FIELD: radio engineering.
SUBSTANCE: invention can be the basis of diplexers in radio receivers that separate the operating bands of signals by frequency. The filter contains a resonator formed by series-connected capacitive 49 and inductive 50 elements, the first and second parallel circuits on the elements; one of them is made on capacitive 52 and inductive 51 elements, and the second - on capacitive 53 and inductive 54 elements. The first circuit together with the inductive elements 55 and 56 forms a high pass filter. The second circuit together with capacitance elements 57 and 58 forms a low pass filter. Capacitive elements 59 and 60 are used to connect the device with loads at the input and output. The parameters of the elements satisfy certain relationships.
EFFECT: simplification of the implementation of the selective properties of two-band filters without parasitic passbands.
1 cl, 7 dwg
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