Abstract:
The invention refers to a filter unit (1) and a corresponding printed circuit board (2). The filter unit (1) and the printed circuit board (2) have been equipped with modified end portions (7, 8, 22, 23) being matched such that a number of filter units (1) can be used on the printed circuit board (2) without changing the printed circuit board (2).
Abstract:
The present invention relates to a signal directing means (1, 1', 1'', 36) for dividing or combining signals. It comprises a bottom row first port (2), a first row first and second port (3, 4),and a bottom row signal connector (5).The signal directing means (1, 1',1 '', 36) further comprises a first row first and second amplifier (9; 9'; 10; 10'), each first row amplifier (9, 10; 9', 10') having a corresponding first and second terminal (9a, 10a; 9a', 10a'; 9b, 10b; 9b', 10b'), said first terminals (9a, 10a; 9a', 10a') being connected along the bottom row signal connector (5). The signal directing means (1, 1', 1'', 36)also comprises a first row signal connector (11), where said second terminals (9b, 10b; 9b', 10b') are connected along the first row signal connector (11). The second terminal (9b; 9b') of the first row first amplifier (9, 9') is connected to the first row first port (3) and the second terminal (10b; 10b') of the first row second amplifier (10; 10') is connected to the first row second port (4).Top row ports (3', 4', 25; 19, 20, 27, 29; 19', 20', 27', 29') each comprise a signal connector (37, 38, 39; 1 40, 41, 42, 43; 40', 41', 42', 43') and a port terminal (44, 45, 46; 47, 48, 49, 50; 47', 48', 49', 50').Connecting impedances (50, 51; 52, 53, 54) connect the top row ports (3', 4', 25; 19, 20, 27, 29; 19', 20', 27', 29').
Abstract:
The invention provides an active circulator for a microwave system. Said microwave system comprises at least one front-end arrangement. Each front-end arrangement comprises a power amplifier function arranged to deliver an amplified output signal via a circulator function to an antenna in a transmit mode. A low noise ampiifier function is arranged to amplify an input signal from the antenna via the circulator function in a receive mode. The circulator function is arranged to direct a signal flow between the transmit and receive modes wherein each front-end arrangement comprises one active circulator. Said active circulator comprises the power ampiifier function, the low noise amplifier function and the circulator function of directing a signal flow, said three functions integrated into one module. The invention also provides a method to manufacture the active circulator.
Abstract:
The invention provides a distributed power amplifier arranged to operate over a bandwidth B . The distributed power amplifier has an input side with an input terminal arranged to receive an input signal and connected to an input transmission line and an output side with an output terminal adapted to deliver an output signal and connected to an output transmission line. A power splitter is connected to the input terminal, thus being arranged to divide the input signal in a first path to the input transmission line and in a second path to an input of an active matching circuit. The active matching circuit has an output connected to the output transmission line, the other end of the output transmission line is connected to the output terminal. The invention also provides a corresponding method to design a distributed power amplifier and to modify existing distributed power amplifiers.
Abstract:
The present invention relates to a filter unit (40), a bandpass filter (50) and a system (60) for detection. The filter unit (40) has a center frequency and comprises a first dielectric substrate (19), a first conducting plane (15), and at least one transmission arrangement (20).The at least one transmission arrangement (20) comprises a shunt node(25)which has a shunt connection (30) to the conducting plane (15). The electrical length of the shunt connection(30)defines the center frequency of the filter unit (40). The transmission arrangement(20)further comprises a plurality of transmission lines (23-1, …, 23-n, 24-1, …, 24-m) connected in series between an input port (21) and an output port (22), where in each port is connectable to auxiliary systems (31,32) with a system impedance. Moreover, each transmission line (23-1, …, 23-n, 24-1, …, 24-m) has a characteristic impedance (Za-1, …, Za-n, Zb1, …, Zb-m) and wherein the characteristic impedance(Za-1, …, Za-n, Zb1, …, Zb-m) of each transmission line (23-1, …, 23-n, 24-1, …, 24-m) is less than the system impedance.
Abstract:
A power circuit suitable for combining or splitting broadband signals. The circuit (10, 100) comprises: a stepped impedance section (20), a core section (30) and a first, second and third port (11, 12, 13), said stepped impedance section (20) and said core section (30) being interconnected at an interconnection (14). The stepped impedance section (20) comprises a first transmission line (21) running from said first port (11) to said interconnection (14), and the said core section (20) comprises a second and a third transmission line (31, 32) running from said interconnection (14) to the second and third ports (12, 13) respectively. The second and third transmission lines (31, 32) each have at least a first and a second core subsection (311, 312, 313, 31N, 321, 322, 323, 32N), where the number of core subsections (311, 312, 313, 31N) of the second transmission line (31) and the number of core subsections (321, 322, 323, 32N) of the third transmission line (32) is equal, to the number of stepped impedance subsections (251, 252, 253, 25N) of the stepped impedance section (20). The advantage of the power circuit is that a compact power divider or power combiner can be obtained.