Dual coupled X-band VCO using Microstrip square multiple spiral resonator for composite metamaterials

초록

A novel voltage controlled oscillator (VCO) using the microstrip square multiple spiral resonator for reducing the phase noise of VCO. Compared with the conventional microstrip square spiral resonator, the microstrip square multiple spiral resonators has strong coupling between the microstrips of the line with the multiple spiral resonator, which makes for a high Q value of the resonator. The phase noise and the tuning range of the proposed VCO are -115.0 ∼ -117.34 dBc/Hz at 100 kHz and 8.935 ∼ 9.4 GHz. Transmission and reflection properties of metamaterials composed line and square spiral have been simulated and compared with conventional metamaterials. The center frequency and transmission bandwidth of metamaterials have been varied through tuning of spiral resonator. ©2009 IEEE.