Frequency Multipliers Based on Hybrid Technology with High Harmonic Suppression

A wideband frequency multipliers using SiGe bipolar transistors are proposed in this paper. The main circuit of these frequency multipliers consists of an attenuator followed by a bias network and a band pass filter which selects the desired harmonic at the output. The designed doubler can convert a 2–3 GHz input signal to a 4–6 GHz signal, with high suppressions of 59 dB, and 41 dB on the fundamental, and the third harmonic respectively. The tripler can convert a 2.3-2.7 GHz input signal to a 7–8 GHz signal, with suppressions of 68 dB, 52 dB, and 43 dB on the fundamental, the second, and fourth harmonics respectively.