| dc.description.abstract | This thesis investigates millimeter-wave mixer, oscillator and theirs correlated passive circuits. The topology of mixer is resistive type with the center frequency of 28GHz. The topology of local oscillator is cross-coupled scheme and its negative resistance is designed to compensate the loss of tapped resonator with the center frequency of 43GHz. Then the signal can be taken out by standing wave mode. These active circuits are implemented with WIN 0.15μm pHEMT. The millimeter-wave resonators and filters are fabricated with Al2O3 thin film process. The λ/4 shunt and series matching stubs are intentionally placed inside the center conductor to reduce the size and insertion loss of CPW filter. The λ/2 ring resonators replace the conventional rectangular resonators to reduce the size. The measured results of millimeter-wave circuits are as follows; for the sub-harmonic mixer, conversion loss is 12 dB, input power at the 1-dB gain compression point is 9 dBm, isolations among all ports are greater than 30dB; for the standing wave voltage-controlled oscillator, the operating frequency is 43 GHz, the phase noise is -101 dBc/Hz at 1MHz offset frequency, output power is 6 dBm, tuning range is 1 GHz; for the millimeter-wave band pass filter, insertion loss is smaller than 3dB, return loss is larger than 15dB, size is reduced to 35﹪, bandwidth is 10 GHz; for the CPW shunt short stub, insertion loss is smaller than 3dB, return loss is larger than 9dB, size is reduced to 25﹪, bandwidth is 5.7 GHz; for the CPW shunt open stub, insertion loss is larger than 15dB, return loss is smaller than 1dB, size is reduced to 25﹪, bandwidth is 7 GHz;for the CPW feed ring resonator, insertion loss is larger than 15dB, return loss is smaller than 2.5dB, bandwidth is 10 GHz; for the slotline feed ring resonator, insertion loss is larger than 14dB, return loss is smaller than 2.5dB, bandwidth is 1.5 GHz. | en_US |