A Design of 8mm-Wave Broadband Frequency Synthesis

To satisfy the requirements of low phase noise, millimeter-wave broadband signals proposed by modern electronic systems, a frequency synthesis circuit design using cascade comb generators with a high-efficient mixing scheme is proposed. By the adoption of the highly integrating process, this frequency synthesizer is achieved in 110 mm × 80 mm × 20 mm, which covers 29 GHz–39.5 GHz. Within the operation frequency band, the phase noise is less than −100 dBc/Hz@1 kHz and less than −106 dBc/Hz@10 kHz. The spurious suppression is better than 60 dBc.