| Patent Number |
Title Of Patent |
Date Issued |
| 7369811 |
System and method for sensitivity optimization of RF receiver using adaptive nulling |
May 6, 2008 |
| The present invention provides sensitivity enhancement for a single antenna RFID interrogating device by separately coupling a nulling signal formed using a portion of a transmit signal into a receiver. The phase and amplitude of nulling signal can be adjusted so that the nulling sig |
| 7345547 |
Bias circuit for BJT amplifier |
March 18, 2008 |
| The embodiments of the present invention include a bias circuit for a power-amplifying device, which receives and amplifies an input RF signal having a series of RF cycles within a modulation envelop. The bias circuit compensates odd-order distortion processes by detecting the power |
| 7239858 |
Integrated switching device for routing radio frequency signals |
July 3, 2007 |
| An RFID reader accessible thorough a personal computer and includes a PC card interface and a controller both operating according to clock signals from a crystal oscillator. The RFID reader further includes a linearized power amplifier modulator in a transmit path, a receive chain capabl |
| 7235846 |
ESD protection structure with SiGe BJT devices |
June 26, 2007 |
| The present invention provides an ESD protection device or structure that exploits the high conductivity of a heavily doped heterojunction base of a standard SiGe bipolar junction transistor (BJT) cell. This improved ESD protection scheme further uses the combination of trench isolation |
| 7197279 |
Multiprotocol RFID reader |
March 27, 2007 |
| An RFID reader accessible thorough a personal computer and includes a PC card interface and a controller both operating according to clock signals from a crystal oscillator. The RFID reader further includes a linearized power amplifier modulator in a transmit path, a receive chain capabl |
| 7183994 |
Compact antenna with directed radiation pattern |
February 27, 2007 |
| The present invention includes a balanced compact antenna, conforming to the envelope restrictions appropriate to a PC-card form factor, with maximum radiation intensity along a long axis of the card. The inventive antenna configuration employs an inductive shorting bar to match an " |
| 7012288 |
Heterojunction bipolar transistor having non-uniformly doped collector for improved safe-operati |
March 14, 2006 |
| The safe-operating area (SOA) in a heterojunction bipolar transistor (HBT) is improved by providing a collector region in the transistor having a graded (uniformly or stepped) doping between the base region and the underlying subcollector region with the collector doping being lower near |
| 6285720 |
Method and apparatus for high data rate wireless communications over wavefield spaces |
September 4, 2001 |
| The invention relates to a method and apparatus for digital communications that provides high data rate wireless connections with bandwidth efficiency. The creation of multiple channels (that share the same time-frequency region) between the transmitter and the receiver is achieved b |
| 6263198 |
Multi-layer printed wiring board having integrated broadside microwave coupled baluns |
July 17, 2001 |
| A microwave broadside coupled balun integral in a multi-layer printed wiring board formed by broadside coupled conductors embedded in the multi-layer printed wiring board. The balun may be used to form components which are integrated into the multi-layer printed wiring board, such as a |
