摘要:
A high-frequency package includes a first dielectric substrate having a signal line and a grounding conductor provided on a back side, a high-frequency element connected to a back side of the first dielectric substrate with a first connection conductor therebetween, a second dielectric substrate having a signal line and a grounding conductor provided on a front side facing the back side with the high-frequency element therebetween, and second connection conductors that are arranged so as to surround the high-frequency element and connect the grounding conductor on the back side of the first dielectric substrate and the grounding conductor on the front side of the second dielectric substrate. In the high-frequency package, a dielectric space surrounded by a conductor pattern is formed in the front side of the second dielectric substrate under the high-frequency element.
摘要:
Shielding of high-frequency circuits is achieved using a simple and inexpensive configuration not using any lid. A high-frequency circuit mounting substrate (20) is disposed, on an underside surface layer of which are disposed high-frequency circuits (21 and 22) and is formed a first grounding conductor that has same electric potential as grounding conductors of the high-frequency circuits and that surrounds the high-frequency circuits. A mother control substrate (3) is disposed, on which the high-frequency circuit mounting substrate (20) is mounted in such a way that the high-frequency circuits are sandwiched therebetween and on which a second grounding conductor is formed in a region facing the high-frequency circuits. Plural first lands are formed on the first grounding conductor of the high-frequency circuit mounting substrate (20) to surround the high-frequency circuits. Plural second lands are formed that are electrically connected to the second grounding conductor at positions on a surface layer of the mother control substrate (3) which face the first lands. Plural solder balls (30G2) are disposed for connecting the first lands and the second lands. The high-frequency circuits are housed in pseudo shielding cavities surrounded by the solder balls (30G2), the grounding conductors of the high-frequency circuits, and the first and second grounding conductors.
摘要:
Shielding of high-frequency circuits is achieved using a simple and inexpensive configuration not using any lid. A high-frequency circuit mounting substrate (20) is disposed, on an underside surface layer of which are disposed high-frequency circuits (21 and 22) and is formed a first grounding conductor that has same electric potential as grounding conductors of the high-frequency circuits and that surrounds the high-frequency circuits. A mother control substrate (3) is disposed, on which the high-frequency circuit mounting substrate (20) is mounted in such a way that the high-frequency circuits are sandwiched therebetween and on which a second grounding conductor is formed in a region facing the high-frequency circuits. Plural first lands are formed on the first grounding conductor of the high-frequency circuit mounting substrate (20) to surround the high-frequency circuits. Plural second lands are formed that are electrically connected to the second grounding conductor at positions on a surface layer of the mother control substrate (3) which face the first lands. Plural solder balls (30G2) are disposed for connecting the first lands and the second lands. The high-frequency circuits are housed in pseudo shielding cavities surrounded by the solder balls (30G2), the grounding conductors of the high-frequency circuits, and the first and second grounding conductors.
摘要:
A rectangular conductor pattern is formed around a first waveguide on a multilayer dielectric substrate facing a metal substrate, with an end at about λ/4 away from a long side edge of the first waveguide, where λ is a free-space wavelength of a signal wave. A conductor opening is formed between the end of the conduction pattern and the long side edge of the first waveguide, with a length longer than a long side of the first waveguide and shorter than about λ. A closed-ended dielectric transmission path is formed in the multilayer dielectric substrate in the layer direction, with a length of about λg/4, where λg is an in-substrate effective wavelength of the signal wave.
摘要:
Shielding of high-frequency circuits is achieved using a simple and inexpensive configuration not using any lid. A high-frequency circuit mounting substrate (20) is disposed, on an underside surface layer of which are disposed high-frequency circuits (21 and 22) and is formed a first grounding conductor that has same electric potential as grounding conductors of the high-frequency circuits and that surrounds the high-frequency circuits. A mother control substrate (3) is disposed, on which the high-frequency circuit mounting substrate (20) is mounted in such a way that the high-frequency circuits are sandwiched therebetween and on which a second grounding conductor is formed in a region facing the high-frequency circuits. Plural first lands are formed on the first grounding conductor of the high-frequency circuit mounting substrate (20) to surround the high-frequency circuits. Plural second lands are formed that are electrically connected to the second grounding conductor at positions on a surface layer of the mother control substrate (3) which face the first lands. Plural solder balls (30G2) are disposed for connecting the first lands and the second lands. The high-frequency circuits are housed in pseudo shielding cavities surrounded by the solder balls (30G2), the grounding conductors of the high-frequency circuits, and the first and second grounding conductors.
摘要:
A video reproduction apparatus detects the remaining time of a movie being reproduced and a battery's availability and calculates therefrom power available before reproducing the movie ends, and uses the power as calculated and a table representing a relationship between the liquid crystal display device's screen brightness and power consumption to calculate and set the liquid crystal display device's screen brightness to prevent the battery from running out while the movie is being reproduced.
摘要:
A two-terminal semiconductor device is formed on a semiconductor substrate. Two wiring patterns are respectively connected to terminals of the semiconductor device, and two electrode pads are respectively connected to the wiring patterns for connecting a signal input/output circuit formed on a separate substrate. Two parallel wiring patterns are respectively connected to the wiring patterns, and two reactance-circuit connection electrode pads are respectively connected to the parallel wiring patterns for electrically connecting a reactance circuit formed on the separate substrate separately from the signal input/output circuit.
摘要:
A multilayer dielectric substrate includes a first signal via, a second signal via, an internal-layer signal line, an internal-layer ground conductor, and ground vias. The first signal via is connected to a bias-and-control-signal terminal of a high-frequency semiconductor, and is arranged within a region corresponding to the electromagnetic shielding members. The second signal via is arranged outside the region, and is connected to an external terminal for a bias and control signal. The internal-layer signal line connects between the first and the second signal vias. The internal-layer ground conductor is arranged around the first and the second signal vias and the internal-layer signal line. The ground vias are arranged around the first and the second signal vias and the internal-layer signal line, on the internal-layer ground conductor. A resistance film is provided on at least one of an upper surface and a lower surface of the internal-layer signal line.
摘要:
Heretofore, a plurality of packages were used in a high frequency module in which a plurality of waveguide terminals were positioned resulting in problems, such as degradation of characteristics in the connection lines between packages, lower ease of assembly when mounting and connecting the connection lines, increased cost, and so forth. To solve these problems, a plurality of cavities having a part or the entire side metallized is formed in a multi-layer dielectric substrate. The multi-layer dielectric substrate is provided with a plurality of waveguide terminals, microstrip line-waveguide converters, RF lines, bias and control signal wiring, and bias and control signal pads. A high frequency circuit is mounted within the cavity and sealed with a seal and cover. This is intended to reduce the number of package, improve performance, improve fabrication, and lower the cost.
摘要:
In recording video/audio information in a digital broadcasting, only when copy control information contained in the video/audio information includes a copy-once signal, a recording processing unit records the video/audio information on an optical disk by an optical disk drive. In editing the video/audio information recorded on the optical disk regardless of the copy control information, when the video/audio information read out from the optical disk has not been subjected to a processing by a CPRM signal and a period free from the processing is not longer than a predetermined time, an edition processing unit deletes a CM segment with the determination that the video/audio information corresponds to the CM segment.