On-chip low-insertion-loss double-frequency transformer for terahertz harmonic extraction

Abstract

The invention relates to a terahertz harmonic extraction technology, in particular to an on-chip low-insertion-loss dual-frequency transformer for terahertz harmonic extraction, which comprises a primary coil and a secondary coil which are stacked from bottom to top, two ports of the primary coil are respectively input ports of a positive-phase fundamental frequency signal Pin + and a negative-phase fundamental frequency signal Pin-of a differential fundamental frequency signal, and two ports of the secondary coil are respectively input ports of a negative-phase fundamental frequency signal Pin-of the differential fundamental frequency signal. Two ports of the secondary coil are output ports of a positive-phase harmonic signal Pout + and a negative-phase harmonic signal Pout-of the differential harmonic signal respectively; the primary coil and the secondary coil are of a concentric octagonal structure. According to the dual-frequency transformer, the coupling degree between the primary coil and the secondary coil can be changed by setting different inner diameters of the dual-frequency transformer, so that the dual-frequency transformer shows a high-pass filtering characteristic, and terahertz harmonic signals are effectively extracted from high-frequency signals. The terahertz signal source generating circuit has the advantages of being simple in structure, small in insertion loss, small in size and low in manufacturing cost, and has extremely high application value in the on-chip terahertz signal source generating circuit.

Description

technical field [0001] The invention belongs to the technical field of terahertz harmonic extraction, in particular to an on-chip low insertion loss dual-frequency transformer used for terahertz harmonic extraction. Background technique [0002] Terahertz (Terahertz, THz) waves generally refer to electromagnetic waves in the range of 0.1 THz to 10 THz, and the corresponding wavelengths are 10 μm to 3 mm. Due to its high penetrability, strong spectral resolution, and non-ionization characteristics, the application of terahertz spectrum in biomedical imaging, spectral analysis, human security inspection, communication and other fields has extremely important research value. [0003] For terahertz systems, whether in applications such as communication or imaging, an oscillatory signal source in the terahertz frequency band is required, so the terahertz signal source is the key to promoting the application of terahertz technology. In recent years, with the development of integr...

AI Technical Summary

Problems solved by technology

However, the existing push-push harmonic extraction structure has the problems of complex design, large loss and low output power

Images