L-waveband miniature multilayer low-temperature co-firing ceramic balance filter

Abstract

The invention discloses an L-waveband miniature multilayer low-temperature co-firing ceramic balance filter. The L-waveband miniature multilayer low-temperature co-firing ceramic balance filter structurally and mainly comprises one input electrode, two output electrodes, two protective layers, two layers of strip lines, two layers of capacitor plates and four layers of metal shield plates. A balance output filter converted in different frequency, different pass-band width and different impedance can be designed by optimizing the two layers of coupling strip lines and a grounding capacitor, and functions of the balance output filter are equivalent to combined functions of one filter and one Balun. Compared with traditional multiple-layer balance filters, the L-waveband miniature multilayer low-temperature co-firing ceramic balance filter has the advantages of being simple in structure, small in size, prone to batch production and high in phase balance degree and amplitude balance degree.

Description

technical field [0001] The invention relates to a device combined with an equivalent balun and a filter, in particular to a balanced filter with an L-band micro-multilayer low-temperature co-fired ceramic structure. Background technique [0002] At present, most balanced filters designed with low-temperature co-fired ceramics (LTCC for short) technology adopt a multi-layer complex structure of a cascaded combination of baluns and filters with a concentrated parameter structure, and most of them need to use through-hole technology to realize the connection of conductors between layers. , so the size of the balanced filter is difficult to make small, while the insertion loss is large, and the amplitude and phase characteristics are not satisfactory. Such as the existing balanced output filter (application number: 200620108151.X publication number: 200956398). Contents of the invention [0003] In order to solve the above-mentioned problems of LTCC balanced filter design. T...

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Problems solved by technology

[0002] At present, most of the balanced filters designed with low temperature co-fired ceramics (LTCC for short) technology adopt a multi-layer complex structure of cascaded combination of balun and filter with concentrated parameter structure, and most of them need to use through-hole technology to realize the connection of conductors between layers. , so the size of the balanced filter is difficult to make small, while the insertion loss is large, and the amplitude and phase characteristics are not satisfactory

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