| Summary: | 碩士 === 國立交通大學 === 電機學院碩士在職專班電子與光電組 === 95 === UWB (Ultra-Wideband; Ultra wide band) is a kind of wireless communication technology of short distance of transmitting the materials with low power, at a high speed; utilize ps or ns non- sinusoidal wave narrow pulse to Transmission. Because the transfer rate of the wireless communication system requires higher and higher at present, for example: data rate of Bluetooth require 1MHz/bps, date rate of WLAN probably 54MHz/bps. But look like IEEE 1394 cables in some products; 3G cell phones; date rate of print and external storage devices is in several hundred Mbps, and data rate of UWB is from 55 to 480Mbps, high products of Date Rate its range of application can very wide to suffused. In addition, frequency band very wide to transmit power very much little, anti-interference very capable. According to synthesize the above characteristic, so the structure of UWB will just be arisen. So already some UWB frequency synthesizer has been made successfully with CMOS process. But except this circuit has intact for frequency range (3432MHz~10032MHz) and low power consumption (55.1mW~161.62mW), the rest are issued and only stopped in the frequency range of a part and high power consumption. This because in frequently wide to after exceeding 6~7 GHz, is it still have sure difficulty in transceiver to combine CMOS mainly. This thesis is explained and according to 802.15.3 a which the international electronic electrical machinery society make in an ultra wide-band frequency synthesizer design method to apply 3~10 GHz and manufacturing technology. It is a subject by the phase lock loop circuit that negative feedback a new structure in the thesis, the frequency synthesizer is composed of a phase frequency detector, a charge pump, a loop filter, a VCO, a VCO buffer, four poly phase filter, three SSB mixer, five CML divider, two band selector be make up. Can receive the frequency band (10032MHz of 3432MHz) that the whole frequency synthesizer need, and combine in the single chip. On chip design, a 1.5V 3~10GHz frequency synthesizer, make with 0.18um 1P6M CMOS process finish. Under the voltage of operation of 1.5V, power consumption is 55.1~161.62mW, the area of the chip is 1900μm * 1900μm.
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