D. Zhou
 Write for Microwaves & RF
3 results found for D. Zhou, displaying items 1 - 3

April 2009   [Test & Measurement]
Analyzing A 5.5-GHz DRO For WLANs
Dielectric-resonator oscillators (DROs) provide low-noise signals for a variety of wireless and other applications. Computer- aided-engineering (CAE) tools can be invaluable in designing and optimizing the performance of these oscillators, as will be shown with the design for a prototype oscillator in support of wireless-localarea- network (WLAN) applications at 5.5 GHz. By applying a number of different CAE tools, including a harmonic-balance simulator...

October 2008   [Test & Measurement]
Measure The Range Of Sensor Networks
Wireless sensor networks (WSNs) provide invaluable services with their short-range communications capabilities. But their limited operating power can impose restrictions on the maximum allowable distance between the sensors and the base station.1,2 Due to this limitation, direct communications between a sensor and its base station is not always possible, especially in a difficult radio environment with strong attenuation. To overcome this...

March   [Communications]
Design An Integrated Oscillator/Antenna
This design tightly integrated an active oscillator with a microstrip patch antenna for miniaturization in WLAN, Bluetooth, and other 2.45-GHz systems. R. A. Abd-Alhameed, D. Zhou, C. H. See, P. S. Excell, A. Ghorbani, and N. J. Mcewan Mobile and Satellite Communications Research Centre, Bradford University, Bradford, BD7 1DP, United Kingdom; e-mail: r.a.a.abd@bradford.ac.uk. Miniaturization...