A 1.35-2.12-GHz Constantly Low-Phase-Noise VCO Based on Constant ABW Quasi-Elliptic BPF

被引：7

作者：

Li, Zhiyou ^{[1
]}

Tang, Xiaohong ^{[1
]}

Lu, Di ^{[2
]}

Cai, Zongqi ^{[1
]}

Liu, Yong ^{[1
]}

Luo, Junxin ^{[3
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Elect Sci & Engn, Chengdu 611731, Sichuan, Peoples R China

[2] Chinese Univ Hong Kong, Hong Kong, Peoples R China

[3] Y&D Elect & Informat Co Ltd, Shenzhen 518057, Peoples R China

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2019年 / 29卷 / 07期

关键词：

Constant absolute bandwidth (CABW); element-variable coupling matrix (EVCM); four-pole quasi-elliptic tunable bandpass filter (BPF); low phase noise; wideband voltage-controlled oscillator (VCO); OSCILLATOR; DESIGN; BAND;

D O I：

10.1109/LMWC.2019.2916812

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this letter, a constantly low-phase-noise voltage-controlled oscillator (VCO) with wide frequency tuning range (FTR) (44.4%) is presented. The presented VCO is based on a four-pole tunable bandpass filter (BPF) with quasi-elliptic frequency response and constant absolute bandwidth (CABW). Because the four-pole quasi-elliptic BPF is used, the low phase noise of the VCO is obtained, and because the CABW of the filter is kept within a wide FTR, the low phase noise is maintained over the wide FTR. Based on this concept, a demonstrative VCO is designed and measured. The oscillation frequency of the demonstrative VCO is able to be tuned from 1.35 to 2.12 GHz (44.4%) and the phase noise keeps better than -101.3 dBc/Hz at 100 kHz and -127.8 dBc/Hz at 1 MHz over the FTR.

引用

页码：480 / 482

页数：3

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