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公开(公告)号：AU2003292351A8
公开(公告)日：2004-05-04
申请号：AU2003292351
申请日：2003-10-03
Applicant: THOMSON LICENSING SA
Inventor： MAHDJOUBI KOUROCH , LOUZIR ALI , TAROT ANNE-CLAUDE , BOISBOUVIER NICOLAS , BOLZER FRANCOISE LE
Abstract: The forbidden photonic band manufacture has a formation on the substrate face opposite the face receiving the periodic shape slots (4). The shapes are in forbidden photonic band material. The forbidden photonic band is formed on a microwave mechanism forming slot type antennas.
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公开(公告)号：SE521035C2
公开(公告)日：2003-09-23
申请号：SE9704896
申请日：1997-12-29
Applicant: ERICSSON TELEFON AB L M
Abstract: The present invention relates to an arrangement (1) and a method in a receiver in a multi-mode mobile radio (m), wherein the intention is to design the receiver so that it uses the same hardware to process several different channel bandwidths corresponding to the different networks used by the radio (m). This is done by changing a sampling frequency (fs) which controls a digital filter unit (25) situated in the digital part of the receiver. The changing of the sampling frequency (fs) results in that the bandwidth of the digital filter unit (25) is scaled accordingly, wherein the desired channel bandwidth at baseband of the radio network (GSM1900, AMPS) to be used by the radio (m) is selected in the digital filter unit (25). As a complement, the digital filter unit (25) can be implemented with a programmable function, where a change of parameters and/or filter structure inside the digital filter unit (25) can be used to adjust the filter bandwidth.
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公开(公告)号：DE69713047D1
公开(公告)日：2002-07-11
申请号：DE69713047
申请日：1997-12-19
Applicant: HUGHES ELECTRONICS CORP
Inventor： DE LOS SANTOS HECTOR J
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公开(公告)号：CA2206986C
公开(公告)日：2001-05-29
申请号：CA2206986
申请日：1997-06-04
Applicant: NORTHERN TELECOM LTD
Inventor： FALT CHRISTOPHER
Abstract: A low-radiation balanced microstrip bandpass filter is provided. A series of microstrip segments are arranged on the surface of a substrate. The degree of coupling between adjacent pairs of segments is determined by the length of overlap between them. By always having pairs of segments, a very small far field radiation is achieved.
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公开(公告)号：GB2351615A
公开(公告)日：2001-01-03
申请号：GB0003597
申请日：2000-02-16
Applicant: MURATA MANUFACTURING CO
Inventor： ISHIKAWA YOHEI , IIO KENICHI , TANAKA HIROAKI , IDA YUTAKA
IPC: H01P7/08 , H01P1/203 , H01P1/213 , H01P7/10 , H03B5/18 , H04B1/40 , H01P7/00 , H01P1/201 , H01P3/02 , H01P5/12
Abstract: A dielectric resonator includes a slot line constructed by providing an electrode 2 having a spiral slot either on an external face or inside a dielectric layer 1. A shielding conductor 3 is positioned at a predetermined distance from the electrode. One end of the slot is short-circuited, while the other is open. Preferably, the width of the slot line is greater at the short-circuit end. A rectangular spiral may also be used (see figure 9A). The spiral configuration reduces skin effect conductor loss. The basic resonant line arrangement may be used to construct inductors (see figure 6A), capacitors (see figure 6B), filters (see figures 4, 5), oscillators (see figure 10) and duplexers (see figure 20).
