[1] [1] WANG N,WANG P,ALIPOUR-FANIDE A,et al.Physical-layer security of 5G wireless networks for IoT:Challenges and opportunities［J］.IEEE Internet of Things Journal,2019,6(5):8169-8181.

[2] [2] WONG K L,CHEN Y H,LI W Y.Conjoined ultra-wideband (2 300~6 000 MHz) dual antennas for LTE HB/WiFi/5G multi-input multi-output operation in the fifth-generation tablet device［J］.Microwave and Optical Technology Letters,2019,61(8): 1958-1963.

[4] [4] BURNETT D C,WHEELER B,LEE L,et al.CMOS oscillators to satisfy 802.15.4 and Bluetooth LE PHY specifications without a crystal reference［C］//Las Vegas,NV,USA:2019 IEEE 9th Annual Computing and Communication Workshop and Conference(CCWC),2019:0218-0223.

[7] [7] LEE T H,ALI H.Oscillator phase noise: a tutorial［J］.IEEE Journal of Solid-State Circuits,2000,35(3):326-336.

[8] [8] HATI M K,BHATTACHARYYA T K.A fast automatic frequency and amplitude control LC-VCO circuit with noise filtering technique for a fractional-N PLL frequency synthesizer［J］.Microelectronics Journal,2016,52:134-146.

[10] [10] ALI M,MEHRDAD S B,EHASAN A.25.8 a 2.4 GHz VCO with FOM of 190 dBc/Hz at 10 kHz-to-2 MHz offset frequencies in 0.13 μm CMOS using an ISF manipulation technique［C］//San Francisco,CA,USA:2015 IEEE International Solid-State Circuits Conference (ISSCC)-Digest of Technical Papers,2015:1-3.

[11] [11] YU F,QIANG T,WANG W Z,et al.A 2.7 GHz low phase noise LC-QVCO using the gate-modulated coupling technique［J］. Wireless Personal Communications,2016,86(2):671-681.

[12] [12] IKEDA S,LEE S,ITO H.A 0.5 V 5.96 GHz PLL with amplitude-regulated current-reuse VCO［J］.IEEE Microwave and Wireless Components Letters,2017,27(3):302-304.

[13] [13] ALBITTAR I F I,HAKAN D,MEHMET T O.A novel biasing technique for low phase noise voltage controlled oscillators［J］.Microelectronics Journal,2018,72:120-125.

[14] [14] KIM J,PARK J,KIM J G.A low phase noise multi-band LC VCO using a switched differential inductor［J］.IEICE Electronics Express,2018,15(7):20180155.

[15] [15] ZOU W,ZOU X C,REN D M,et al.2.49-4.91 GHz wideband VCO with optimised 8-shaped inductor［J］.Electronics Letters,2019,55(1):55-56.