摘要:
A slot antenna according to the present invention includes: a ground conductor 12 provided on a rear face side of a dielectric substrate 101, the ground conductor having a finite area; a slot 14 which recesses into the ground conductor 12, beginning from an open-end point on a side edge of the ground conductor 12; and a feed line 261 for supplying a high-frequency signal to the slot 14, the feed line 261 intersecting the slot 14. At a first point near the slot, the feed line 261 branches into a group of branch lines including at least two branch lines, such that at least two branch lines in the group of branch lines are connected to each other at a second point near the slot to form at least one loop line 209. A maximum value of a loop length of each loop line 209 is prescribed to be less than 1×effective wavelength at an upper limit frequency of an operating band of the slot antenna. In the group of branch lines, any branch line that does not constitute a part of the loop line 209 but terminates with a leading open-end point has a branch length which is less than a ¼ effective wavelength at the upper limit frequency of the operating band.
摘要:
A differential transmission line according to the present invention includes: a substrate 101; a ground conductor layer 105 formed on a rear side of the substrate 101; and a first signal conductor 102a and a second signal conductor 102b disposed in parallel to each other on a front side of the substrate 101. The first signal conductor 102a and the ground conductor layer 105 compose a first transmission line, whereas the second signal conductor 102b and the ground conductor layer 105 compose a second transmission line. The first transmission line and the second transmission line compose a differential transmission line 102c. The differential transmission line 102c includes a curved region 104a, with a straight region 104b being connected to each end of the curved region 104a. In the ground conductor layer 105 in the curved region 104a, a plurality of slots 106a which are orthogonal to a local transmission direction of signals in the curved region 104a are formed, the slots 106a being connected to one another on the inner side of the curvature.
摘要:
A demultiplexer receives a multiplexed signal, in which a plurality of electrical signals with mutually different frequencies are multiplexed together, and divides the multiplexed signal into the electrical signals. The demultiplexer includes at least one line for propagating the multiplexed signal and a plurality of resonators arranged along the line. The dispersion characteristic of the line has a nonlinear portion, caused by electromagnetic coupling between the line and the resonators, and the phase velocities of the electrical signals which propagate through the line change according to their frequencies.
摘要:
A magnetron that includes a choke coil which is connected at one end to a cathode terminal and at the other end to a capacitor to form an LC circuit. The choke coil is made up of a first core type inductor, a second core type inductor and an air-core inductor, connected to the cathode terminal, all of which are connected in series and where the first and second core type inductors are separated by a 1 mm to 6 mm gap. The first and second core type inductors have a bar like, high-frequency absorbing member located within their respective windings.
摘要:
In an organic electroluminescent element in which a light emitting layer is disposed between a hole injection electrode and an electron injection electrode, and a hole injection layer is provided between the hole injection electrode and the light emitting layer, and an electron transport layer is provided between the electron injection electrode and the light emitting layer, the organic electroluminescent element is characterized in that a fluorocarbon layer is provided between the hole injection layer and the light emitting layer, and the electron transport layer is formed from a phenanthroline compound.
摘要:
An RF circuit component according to the present invention includes a waveguide 1 and at least one resonator 2, which is arranged inside the waveguide 1. The resonator 2 includes at least one patterned conductor layer, which is parallel to a plane that crosses an H plane, and resonates at a lower frequency than a cutoff frequency, which is defined by the internal dielectric constant, shape and size of the waveguide 1, thereby letting an electromagnetic wave, having a lower frequency than the cutoff frequency, pass through the inside of the waveguide 1.
摘要:
According to the present invention, provided is a high-frequency circuit having a high-frequency functional element mounted on a dielectric substrate, which comprises: a first transmission line formed in the high-frequency functional element; a second transmission line having a characteristic impedance lower than or equal to 50Ω and formed on the dielectric substrate; a wire for connecting between the first transmission line and the second transmission line; a third transmission line having a characteristic impedance higher than 50Ω and connected to the second transmission line; a via hole section which is formed so as to pass through the dielectric substrate and in which a top side conductive land is connected to the third transmission line; and a fourth transmission line connected to a bottom side conductive land of the via hole section.
摘要:
A data distribution apparatus installed in a data center transmits data to a data acquisition apparatus installed in a store via a communication network. The data acquisition apparatus receives authentication information, such as the fingerprint, ID card or the like of a user, for user authentication, and the data distribution apparatus authenticates the user according to the authentication method selected from among multiple authentication methods and corresponding to the authentication information received by the data acquisition apparatus. The data distribution apparatus transmits data changed in format according to the authentication method used to the data acquisition apparatus. In the case of an authentication method being high in security, data is made changeable, and in the case of an authentication method being lower in security, data is changed so as to have an unchangeable format, whereby the unauthorized use of data is prevented.
摘要:
A high-frequency circuit is formed on a multilayered dielectric substrate 1 having at least two conductive circuit layers. The high-frequency circuit includes: a first spiral conductive strip 4 formed in the first conductive circuit layer, the first spiral conductive strip having at least one turn; and a second spiral conductive strip 5 formed in a second conductive circuit layer which is different from the first conductive circuit layer, the second spiral conductive strip having at least one turn and not being in electrical conduction with the first spiral conductive strip. The first spiral conductive strip and the second spiral conductive strip, located at different levels, overlap each other. The first spiral conductive strip has a rotating direction opposite to a rotating direction of the second spiral conductive strip.
摘要:
A disk drive for recording information on and reproducing information from a hard disk drive. The CPU of a host device controls the maximum allowable number of retries, or the maximum period of time allowed for retries, performed by the disk drive when an error occurs in a seek, record, or reproduce operation.