Abstract:
A protective film comprises a substrate and a semi-cured protective layer over the substrate. The semi-cured protective layer is formed by curing a liquid mixture consisting of a thermosetting resin and a radiation curing resin.
Abstract:
A dual-band antenna has a ground portion, a connection portion with a feeding point separated from the ground portion and a short portion connected to the ground portion and the connection portion. The short portion and the ground portion are formed an acute angle therebetween. The connection portion respectively connect a first radiating portion and a second radiating portion. The first radiating portion and the second radiating portion are parallel to said ground portion. The short portion is arranged between the ground portion and the first radiating portion. When the dual-band antenna operates at wireless operation, the connection portion, the first radiating portion and the second radiating portion resonate to obtain a first frequency range and a second frequency range. The short portion is formed as a function of an inductance.
Abstract:
A triple-band embedded antenna includes an antenna base and a metal connecting board. A left groove, a right groove and a square opening are formed in the antenna base. A left branch is separated from the antenna base by the left groove, the left branch arranged in the outside of the left groove, a signal feed point formed in the left branch. A right branch is separated from the antenna base by the right groove, the right branch arranged in the outside of the right groove, a ground point formed in the right branch. The antenna base is for receiving or radiating the low frequency band signal. The left groove is for receiving or radiating the high frequency band signal. While the right groove coupled with the left groove, the left groove can receive or radiate another high frequency band signal, which is the third frequency band signal.
Abstract:
An antenna structure includes an antenna portion having an antenna defining a feeding point and a grounding point, and a grounding portion electrically connecting with the grounding point of the antenna. The grounding portion defines a basic board. The basic board is bent upwardly from edges thereof to form a first extending portion. The first extending portion is bent inwardly from a top edge thereof to form a second extending portion approximately paralleling with the basic board. Through the first and second extending portions, the area of the grounding portion is extended. And the electric field is widely distributed all over the whole grounding portion including the basic board and the first and second extending portions to decrease the SAR of the antenna.
Abstract:
A MEMS microphone module includes a substrate and a conducting lid covered on the substrate to define a chamber therebetween for accommodation of a MEMS chip and an ASIC chip. A ground layer of the substrate is electrically coupled to a protrusion of the conductive lid to form an EMI shielding structure. By this way, an EMI shielding effect can be applied by the EMI shielding structure to the MEMS chip and the ASIC chip.
Abstract:
A MEMS microphone chip with an expanded chamber comprises a base plate, and the base plate has a main chamber and a secondary chamber. The secondary chamber is formed beside the main chamber, and is connected to the main chamber. A vibration membrane is suspended above the main chamber for receiving external sound waves, and the vibration membrane vibrates in corresponding to the chambers. The MEMS microphone chip has a higher sensitivity because of the expanded chamber, and therefore has a more ideal audio frequency response curve.
Abstract:
An imitating natural plant fiber, preparation method thereof and the fabric made of it are provided. The preparation method includes the following steps: rolling and milling the mixture of plural first polyolefine chips, constant thermoplastic elastomer (TPE) and plural microcapsules which encapsulate essential oil extracted from natural plant in the twin-screw extruder, thus plural masterbatches can be made; melting and mixing the above masterbatches and plural second polyolefine which is same as the first one, thus a composite can be made, wherein the final content of the microcapsules is 1-32% by weight; and producing fibers by spinning, cooling, heat stretching, and heat setting. The fiber and the fabric made of it have durable natural plant aroma.
Abstract:
A wireless device includes a housing having a shielding case and a dielectric case. The housing receives a printed circuit board and an antenna element. The printed circuit board has a feeding pad, a first ground pad and a second ground pad. The antenna has a feeding portion electronically coupled with the feeding pad of the printed circuit board and a ground portion electronically coupled with the shielding case for increasing ground dimension to improve antenna characteristic. The first and second ground pads of the printed circuit board electronically coupled with the shielding case for reducing coupling effect to improve antenna characteristic.
Abstract:
A mobile phone has a housing and an antenna assembly configured in the housing. The housing has a front portion, a rear portion, a top portion, a bottom portion and a side portion. The antenna assembly has a telecommunication antenna operating as at least one wireless telecommunication band, a short range antenna operating as at least one wireless short range communication band, a first broadcast receiving antenna operating at first broadcast band and a second broadcast receiving antenna operating at second broadcast band. The first broadcast band is lower than the second broadcast band. Each of the antennas is configured in at lest one of the portions of the housing. The mobile phone operates at diverse wireless communication systems by using the antennas. The antennas are dispersed in the mobile phone for reducing electromagnetic interference and size of the mobile phone.
Abstract:
An antenna system adapted for a communication device has a common antenna with a predetermined length, an AM matching circuit matching with the common antenna and an FM matching circuit matching with the common antenna. A switch alternatively electrically connects the common antenna to the AM matching circuit and the FM matching circuit for achieving the AM function and FM function.