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Patent Agency Ranking
公开(公告)号：BR9814513A
公开(公告)日：2000-10-10
申请号：BR9814513
申请日：1998-12-22
Applicant: ERICSSON TELEFON AB L M
Abstract: The present invention relates to an arrangement (1) and a method in a receiver in a multi-mode mobile radio (m), wherein the intention is to design the receiver so that it uses the same hardware to process several different channel bandwidths corresponding to the different networks used by the radio (m). This is done by changing a sampling frequency (fs) which controls a digital filter unit (25) situated in the digital part of the receiver. The changing of the sampling frequency (fs) results in that the bandwidth of the digital filter unit (25) is scaled accordingly, wherein the desired channel bandwidth at baseband of the radio network (GSM1900, AMPS) to be used by the radio (m) is selected in the digital filter unit (25). As a complement, the digital filter unit (25) can be implemented with a programmable function, where a change of parameters and/or filter structure inside the digital filter unit (25) can be used to adjust the filter bandwidth.
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347.发明专利
公开(公告)号：GB2338349B
公开(公告)日：2000-10-04
申请号：GB9909198
申请日：1999-04-21
Applicant: MURATA MANUFACTURING CO
Inventor： MIKAMI SHIGEYUKI , HIRATSUKA TOSHIRO , SONODA TOMIYA , IDA YUTAKA , KANAGAWA KIYOSHI
Abstract: In a dielectric resonator device, electrodes having electrode non-formation sections opposite to each other and having substantially the same shape and size are formed on the opposite main faces of a dielectric plate. The portion of the dielectric plate sandwiched between the electrode non-formation sections opposite to each other is used as a dielectric resonator section. Further, the characteristics of the dielectric resonator device are adjusted by attaching dielectric chips inside of the dielectric resonator section or between adjacent dielectric resonator sections.
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公开(公告)号：AU720054B2
公开(公告)日：2000-05-25
申请号：AU2487397
申请日：1997-06-13
Applicant: NORTEL NETWORKS CORP
Inventor： FALT CHRISTOPHER
Abstract: A low-radiation balanced microstrip bandpass filter is provided. A series of microstrip segments (50,52,54,56,58) are arranged on the surface of a substrate. The degree of coupling between adjacent pairs of segments is determined by the length of overlap between them. By always having pairs of segments, a very small far field radiation is achieved.
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公开(公告)号：CA2346856A1
公开(公告)日：2000-04-27
申请号：CA2346856
申请日：1999-10-15
Applicant: PARATEK MICROWAVE INC
Inventor： SENGUPTA SOMNATH , STOWELL STEVEN C , KOZYREV ANDREY , ZHU YONGFEI , CHIU LUNA H , ZHANG XUBAI , SENGUPTA LOUISE
Abstract: A voltage tunable dielectric varactor includes a substrate having a low dielectric constant and having generally planar surface, a tunable ferroelectric layer positioned on the generally planar surface of th e substrate, and first and second electrodes positioned on a surface of the tunable ferroelectric layer opposite the generally planar surface of the substrate. The first and second electrodes are separated to form a gap therebetween. The varactor includes an input for receiving a radio frequency signal and an output for delivering the radio frequency signal. A bias voltage applied to the electrodes changes the capacitance of the varactor between the input and output thereof. Phase shifters and filters that include the varactor are also described.
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公开(公告)号：GB2338349A
公开(公告)日：1999-12-15
申请号：GB9909198
申请日：1999-04-21
Applicant: MURATA MANUFACTURING CO
Inventor： MIKAMI SHIGEYUKI , HIRATSUKA TOSHIRO , SONODA TOMIYA , IDA YUTAKA , KANAGAWA KIYOSHI
Abstract: A dielectric resonator comprises a dielectric plate 3 with electrodes 1 on both main sides, with circular openings 4a, 4b in the electrodes which form resonator sections. The characteristics of the resonator may be changed either by placing dielectric chips 21a-e on the plate, or by embedding parts 23a-e with a different dielectric constant to the plate within it (figure 13B). Chips or parts may be placed on or in the resonator sections to adjust resonant frequency of the section. Additionally, chips 21c or parts may be positioned between adjacent resonator sections to adjust the coupling factor between them. Embedded parts 23 may comprise air, and may extend through the plate (see figure 14B). The resonator may be used in constructing dielectric filters, oscillators (see figure 17), sharing devices (see figure 15) and other communication devices (see figure 16).
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