MY128729A - Device and process for telecommunication - Google Patents

Device and process for telecommunication

Info

Publication number
MY128729A
MY128729A MYPI98000585A MYPI9800585A MY128729A MY 128729 A MY128729 A MY 128729A MY PI98000585 A MYPI98000585 A MY PI98000585A MY PI9800585 A MYPI9800585 A MY PI9800585A MY 128729 A MY128729 A MY 128729A
Authority
MY
Malaysia
Prior art keywords
basic frequency
frequency band
filter
harmonics
power amplifier
Prior art date
Application number
MYPI98000585A
Inventor
Tomas Bolin
Per-Olof Brandt
Ulrik Imberg
Original Assignee
Ericsson Telefon Ab L M
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from SE9700669A external-priority patent/SE508506C2/en
Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of MY128729A publication Critical patent/MY128729A/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/0153—Electrical filters; Controlling thereof
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
    • H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
    • H03F3/193—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only with field-effect devices
    • H03F3/1935—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only with field-effect devices with junction-FET devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/72—Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/0123—Frequency selective two-port networks comprising distributed impedance elements together with lumped impedance elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/17—Structural details of sub-circuits of frequency selective networks
    • H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
    • H03H7/1775—Parallel LC in shunt or branch path
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/17—Structural details of sub-circuits of frequency selective networks
    • H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
    • H03H7/1791—Combined LC in shunt or branch path
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/38—Impedance-matching networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transmitters (AREA)
  • Amplifiers (AREA)
  • Transceivers (AREA)
  • Filters And Equalizers (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Burglar Alarm Systems (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)

Abstract

THE PRESENT INVENTION RELATES TO A POWER AMPLIFIER DEVICE (10), SWITCHABLE FOR AT LEAST TWO SEPARATE BASIC FREQUENCY BANDS, FOR RADIO FREQUENCY SIGNALS WITH EFFECTIVE SUPPRESSION OF HARMONICS, WHERE HARMONICS, CORRESPONDING TO A FIRST BASIC FREQUENCY BAND, CAN BE PERMITTED TO OVERLAP THE FREQUENCY RANGE OF AT LEAST ONE SECOND BASIC FREQUENCY BAND. THE POWER AMPLIFIER DEVICE (10) COMPRISES A POWER AMPLIFIER (1) AND AN IMPEDANCE MATCHING CIRCUIT (2), SWITCHABLE BY MEANS OF A PIN-DIODE, WHICH PROVIDES A LOAD IMPEDANCE ADAPTED TO EACH INDIVIDUAL BASIC FREQUENCY BAND. FURTHERMORE, THE POWER AMPLIFIER DEVICE COMPRISES A FILTER DEVICE (3) COMPRISING A FIXED LOW-PASS FILTER (3B) AND A SWITCHABLE FILTER (3B) ACTING AS AN ENGAGEABLE AND DISENGAGEABLE NOTCH FILTER, WHICH COMPRISES AT LEAST ONE REVERSIBLE PIN-DIODE. THIS SWITCHABLE FILTER (3A) ALLOWS TO PASS, IN A FIRST MODE, SIGNALS IN THE FIRST BASIC FREQUENCY BAND AND SUPPRESSES AT THE SAME TIME AT LEAST ONE ORDER OF HARMONICS CORRESPONDING TO THIS BASIC FREQUENCY BAND. IN A SECOND MODE, THE SECOND BASIC FREQUENCY BAND IS TRANSMITTED WITHOUT APPRECIABLE LOSSES, AND HARMONICS ARE SUPPRESSED BY THE FIXED LOW-PASS FILTER (3A).(FIG. 2)
MYPI98000585A 1997-02-25 1998-02-12 Device and process for telecommunication MY128729A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9700669A SE508506C2 (en) 1997-02-25 1997-02-25 Device and method of telecommunication

Publications (1)

Publication Number Publication Date
MY128729A true MY128729A (en) 2007-02-28

Family

ID=20405927

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI98000585A MY128729A (en) 1997-02-25 1998-02-12 Device and process for telecommunication

Country Status (5)

Country Link
JP (1) JP4073964B2 (en)
KR (1) KR100463924B1 (en)
AU (1) AU737208B2 (en)
EE (1) EE03499B1 (en)
MY (1) MY128729A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5062797B2 (en) * 2000-05-22 2012-10-31 昭和電工株式会社 Organic electroluminescence device and light emitting material
CN1762097B (en) * 2003-03-14 2010-10-13 株式会社Ntt都科摩 Matching circuit and power amplifier including matching circuit
US7567782B2 (en) * 2006-07-28 2009-07-28 Freescale Semiconductor, Inc. Re-configurable impedance matching and harmonic filter system
KR101548811B1 (en) 2013-10-31 2015-08-31 삼성전기주식회사 Dual band wireless communication apparatus with advanced harmonic spurious reduction
WO2015093462A1 (en) 2013-12-20 2015-06-25 株式会社村田製作所 High-frequency circuit and transceiver circuit using high-frequency circuit
WO2016125515A1 (en) 2015-02-02 2016-08-11 株式会社村田製作所 Variable filter circuit, high-frequency module circuit, and communication device
WO2018061950A1 (en) 2016-09-29 2018-04-05 株式会社村田製作所 Acoustic wave filter device, multiplexer, high-frequency front end circuit, and communication device
WO2018061949A1 (en) * 2016-09-29 2018-04-05 株式会社村田製作所 Acoustic wave filter device, multiplexer, high-frequency front end circuit, and communication device
WO2018135538A1 (en) * 2017-01-19 2018-07-26 株式会社村田製作所 High frequency filter, high frequency front end circuit and communication device
CN108183331B (en) * 2017-12-14 2020-12-01 Oppo广东移动通信有限公司 Antenna tuning circuit, antenna device and mobile terminal
CN114844515B (en) * 2022-03-25 2023-08-29 中国电子科技集团公司第二十九研究所 Device and method for improving spectrum quality of high-power output signal of broadband electronic equipment

Also Published As

Publication number Publication date
KR20000070991A (en) 2000-11-25
HK1027225A1 (en) 2001-01-05
JP4073964B2 (en) 2008-04-09
EE03499B1 (en) 2001-08-15
EE9900365A (en) 2000-04-17
AU6641298A (en) 1998-09-09
JP2001512642A (en) 2001-08-21
AU737208B2 (en) 2001-08-09
KR100463924B1 (en) 2004-12-30

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