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A Design and Fabrication of 120 GHz Local Oscillator  

Lee, Won-Hui (ETRI)
Chung, Tae-Jin (ETRI)
Publication Information
The Journal of the Institute of Internet, Broadcasting and Communication / v.10, no.6, 2010 , pp. 71-76 More about this Journal
Abstract
In this paper, a 120 GHz local oscillator(LO) for the sub-harmonic mixer in the THz transceiver with a carrier frequency of 240 GHz was designed and fabricated. A 120 GHz local oscillator was composed of 40 GHz PLL(Phase Locked Loop), 40 GHz BPF(Band Pass Filter), frequency tripler and 120 GHz BPF. The commercial model of the frequency tripler was used. The measured result of the 40 GHz PLL showed the phase noise of -105 dBc/Hz at the 100 kHz offset frequency. The measured result of 120 GHz BPF showed the insertion loss of 1.3 dB at center frequency of 119 GHz with bandwidth of 5 GHz. The output power of 120 GHz LO was measured to 6.6 dBm.
Keywords
Local oscillator; Sub-harmonic mixer; PLL; Frequency tripler; BPF;
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