Open Access
Subscription or Fee Access
Designing of RF Mixer for GSM Systems with Improved Performance
Abstract
ABSTRACT
This study focuses on the designing of RF mixer for GSM systems with improved performance in terms of conversion gain, S-parameter and noise figure of Gilbert mixer. A mixer is an essential component of modern radio architectures, which is responsible for frequency translation process. Fundamentally in time-domain analysis, the mixer acts like a multiplier. In frequency domain, mixer translates the frequency content of the input signal to the higher or lower frequencies in the spectrum. The three ports of the mixers are the local oscillator port, radio frequency port and intermediate port. When the desired output frequency is lower than the input frequency, then this process is called down conversion process, and the mixer which performs this operation is known as down conversion mixer, and in this case, the input is RF and the output is IF. When the desired output frequency is greater than the input frequency, then this process is called up-conversion process and the mixer which performs this operation is known as an up-conversion mixer, and in this case, the input is IF and the output is RF. GSM stands for Global System for Mobile Communication. It is a digital cellular technology used for transmitting mobile voice and data services. GSM is the most widely accepted standard in telecommunications and it is implemented globally.
Keywords: GPS, GSM, isolation, matching, spectrum.
This study focuses on the designing of RF mixer for GSM systems with improved performance in terms of conversion gain, S-parameter and noise figure of Gilbert mixer. A mixer is an essential component of modern radio architectures, which is responsible for frequency translation process. Fundamentally in time-domain analysis, the mixer acts like a multiplier. In frequency domain, mixer translates the frequency content of the input signal to the higher or lower frequencies in the spectrum. The three ports of the mixers are the local oscillator port, radio frequency port and intermediate port. When the desired output frequency is lower than the input frequency, then this process is called down conversion process, and the mixer which performs this operation is known as down conversion mixer, and in this case, the input is RF and the output is IF. When the desired output frequency is greater than the input frequency, then this process is called up-conversion process and the mixer which performs this operation is known as an up-conversion mixer, and in this case, the input is IF and the output is RF. GSM stands for Global System for Mobile Communication. It is a digital cellular technology used for transmitting mobile voice and data services. GSM is the most widely accepted standard in telecommunications and it is implemented globally.
Keywords: GPS, GSM, isolation, matching, spectrum.
References
Lee T. The Design of CMOS Radio-Frequency Integrated Circuits, 2nd Edn. Cambridge University Press; 2004, ISBN 0-521-835389-9, Chapter 13.
Razavi B. RF Microelectronics. Upper Saddle River, NJ: Prentice Hall; 1998, pp.38--41, 48--50, 131--132, 138--143, 182--187.
Vahidfar MB, Shoaei O, Svelto F. A High Dynamic Range Multi-standard CMOS Mixer for GSM, UMTS. IEEE 802.11; 2008.
Razavi B. A 1.5 V 900 MHz down conversion mixer, ISSCC96/Session 3/ Communication building block /Paper TP 3.1, February 8, 1996.
Kwok-Kei KT, Mak K-C, Ma D, Luong HC. A 2-V 900-MHz CMOS mixer for GSM receivers. IEEE; 2000.
Long S. Agilent EEs of EDA – Design Seminar: RFIC MOS Gilbert Cell Mixer Design, June 1999.
DOI: https://doi.org/10.37591/jscrs.v4i1.852
Refbacks
- There are currently no refbacks.