EP 0727112 A4 19980121 - DUAL-MODE WIRELESS UNIT WITH TWO SPREAD-SPECTRUM FREQUENCY BANDS

Title (en)

DUAL-MODE WIRELESS UNIT WITH TWO SPREAD-SPECTRUM FREQUENCY BANDS

Title (de)

FUNKSYSTEM MIT ZWEI BETRIEBSARTEN UND ZWEI SPREIZSPEKTRUMFREQUENZBÄNDERN

Title (fr)

UNITE BIMODE SANS FIL A DEUX BANDES DE FREQUENCES A ETALEMENT DE SPECTRE

Publication

EP 0727112 A4 19980121 (EN)

Application

EP 95908412 A 19941031

Priority

US 9412464 W 19941031
US 14649293 A 19931101

Abstract (en)

[origin: WO9512925A1] The invention provides a dual-band spread-spectrum modulator (101, 103, 105) which uses a single, relatively narrow, synthesizer to serve two operating frequency bands (102, 104). In the lower frequency band, the synthesizer may operate in a high-side injection mode, while in the higher frequency range, the synthesizer may operate in a low-side injection mode. In a preferred embodiment, the lower frequency range may comprise about 1850 to 1990 megahertz, while the higher frequency range may comprise about 2400 to 2483.5 megahertz.

IPC 1-7

H04B 1/713

IPC 8 full level

H04B 1/40 (2006.01); H04B 1/69 (2006.01); H04B 1/707 (2006.01); H04B 7/26 (2006.01); H04J 13/00 (2011.01); H04J 13/02 (2006.01); H04L 1/00 (2006.01); H04L 27/12 (2006.01); H04Q 7/32 (2006.01)

CPC (source: EP KR)

H04B 1/005 (2013.01 - EP); H04B 1/0057 (2013.01 - EP); H04B 1/406 (2013.01 - EP); H04B 1/69 (2013.01 - EP); H04B 7/2634 (2013.01 - EP); H04J 13/00 (2013.01 - EP); H04J 13/10 (2013.01 - KR); H04L 1/0001 (2013.01 - EP); H04L 27/12 (2013.01 - EP); H04W 88/06 (2013.01 - KR)

Citation (search report)

[Y] DE 3627045 A1 19880511 - QUANTE FERNMELDETECHNIK GMBH [DE]
[Y] EP 0450382 A2 19911009 - METRICOM INC [US]
[A] US 4368439 A 19830111 - SHIBUYA KIYOSHI [JP], et al
See references of WO 9512925A1

Designated contracting state (EPC)

AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family (publication)

WO 9512925 A1 19950511; CA 2175085 A1 19950511; EP 0727112 A1 19960821; EP 0727112 A4 19980121; IL 111471 A0 19941229; IL 111471 A 19980615; JP 3692140 B2 20050907; JP H09504669 A 19970506; KR 960706234 A 19961108

DOCDB simple family (application)

US 9412464 W 19941031; CA 2175085 A 19941031; EP 95908412 A 19941031; IL 11147194 A 19941031; JP 51332595 A 19941031; KR 19960702229 A 19960430