R.A. Sadler

  • Citations Per Year
Learn More
A wide-band/dual-band packaged antenna is proposed for wireless local-area network (WLAN) applications in the 5.15-5.35 GHz and 5.725-5.825 GHz frequency range. The antenna is internal to the housing of a personal digital assistant, such as a Palm organizer, and has the dimensions of 28 by 9 by 3 mm on an FR4 substrate. The antenna meets or exceeds the(More)
A uniquely packaged internal inverted-F antenna is proposed for Bluetooth or wireless local area network (WLAN) application. The antenna is printed on the inside surface of the stylus holder of a personal digital assistant (PDA) or a smart phone. The proposed antenna operates within 2:1 voltage standing wave ratio (VSWR) throughout the entire Bluetooth band(More)
A wideband microstrip patch antenna has been analyzed, designed, fabricated, and measured for wireless local area network (LAN) applications in the 5-6 GHz frequency range. The antenna is internal to the housing of a personal digital assistant (PDA), such as a PALM organizer and has the dimensions of 28 mm by 9 mm by 3 mm on an FR4 substrate. The antenna(More)
A GaAs divide-by-two circuit operating at a clock rate of 5.1 GHz and dissipating only 1.9 mW has been demonstrated. This represents the best room-temperature speed-power performance yet reported for any flip-flop. The D-type flip-flop owes its high performance to a 0.5- mu m TiWN self-aligned gate fabrication process using low-capacitance dielectric(More)
Planar ion-implanted GaAs MESFETs with modified drain n/sup +/ regions show increased open-channel burnout voltage, making them robust against transient overvoltages. This increases circuit yields through pulsed on-wafer testing from <50% to /spl sim/90%. Higher drain biases can also be used, allowing 9 W of output power to be produced with VD/sub DS/=13 V(More)
  • 1