Articles | Volume 6
https://doi.org/10.5194/ars-6-125-2008
https://doi.org/10.5194/ars-6-125-2008
26 May 2008
 | 26 May 2008

Miniaturisation of combline filters for switched-mode power amplifier systems

E. Serebryakova, K. Blau, and M. Hein

Abstract. 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.