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The active sub-harmonic mixer also ensure a high degree of isolations, which are −35.8 dB from LO-to-IF and −40.5 dB from LO-to-RF, respectively, at a LO frequency of 17.5 GHz.
The mixer shows a conversion loss of 9.8 dB at 94 GHz, an output P1dB of −14.8 dBm at LO frequency of 94.542 GHz, and LO-to-RF isolations of 29.5 39.5 dB at 94 100 GHz.
By suitable adjustments of LO phase and amplitude, optical sidebands with spacing of 8 times the input LO frequency is generated.
This had been potentially confusing when both receivers were tuned to the same LO frequency.
The fabricated active sub-harmonic mixer used second harmonic signals of a low local oscillator (LO) frequency.
We showed that the highest conversion gain of 4.8 dB has obtained at a LO frequency of 17.5 GHz and a RF frequency of 40 GHz.
Similar(46)
Carrier frequency offset (CFO) is caused by the Doppler effect of the channel and the difference between the transmitter and receiver local oscillator (LO) frequencies.
In this case, the decreasing LO mode frequency is stronger than that observed for the Ga1−xMn x As alloys.
The only reported Te-related Raman feature above CdTe LO phonon frequency is the bond-stretching vibration of the crown-like Te8 ring at 182 cm-1[50], which is also observed in a-Te.
Numerous studies have revealed a high-LOH frequency on 8p22-p23 in HCC [ 7, 9, 17, 24].
Correlations between LOH/CNV frequencies predicted by the two methods were low (up to r = 0.08).
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