| Summary: | 碩士 === 國立中央大學 === 電機工程研究所碩士在職專班 === 98 === The work in this thesis focuses on Ka-band active array antenna and Ku-band RF receiver front-end circuits. The active array antenna uses Rogers RO5880 substrate to integrate the low noise amplifier (LNA) and power amplifier (PA), then assemble them to the metal housing. The LNA and PA were designed and fabricated in tsmc 0.18 ?m CMOS technology. The designed circuits include 28 GHz common source wideband LNA, Ku-band CPW LNA with transformer feedback technique. A 27.1 GHz transformer feedback voltage control oscillator is also designed and demonstrated.
The active antenna array design includes Wilkinson power divider, angled-dipole antenna, angled-dipole antenna array and active antenna array which integrate previous mentioned LNA and PA.
The thesis further addresses Ka-band RF receiver front-end circuits. The 28 GHz common source wideband LNA was implemented using inductive source degenerated topology. The LNA achieved a gain of 12.6 dB, a 3-dB bandwidth of 8 GHz and the input /output return losses of more than 8.3 dB , a noise figure of 4.87 ~ 6.55 dB between 22 ~ 30 GHz. The Ka-band CPW LNA using transformer feedback technique achieved a gain of 15.11 dB, input return losses of more than 12 dB, output return loss of more than 7 dB, a noise figure of 5.87 dB. The 27.1 GHz transformer feedback voltage controlled oscillator utilized the transformer to lower the phase noise. This VCO obtained a tuning range of 700 MHz, an output power of -17dBm, and the phase noise of -93.27 dBc/Hz at 1 MHz offset.
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