.14/56ghz The Mmics Four Multiplier Study

The technology of Monolithic Microwave Integrated Circuit (MMIC) progresses increasingly with the development of microwave circuits and semiconductor material. Base on a series of merits of small size, light quality, high reliability and good capability of anti-jamming, MMIC is used in military electronic warfare, radar, broadband communication and intelligent traffic system and so on. The application of MMIC is everywhere from military affairs to commerce.Frequency multipliers can make the oscillate frequency of electron equipments lower. It can solve the problem of crowded operation frequency in microwave band. It is also an important part of frequency synthesizers. Monolithic frequency multipliers not only have the function and characteristics mentioned above, but also have merits of MMIC. Comparing with Hybrid Microwave Integrated Circuit (HMIC) frequency multipliers, MMIC frequency multipliers are popular in modern millimeter wave high frequency communication systems.Based on 0.15um GaAs PHEMT MMIC process, design a chip of 14/56GHz MMIC quadrupler by Advanced Design System (ADS) simulation software is the main task of the thesis. The MMIC quadrupler uses active multiple scheme to improve conversion gain. Its configuration is based on single-ended one-stage that can effectively make the chip size smaller. Rejection of the fundamental and the undesired harmonic in the MMIC quadrupler are quarter wavelength microstrip open stubs.When power of input signal is 3.5~5dBm, the conversion gain of the MMIC quadrupler is -4.6±0.4dB, the maximum conversion gain is -4.2dB. When input frequency is 14±0.5GHz,the 3 dB bandwidth of 7.1% is obtained which the center frequency is 56GHz. The rejection of fundamental is larger than 30 dBc and rejection of unwanted harmonic is more than 25 dBc for second harmonic and more than 27 dBc for the third. The chip size of the MMIC quadrupler is 1.5mm by 1.2mm. The designed MMIC quadrupler meets the anticipate targets and it will be used in 60GHz millimeter wave frequency synthesizers to heighten operation frequency. It is characteristic of the thesis that designing a chip of 14/56 GHz MMIC quadrupler with advanced 0.15 um GaAs PHEMT MMIC process. The research of V-band MMIC millimeter wave quadrupler had not been reported in our country. The research work of the thesis will help to the development of millimeter wave MMIC frequency multipliers in our country.