LTCC (Low Temperature Co-Fired Ceramic) broadband power divider

Abstract

The invention discloses a broadband LTCC (Low Temperature Co-Fired Ceramic) power divider which is formed by connecting two stages of impedance transformers in series. Each stage of impedance transformer is formed by a reactance network formed by elements with lumped parameters; and the elements are implemented by a LTCC multilayer structure. The two stages of impedance transformers adopt a vertical series connection structure. The elements of the first stage of impedance transformer are positioned on a second layer to a ninth layer of a LTCC medium; and the elements of the second stage of impedance transformer are positioned on an eleventh layer to an eighteenth layer of the LTCC medium. An isolation resistance at the tail end of the first stage of impedance transformer is positioned on a tenth layer of the LTCC medium and is implemented by printing resistance paste; and an isolation resistance at the tail end of the second stage of impedance transformer is positioned on a nineteenth layer of the LTCC medium and is implemented by printing the resistance paste. The two stages of impedance transformers are isolated by metal grounds on the ninth layer and the eleventh layer in phase mode. The power divider has the advantages of small volume, low cost, wide bandwidth, high isolation, high temperature stability, convenience in use and the like and is beneficial to batch production.

Description

technical field [0001] The invention belongs to the field of electronic technology, and relates to a power divider, in particular to a low-temperature co-fired ceramic (LTCC) power divider considering the packaging structure. Background technique [0002] The power splitter is an important three-port passive device in the radio frequency circuit. Its main function is to realize the equal power and equal phase distribution of the input signal, or on the contrary to realize the equal power and equal phase combination of two input signals. A good power splitter requires a relatively wide operating frequency band, low insertion loss, good amplitude and phase consistency of the two signals, and high isolation between the two signals. In addition, the smallest possible size of the power divider is also a requirement for the development of electronic systems towards miniaturization and light weight. [0003] The traditional power divider generally adopts the form of Wilkinson powe...

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Problems solved by technology

[0003] The traditional power divider generally adopts the form of Wilkinson power divider, and realizes impedance matching through a quarter-wavelength impedance line. The implementation of the impedance line adopts a planar structure, which occupies a relatively large area and cannot meet the miniaturization requirements of radio frequency circuits.

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