An object is to provide a semiconductor device of which a manufacturing process is not complicated and by which cost can be suppressed, by forming a thin film transistor using an oxide semiconductor film typified by zinc oxide, and a manufacturing method thereof. For the semiconductor device, a gate electrode is formed over a substrate; a gate insulating film is formed covering the gate electrode; an oxide semiconductor film is formed over the gate insulating film; and a first conductive film and a second conductive film are formed over the oxide semiconductor film. The oxide semiconductor film has at least a crystallized region in a channel region.

Semiconductor device, and manufacturing method thereof

A wireless IC device includes a wireless IC chip arranged to process a radio signal, a power-supply circuit board that is connected to the wireless IC chip and that includes a power supply circuit including at least one coil pattern, and a radiation plate arranged to radiate a transmission signal supplied from the power-supply circuit board and/or receiving a reception signal to supply the reception signal to the power-supply circuit board. The radiation plate includes an opening provided in a portion thereof and a slit connected to the opening. When viewed in plan from the direction of the winding axis of the coil pattern, the opening in the radiation plate overlaps with an inner area of the coil pattern and the area of the inner area is approximately the same as that of opening.

Wireless IC device

Aspects of the subject disclosure may include, for example, receiving, by a feed point of a dielectric antenna, electromagnetic waves from a dielectric core coupled to the feed point without an electrical return path, where at least a portion of the dielectric antenna comprises a conductive surface, directing, by the feed point, the electromagnetic waves to a proximal portion of the dielectric antenna, and radiating, via an aperture of the dielectric antenna, a wireless signal responsive to the electromagnetic waves being received at the aperture. Other embodiments are disclosed.

Method and apparatus for coupling an antenna to a device

A distributed antenna and backhaul system provide network connectivity for a small cell deployment. Rather than building new structures, and installing additional fiber and cable, embodiments described herein disclose using high-bandwidth, millimeter-wave communications and existing power line infrastructure. Above ground backhaul connections via power lines and line-of-sight millimeter-wave band signals as well as underground backhaul connections via buried electrical conduits can provide connectivity to the distributed base stations. An overhead millimeter-wave system can also be used to provide backhaul connectivity. Modules can be placed onto existing infrastructure, such as streetlights and utility poles, and the modules can contain base stations and antennas to transmit the millimeter-waves to and from other modules.

Backhaul link for distributed antenna system

A distributed antenna system is provided that frequency shifts the output of one or more microcells to a 60 GHz or higher frequency range for transmission to a set of distributed antennas. The cellular band outputs of these microcell base station devices are used to modulate a 60 GHz (or higher) carrier wave, yielding a group of subcarriers on the 60 GHz carrier wave. This group will then be transmitted in the air via analog microwave RF unit, after which it can be repeated or radiated to the surrounding area. The repeaters amplify the signal and resend it on the air again toward the next repeater. In places where a microcell is required, the 60 GHz signal is shifted in frequency back to its original frequency (e.g., the 1.9 GHz cellular band) and radiated locally to nearby mobile devices.

Remote distributed antenna system

A circularly-polarized-wave patch antenna includes a main body having a patch electrode provided with two feeding points and a circuit for generating a phase difference of 90° between signals supplied to the feeding points. A Wilkinson distribution circuit is provided between the 90°-phase-difference generating circuit and a coaxial cable (feeder line) so as to improve a reflection characteristic. The patch antenna includes two feeding points, and thus a favorable axial ratio characteristic can be obtained in a wide band. Also, a favorable reflection characteristic can be obtained in a wide band because of the Wilkinson distribution circuit. Accordingly, the patch antenna can be used in a wider frequency band.

Circularly-polarized-wave patch antenna which can be used in a wide frequency band

A dielectric feeder has a holding portion inserted into the interior of a waveguide and a horn-shaped radiating portion having different radiation angles in major- and minor-axis directions A plurality of annular grooves each having a depth corresponding to about a quarter wavelength of a radio wavelength λ 0 is formed in an end face of the radiating portion An outer peripheral surface of the holding portion is cut out at circumferentially opposed positions axially in parallel with each other to form a pair of flat surfaces Both flat surfaces are positioned in the major axis directions of the radiating portion and are thereby allowed to function as a phase compensating portion for compensating a propagative phase difference induced in the radiating portion Further, there is formed a stepped hole comprising two recesses which are contiguous to each other from an end face of the holding portion toward the interior of the holding portion The recesses are each set at a depth corresponding to about a quarter wavelength of a radio wavelength λ∈ and are thereby allowed to function as an impedance converting portion

Primary radiator suitable for size reduction and preventing deterioration of cross polarization characteristic

The antenna-integrated module contains a circuit board 1 on which a high frequency circuit is provided, a cover 2 that is composed of a metal plate and is mounted to the circuit board 1 so as to cover almost the entire surface of the circuit board 1 , and a dedicated shield case 3 that is composed of a metal plate and is mounted to the circuit board 1 so as to cover a specific region on the circuit board 1 . The high frequency circuit comprises a wiring pattern 4 and a ground pattern 5 , and electronic parts 6 , and the dedicated shield case 3 covers a portion of the high frequency circuit. Leg pieces 2 b and 2 c of the cover 2 are connected to the wiring pattern 4 and the ground pattern 5 , In the cover 2 , an upper plate 2 a corresponding to a radiation conductor portion functions as both an inverted F-type antenna and a shield case.

Small-sized and high-gained antenna-integrated module

The antenna device 11 contain a first radiating conductive plate 13 arranged above a grounding conductor 12 so as to be substantially parallel and opposite to the grounding conductor 12; a second radiating conductive plate 14 adjacent to the first radiating conductive plate 13 with a slit 15 interposed therebetween; a feeding conductive plate 16 and a first shorting conductive plate 17 that extends substantially orthogonally from an outer edge of the first radiating conductive plate 13 so as not to be opposite to the slit 15; and a second shorting conductive plate 18 that extends substantially orthogonally from an outer edge of the second radiating conductive plate 14 so as not to be opposite to the slit 15. The feeding conductive plate 16 is connected to a feeding circuit, and the first and second shorting conductive plates 17 and 18 are connected to the grounding conductor 12.

Small-size, low-height antenna device capable of easily ensuring predetermined bandwidth

A slot antenna apparatus 10 contains a circuit substrate having a high-frequency circuit arranged therein and a shield case accommodating the circuit substrates. A cross-shaped slot and a feeding pin are formed in an upper plate of the shield case. The cross-shaped slot is composed of a first and second slots. The lengths of the slots are different and the slots are perpendicular to each other. The shortest distances from the feeding pin to the first slots are approximately equal. When the power is fed to the upper plate through the feeding pin, the slots are excited to irradiate linearly polarized waves perpendicular to each other, respectively.

Dou Yuanzhu

Papers

Circularly-polarized-wave patch antenna which can be used in a wide frequency band

Primary radiator suitable for size reduction and preventing deterioration of cross polarization characteristic

Small-sized and high-gained antenna-integrated module

Small-size, low-height antenna device capable of easily ensuring predetermined bandwidth

Circular polarization slot antenna apparatus capable of being easily miniaturized