摘要:
An ultrasound probe and a method for manufacturing the same are provided. More particularly, a one-dimensional or two-dimensional ultrasound probe having a multi-element-type piezoelectric material is easily manufactured by inserting a flat wire in a backing material, wherein the flat wire is used as a signal cable to supply electrical signals, enabling easy and simple arrangement of piezoelectric units as well as the signal cable.
摘要:
There is herein disclosed a multi-band antenna which can adjust respective frequency bands independently. The multi-band antenna comprises a first radiation element having a PIFA structure and a second radiation element having a monopole structure. Also, a second ground terminal is disposed at one end of the first radiation element so as to be connected to a ground plane through a capacitor. The adjustment of the capacitance enables an independent adjustment of a first frequency band. The second radiation element includes a stub so as to allow the second frequency band to be independently adjusted, and a first sub-element and a second sub-element which defines a slit therebetween so as to allow the third frequency band to be independently adjusted. According to the present invention, it is possible to provide a multi-band antenna which can easily adjust respective frequency bands using multi-bands.
摘要:
The present invention relates to a power divider and a power combiner employing dual band-Composite Right/Left-Handed (CRLH) transmission lines. A power divider including an input terminal and two output terminals according to the present invention includes two transmission lines each having two terminals connected to the input terminal and the output terminals, respectively, and two short-stubs having one terminals connected to the output terminals, respectively, and the other terminals connected to grounds. The transmission line may employ a first dual band-CRLH transmission line having a double value of a termination impedance, which is substantially connected to the output terminal, as a characteristic impedance, and the short-stub may employ a second dual band-CRLH transmission line, which has substantially the same value as that of the termination impedance as a characteristic impedance. The first dual band-CRLH transmission line and the second dual band-CRLH transmission line generate phase delay of 90 degrees in a high frequency band and phase delay of −90 degrees in a low frequency band with respect to an input signal.
摘要:
The invention relates to built-in antenna. Specifically, a multi-band built-in antenna having plurality of resonant frequencies and a method for adjusting resonant frequencies are provided, wherein resonant frequencies are able to be adjusted independently without affecting one another, for each resonant frequencies are adjusted separately through separate radiating elements.
摘要:
A single-layer dual-band antenna with circular polarization is disclosed. The antenna includes a first radiator formed on the top surface of a substrate and electrically coupled to a feeding element, and a second radiator formed on the top surface of the substrate, spaced apart from the first radiator by a predetermined distance and electromagnetically coupled with the first radiator. The antenna is thin because it has a single-layer structure. Furthermore, there is no deterioration in the radiation characteristic due to interference between the radiators. Moreover, impedances of the radiators can be independently matched at their frequency bands by adjusting the position of a feed point and the relative position of the radiators.
摘要:
The present invention relates to rounded blade scissors. The rounded blade scissors according to one embodiment of the present invention comprise: a first cutting portion including a first cutting blade bent in one direction to cut a target; a second cutting portion including a second cutting blade having a closed annular or polygonal shape to surround the surface of the first cutting portion; a first frame portion supporting the first cutting portion on one side of the first cutting portion; a second frame portion supporting the second cutting portion on one side of the second cutting portion; and a coupling portion that hingedly couples the first frame portion with the second frame portion so that the first cutting portion comes into contact with the second frame portion through rotation. Therefore, the cutting can be performed in a safe and effective manner. According to the present invention, the cutting target can be cut in an easy, convenient, and safe manner.
摘要:
The present invention provides an RF switch, including a diode adapted to operate as a switch when a control current is applied thereto, a first CRLH transmission line of a Φ degree phase, which provides one signal transfer path from a terminal 1 to a terminal 2 when the diode is shorted due to application of a control current, and a second CRLH transmission line of a Φ-180 degree phase, which has a 180 degree phase difference from that of the first CRLH transmission line and provides the other signal transfer path from the terminal 1 to the terminal 2. The present invention provides an RF switch having a broad-band characteristic by employing a CRLH transmission line. More specifically, the present invention provides a ring-shaped RF switch, which has a broad-band characteristic and can also be miniaturized at a low frequency band, by employing a CRLH transmission line having a 180 degree phase difference in a broad band.
摘要:
The invention relates to built-in antenna. Specifically, a multi-band built-in antenna having plurality of resonant frequencies and a method for adjusting resonant frequencies are provided, wherein resonant frequencies are able to be adjusted independently without affecting one another, for each resonant frequencies are adjusted separately through separate radiating elements.
摘要:
The present invention relates to brushing the teeth, and more particularly, to a method for moving a toothbrush in a top down manner for the upper teeth and in a bottom up manner for the lower teeth. For this purpose, the mechanical toothbrush of the present invention is configured such that a handle of the toothbrush is closed/opened similar to one exercising with a hand gripper (an exercise tool for increasing grip strength), so as to convert the linear motion of a rack gear into a rotating motion, and thus enable the toothbrush to rotate from 0 to 180 degrees, and the rotating direction of the toothbrush can be changed using the rack gear and a rotation-converting frame. A tension spring is connected to a rotating shaft such that a toothed wheel of the rotating shaft is prevented from escaping from the rack gear, and the rotating shaft is fixed at the rotation-converting frame. The handle and the rack gear return to the original positions thereof by means of the elasticity of a torsion spring. A toothbrush-fixing frame enables the toothbrush to be conveniently replaced, and supports the toothbrush such that the toothbrush does not vibrate.
摘要:
The present invention relates to a transmission line in which a physical value of an inductive element can be changed in various ways while minimizing a size. The transmission line of the present invention includes a transmission unit, a ground unit and inductive elements. The inductive element connects the transmission unit and the ground unit, and has a predetermined pattern. The inductive element is provided between two surfaces of a substrate. According to the present invention, a physical value of the inductive element, in particular, an inductance value can be changed in various ways while not increasing an overall size. Accordingly, a transmission line can be designed freely according to its application.