EP1197002A1 - Heterodyner mobilfunkempfänger mit vereinfachter eingangsfilterung - Google Patents

Heterodyner mobilfunkempfänger mit vereinfachter eingangsfilterung

Info

Publication number
EP1197002A1
EP1197002A1 EP00938480A EP00938480A EP1197002A1 EP 1197002 A1 EP1197002 A1 EP 1197002A1 EP 00938480 A EP00938480 A EP 00938480A EP 00938480 A EP00938480 A EP 00938480A EP 1197002 A1 EP1197002 A1 EP 1197002A1
Authority
EP
European Patent Office
Prior art keywords
low
filter
mobile radio
pass filter
heterodyne
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP00938480A
Other languages
German (de)
English (en)
French (fr)
Inventor
Ralf SCHÖBEL
Michael Wilhelm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
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
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1197002A1 publication Critical patent/EP1197002A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/26—Circuits for superheterodyne receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line

Definitions

  • Figure 1 shows the structure of a heterodyne receiver according to the invention in a schematic manner.
  • FIG. 2 shows the structure of a heterodyne receiver which has been customary to date in a schematic manner.
  • bandpass filters of this new type make it possible to construct a heterodyne receiver in a simplified manner.
  • a bandpass filter with a very high near selection is used as the front-end filter, as has basically been used up to now as an inter-day filter, i.e. was used as a bandpass filter between the preamplifier and the first mixing stage, but the new front-end filter according to the invention is distinguished by an extremely high near selection, which was not previously available.
  • heterodyne radio receivers in particular heterodyne radio receivers, have in principle been constructed as follows:
  • the output signal of an antenna was fed to a front end filter, which was connected upstream of a typically very low-noise preamplifier.
  • the output signal of this low-noise preamplifier was fed to an interstage filter, the output signal of which in turn was fed to the first mixer stage (first mixer).
  • the front-end filter with the usual design is usually characterized by a lower selection and a lower insertion loss in the useful band, whereas the interstage filter had a higher selection.
  • the novel heterodyne radio receiver shown in FIG. 1 is now constructed in a simplified manner by using a highly selective bandpass filter as the front-end filter, the filter characteristics of which are so good that in the interstage area, that is, between the low-noise preamplifier and the first mixer only a high-pass filter or a low-pass filter is required.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Superheterodyne Receivers (AREA)
  • Noise Elimination (AREA)
EP00938480A 1999-07-15 2000-04-11 Heterodyner mobilfunkempfänger mit vereinfachter eingangsfilterung Withdrawn EP1197002A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19933267 1999-07-15
DE19933267 1999-07-15
PCT/DE2000/001109 WO2001006667A1 (de) 1999-07-15 2000-04-11 Heterodyner mobilfunkempfänger mit vereinfachter eingangsfilterung

Publications (1)

Publication Number Publication Date
EP1197002A1 true EP1197002A1 (de) 2002-04-17

Family

ID=7914941

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00938480A Withdrawn EP1197002A1 (de) 1999-07-15 2000-04-11 Heterodyner mobilfunkempfänger mit vereinfachter eingangsfilterung

Country Status (3)

Country Link
EP (1) EP1197002A1 (zh)
CN (1) CN1353883A (zh)
WO (1) WO2001006667A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100433543C (zh) * 2005-05-09 2008-11-12 凌阳科技股份有限公司 高载波抑制的升频混波系统
US20130315355A1 (en) * 2010-12-15 2013-11-28 Lothar Vogt Wideband sampling with phase diversity

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3701134A1 (de) * 1987-01-16 1988-07-28 Siemens Ag Extrem breitbandiger funkempfaenger

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0106667A1 *

Also Published As

Publication number Publication date
CN1353883A (zh) 2002-06-12
WO2001006667A1 (de) 2001-01-25

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