Tian-Wei
Tian-Wei Huang, Taipei TW
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20090189716 | FILTER DEVICE WITH FINITE TRANSMISSION ZEROS - A filter device with transmission zeros is provided according to the present invention, which has an odd mode resonant frequency and an even mode resonant frequency. The filter device includes: a substrate, a metallic rectangular ring, a signal couple-in/couple-out module, and a metallic ground plane, wherein the surface of said metallic ground plane is parallel to the plane enclosed by said metallic rectangular ring, and said metallic rectangular ring applied to the filter device of the present invention has a perimeter shorter than or equal to the wavelength corresponding to the mean of said odd mode resonant frequency and said even mode resonant frequency, thereby allowing said filter device of the present invention, in a situation of specific bandpass frequency, to reduce its perimeter to about half of the perimeter of conventional annular rectangular dual mode filters. In addition, the locations of the transmission zeros can be changed by adjusting the length/width ratio of said metallic rectangular ring, and the frequency response of the filter signal can also be reduced by disposing a ground capacitor module. Accordingly, the area of the dual mode filter can be greatly reduced. Furthermore, the frequency response of the filter signal can be increased by disposing a ground inductor module, accordingly, decreasing the size of dual mode filter and providing a means of easy fabrication thereof. | 07-30-2009 |
20100244962 | DISTRIBUTED ACTIVE TRANSFORMER BASED MILLIMETER-WAVE POWER AMPLIFIER CIRCUIT - A distributed active transformer (DAT) based millimeter-wave (MMW) power amplifier circuit is designed for power amplification of MMW frequency signals. The proposed MMW power amplifier circuit is characterized by distributing the input frequency signals into two sets of differential signals and by the use of a distributed active transformer circuit unit to process these two sets of differential signals to thereby generate an amplified frequency signal as the end result of output. The invention provides higher and greater added values and power added efficiency (PAE) and is ideal for use in millimeter-wave communications systems with an operation frequency around 60 GHz. | 09-30-2010 |
20150214994 | THREE-DIMENSIONAL POWER AMPLIFIER ARCHITECTURE - The present disclosure provides a three-dimensional (3-D) transformer-based (TF-based) power amplifier architecture, including a power splitting plane having at least one input transformer-based circuit; and a power combining plane having at least one output transformer-based circuit. The power splitting plane includes at least one input transmission line, at least one input transformer and an input terminal. Moreover, the power combining plane includes at least one output transmission line, at least one output transformer, at least one power amplifier-cell (PA-cell) and an output terminal. The power combining plane is vertically stacked, attached and electrically connected to the power splitting plane. Consequently, as compared with the existing 2-D power amplifiers, the 3-D transformer-based power amplifier architecture of the present disclosure is capable of achieving a symmetric and compact power distribution layout. Accordingly, the present disclosure further provides an integrated circuit layout for the 3-D TF-based power amplifier architecture. | 07-30-2015 |
Tian-Wei Huang, Taipei City TW
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20100045400 | Marchand Balun With Air Bridge - A microwave or millimeter-wave balun is provided. The balun uses three edge-coupled lines along with a plurality of air bridges instead of two edge-coupled lines used in a conventional planar Marchand balun. The first edge-coupled line and the second edge-coupled line are substantially parallel, and the third edge-coupled line is disposed also substantially in parallel between the first edge-coupled line and the second edge-coupled line. The plurality of air bridges are transmission lines between the first edge-coupled line and the second edge-coupled line. The air bridges have total width longer than one half of the total length of the first edge-coupled line or the second edge-coupled line. By combining three edge-coupled-lines and a plurality of air bridges, the Marchand balun has a higher coupling coefficient and increases the operation bandwidth. The microwave monolithic integrated circuit (MMIC) mixer based on the balun can provide compact size compared to conventional ones. | 02-25-2010 |
Tian-Wei Huang, Taoyuan County TW
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20150194941 | POWER AMPLIFYING APPARATUS - A power amplifying apparatus is provided. The power amplifying apparatus includes a first substrate and N power amplifiers. The N power amplifiers are disposed on the first substrate, the power amplifiers respectively receives N input signals, wherein frequency bands of at least two of the inputs signals are different. And the power amplifiers respectively generate M output signals, wherein the N is a positive integer greater than 2, and M is a positive integer not equal to N. | 07-09-2015 |
Tian-Wei Lu, Guangdong Province CN
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20150224373 | GOLF CLUB HEAD AND MANUFACTURING METHOD THEREOF - A golf club head including a main body and a physical vapor deposition layer is provided. The physical vapor deposition layer is formed on a curved surface of the main body and has a laser engraved structure. The disclosure further discloses a manufacturing method of the golf club head. According to the golf club head and the manufacturing method thereof, the physical vapor deposition layer is formed on the curved surface, so the curved surface appears to have a natural metallic luster and texture. Furthermore, the laser engraved structure is formed on the physical vapor deposition layer by using the laser engraving technology, so the curved surface further appears to have a stereoscopic texture. In addition, the laser engraved structure is filled with a dye layer, so the laser engraved structure appears to have a color different from that of the physical vapor deposition layer. | 08-13-2015 |