Tyco Electronics Services Gmbh

University of California

Hollinworth Fund, L.l.c.

Macroblock, Inc.

Gula Consulting Limited Liability Company

Cheng-Jung Lee

Ajay Chandra Gummalla

Maha Achour

Tatsuo Itoh

Alexandre Dupuy

Gregory Poilasne

Raul Inocencio Alidio

Can Zheng

Pei-Ling Chi

Vaneet Pathak

Sunil Kumar Rajgopal

Woo Yong Lee

Kevin M Leong

Vladimir Penev

Kevin M K H Leong

Nhan Duc Nguyen

Yang-Ci Jheng

An antenna device includes a substrate having a first surface and a second surface. A first conductive layer is formed on the first surface of the substrate, the first conductive layer having a perimeter defined by one or more shapes having straight or curved edges. The first conductive layer defines a slot and a coupling gap, and also includes a top ground. The coupling gap separates the top ground from a metal plate region. A second conductive layer is formed on the second surface of the substrate, the second conductive layer including a bottom ground. The slot, coupling gap, first conductive layer, and substrate form a composite right and left handed (CRLH) structure.

Multiband composite right and left handed (CRLH) slot antenna

Antenna devices and techniques that provide specific control of the spatial distributions of DC and RF signals at various positions in a wireless apparatus are disclosed. The wireless apparatus includes various device components each having specifications for achieving desired operations in antenna devices.

Antenna devices having frequency-dependent connection to electrical ground

Architectures and implementations of a transceiver system for wireless communications are presented, the system including one or more antennas supporting a single frequency band or multiple frequency bands, a transmit circuit, a receive circuit, and an isolation circuit that is coupled to the one or more antennas and the transmit and receive circuits and provides adequate isolation between the transmit circuit and the receive circuit.

RF front-end module and antenna systems

Techniques and apparatus based on metamaterial structures provided for antenna and transmission line devices, including single-layer metallization and via-less metamaterial structures.

Single-layer metallization and via-less metamaterial structures

Techniques, antenna systems and apparatus based on composite right and left handed (CRLH) metamaterial (MTM) structures to couple CRLH MTM circuits to transistors to amplify signals in wireless RF receivers and transmitters.

Advanced active metamaterial antenna systems

A light emitting diode (LED) driving device outputs a driving signal according to a select signal, an update data, and an update command. The driving device includes a buffer circuit, a display data storage, and a signal generating circuit. The buffer circuit includes register series and a bypass register. The buffer circuit selectively stores the update data in the register series and the bypass register according to the update command. The display data storage stores multiple display data. The display data storage updates the display data by using the update data stored in the register series according to the update command. The signal generating circuit outputs the driving signal according to the display data. When the update data is stored in the bypass register, the clock of the update data passing through the driver is reduced.

LED driving device and driving system thereof

A compact multi-band hybrid ring (rat-race) coupler utilizing a ring of composite right-handed and left-handed (CRLH) transmission lines (TLs) and multiple ports, provides miniaturization and the ability to operate at arbitrary frequency bands unlike conventional couplers. The hybrid ring is made compact, such as by constraining phase delay contributions |&#x3c6;|, |&#x3c6;|&#x2266;270&#xb0;. The coupler can be used in many applications, for example as a mode decoupling network in a dual-band front-end MIMO system. The inclusion of a CRLH delay line is also described which alters the phase relationship of the signals and is particularly well suited for extending pattern diversity in response to frequency.

Compact dual-band metamaterial-based hybrid ring coupler

Techniques and devices based on antenna structures with a MTM loading element.

Metamaterial loaded antenna devices

Implementations and examples of power amplifier devices, systems and techniques for amplifying RF signals, including power amplifier systems based on Composite Right and Left Handed (CRLH) metamaterial (MTM) structures.

Power amplifier architectures

A dual-band resonator with compact size, such as a resonant type dual-band antenna, which uses an anisotropic metamaterial is described. The artificial anisotropic medium is implemented by employing a composite right/left-handed transmission line. The dispersion relation and the antenna physical size only depend on the composition of the unit cell and the number of cells used. By engineering the characteristics of the unit cells to be different in two orthogonal directions, the corresponding propagation constants can be controlled, thus enabling dual-band antenna resonances. In addition, the antenna dimensions can be markedly minimized by maximally reducing the unit cell size. A dual-band antenna is also described which is designed for operation at frequencies for PCS/Bluetooth applications, and which has a physical size of 1/18&#x3bb;&#xd7; 1/18&#x3bb;&#xd7; 1/19&#x3bb;, where &#x3bb;is the free space wavelength at 2.37 GHz.

Compact dual-band resonator using anisotropic metamaterial

An apparatus based on composite right-handed or left-handed (CRLH) principles to provide a transmission line or antenna structure having a plurality of cells to which one or more feed ports are attached. The apparatus is based on an equivalent circuit Right-Hand (RH) series induction (L) and shunt capacitor (C), and Left-Hand (LH) series capacitor (C) and induction (L), in which effective permittivity (e) and permeability (m) of the structure are manipulated by the choice of C, L, C, and L. One embodiment describes mushroom antenna cells (D orD array) in which vias extend up from a feed network on a ground plane through at least one dielectric region to each of a first plurality of conductive elements (plates or strips). Optionally, a second plurality of conductive elements are disposed between first and second dielectric layers to form metal-insulator-metal (MIM) capacitors to lower resonance frequency.

Growing community of inventors

San Diego, CA, United States of America

Cheng-Jung Lee