A 540-640-GHz high-efficiency four-anode frequency tripler

A New Scheme for the Design of Balanced Frequency Tripler With Schottky Diodes

“…1 [4]. An E-plane probe located in the input waveguide couples the TE10 mode signal at the fundamental frequency to the suspended stripline.…”

“…Equation (4) implies that only odd harmonics present at the output of the diodes. Among them, the fundamental frequency is cut off by the output waveguide, the higher order harmonics are small enough to be ignored.…”

“…Millimeter-wave and submillimeter-wave frequency multipliers [1][2][3][4][5][6] and mixers [7][8][9][10][11][12][13][14] based on planar Schottky diodes are widely used for atmosphere and space detection. The multipliers are usually driven by an oscillator [15][16][17][18] or a phase-locked millimeter-wave source.…”

“…The balanced frequency multipliers, mostly the frequency doublers and frequency triplers, usually have two arms of the diodes [1][2][3][4][5][6]. The early multiplers usually employ only two diodes, with each diode in one arm limited by the chip process at that time.…”

“…The performance of the tripler designed with Schottky diode is superior to the one designed with HBVs at millimeter-wave and submillimeter-wave frequency with higher output power and efficiency. In the commonly used balanced tripler scheme [4,6], all diodes are in series connection, with one arm connected to the metal channel and the other arm RF grounded by a chip capacitor for the bias line as shown in Fig. 1.…”