF test probe includes a return conductor and a probe conductor. The probe conductor is disposed in an insulator, and a terminating end such as a resistor of 50 Ωis electrically disposed between a contact conductor and the probe conductor. The probe is used by providing a part of an insulating material which is brought into contact with a circuit such as an RF micro-strip conveying the RF signal to be monitored and surrounds the probe conductor.
-
公开(公告)号：JP2001111437A
公开(公告)日：2001-04-20
申请号：JP2000240718
申请日：2000-08-09
Applicant: LUCENT TECHNOLOGIES INC
Inventor： GHANADAN REZA , MYER ROBERT EVAN
Abstract: PROBLEM TO BE SOLVED: To improve the accuracy of adjustment of gain and phase. SOLUTION: An adaptability gain can/or phase adjustment control device for reducing adjustment accuracy and increasing a convergence speed for a large error signal (separated from zero) and adjusting gain and a phase at high accuracy for an error signal (close to zero) is provided. In a feedforward distortion reduction system e.g. such an error that an error signal repeatedly jumps zero due to the limitation of adjustment accuracy can be suppressed without sacrificing the temporary response of an amplifier.
-
Patent Agency Ranking
公开(公告)号：JP2000165153A
公开(公告)日：2000-06-16
申请号：JP32776799
申请日：1999-11-18
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MYER ROBERT EVAN
IPC: H03F1/32
Abstract: PROBLEM TO BE SOLVED: To improve reduction of distortion and to reduce necessity of phase and/or gain control by reducing second distortion from a correction amplifier by using a second correction amplifier and reducing distortion on a main signal line by using more stable display in which the distortion from a main amplifier is improved. SOLUTION: A signal S to be amplified by the main amplifier 146 is received by a nesting type feedforward system 140. And a splitter 148 is directed toward a main signal route 150 to reproduce or generate analog display of the signal S and to reach the main amplifier 146 and a feedforward route 152 to reach nesting type feedforward devices 142 and 144. The signal is impressed on a gain or phase adjuster 156 on the main route, the phase and the gain of the signal S on the main route are adjusted. Output of the gain and phase adjuster 156 is impressed on the amplifier 146, however, a distortion signal D like tertiary IMD to be generated by the amplification signal S and the amplifier 146 is included in output of the amplifier 146.
-
公开(公告)号：JP2000151472A
公开(公告)日：2000-05-30
申请号：JP27205799
申请日：1999-09-27
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MYER ROBERT EVAN
Abstract: PROBLEM TO BE SOLVED: To provide a control system through the use of a pilot signal obtaining information for the whole operation frequency band of an electric circuit without interference with a signal generated by the electric circuit by obtaining information used for substantially canceling a distortion from a carrier signal modulating the pilot signal. SOLUTION: A carrier circuit 184 connected to a single side band(SB) modulator 182 and a detection circuit 186 is contained. An electric circuit 108 generates a distortion and the distortion is separated by a loop 1 at a point A. A loop 2 uses information obtained from the detection circuit 186 for canceling the distortion generated by the electric circuit 108. Information obtained by the detection circuit 186 is collected from the carrier signal modulating the pilot signal applied to the electric circuit 108 by using the carrier circuit 184 and the SSB modulator 182 through a route 146 and a coupler 105.
-
公开(公告)号：JP2000049539A
公开(公告)日：2000-02-18
申请号：JP17038699
申请日：1999-06-17
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MYER ROBERT EVAN , PATEL MOHAN , WEN JACK CHI-CHIEH
Abstract: PROBLEM TO BE SOLVED: To provide a mixer of a dynamic range that becomes wider. SOLUTION: A frequency mixing system uses a feedforward device to reduce the distortion of a signal which occurs due to the amplitude adjustment of an input signal and generates a needed frequency conversion signal which includes the cross modulation distortion of a level that is lower and/or allowable. For instance, the distortion of a signal from a 1st path can be introduced onto a 2nd path 22 and next, a frequency converted by using a 2nd mixer 38 on the path 22 is returned to the 1st path to supply a necessary frequency conversion signal including the cross modulation distortion of a level that is allowable and/or lower and to connect with the distortion of the signal on the 1st path. The frequency mixing system supplies an expanded dynamic range by increasing the difference between the amplitude of the necessary frequency conversion signal and the amplitude of the cross modulation distortion.
-
公开(公告)号：JP2001119318A
公开(公告)日：2001-04-27
申请号：JP2000258448
申请日：2000-08-29
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MYER ROBERT EVAN
Abstract: PROBLEM TO BE SOLVED: To provide a method for making the number of antennas in a wireless communication system to be minimum. SOLUTION: The repeater of a single antenna is constituted of a single antenna 20 and a related circuit connected to the single antenna. The related circuit has an amplifier 32, and a circulator 22 having a first terminal, a second terminal and a third terminal which are adjacent to one another in the circulating direction. A signal received by the first terminal is sent to the second terminal, a signal received by the second terminal is sent to the third terminal and a signal received by the third terminal is sent to the first terminal. The first terminal is connected to the single antenna, the second terminal is connected to the input of the amplifier and the third terminal is connected to the output of the amplifier.
-
公开(公告)号：JP2001086555A
公开(公告)日：2001-03-30
申请号：JP2000243620
申请日：2000-08-11
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MYER ROBERT EVAN
Abstract: PROBLEM TO BE SOLVED: To directly execute a call between mobile stations without using network resources and without the generation of network charge by constituting a system by a means for transmitting/receiving a signal with a first mobile telephone through the use of a base station transmitting/receiving frequency band during a local call mode or the like. SOLUTION: A processor 150 controls a second switch 138, a reception mixer 1274 receives an L0 signal from a second frequency synthesizing device 128, the L0 signal is made to be IF of normal mobile transmission bands MTL-MTH and a modulator 130 receives a carrier wave from a first synthesizing device 126 having a frequency of normal reception bands MRL-MRH. Input of the mixer 124 is changed-over into the frequency to be outputted from the second frequency synthesizing device 128. Besides, a carrier wave signal to be inputted to the modulator 130 is changed-over into the frequency from the first frequency synthesizing device 126. Then transmission and reception is executed by a transmitting/receiving frequency of the base station.
-
-
-
-
-
-
-
-
-
Search Results
119
records
(took 0.026 seconds)
