Miniaturisation of combline filters for switched-mode power amplifier systems

Serebryakova, Elena GND; Blau, Kurt GND; Hein, Matthias GND

This paper presents a coaxial combline filter for a class-S power amplifier for an operating frequency of 450 MHz. According to the measurement results, the filter provides a bandwidth of 26 MHz, an insertion loss of 0.55 dB, and a second pass-band only at 2.8 GHz. As the filter dimensions are crucial for the envisaged application, different ways to miniaturise the filter are proposed and their features and disadvantages discussed.

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Serebryakova, Elena / Blau, Kurt / Hein, Matthias: Miniaturisation of combline filters for switched-mode power amplifier systems. 2008.

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