CMOS low gain wide tuning range fully integrated ka band millimeter wave quadrature voltage controlled oscillator

Abstract

The invention discloses a CMOS low-gain wide-tuning-range fully integrated Ka-band millimeter wave quadrature voltage-controlled oscillator. A MOS variable capacitor tube array directly controlled by high and low levels is added into an oscillator resonant cavity to switch access capacitance so as to achieve multi-subband tuning for obtaining low-tuning gain, a wide regulating range, and good phase noise performance. In addition, a coplanar waveguide linear inductor used in the voltage-controlled oscillator has a high quality factor in order to achieve better phase noise performance. A circuit directly outputs a differential orthogonal signal with a high orthogonal precision (less than 1 degree). The phase noise of the voltage-controlled oscillator may reach -107.3dBc / Hz and -129.6dBc / Hz at the frequency offset 1MHz and 10MHz at the center frequency 30GHz, respectively. The voltage-controlled oscillator has total power consumption of 80mW, and can be used as a local oscillation signal source in a Ka-band wireless communication system or a voltage-controlled oscillator in a frequency synthesizer.

Description

technical field [0001] The invention belongs to the technical field of millimeter-wave integrated circuit design, in particular to a fully integrated Ka-band millimeter-wave quadrature voltage-controlled oscillator with low gain and wide tuning range of complementary metal oxide semiconductors, which can be used in high-speed wireless communication systems with complex modulation. Background technique [0002] In recent years, with the rapid growth of demand for broadband services, especially broadband multimedia services, low-band wireless communication systems such as L-band (1-2GHz) or C-band (4-8GHz) have become saturated, and lower-band It cannot adapt to high-speed, large-bandwidth communication systems, which forces scholars at home and abroad to turn to research on wireless communication in the millimeter wave band (30-300GHz). [0003] The millimeter wave band has an extremely wide bandwidth, which is undoubtedly very attractive in today's tight frequency resources....

AI Technical Summary

Problems solved by technology

Samsung and South Korea's SK Telecom have previously completed the test of the fifth-generation (5G) mobile communication system based on 28GHz millimeter wave, but there is still a distance from the official commercial use of 5G mobile communication technology.

However, the substrate loss of the CMOS process is large, which brings challenges to the design of high-quality factor passive devices; and the cut-off frequency of active devices under the CMOS process is relatively low, and the high-performance Ka-band millimeter-wave voltage-controlled oscillation is realized based on the CMOS process. device is always a big problem

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