Abstract: A multiband antenna includes an antenna portion having a front surface and a back surface and a ground plane located adjacent to the antenna portion. The multiband antenna includes a front surface side element arranged on the front surface side and connected to a feeding point. The back surface side element arranged on the back surface side and connected to the ground plane.

Abstract: A filter includes: a container; at least one barrier, an input device and an output device. The at least one barrier divide the container into at least two resonant cavities. Each resonant cavity has a harmonic oscillators disposed therein. At least one of the harmonic oscillators comprises a supporter and a carbon nanotube structure disposed on a surface of the supporter.

Abstract: A chipset package structure includes a carrier, a plurality of pinouts, at least one semiconductor package preforms, at least one electromagnetic shielding layer and a protective layer. The pinouts are disposed on the carrier. The semiconductor package preforms is disposed on the second surface of the carrier and electrically connected to the pinouts. The electromagnetic shielding layer is disposed on the semiconductor package preforms and the electromagnetic shielding layer. At least one of the electromagnetic shielding layers comprises a carbon nanotube film structure. The protective layer covers the electromagnetic shielding layer.

Abstract: An optoelectronic semiconductor component includes a light-emitting chip for emitting light, and a reflective substrate. A plurality of linear indent structures is formed on the reflective substrate. The light-emitting chip is installed on the reflective substrate and located on a side of the plurality of linear indent structures. The plurality of linear indent structures is capable of reflecting the light emitted from the light-emitting chip.

Abstract: A multiband antenna includes a long radiating branch, a short radiating branch, a short strip, a feed point, a grounding portion, a connecting portion, a long parasitic strip, and a short parasitic strip. The feed point, the long radiating branch, the short radiating branch, and the short strip are in a first plane. The grounding portion connects to the short strip. The connecting portion connects the long radiating branch, the short radiating branch, and the short strip. The long radiating branch, the short strip, and the connecting portion form a first inverted-L shaped antenna structure. The short radiating branch, the short strip, and the connecting portion form a second inverted-L shaped antenna structure. The long parasitic strip and the short parasitic strip are in a second plane and respectively connected to the grounding portion. The first plane is parallel to the second plane.

Abstract: A bicycle transmission mechanism including: a fixed housing having an annular cavity; a ratchet member attached to a wall of the annular cavity of the fixed housing; a locking member slidably disposed in the annular cavity of the fixed housing, the locking member being formed with a cord hole, a cord head of a steel cord being fitted in the cord hole, a cord body of the steel cord extending from the cord head out of the cord hole, the cord head and the cord body containing an angle, whereby the cord head provides a resilient force which makes a first end of the locking member always tend to deflect toward the ratchet member and engage therewith so as to one-way detent the locking member; and a rotary member having a projecting linking section for rotationally driving the locking member to wind/unwind the steel cord.

Abstract: A bicycle transmission control device includes a fixed housing fitted on a handlebar of the bicycle, one side of the housing being recessed to form an annular cavity in which a first locating section is disposed. A locking member having a first linking section and pivotably and slidably mounted in the annular cavity, one end of the locking member being formed with a second locating section, any end of the locking member being hooked with one end of the steel cord of the bicycle transmission system, the steel cord always resiliently pulling the locking member, whereby the second locating section is biased toward the first locating section to engage therewith. A rotary member fitted on the handlebar and pivotally mounted on outer side of the housing, a second linking section protruding from inner side of the rotary member for drivingly connecting with the first linking section of the locking member.

Abstract: An output power control system prevents saturation by limiting total output power and maintaining closed loop responsiveness for a radio telephone having closed loop and open loop gain control systems. The output power control system determines when total output power exceeds an output power trigger level and automatically enters a saturation prevention mode whereby total output power is reduced through modification of a closed loop power control register. In one embodiment, an output detector and an output comparator continuously monitor output power, and in another embodiment, an analog-to-digital converter samples output power levels.

Abstract: A circuit for connecting multiple signal paths within a multi-mode communication device includes a double balanced mixer circuit selectively functioning as a modulation switch during an unbalanced state. As applied to a transmit section of a CDMA/FM cellular telephone, a dual-function double balanced mixer circuit connects a CDMA IF signal path with an FM audio signal path. The double balanced mixer circuit includes a double balanced mixer connected through oscillator input to an external LC (inductor-capacitor) tank connected to both a PLL (phase lock loop) and an FM audio signal. One signal input of the double balanced mixer receives a CDMA low IF signal, while the other double balanced mixer signal input is connected to a microprocessor-controlled switch for selectively unbalancing the balanced mixer while in the FM mode of operation.

Abstract: An output power control system prevents saturation by limiting total output power and maintaining closed loop responsiveness for a radio telephone having closed loop and open loop gain control systems. The output power control system determines when total output power exceeds an output power trigger level and automatically enters a saturation prevention mode whereby total output power is reduced through modification of a closed loop power control register. In one embodiment, an output detector and an output comparator continuously monitor output power, and in another embodiment, an analog-to-digital converter samples output power levels.

Abstract: A circuit for connecting multiple signal paths within a multi-mode communication device includes a double balanced mixer circuit selectively functioning as a modulation switch during an unbalanced state. As applied to a transmit section of a CDMA/FM cellular telephone, a dual-function double balanced mixer circuit connects a CDMA IF signal path with an FM audio signal path. The double balanced mixer circuit includes a double balanced mixer connected through oscillator input to an external LC (inductor-capacitor) tank connected to both a PLL (phase lock loop) and an FM audio signal. One signal input of the double balanced mixer receives a CDMA low IF signal, while the other double balanced mixer signal input is connected to a microprocessor-controlled switch for selectively unbalancing the balanced mixer while in the FM mode of operation.