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公开(公告)号：EP0835456A1
公开(公告)日：1998-04-15
申请号：EP96922119.0
申请日：1996-06-28
申请人： PYRONIX LIMITED
发明人： KONSTANDELOS, John
CPC分类号： H01Q23/00 , G01S7/032 , G01S13/56 , H01Q1/247 , H01Q9/0457
摘要： A motion detection unit for detecting motion by means of Doppler frequency shift which comprises: a microwave circuit board (1) comprising an oscillator (14), a hybrid coupler circuit element (11) and a mixer (12); an antenna board (2) comprising at least one transmit and receive antenna (4, 5); and a ground plane layer, the two boards (1, 2) being superimposed with the ground plane layer intervening, wherein, in operation, the hybrid coupler circuit element (11) divides power from the oscillator (14), into power for the antenna transmission signal and local oscillator (LO) power to the mixer (12), and directs a received signal from the antenna (4, 5) to the mixer (12), the local oscillator (LO) power and the received signal being combined in the mixer (12) to produce a Doppler signal output.
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公开(公告)号：EP0835456B1
公开(公告)日：1999-07-28
申请号：EP96922119.1
申请日：1996-06-28
申请人： PYRONIX LIMITED
发明人： KONSTANDELOS, John
CPC分类号： H01Q23/00 , G01S7/032 , G01S13/56 , H01Q1/247 , H01Q9/0457
摘要： A motion detection unit for detecting motion by means of Doppler frequency shift which comprises: a microwave circuit board (1) comprising an oscillator (14), a hybrid coupler circuit element (11) and a mixer (12); an antenna board (2) comprising at least one transmit and receive antenna (4, 5); and a ground plane layer, the two boards (1, 2) being superimposed with the ground plane layer intervening, wherein, in operation, the hybrid coupler circuit element (11) divides power from the oscillator (14), into power for the antenna transmission signal and local oscillator (LO) power to the mixer (12), and directs a received signal from the antenna (4, 5) to the mixer (12), the local oscillator (LO) power and the received signal being combined in the mixer (12) to produce a Doppler signal output.
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