摘要:
A bandpass filter is capable of forming attenuation extremes on both sides of a passband. Multiple microstrip line resonators, one end of each being an open terminal and the other end connecting to a ground electrode, are provided in a row, and the inner microstrip line resonators are bent in a C-shape so that the open terminals of the outer microstrip line resonators project further than the inner microstrip line resonators. The line of sight between the open terminals of the microstrip line resonators is improved and capacitance is formed there, so that attenuation extremes can be formed on both sides of the passband, and the amount of attenuation can be increased.
摘要:
The invention provides a high frequency filter which can facilitate filter-characteristic adjustments and miniaturization and can obtain an excellent broadband characteristic. In addition, the invention provides a filter device using the high frequency filter, and an electronic apparatus incorporating the same. In this filter, a ground electrode is arranged on one of the main surfaces of a dielectric substrate. On the other main surface thereof there are arranged two or more microstrip lines, and one end of each microstrip line is grounded via a through-hole to form a high frequency filter. The microstrip lines and the shared through-hole constitute microstrip line resonators, which are coupled via the inductance of the through-hole. With this arrangement, there is no need for an additional coupling element. Thus, the size of the high frequency filter can be reduced. Furthermore, since a large coupling coefficient can be obtained, the high frequency filter can have a broadband characteristic.
摘要:
In four microstriplines disposed close such that they are coupled with each other, the left-hand end of the third microstripline serves as an input, the left-hand ends of the first and second microstriplines and the right-hand ends of the first and fourth microstriplines serve as outputs, and the right-hand end of the second microstripline and the left-hand end of the fourth microstripline are grounded.
摘要:
First and second microstriplines disposed substantially in parallel to each other and coupled with each other are formed spirally in a substantially quadrangular shape with the first microstripline being disposed inside. The space between the first and second microstriplines is set at least partly wider than the space between the adjacent turns of the pair of first and second microstriplines.
摘要:
An unbalanced-to-balanced converter (balun) comprising three distributed-constant lines. In one distributed-constant line, a standing wave is generated. Disposed adjacent thereto is another distributed-constant line to which the power of the standing wave is transferred. A signal input to the unbalanced-to-balanced converter is divided into two signals having phases 180 degrees apart and the same level.
摘要:
In a coupled line, microstrip lines are formed so as to be arranged with a spacing that is narrower than the smallest possible space that is obtainable with a conventional electrode forming process, on a top side thereof spaced away from a dielectric substrate. The microstriplines have a trapezoid-shaped cross-section with the narrower major surface at the bottom, in contact with the dielectric substrate. Such formation makes it possible to strengthen the coupling between the microstrip lines, and to reduce the conductor loss of the microstrip lines.
摘要:
A line width on the grounded side of distributed-constant-line-type resonators which form a distributed-constant-line-type filter is made wider than a line width on the open side. By increasing the line width on the grounded side, where a larger electric current flows, of a distributed-constant-line-type resonator, the line resistance of the distributed-constant line decreases, making it possible to reduce the loss of the distributed-constant-line-type resonator and further to reduce the insertion loss of the distributed-constant-line-type filter. Further, by decreasing the line width on the open side to less than the line width on the grounded side, an increase in the size of the filter because the line width on the grounded side is increased can be prevented.
摘要:
In order to provide a page-turning reader device and a feeder device capable of continuously acquiring image data of each page of a plurality of booklets, the page-turning reader device (1) includes a feeder unit (102) that feeds a plurality of stacked booklets (10) one by one from a lower side; a holder (203) that grips and fixes a binding edge of the booklet (10) fed from the feeder unit (102); an air suction pad (206), an air blow nozzle (207), and a first page-turning bar (204) configured to turn the pages of the booklet (10) one by one while the booklet (10) is fixed by the holder (203); and an image data acquiring means (11) that acquires image data of each page of the booklet (10) using an image pickup camera (106) in synchronization with a turning operation.
摘要:
The present invention provides a filter cloth for a dust collector which shows low pressure loss, no clogging, superior dust shaking-off performance, and durability for continuous use without impairing collection performance, even under such dust collection conditions as high speed filtration and high dust concentration. The filter cloth for a dust collector relevant to the present invention is a filter cloth which is made by laminating and integrating a filtration layer of a nonwoven fabric layer consisting of a thermoplastic fiber and a support layer consisting of a woven fabric layer, characterized in that at least filtration surface layer of said laminated and integrated filter cloth has a concave-convex shape having a height from hill part to trough part of 1.6 to 20.0 mm.
摘要:
A fluorescence microscope 100 includes an illumination optical system 120 that illuminates a sample with excitation light, fluorescence detection optical systems 130, 140 and 150 that detect fluorescence from the sample, optical members 8, 12, 13, 16, 17 and 20 that are disposed on an optical path of the illumination optical system and on an optical path of the fluorescence detection optical system, have different wavelength characteristics with each other, and are included in the illumination optical system and in the fluorescence detection optical system, a memory 23 that stores the wavelength characteristic of each of the optical members, and a display 23a that displays each of the wavelength characteristic read out from the memory on the same frame, and displays fluorescence detection wavelength range of a detectable fluorescent dye added to the sample.