Dual-band-rejection filter for distortion reduction in RF transmitters

EUV light source by high power laser

“…In order to suppress the neutral debris the use of so-called "minimummass target" is highly desirable, where a target contains minimum number of tin atoms necessary for EUV emission at high conversion while minimizing the generation of neutral debris. We have evaluated the minimum mass of tin required for sufficient EUV emission [1], and proposed two kinds of minimum-mass targets [2], a tin droplet target with double pulse irradiation and "punch-out target" [3]. Even if the minimum-mass target is realized, the fast ions are still dangerous.…”

Multiple-band waveguide based band-stop filter

“…It is due to two facts: Firstly, as stopband bandwidth decreases for a bandstop filter, circuit element produces unreliable values which are very complex. Secondly the circuit losses, the finite Q of the resonators severely degrades the stopband attenuation level and increases the leakage during stop band period [20,21]. It is possible to give the highest value of Q using twin resonator design, which is found to be the easiest to tune of all the designs due to the lack of inter digital capacitors (At resonance the power coupled from the resonator at the output is equal to the on power and is 180 • out of phase with the signal exiting the thru-line therefore a perfect match is produced) [22][23][24].…”

Compact dual-band open-stub bandstop filter with suppression of spurious passbands

“…Recently, a few dual-band BSFs have been proposed (Uchida et al 2004;Tu and Chang 2006;Chin, Yeh and Chao 2007a,b;Ma, Kikuchi, Kobayashi, Anada and Hagiwara 2007;Guntupalli and Sanyal 2008;Chiou and Tai 2009;Lung, Chin and Fu 2009;Velidi, Guntupalli and Sanyal 2009;Wong, Chiu and Xuea 2009). To obtain dualband BSFs the following methods were proposed: in Wong et al (2009) by two different transmission lines, in Uchida et al (2004) by quarter-wavelength short-circuited stubs, in , Velidi et al (2009, Ma et al (2007, Lung et al (2009) and Guntupalli and Sanyal (2008) by stepped-impedance open-circuited stubs, in Chiou and Tai (2009) by dual-mode loop resonator, and in Tu and Chang (2006) by Tshaped transmission lines. Figure 1 shows a schematic diagram of the conventional open-stub BSF.…”