電子信息工程專業(yè)外文翻譯----一個(gè)高效率的cmos超寬帶信號(hào)產(chǎn)生模塊-電子信息-資料下載頁
2025-05-11 20:51本頁面
【導(dǎo)讀】它增強(qiáng)了射頻功率效率，降低了直流功率的損。耗和電路的復(fù)雜性。mCMOS工藝實(shí)現(xiàn)，超寬帶信號(hào)生成模塊包括一個(gè)。超寬帶SPST開關(guān)和一個(gè)可調(diào)脈沖發(fā)生器。測(cè)量結(jié)果表明，產(chǎn)生10dB可變的超寬帶信號(hào)，CMOS模塊直流功耗小于2mW。頻段中無牌使用超寬帶設(shè)備的調(diào)查與整治。超寬帶技術(shù)是有前途的技術(shù)，它的。能力包括準(zhǔn)確的定位和高效短距離點(diǎn)對(duì)點(diǎn)網(wǎng)絡(luò)以及高分辨率遙感。載波超寬帶信號(hào)已廣泛應(yīng)用于各種雷達(dá)和通信系統(tǒng)中。通過天線它們擁有更加方便的。頻譜管理和減少失真的優(yōu)勢(shì)。被發(fā)射到一個(gè)寬帶功率放大器，從而獲得達(dá)到所需的功率水平。同時(shí)文章論證了新的CMOS發(fā)射機(jī)模塊性能可操作性和性能，頻率覆。偏置電阻的使用代替RF扼流圈從而使得芯片面積最小。測(cè)試結(jié)果表明，在整個(gè)超寬帶帶寬之間，該。這表明通過先進(jìn)的CMOS芯。這項(xiàng)工作得到美國國家科學(xué)基金會(huì)和美國陸軍工程兵團(tuán)的資助，在此一并感謝。
【正文】 tor and the SPST switch. (a) displays the timedomain waveform of a UWB signal with 2ns duration and 5 GHz center frequency. The signal amplitude is 2Vpp (peakto peak). By increasing the external biasing voltage for the pulse generator, the pulse width of the UWB signal can be reduced. When the pulse width is reduced to a certain value, the amplitude of the UWB signal, however, diminishes due to the fact that the SPST switch cannot be pletely turned on any more. When the pulse duration is reduced to ns, the according signal amplitude drops to 1Vpp. Fig. 5(b) shows the measured spectrums of different UWB signals, obtained by varying the carrier frequency, demonstrating that the entire UWB band of GHz can be achieved with the developed CMOS chip by using a multiband signal source. To evaluate effects of coupling from the impulse signal applied to the SPST’s control terminals, we removed the LO input signal and directly observed the coupled signal at the output. The measured spectrum of the coupled signal shows it is mainly distributed below 1 GHz, signifying that the signal is out of the UWB band and can be easily removed using a filter. Fig. 5. (a) Measured timedomain UWB signal with duration. (b) Measuredspectrums of UWB signals covering the GHz UWB band. 6. Conclusions We have introduced a new carrierbased UWB transmitter architecture that is suitable for both UWB radar and munications. The newly proposed UWB transmitter is simple and implements two switching stages to conserve RF power, reduce power consumption, and enhance switching and isolation. The implemented CMOS transmitter module produces UWB signals of different bandwidths ranging from to 4 GHz. By varying the LO frequency, the signal spectrum’s center frequency can be shifted to any frequency within the UWB band of GHz. Measurement results confirm the workability of the new transmitter as another simplified approach for carrierbased UWB signal generation. Acknowledgement This work was supported in part by the National Science Foundation and in part by the US Army Corps of Engineers.
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