Title :
A 0.25/spl mu/m CMOS RF front-end with a low cost patch antenna for GPS receivers
Author :
Sharawi, Mohammad S. ; Aloi, Daniel N.
Author_Institution :
Dept. of Electr. & Syst. Eng., Oakland Univ., Rochester, MI
Abstract :
The design of an RF front-end with 0.25 mum CMOS process is presented with a low cost patch antenna for global positioning system (GPS) receivers. The patch antenna is designed on a low cost dielectric material, FR-4, with epsir = 4.2. The antenna is matched to a 50 Omega transmission line that is connected to a 5th order Chebyshev edge coupled band-pass filter with center frequency at 1.57542 GHz, and bandwidth of 20 MHz via a recessed line-feed. A single-ended narrow-band low-noise amplifier (LNA) is designed with a gain of 28 dB, and NF of 3.4 dB. The single balanced mixer gives a gain of 20 dB, and an IF of 178 MHz, with on chip LC tanks. The mixer NF is 8.6 dB. The front-end is an all NMOS design. Total power dissipation is 18 mW, with total gain of 44 dB, an IIP3 -30 dBm, and NF of 3.8 dB
Keywords :
CMOS integrated circuits; Chebyshev filters; Global Positioning System; band-pass filters; low noise amplifiers; microstrip antennas; radio receivers; 0.25 micron; 1.57542 GHz; 178 MHz; 18 mW; 20 MHz; 20 dB; 28 dB; 3.4 dB; 3.8 dB; 44 dB; 50 ohm; 8.6 dB; CMOS RF front-end; Chebyshev edge coupled band pass filter; GPS receiver; dielectric material; global positioning system; low cost patch antenna; narrow-band low-noise amplifier; recessed line feed; single balanced mixer; transmission line; CMOS process; Costs; Dielectric materials; Gain; Global Positioning System; Noise measurement; Patch antennas; Power transmission lines; Radio frequency; Transmission line antennas;
Conference_Titel :
Circuits and Systems, 2005. 48th Midwest Symposium on
Conference_Location :
Covington, KY
Print_ISBN :
0-7803-9197-7
DOI :
10.1109/MWSCAS.2005.1594356
