公开(公告)号：EP1051808A1

公开(公告)日：2000-11-15

申请号：EP99903156.0

申请日：1999-01-19

申请人： ADC Solitra, Inc.

发明人： HUANG, Guanghua ,  HARKONEN, Markku

IPC分类号： H04B1/10 ,  H01P1/20 ,  H03D9/06

CPC分类号： H01P1/20 ,  H03D9/06 ,  H04B1/10

摘要： A circuit arrangement that reduces selected intermodulation. The circuit arrangement includes a signal amplifier coupled to a bandpass filter via an electrical path. Signal energy outside the passband is reflected back into the amplifier and causes intermodulation. The electrical path is constructed with a length that reduces intermodulation, where the length is an odd multiple of one-fourth the wavelength of a predetermined frequency in the passband. The length of the electrical path reduces intermodulation because certain signals reflected by the bandpass filter are approximately 180°, or an odd multiple thereof, out of phase. Energy of problematic signals that are near the edge of the passband or in the stopband is reduced, such as third order intermodulation product and pairs of signals that produce third order intermodulation products.

公开(公告)号：EP1051807A1

公开(公告)日：2000-11-15

申请号：EP99902107.4

申请日：1999-01-19

申请人： ADC Solitra, Inc.

发明人： HUANG, Guanghua ,  KYLLONEN, Kimmo, Antero

IPC分类号： H04B1/10 ,  H03D9/06 ,  H01P1/205

CPC分类号： H01P1/205 ,  H03D9/06 ,  H04B1/10

摘要： A bandpass filter arrangement that includes a weakly coupled coaxial resonator to reduce the fluctuation in frequency response of the filter arrangement. A bandpass filter is coupled to the output of a low noise amplifier. The characteristic fluctuation in frequency response in the passband of the bandpass filter is reduced with a coaxial resonator that is disposed proximate the filter arrangement.

公开(公告)号：EP1010208A1

公开(公告)日：2000-06-21

申请号：EP98911793.2

申请日：1998-03-18

申请人： ADC Solitra, Inc.

发明人： RAVASKA, Lasse, Beli ,  KYLLONEN, Kimmo, Antero ,  HUANG, Guanghua ,  HILL, Lenny, Russell

IPC分类号： H01P1/205 ,  H01P1/213

CPC分类号： H01P1/2053 ,  H01P1/2136

摘要： A combined resonator-cavity filter includes a number of cavity structures designed for cooperative arrangement within a housing. The resonator cavities are constructed and arranged to pass energy in an assigned frequency band. The cavities include a first cavity structure having a corresponding cavity volume and constructed to provide a first Q, and a second cavity structure having its corresponding cavity volume and constructed to provide a second Q. The cavity volume corresponding to the second cavity structure is less than the cavity volume corresponding to the first cavity structure. Other aspects are directed to the arrangement and uses of sets of such cavity structures as part of a combined duplexer-receiver having the same housing.