Design of High-Q Tunable SIW Resonator and Its Application to Low Phase Noise VCO

Author

Zhe Chen ; Wei Hong ; Jixin Chen ; Jianyi Zhou

Author_Institution

Dept. of Radio Eng., Southeast Univ., Nanjing, China

Volume

23

Issue

1

fYear

2013

fDate

Jan. 2013

Firstpage

43

Lastpage

45

Abstract

In this letter, a low-cost continuously tunable substrate integrated waveguide (SIW) resonator and a low phase noise SIW voltage-controlled oscillator (VCO) are presented. A simple new structure for coupling varactor to the SIW cavity is proposed, which realizes a simple circuit layout for the tuning resonator. Equivalent circuit model is given for the varactor coupled resonator. Relation between the coupling coefficient and the relative tuning bandwidth is analyzed. Prototypes of tunable SIW resonator and a low phase noise SIW VCO have been designed and fabricated. Measured results show that the proposed resonator possesses unloaded Q factor of 286-299 for a tuning range of 492 MHz, and the phase noise of the SIW VCO is -93 --95.6 dBc/Hz at 100 kHz offset for the whole oscillating frequency range of 455 MHz at X-Band.

Keywords

Q-factor; equivalent circuits; resonators; substrate integrated waveguides; varactors; voltage-controlled oscillators; SIW cavity; SIW voltage-controlled oscillator; circuit layout; continuously tunable substrate integrated waveguide resonator; coupling varactor; equivalent circuit model; frequency 100 kHz; frequency 455 MHz; frequency 492 MHz; high-Q tunable SIW resonator; low phase noise VCO; tuning resonator; varactor coupled resonator; Cavity resonators; Couplings; Integrated circuit modeling; Phase noise; Tuning; Varactors; Voltage-controlled oscillators; Quality factor; substrate integrated waveguide (SIW); tunable resonator; voltage-controlled oscillator (VCO);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2012.2234088

Filename

6392224