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MMIC Cascade VCO with Low Phase Noise in InGaP/GaAs HBT Process for Ku-Band Application  

Shrestha Bhanu (Dept. of Electronic Engineering, Kwangwoon University)
Lee Jae-Young (Dept. of Electronic Engineering, Kwangwoon University)
Lee Jeiyoung (Dept. of Electronic Engineering, Kwangwoon University)
Cheon Sang-Hoon (Knowledge on Inc.)
Kim Nam-Young (Dept. of Electronic Engineering, Kwangwoon University)
Publication Information
Journal of electromagnetic engineering and science / v.4, no.4, 2004 , pp. 156-161 More about this Journal
Abstract
The MMIC cascode VCO is designed, fabricated, and measured for Ku-band Low Noise Blcok(LNB) system using InGaP/GaAs HBT technology. The phase noise of -116.4 dBc/Hz at 1 MHz offset with output power of 1.3 dBm is obtained at 11.526 GHz by applying 3 V and 11 mA, which is comparatively better characteristics than compared with the different configuration VCOs fabricated with other technologies. The simulated results of oscillation frequency and second harmonic suppression agree with the measured results. The phase noise is improved due to the use of the smallest value of inductor in frequency determining network and the InGaP ledge function of the technology. The chip size of $830\time781\;{\mu}m^2$ is also achieved.
Keywords
HBT VCO; MMIC VCO; LC VCO; InGaP/GaAs VCO; LC Oscillator; Low Phase Noise VCO;
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