Fig. 3: Measured and analytical results of the qHT.
From: Passive frequency comb generation at radiofrequency for ranging applications
a Circuit schematic of the qHT built in this work. b, c Measured (in blue) and numerically predicted (in red) output spectrum of the qHT built in this work for two different input power levels. d Measured (in blue) and numerically predicted (in red) frequency \({f}_{{out}}\) for the first two tones around half of the adopted interrogation frequency (836 MHz) generated by the built qHT for different input power levels. The inductors \({L}_{1},{L}_{2},{L}_{3}\) and \({L}_{{out}}\) were selected to have inductances equal to 61 nH, 63 nH, 36 nH and 3.6 nH, respectively. The capacitors \({C}_{1},{C}_{2},{C}_{3}\) and \({C}_{{out}}\) were selected to have capacitances equal to 2.3 pF, 0.6 pF, 2.3 pF and 103 pF, respectively.
