A MICROWAVE FREQUENCY SOURCE FOR UPPER BAND WLAN
APPLICATIONS
Veda veer Singh#1, Anil Kumar Sharma*2
Department of Electronics & Communication Engineering, IET, Mangalayatan University
Aligarh, Uttar Pradesh, INDIA
E-mail:1vedveers@gmail.com, 2anil.sharma@mangalayatan.edu.in
Abstract- We present a microwave frequency source circuit for upper band
(5.25GHz) WLAN applications. The oscillator is designed using Agilent ADS
providing a phase noise -110dbc/Hz and output power level of 10dbm. The
frequency source is realized in microstrip technology with dielectric constant 3.2,
height of the substrate as 1.524 mm and loss tangent 0.0025. The PHEMT used in
this frequency synthesizer is having high Q factor and low insertion loss. The gate
to source voltage VGS is taken as -0.7 V and drain to source voltage is 2 V. The
frequency of oscillation is 5.25 GHz with an output power level being equal to 1.7
dBm. The phase noise of the oscillator is better than -110dBc/Hz with an offset of
10MHz and the first harmonic frequency power level being suppressed at least 15
dBm below. This microwave frequency source can be used in applications
dedicated to ISM band frequencies.