By in-depth research on RF measurement error,especially in high power measurement,the mechanism of the error caused by mismatch between power source and load is analyzed in detail theoretically.
According as the increasing requirement of ATS, all kinds of bus develop at full speed. The CPCI/PXI, VXI and LXI are preponderant in high-speed and high performance module instrument especially in digital instrument, but it is inaccessible to complex and traditional measurement equipments and instrument, such as microwave and RF measurement and test instrument, which still be tested by instruments with rack-and-stuck instrument.
and why RF measurement technology have more advantages than other traditional methords. then introduce the principle of a new type RF probe—FS Duotrac RF probe,and its computer control.
This paper introduces a single cell re-entrant cavity and its cathode structure used in the thermionic microwave gun. The essential parameters of the cavity are chosen according to the requirements of produced electron beam. We report design consideration on cavity shape, field distribution, resonant. frequency and coupling coefficient. Then we give the cold RF measurement results. The cavity is successfully used in the gun. Results of simulations is presented and is compared with measurement...
BPM system is essential for the operation of SASE FEL facilities. Among various types of BPMs, such as the button-type BPM or the stripline-type BPM, only the cavity BPM has the potential to achieve a higher beam position resolution. The amplitude of the TM110-mode excited by an off-center beam in the BPM cavity yields a signal proportional to the beam displacement and to the bunch charge; and the signal phase gives the direction of the displacement. This paper discusses the fundamental characteristics of c...
When boiling sugar in batch vacuum pan.with the increasing of the syrup concentration,the electrical property of syrup would change either.and there in ralationgship between the changes.using this principle,we can measure the complicated syrup concentration.The radio frequency capacitance method is a new method measuring syrup concentration,This text mainly introduce the principle of syrup concentration measurement.and why RF measurement technology have more advantages than other tradition...