Patent application number | Description | Published |
20120154224 | HANDHELD DEVICE AND PLANAR ANTENNA THEREOF - A handheld device and a planar antenna thereof are provided. The planar antenna comprises a radiator having a feeding point, a first short point and a second short point. The feeding point is coupled to a circuit board of the handheld device so that the handheld device transmits and receives a RF (radio frequency) signal through the radiator. The first short point is coupled to a ground of the circuit board so as to be grounded. A control element is disposed on the handheld device or the planar antenna in order to control the second short point to be selectively electrically coupled to the ground so that the planar antenna can operate at two different central frequencies. Furthermore, the planar antenna can operate at multiple central frequencies by changing a position of the second short point contacted to the radiator. | 06-21-2012 |
20120229346 | HANDHELD DEVICE - A handheld device is provided, wherein the handheld device comprises a housing, a circuit board, a planar antenna and a switch. The housing comprising an outer surface is configured to define a receiving space. The circuit board is disposed in the receiving space. The planar antenna comprises a metal layer, wherein the metal layer comprising a first connecting point and a second connecting point is patterned on the outer surface. The switch comprising a first electrode and a second electrode is configured to control the electrical connection between the first connecting point and the second connecting point, wherein the first electrode and the second electrode are electrically connected between the first connecting point and the second connecting point. The planar antenna operates at a first central band when the switch is turned on, and operates at a second central band when the switch is turned off. | 09-13-2012 |
20120287014 | HANDHELD DEVICE AND PLANAR ANTENNA THEREOF - A handheld device and a planar antenna thereof are provided. The planar antenna comprises a radiator, a screening element and a switch. The screening element is configured to make the planar antenna operating in a first high-frequency (HF) current path and a first low-frequency (LF) current path, and the switch is configured to make the planar antenna operating in a second HF current path and a second LF current path. The planar antenna operates at a first HF central frequency corresponding to the first HF current path and a first LF central frequency corresponding to the first LF current path when the switch is turned off, and operates at a second HF central frequency corresponding to the second HF current path and a second LF central frequency corresponding to the second LF current path when the switch is turned on. | 11-15-2012 |
20130099993 | ELECTRONIC DEVICE FOR PROCESSING RADIO FREQUENCY SIGNALS AND MATCHING CIRCUIT FOR PROVIDING VARIABLE IMPEDANCE - An electronic device includes an antenna, an RF circuit, and a matching circuit. The matching circuit is configured to provide variable impedance between the antenna and the RF circuit, wherein the matching circuit includes a first element having a first terminal and a second terminal, and wherein the first terminal is coupled to the antenna; a second element having a third terminal connected to the second terminal of the first element and a fourth terminal coupled to the RF circuit; a first tuning cell connected to the second terminal of the first element and the third terminal of the second element, and comprising a first tuning element, a second tuning element and a first control element, wherein the first control element determines whether to make a first node connected between the first and second tuning elements couple to a voltage level. | 04-25-2013 |
20130099996 | HANDHELD DEVICE AND PLANAR ANTENNA THEREOF - A handheld device and a planar antenna thereof are provided. The planar antenna comprises a radiator with an open terminal, a short terminal, a first feeding terminal and a second feeding terminal. The short terminal is coupled to a ground terminal. The first feeding terminal is formed between the open terminal and the short terminal, and coupled to a radio frequency (RF) signal terminal. The second feeding terminal is formed between the open terminal and the first feeding terminal, and coupled to the first feeding terminal by a transmission line and a switch element. The radiator resonates at the first central frequency when the switch element is turned off, and resonates at the second central frequency when the switch element is turned on. | 04-25-2013 |
20130257668 | MOBILE DEVICE AND ANTENNA ARRAY THEREOF - A mobile device at least includes a dielectric substrate, an antenna array, and a transceiver. The antenna array includes a first antenna, a second antenna, and a third antenna. The third antenna is disposed between the first and second antennas so as to reduce coupling between the first and second antennas. The first, second and third antennas are all embedded in the dielectric substrate and substantially arranged in a straight line. Each of the first and second antennas is a transmission antenna and the third antenna is a reception antenna, or each of the first and second antennas is a reception antenna and the third antenna is a transmission antenna. The transceiver is coupled to the antenna array and is configured to transmit or receive a signal. | 10-03-2013 |
20140080548 | Handheld Communication Device and Communication Method of the Same - A communication method used in a handheld communication device is provided. The communication method comprises the steps outlined below. Whether a voice communication is established is determined. When the voice communication is established, a sensing element is activated to determine whether the handheld communication device is operated in a hand mode. When the handheld communication device is not operated in the hand mode, an antenna module of the handheld communication device would be operated in a first operation frequency band to perform the voice communication. When the handheld communication device is operated in the hand mode, the antenna module of the handheld communication device would be operated in a second operation frequency band to perform the voice communication, in which the second operation frequency band is higher than the first operation frequency band. A handheld communication device is disclosed herein as well. | 03-20-2014 |
20150022404 | HANDHELD DEVICE - A handheld device is provided, wherein the handheld device comprises a housing, a circuit board, a planar antenna and a switch. The housing comprising an outer surface is configured to define a receiving space. The circuit board is disposed in the receiving space. The planar antenna comprises a metal layer, wherein the metal layer comprising a first connecting point and a second connecting point is patterned on the outer surface. The switch comprising a first electrode and a second electrode is configured to control the electrical connection between the first connecting point and the second connecting point, wherein the first electrode and the second electrode are electrically connected between the first connecting point and the second connecting point. The planar antenna operates at a first central band when the switch is turned on, and operates at a second central band when the switch is turned off. | 01-22-2015 |
20150077298 | MOBILE DEVICE AND ANTENNA STRUCTURE USING IONIC POLYMER METAL COMPOSITE THEREIN - A mobile device includes an antenna structure, a signal source, and an IPMC (Ionic Polymer Metal Composite). The signal source is configured to excite the antenna structure. The IPMC is configured as a flexible actuator to adjust a resonant length of the antenna structure in such a manner that the antenna structure is capable of operating in multiple bands. | 03-19-2015 |